Dissertations / Theses: 'Computer-controlled system'

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Thottan, Jacob A. "Micro-computer-controlled soil nitrate measurement system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/MQ31647.pdf.

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Mehta, Hemant. "Computer controlled deep level transient spectroscopy system." Thesis, Kansas State University, 1986. http://hdl.handle.net/2097/9936.

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Law, Eugene L. "COMPUTER CONTROLLED TELEMETRY RECEIVE AND RECORD SYSTEM." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613773.

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International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada
This paper will describe the Pacific Missile Test Center’s (PMTC) approach to a computer controlled telemetry receive and record system. The advantages of this system include: fast, accurate equipment setup and interconnection, automatic verification of operational status, and simplified signal monitoring. PMTC personnel developed the system architecture and software. The system hardware is all unmodified off-the-shelf equipment. The main design drivers were cost, reliability, and minimizing the effect of any single point failure. The system uses many individual switches instead of a small number of large switch matrices. Manual patching capability has been maintained. This patching system provides a backup solution if all the computers get “zapped”. The patching system also provides increased signal routing flexibility.

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Chang, Michael Ming Yuen. "A computer-controlled system in transmission electron microscopy." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292941.

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Herdlick, Bryan E. "Computer-controlled photodetector characterization system (design and construction)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FHerdlick.pdf.

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McGee, Brian Gerard. "A time-based computer controlled dry kiln system." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/90975.

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A computer controlled dry kiln system, designed and assembled at Virginia Tech, was used in a comparison study of end check damage and acoustic emission count rate for red oak wood samples using two variations of a drying schedule based upon a standard 4/4 red oak drying schedule (T4D2). Time was the controlling variable for the system. In run A, the lumber samples were dried using eight large step changes in temperature and relative humidity. In run B, a similar charge was dried over the same time period using 48 smaller step changes in temperature and relative humidity. The lumber samples that were dried with the schedule featuring large changes in temperature and relative humidity suffered much more extensive end check damage than the wood samples dried with a schedule employing smaller changes in temperature and humidity. The acoustic emission count rate data were not recorded in the final tests due to equipment malfunction. Acoustic emission count rate data recorded from preliminary drying runs indicated that the acoustic emission count rate from a sample board increases with large changes in the ambient air temperature and relative humidity. It then decreases to zero as the wood surfaces achieve an equilibrium state. The automated kiln control system performed successfully.
M.S.

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Hart, Michael James. "A COMPUTER CONTROLLED TYPE-2 TELEMETRY TRACKING SYSTEM." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613432.

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International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The seven WSMR Transportable Telemetry Acquisition Systems (TTAS), have served WSMR well as primary telemetry tracking systems since their acquisition over twenty years ago. Increasing maintenance demands for the original analog position control system (the antenna feed, servo power amplifiers, and position compensation) coupled with the potential for substantial tracking system performance improvement and self-diagnostic capability offered by current technology led to the establishment of a new instrumentation development task at WSMR whose objective was the development of a new, almost totally digital prototype tracking system to replace the aging analog control system in one of the TTAS’s. A modern conical scan feed has replaced the original monopulse feed, pulse-width-modulated power amplifiers have replaced the originals using SCR’s, and a VMEbus-based computer using a real-time operating system has replaced the analog compensation and overall control of the system. In this paper, following an overview of the prototype tracking system, the results of the development of a new position control algorithm for the prototype tracking system are described using root loci, computer simulation, and from the actual tracking system using servo test software developed for the computer controller. The results of the study of the old analog control system using computer simulation are presented for comparison. Problems encountered with the TTAS directly affecting position control are also presented. The new position control algorithm was designed to accommodate all of the critical tracking system nonlinearities (power amplifier saturation, current limiting, dead band, and control output saturation), all tracking modes (autotrack, manual, and using external pointing data), different operating bandwidths, and all possible drive inputs to the system. It has converted the tracking system from a type-1 to a type-2 control system improving the dynamic capability of the TTAs.

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BRUHNS, THOMAS VICTOR. "HARDWARE AND SOFTWARE FOR A COMPUTER CONTROLLED LIDAR SYSTEM." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188042.

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The hardware and software for a computer controlled optical radar, or lidar, system are described. The system builds on a previously installed pulsed ruby backscatter lidar, capable of acquiring data at controlled azimuth and elevation angles through the atmosphere. The described system replaces hardwired logic with computer control. Two coupled computers are used to allow a degree of real time control while data are processed. One of these computers reads and controls mount elevation angle, reads the laser energy monitor, and senses firing of the laser. The other computer serves as a user interface, and receives the lidar return data from a digitizer and memory, and the angle and energy information from the other computer. The second computer also outputs data to a disc drive. The software provided with the system is described, and the feasibility of additional software for both control and data processing is explored. Particular attention is given to data integrity and instrument and computer operation in the presence of the high energy pulses used to drive the laser. A previously described laser energy monitor has been improved to isolate it from laser transients. Mount elevation angles are monitored with an absolute angle readout. As a troubleshooting aid, a simulator with an output that approximates the lidar receiver output was developed. Its output is digitally generated and provides a known repetitive signal. Operating procedures are described for standard data acquisition, and troubleshooting is outlined. The system can be used by a relatively inexperienced operator; English sentences are displayed on the system console CRT terminal to lead the operator through data acquisition once the system hardware is turned on. A brief synopsis of data acquired on the system is given. Those data are used as the basis of other referenced papers. It constitutes soundings for over one hundred days. One high point has been operation of the system in conjunction with a balloon borne atmospheric particulate sampling package. The system has also been used occasionally as the transmitter of a lidar system with physically separated receiver and transmitter.

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Frink, Brandon S. "Modeling and construction of a computer controlled air conditioning system." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/362.

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Hatanaka, Iwao 1964. "A model-based framework for risk assessment in human-computer controlled systems." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/91718.

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Qudeisat, Mohammed Ahmed. "A networked and computer-controlled multi-sensor 3D fringe projection measurement system." Thesis, Liverpool John Moores University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589740.

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A 3D non-contact real-time multi sensor fringe measurement system is proposed in this research. The system is designed to help radiotherapists detect human body measurements and motions during the cancer radiotherapy treatment process in real-time. The ability to detect body movements will help radiotherapists to accurately estimate the actual radiation dose that was delivered to the tumour volume. The researchers at JMU built a three-sensor system that covers 3600 around the object so that the system can have full visibility around the human body under treatment. Each sensor consists of one camera and one projector and each sensor works on its own exclusive light bandwidth to enable all sensors to work concurrently without affecting each other's operation. Each sensor is connected to its own data processing unit that controls its operation and carries out data processing tasks and all three data processing units are connected to a main central computer that controls and coordinates the operation of the three sensors. The author developed a novel empirical calibration approach to calibrate the three sensors concurrently; the proposed calibration approach solves the depth calibration problem and the perspective problem to provide the system with the ability to measure 3D shapes in an absolute physical coordinate system that is consistent with the coordinate system of the radiotherapy treatment machine. The author also implemented two algorithms for absolute 3D body shape measurements. The first is a multi-frame algorithm using the phase-stepping technique while the second is a single-frame algorithm that is based on the Fourier Fringe Analysis technique. A performance comparison between these two methods is given in the literature. Finally, the author describes measurement validation and error reporting methods to provide the system with the ability to estimate the quality of its own measurements, to detect errors and report failures in the measurement process. This feature is very crucial to system operation especially in sensitive applications like cancer treatment as it provides qualitative and quantitative measures of validity to the measurements. This research has resulted in a practical real-time system that is implemented at both, the LAB and Christie Hospital Manchester. The system has been thoroughly tested and it has shown very good performance in terms of reliability, accuracy, usability and speed.

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Mleczko, Richard R., and mikewood@deakin edu au. "The development of a new versatile computer controlled electrochemical/ESR data acquisition system." Deakin University. School of Sciences, 1990. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20051125.105959.

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A new versatile computer controlled electrochemlcal/ESR data acquisition system has been developed for the Investigation of short-lived radicals with life-times of 20 milliseconds and greater, Different computer programs have been developed to monitor the decay of radicals; over hours or minutes, seconds or milliseconds. Signal averaging and Fourier smoothing is employed in order to improve the signal to noise ratio. Two microcomputers are used to control the system, one home-made computer containing the M6800 chip which controls the magnetic field, and an IBM PC XT which controls the electrochemistry and the data acquisition. The computer programs are written in Fortran and C, and call machine language subroutines, The system functions by having the radical generated by an electrochemical pulse: after or during the pulse the ESR data are collected. Decaying radicals which have half-lives of seconds or greater have their spectra collected in the magnetic field domain, which can be swept as fast as 200 Gauss per second. The decay of the radicals in the millisecond region is monitored by time-resolved ESR: a technique in which data is collected in both the time domain and in the magnetic field domain. Previously, time-resolved ESR has been used (without field modulation) to investigate ultra-short-lived species with life-times in the region of only a few microseconds. The application of the data acquisition system to chemical systems is illustrated. This is the first time a computer controlled system whereby the radical is generated by electrochemical means and subsequently the ESR data collected, has been developed.

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Solares, Hernández Guido Renato. "An automated computer controlled counting system for radionuclide analysis of corrosion products in LWR coolant systems." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14384.

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Sanders, Robert W. "System identification and robust control of a high-precision computer numerical controlled machine." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1603105.

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Modeling a feed axis of a Computer Numerical Controlled (CNC) machine is a challenging problem due to its time-varying dynamics and parametric uncertainties. A simple but practical system identification method was proposed in this thesis and combined with the H∞ technique to design a robust controller for a high-precision CNC milling machine. The ballscrew driven worktable of a Southwestern Industries 2^OP Mill was modeled by means of a standard frequency response test. The model was linearized around the first axial resonance, and then used to synthesize an H∞ controller based on the linear matrix inequality approach. The simulated closed-loop system was subjected to disturbances and to a reference tool path to test its disturbance rejection and command following capabilities. Another simulated closed-loop system based on the machine’s actual Proportional-Integral-Derivative (PID) controller was created and subjected to the same tests in order to compare the performance of the two controllers. In all simulations, the H∞ controller displayed better performance than the PID controller.

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Summer, Matthew D. "Design algorithm of a novel computer-controlled gripper for a live bird transfer system." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17139.

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Wildschek, Reto. "Surface capture using near-real-time photogrammetry for a computer numerically controlled milling system." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/18605.

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During the past three years, a research project has been carried out in the Department of Mechanical Engineering at UCT, directed at developing a system to accurately reproduce three-dimensional (3D), sculptured surfaces on a three axis computer numerically controlled (CNC) milling machine. Sculptured surfaces are surfaces that cannot easily be represented mathematically. The project was divided into two parts: the development of an automatic noncontact 3D measuring system, and the development of a milling system capable of machining 30 sculptured surfaces (Back, 1988). The immediate need for such a system exists for the manufacture of medical prostheses. The writer undertook to investigate the measurement system, .with the objective to develop a non-contact measuring system that can be used to 'map' a sculptured surface so that it can be represented by a set of XYZ coordinates in the form required by the milling system developed by Back (1988). This thesis describes the development of a PC-based near-realtime photogrammetry system (PHOENICS) for surf ace capture. The topic is introduced by describing photogrammetric principles as used for non-contact measurements of objects. A number of different algorithms for image target detection, centering and matching is investigated. The approach to image matching adopted was the projection of a regular grid onto the surface with subsequent matching of conjugate grid intersections. A general algorithm which automatically detects crosses on a line and finds their accurate centres was developed. This algorithm was then extended from finding the crosses on a line, to finding all the intersection points of a grid. The algorithms were programmed in TRUE BASIC and specifically adapted for use with PHOENICS as an object point matching tool. The non-contact surface measuring technique which was developed was used in conjunction with the milling system developed by Back (1988) to replicate a test object. This test proved that the combined system is suitable for the manufacture of sculptured surf aces. The accuracy requirements for the manufacture of medical prostheses can be achieved with the combined measuring and milling system. At an object-to-camera distance of 0.5 m, points on a surface can be measured with an accuracy of approximately 0.3 mm at an interval of 5 mm. This corresponds to a relative accuracy of 1:1600. Back (1988) reported an average undercutting error of 0.46 mm for the milling system. This combines to an uncertainty of 0.55 mm. Finally, the limitations of PHOENICS at its prototype stage as a surface measuring tool are discussed, in particular the factors influencing the system's accuracy. PHOENICS is an ongoing project and the thesis is concluded by some recommendations for further research work.

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Lyyra, Antti Kalervo. "From components to compositions : (de-)construction of computer-controlled behaviour with the robot operating system." Thesis, London School of Economics and Political Science (University of London), 2018. http://etheses.lse.ac.uk/3837/.

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Robots and autonomous systems play an increasingly important role in modern societies. This role is expected to increase as the computational methods and capabilities advance. Robots and autonomous systems produce goal-directed and context-dependent behaviour with an aim to loosen the coupling between the machines and their operators. These systems are a domain of complex digital innovation that intertwines the physical and digital worlds with computer-controlled behaviour as robots and autonomous systems render their behaviour from the interaction with the surrounding environment. Complex product and system innovation literature maintains that designers are expected to have detailed knowledge of different components and their interactions. To the contrary, digital innovation literature holds that end-product agnostic components can be generatively combined from heterogeneous sources utilising standardised interfaces. An in-depth case study into the Robot Operating System (ROS) was conducted to explore the conceptual tension between the specificity of designs and distributedness of knowledge and control in the context of complex digital innovation. The thematic analysis of documentary evidence, field notes and interviews produced three contributions. First, the case description presents how ROS has evolved over the past ten years to a global open-source community that is widely used in the development of robots and autonomous systems. Second, a model that conceptualises robots and autonomous as contextually bound and embodied chains of transformation is proposed to describe the structural and functional dynamics of complex digital innovation. Third, the generative-integrative mode of development is proposed to characterise the process of innovation that begins from a generative combination of components and subsequently proceeds to the integration phase during which the system behaviour is experimented, observed and adjusted. As the initial combination builds upon underspecification and constructive ambiguity, the generative combination is gradually crafted into a more dependable composition through the iterative removal of semantic incongruences.

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Bambeck, Timothy J. "A computer controlled data acquisition and control system for a shape-memory alloy artificial muscle." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1174935244.

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Razzaq, Leena. "Investigating Learning in an Intelligent Tutoring System through Randomized Controlled Experiments." Digital WPI, 2009. https://digitalcommons.wpi.edu/etd-dissertations/370.

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"In the United States, many students are doing poorly on new high-stakes standards-based tests that are required by the No Child Left Behind Act of 2002. Teachers are expected to cover more material to address all of the topics covered in standardized tests, and instructional time is more precious than ever. Educators want to know that the interventions that they are using in their classrooms are effective for students of varying abilities. Many educational technologies rely on tutored problem solving, which requires students to work through problems step-by-step while the system provides hints and feedback, to improve student learning. Intelligent tutoring researchers, education scientists and cognitive scientists are interested in knowing whether tutored problem solving is effective and for whom. Intelligent tutoring systems have the ability to adapt to individual students but need to know what types of feedback to present to individual students for the best and most efficient learning results. This dissertation presents an evaluation of the ASSISTment System, an intelligent tutoring system for the domain of middle school mathematics. In general, students were found to learn when engaging in tutored problem solving in the ASSISTment System. Students using the ASSISTment System also learned more when compared to paper-and-pencil problem-solving. This dissertation puts together a series of randomized controlled studies to build a comprehensive theory about when different types of tutoring feedback are more appropriate in an intelligent tutoring system. Data from these studies were used to analyze whether interactive tutored problem solving in an intelligent tutoring system is more effective than less interactive methods of allowing students to solve problems. This dissertation is novel in that it presents a theory that designers of intelligent tutoring systems could use to better adapt their software to the needs of students. One of the interesting results showed is that the effectiveness of tutored problem solving in an intelligent tutoring system is dependent on the math proficiency of the students. Students with low math proficiency learned more when they engaged in interactive tutoring sessions where they worked on one step at a time, and students with high math proficiency learned more when they were given the whole solution at once. More interactive methods of tutoring take more time versus less interactive methods. The data showed that it is worth the extra time it takes for students with low math proficiency. The main contribution of this dissertation is the development of a comprehensive theory of when educational technologies should use tutored problem solving to help students learn compared to other feedback mechanisms such as hints on demand, worked out solutions, worked examples and educational web pages. "

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England, Robert A. "A computer-controlled system for measuring rates of uptake of potassium, nitrate and phosphate by whole plants." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293864.

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Gonz?alez, Rico Antonio. "Growth characteristics and water demand of three Quercus species under reduced irrigation using a computer-controlled irrigation system /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487843314696831.

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Haddock, Paul C. "TELEMETERY DATA COLLECTION FROM OSCAR SATELLITES." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607347.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California
This paper discusses the design, configuration, and operation of a satellite station built for the Center for Space Telemetering and Telecommunications Laboratory in the Klipsch School of Electrical and Computer Engineering Engineering at New Mexico State University (NMSU). This satellite station consists of a computer-controlled antenna tracking system, 2m/70cm transceiver, satellite tracking software, and a demodulator. The satellite station receives satellite telemetry, allows for voice communications, and will be used in future classes. Currently this satellite station is receiving telemetry from an amateur radio satellite, UoSAT-OSCAR-11. Amateur radio satellites are referred to as Orbiting Satellites Carrying Amateur Radio (OSCAR) satellites.

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Jung, Seok Min, and Seok Min Jung. "Design and Implementation of Low Jitter Clock Generators in Communication and Aerospace System." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621292.

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The high demands on data processing and bandwidth in wireless/wireline communication and aerospace systems have been pushing forward circuit design techniques to their limitations to obtain maximum performances with respect to high operating frequency, low noise, small area, and low power consumption. Clock generators are essential components in numerous circuits, for instance, frequency synthesizers for high speed transceivers, clock sources for microprocessors, noise suppressed zero-delay buffers in system-on-chips (SOCs), and clock and data recovery (CDR) systems. Furthermore, clock generators are required to provide low jitter and high precision clocks in fully integrated image reject receivers and an ultra-wide tunability in time-interleaved applications. We explore several circuit design techniques and implementations of low jitter clock generator in this thesis. Firstly, a low jitter and wide range digital phase-locked loop (DPLL) operating 8 ~ 16 GHz is illustrated using a dual path digital loop filter (DLF). In order to mitigate the phase jitter in the phase detector (PD), we implement the separate loop filter and the output is not affected by the proportional path. For the stable operation, a 4 ~ 8 GHz linear phase interpolator (PI) is implemented in the proportional path. In addition, we design a low phase noise digitally controlled oscillator (DCO) using inductive tuning technique based on switched mutual coupling for wide operating range. The proposed DPLL implemented in 65 nm CMOS technology shows an outstanding figure-of-merit (FOM) over other state-of-art DPLLs in term of root mean square (RMS) and deterministic jitter (DJ). Secondly, we discuss a radiation-hardened-by-design (RHBD) PLL using a feedback voltage-controlled oscillator (FBVCO) in order to reduce DJ due to the radiation attack on the control voltage. Different from a conventional open loop VCO, the proposed FBVCO has a negative control loop and is composed of an open loop VCO, an integrator and a switched-capacitor resistor. Since the input to output of the FBVCO has a low-pass characteristic, any disturbance on the control voltage should be filtered and cannot affect the output phase. We are able to reduce the output frequency variation approximately 75% compared to the conventional PLL when the radiation pulse strikes on the control voltage. The proposed RHBD PLL is implemented in 130 nm and consumes 6.2 mW at 400 MHz operating frequency. Thirdly, a novel adaptive-bandwidth PLL is illustrated to optimize the jitter performance in a wide operating frequency range. We achieve a constant ratio of bandwidth and reference frequency with a closed loop VCO and an overdamping system with a charge pump (CP) current proportional to the VCO frequency for the adaptive-bandwidth technique. The proposed adaptive-bandwidth PLL presents 0.6% RMS jitter over the entire frequency range from 320 MHz to 2.56 GHz, which is 70% smaller than the conventional fixed-bandwidth PLL. Finally, we have developed a new feedback DCO to achieve a linear gain of DCO so that the DPLL can provide stability and a wide operating range in different process variations. Due to the negative feedback loop of the proposed DCO, the feedback DCO presents a linear gain from an input digital word to an output frequency. Moreover, we can control the bandwidth of the feedback DCO to optimize the total output phase noise in DPLL. In simulation, we can obtain 17 MHz/LSB of the peak-to-peak gain of the feedback DCO, which is reduced 96% over the conventional DCO.

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Nelson, Eric (Eric Freeman) 1964. "Dynamic building enclosures : the design of an innovative constructive system which permits mechanically-driven, computer-controlled shape transformations to the building envelope." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/69400.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 1998.
Includes bibliographical references (p. 85).
Dynamic Building Enclosures is a system of prefabricated, lightweight, kit-of-parts wall and/or roof elements. This system has the unique capability of dynamically altering, or mutating its shape in reaction to changing user requirements or site climate conditions through the manipulation of a mechanically-driven, computer-controlled frame. The system's ability to actively accommodate multiple functions (potentially with high-performance specifications) within a single space would make it appropriate and desirable for application to a broad spectrum of building typologies. It is postulated that industrial fabrication of standardized elements will increase its economic viability-especially when compared to the multitude of expensive, static, specialized building components it would replace. Since it reacts to optimize environmental performance (temperature, humidity, acoustics, ventilation, and lighting) in changing site conditions it will also be more environmentally responsive and energy-efficient than conventional systems. The objective of this research is to explore the potential gains to users and the building industry of developing an industrially produced building system without the generally associated drawbacks of monotonous, repetitive layouts; inflexibility to changes of use, and the inability to adapt to varying site conditions. The prefabricated kit-of-parts which comprise the system will overlay the complementary structural behavior of form-active structures (cable, tent and arch systems), and vectoractive structures (trusses and space trusses) . The building system design will include: a strut; a node, which will allow the rotation of the struts to accommodate non-regular geometries, and an enclosure system which maintains the desired separation of interior and exterior environments for the various spatial configurations.
by Eric Nelson.
S.M.

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Wang, Bin, and s3115026@student rmit edu au. "On Discretization of Sliding Mode Control Systems." RMIT University. Electrical and Computer Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080822.145013.

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Sliding mode control (SMC) has been successfully applied to many practical control problems due to its attractive features such as invariance to matched uncertainties. The characteristic feature of a continuous-time SMC system is that sliding mode occurs on a prescribed manifold, where switching control is employed to maintain the state on the surface. When a sliding mode is realized, the system exhibits some superior robustness properties with respect to external matched uncertainties. However, the realization of the ideal sliding mode requires switching with an infinite frequency. Control algorithms are now commonly implemented in digital electronics due to the increasingly affordable microprocessor hardware although the essential conceptual framework of the feedback design still remains to be in the continuous-time domain. Discrete sliding mode control has been extensively studied to address some basic questions associated with the sliding mode control of discrete-time systems with relatively low switching frequencies. However, the complex dynamical behaviours due to discretization in continuous-time SMC systems have not yet been fully explored. In this thesis, the discretization behaviours of SMC systems are investigated. In particular, one of the most frequently used discretization schemes for digital controller implementation, the zero-order-holder discretization, is studied. First, single-input SMC systems are discretized, stability and boundary conditions of the digitized SMC systems are derived. Furthermore, some inherent dynamical properties such as periodic phenomenon, of the discretized SMC systems are studied. We also explored the discretization behaviours of the disturbed SMC systems. Their steady-state behaviours are discussed using a symbolic dynamics approach under the constant and periodic matched uncertainties. Next, discretized high-order SMC systems and sliding mode based observers are explored using the same analysis method. At last, the thesis investigates discretization effects on the SMC systems with multiple inputs. Some conditions are first derived for ensuring the

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Paterson, Colin Alexander. "Computer controlled suspension systems." Thesis, Coventry University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357047.

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Hakl, Henry. "Computer-controlled human body coordination." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/49756.

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Thesis (MSc) -- University of Stellenbosch, 2003.
ENGLISH ABSTRACT: A need for intelligent robotic machines is identified. Research and experiments have focussed on stable, or relatively stable, dynamic simulated systems to demonstrate the feasibility of embedding advanced AI into dynamic physical systems. This thesis presents an attempt to scale the techniques to a dynamically highly unstable system - the coordination of movements in a humanoid model. Environmental simulation, articulated systems and artificial intelligence methods are identified as three essential layers for a complete and unified approach to embedding AI into robotic machinery. The history of the physics subsystem for this project is discussed, leading to the adoption of the Open Dynamics Engine as the physics simulator of choice. An approach to articulated systems is presented along with the EBNF of a hierarchical articulated system that was used to describe the model. A revised form of evolution is presented and justified. An AI model that makes use of this new evolutionary paradigm is introduced. A variety of AI variants are defined and simulated. The results of these simulations are presented and analysed. Based on these results recommendations for future work are made.
AFRIKAANSE OPSOMMING: Die beheer van dinamiese masjiene, soos intelligente robotte, is tans beperk tot fisies stabilie - of relatief stabiele - sisteme. In hierdie tesis word die tegnieke van kunsmatige intelligensie (KI) toegepas op die kontrole en beheer van 'n dinamies hoogs onstabiele sisteem: 'n Humanoïede model. Fisiese simulasie, geartikuleerde sisteme en kunmatige intelligensie metodes word geïdentifiseer as drie noodsaaklike vereistes vir 'n volledige en eenvormige benadering tot KI beheer in robotte. Die implementasie van 'n fisiese simulator word beskryf, en 'n motivering vir die gebruik van die sogenaamde "Open Dynamics Engine" as fisiese simulator word gegee. 'n Benadering tot geartikuleerde sisteme word beskryf, tesame met die EBNF van 'n hierargiese geartikuleerde sisteem wat gebruik is om die model te beskryf. 'n Nuwe interpretasie vir evolusie word voorgestel, wat die basis vorm van 'n KI model wat in die tesis gebruik word. 'n Verskeidenheid van KI variasies word gedefineer en gesimuleer, en die resultate word beskryf en ontleed. Voorstelle vir verdere navorsing word gemaak.

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Dan-Isa, Ado. "Discrete-time design for computer controlled systems." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283145.

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Lugnegård, Mikael. "Finding missing people : Hur kan man effektivisera arbete med att söka efter försvunna personer?" Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125219.

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Finding missing people and obtaining an overview of complex emergencies is very demanding and requires costly resources. I have on a few occasions sought after my grandfather, who, when he got Alzheimer, liked to go for a stroll at night (!) when my grandmother was sleeping. Those kind of situations are very stressful, especially a cold winter night. During my first 25 years I was part of a dedicated outdoor culture with countless ski trips, mountain hikes, mountain bike trips and many hours in primarily Swedish nature. It happened on a few occasions that we came in contact with people who worked with rescue operations in this type of environment. It could be about hikers who strayed away or been injured in the inaccessible nature, lost skiers in the mountain massifs around Riksgränsen, berry pickers in the Västerbotten forests etc. There are many examples of this type of situations and it's reflections on these scenarios and similar current problem which is the basis for this project. Every year, about 7000 people are reported missing in Sweden. Of these remains about 30-35 vanished. Globally, the figure is huge. Earthquakes, floods and other hit by natural occurs despite various preventive measures. There are many occasions where the search, reconnaissance and location of individuals as well as physical problems play a critical role, but where human capacity seldom is sufficient. Search party chains (organized by organisations like Missing People) requires significant human resources and costs precious time, police helicopter reconnaissance is economically very costly, not environmentally friendly and involves a significant margin of error. With these statements as background, I would look at the possibility of creating a thorough design solution that contributes to people in need can be located, provided security and helped significantly faster than today without requiring significant resources. With this as a backdrop, I wanted to create a concept that would contribute to that more people were found and could be saved. Through an extensive research of how a rescue operation is conducted, interviews with police and Missing People, as well as observations during actual operations, I identified a few main problem areas that my concept generation would center around. Together with my sponsor, we wanted to create something that can best be described as a robotic eagle with hyper vision, long flight time and a positive association for the victim. The result is Aetos (Greek for eagle). A modular drone-system with innovative features to handle with long flights and demanding rescue missions. Thanks to an aerodynamic shape and a remote-controlled system Aetos requires minimal resources to create overview and help in locating the missing person. We want to save lives, and it can Aetos that.

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Höijer, David, and Hannes Jansson. "Voice-controlled order system." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-45033.

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To order pick-up food by using your computer or phone is nothing new. Food delivery companies such as FoodHero and Uber Eats along with many other around the world base their entire company idea around the food order and delivery process. For a company to stand out in such a vast market can sometimes be quite tricky. Sometimes your company needs a niche to stand out in the crowd. This project aims to create such a niche in an order system prototype based on voice-controlled systems and conversation. This prototype allows users to place food orders through only the use of natural speech and a voice assistant. The prototype utilizes products and services from both Amazon and Google to create the order system structure. The ordering system also takes advantage of the serverless architecture that both Amazon and Google provide. The end result of this project is a simple, convenient, and user-friendly prototype

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Hardy, Martin Charles. "Control logic evaluation of bespoke computer controlled machine tools." Thesis, University of Huddersfield, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359143.

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Kho, Nancy Ellen 1981. "COMMANIMATION : a speech-controlled animation system." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28412.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (p. 66-68).
In order to make the task of animation creation easy, a different approach should be presented to the user. This thesis describes a new approach to animation creation. In this approach, the representation of animation is based on changes in state and not descriptions of the state. Users issue commands, which change the state of objects, to quickly and easily create new and interesting animations. The implemented system, called COMMANIMATION, also includes speech recognition technology, which allows for a more natural user interface. In addition to exploring animation, COMMANIMATION, a system that runs over three networked computers, provides a platform to study issues in pervasive computing, such as the use of multimodal inputs, error control, and error detection.
by Nancy Ellen Kho.
M.Eng.

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Lu, Roberto Francisco-Yi. "Implementation of a remote computer controlled automatic guided vehicle /." This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10242009-020053/.

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Zhang, Guoging 1963. "Knowledge based simulation system--an application in controlled environment simulation system." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/292001.

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This thesis systematically identifies the building blocks of a knowledge based system for simulation and modelling. We present the design and implementation of Controlled Environment Simulation System (CESS), which bridges a discrete event simulation system (DEVS-SCHEME) and a continuous simulation system (TRNSYS). The rationale behind the approach is that a discrete or a continuous model can be abstracted to a level at which the uniform treatment on these two kinds of models is possible. A top-down approach to model creation (abstraction) is proposed, in contrast to the traditional bottom-up approach. CESS is implemented on an object-oriented programming environment (SCOOPS on TI-SCHEME). A knowledge representation scheme known as System Entity Structure is employed for MODEL management, recording system structural knowledge, and the utilization of techniques in Artificial Intelligence. Some prospective research topics are also brought up.

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Hjern, Gunnar. "The modernization of a DOS-basedtime critical solar cell LBICmeasurement system." Thesis, Karlstads universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74322.

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LBIC is a technique for scanning the local quantum efficiency of solar cells. This kind of measurements needs a highly specialized, and time critical controlling software. In 1996 the client, professor Markus Rinio, constructed an LBIC system, and wrote the controlling software as a Turbo-Pascal 7.0 application, running under the MS-DOS 6.22 operating system. By now (2018) both the software and several hardware components are in dire need to be modernized. This thesis thoroughly describes several important aspects of this work, and the considerations needed for a successful result. This includes both very foundational choices about the software architecture, the choice of suitable operating system, the threading model, and the adaptation to new hardware with vastly different behavior. The project also included a new hardware module for position reports and instrument triggering, as well as several adaptations to transform the DOS-based LBIC software into a pleasant modern GUI application.

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Marsh, Clive. "A nonlinear control design methodology for computer-controlled vehicle suspension systems." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/27995.

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This study demonstrates a new nonlinear controller design methodology applicable to automotive suspension systems. It enhances the ability of the designer to tackle the complex design problem of a controller for a computer-controlled suspension. Based on the principles of optimal control, it permits the use of more general system models and cost functions than the standard linear optimal design techniques and hence, increases the freedom of the designer. It implements the control with an optimal, nonlinear feedback law and is shown to have the potential to improve vehicle performance.

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Benoit, Landry. "Imagerie multimodalité appliquée au phénotypage haut-débit des semences et plantules." Thesis, Angers, 2015. http://www.theses.fr/2015ANGE0084.

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Au cours de ce travail nous avons utilisé les potentialités de différentes modalités d'imagerie, que nous appliquons au domaine du végétal afin de contribuer au phénotypage haut-débit des semences et plantules. Nous nous somme principalement consacré à la recherche de réponses à deux problématiques spécifiques et importantes de ce secteur. Nous commençons par montrer l'applicabilité de l'imagerie en lumière visible inactinique et de l'imagerie thermographique passive pour imager le développement des semences et plantules, un phénomène biologique se déroulant normalement dans le sol et l’obscurité. Nous présentons nos apports à ce type d’imagerie, au travers de nos contributions à la conception et à la réalisation d’un système de vision en imagerie visible inactinique, ayant pour finalité la réalisation de mesures individualisées automatisées sur les semences, les plantules et les organes des plantules. Ce système gère les croisements de plantules, via l'utilisation originale de la diffusion anisotrope, ce qui nous a permis de multiplier, sans perte d'information, les débits par dix. De plus, ce système réalise la séparation des organes au moyen d’un critère générique basé sur le gravitropisme. La validation des algorithmes de traitement d'images du système de vision utilise des voies originales (simulation numérique et test de l'influence de l'incertitude via simulation agronomique). L’imagerie thermographique, qui capte le rayonnement thermique passif des objets, nous permet de visualiser et de mesurer les semences et plantules dans l'obscurité. Elle permet aussi de réaliser la segmentation et le suivi des organes de plantules. Cette technologie d'imagerie nous a aussi permis de montrer la faisabilité d'un dosage non destructif de teneur en sucre des organes de plantules de betterave. Ensuite nous proposons une méthodologie générique permettant la conception de capteurs bas-coût spectralement optimisés, en fonction de tâches applicatives déterminées. Cette méthodologie utilise la théorie de l’information, pour extraire de l’imagerie hyperspectrale, relativement coûteuse, l’information utile à la conception des capteurs dédiés bas-coût. L’intérêt de cette méthodologie pour le phénotypage des plantes est montré et justifie le transfert de celle-ci au monde de la recherche en biologie végétale
Along this work, we have used the potentiality of different modalities of imagery that we apply to the plant domain so as to contribute to the high-throughput phenotyping of seeds and seedlings. We have mainly committed ourselves to the search for answers to two specific and important problematic in this domain. We begin by showing the applicability of visible imaging using an inactinic light and passive thermographic imaging to image the development of seeds and seedlings, a biological phenomenon usually occurring in soil and darkness. We present our contributions to this type of imaging through our contributions to the conception and the realization of a vision system using visible inactinic imaging, whose finality is the realization of individualized automated measurement on the seeds, the seedlings and the organs of the seedlings. This system handle seedling crossing, through the original use of anisotropic diffusion, which allowed us to multiply, without information loss, the output by ten. Furthermore, this system carries out the separation of the organs by means of a generic criterion based on gravitropism. The validation of the image processing algorithms of the vision system use original ways (numerical simulation and test of the influence of the uncertainty through agronomic simulation). Thermographic imaging, which captures the passive heat radiation of objects, allows us to visualize and to measure seeds and seedlings in the darkness. It also allows realizing the segmentation and the tracking of the organs of seedlings. This imaging technology also allowed us to demonstrate the feasibility of a non-destructive determination of sugar quantity in organs of beet seedlings. We then propose a generic methodology that allows the conception of spectrally optimized low-cost sensors, according to determined application tasks. This methodology uses information theory, to extract from, relatively expensive, hyperspectral imaging, the information needed for the conception of the dedicated low-cost sensors. The interest of this methodology for plant phenotyping has been shown and justifies its transfer to the world of research in plant biology

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Alavizadeh, Zahra. "PLC Controlled System for Local Humidity Management in Electronic Enclosures." Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-13148.

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This master thesis is about investigation a power efficient anti-moisture device thatcan be implemented in electronic enclosures in severe climatic environments.First, some of the existing knowledge and previous works were introduced. Then arelevant theoretical background including three main approaches in humiditymanagement are described, comparison between the enclosure heaters and localheaters, some psychrometics concepts that have been used in the project, heattransfer fundamentals, environmental test basics, some humidity and temperaturesensing techniques, computational fluid dynamics, programmable logic controlfundamentals, comparison PLCs with microcontrollers was provided.A series experiments have been performed in order to find the power efficient andmost effective anti-moisture method. Based on the analysis of the experiment data,the local heater system has been designed. CFD assisted parametric study of thelocal heater has been performed in order to find the best feasible design includingthe size and location. The local heater has been built based on the results ofparametric study. Different materials have been tested in laboratory in order tofind the proper material for final prototype of heater. The implemented localheater has been integrated with programmable logic control device. The controlalgorithm has been developed for activation/deactivation of local heater. The logiccontrolled PCB local heater has been experimentally evaluated.In the end the results achieved from environmental test have been presented andanalyzed. Some conclusions on the results and also future work have been discussed.

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Inan, Tolga. "Four Quadrant Computer Based Motor Tests System Develeopmenet." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1092626/index.pdf.

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Development and research activities about electric motors require realistic feedback about the motor performance and efficiency. This feedback can be supplied by the help of the motor test systems without waiting for the end-user. Throughout this study, a computer based motor test system with four quadrant loading capability is developed. The system is capable of entering user-defined test conditions, performing tests, acquisition of test data and displaying test results. The system has a visual user interface that can handle all tasks from a single computer.

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Wallenberg, Marcus. "A Single-Camera Gaze Tracker using Controlled Infrared Illumination." Thesis, Linköping University, Department of Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-17398.

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Gaze tracking is the estimation of the point in space a person is “looking at”. This is widely used in both diagnostic and interactive applications, such as visual attention studies and human-computer interaction. The most common commercial solution used to track gaze today uses a combination of infrared illumination and one or more cameras. These commercial solutions are reliable and accurate, but often expensive. The aim of this thesis is to construct a simple single-camera gaze tracker from off-the-shelf components. The method used for gaze tracking is based on infrared illumination and a schematic model of the human eye. Based on images of reflections of specific light sources in the surfaces of the eye the user’s gaze point will be estimated. Evaluation is also performed on both the software and hardware components separately, and on the system as a whole. Accuracy is measured in spatial and angular deviation and the result is an average accuracy of approximately one degree on synthetic data and 0.24 to 1.5 degrees on real images at a range of 600 mm.

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BERTOLINI, Cristiano. "Evaluation of GUI testing techniques for system crashing: from real to model-based controlled experiments." Universidade Federal de Pernambuco, 2010. https://repositorio.ufpe.br/handle/123456789/2076.

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Made available in DSpace on 2014-06-12T15:54:24Z (GMT). No. of bitstreams: 2 arquivo7096_1.pdf: 2072025 bytes, checksum: ca8b71b9cfdeb09118a7c281cafe2872 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2010
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Aplicações para celular estão se tornando cada vez mais complexas, bem como testá-las. Teste de interfaces gráficas (GUI) é uma tendência atual e se faz, em geral, através da simulação de interações do usuário. Várias técnicas são propostas, no qual, eficiência (custo de execução) e eficácia (possibilidade de encontrar bugs) são os aspectosmais cruciais desejados pela industria. No entanto, avaliações mais sistemáticas são necessárias para identificar quais técnicas melhoram a eficiência e eficácia de tais aplicações. Esta tese apresenta uma avaliação experimental de duas técnicas de testes de GUI, denominadas de DH e BxT, que são usadas para testar aplicações de celulares com um histórico de erros reais. Estas técnicas são executadas por um longo período de tempo (timeout de 40h, por exemplo) tentando identificar as situações críticas que levam o sistema a uma situação inesperada, onde o sistema pode não continuar sua execução normal. Essa situação é chamada de estado de crash. A técnicaDHjá existia e é utilizadapela industriade software, propomos outra chamada de BxT. Em uma avaliação preliminar, comparamos eficácia e eficiência entre DH e BxT através de uma análise descritiva. Demonstramos que uma exploração sistemática, realizada pela BxT, é uma abordagem mais interessante para detectar falhas em aplicativos de celulares. Com base nos resultados preliminares, planejamos e executamos um experimento controlado para obter evidência estatística sobre sua eficiência e eficácia. Como ambas as técnicas são limitadas por um timeout de 40h, o experimento controlado apresenta resultados parciais e, portanto, realizamos uma investigação mais aprofundada através da análise de sobrevivência. Tal análise permite encontrar a probabilidade de crash de uma aplicação usando tanto DH quanto BxT. Como experimentos controlados são onerosos, propomos uma estratégia baseada em experimentos computacionais utilizando a linguagem PRISM e seu verificador de modelos para poder comparar técnicas de teste de GUI, em geral, e DH e BxT em particular. No entanto, os resultados para DH e BxT tem uma limitação: a precisão do modelo não é estatisticamente comprovada. Assim, propomos uma estratégia que consiste em utilizar os resultados anteriores da análise de sobrevivência para calibrar nossos modelos. Finalmente, utilizamos esta estratégia, já com os modelos calibrados, para avaliar uma nova técnica de teste de GUI chamada Hybrid-BxT (ou simplesmente H-BxT), que é uma combinação de DH e BxT

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Lyon, Eduardo. "Component based design and digital manufacturing: a design for manufacturing model for curved surfaces fabrication using three axes computer numerical controlled router." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/36531.

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This thesis explores new ways to integrate manufacturing processes information in to design phases. Through the use of design for manufacturing (DfM) concept, and looking at relations between its potential application in architectural production and its implementation using digital manufacturing technologies, the author implemented a DfM model that varies from previous models by incorporated learning in the process. This process was based on the incremental development and refinement of design heuristics and metrics. The DfM model developed in this research is a process model to be implemented as a framework within educational settings. The proposed model is based in two basic strategies; first a process description in the form of alternative design strategies; and second, the implementation of design heuristics and design metrics. Subsequently, the author tested and refined the model using a sequence of case studies with students. In the final stage, the research evaluated and further developed the DfM model in a component design case study. The general purpose in performing this case studies sequence was to test the proposed DfM model. The second objective was to refine the DfM model by capturing knowledge from the case studies. As a summary, this research conceptualizes from this top-down development approach to create a design for manufacturing model that integrates design and construction in architecture, based on three possible applications fields; DfM teaching approaches development, design processes improvement; and DfM methods development. The final purpose is to provide better foundational constructs for architectural education and to improve teaching approaches that integrate design and manufacturing.

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Aden, Hassan Abdullahi, and Källqvist Rasmus Karlsson. "Evaluating LoRa Physical as a Radio Link Technology for use in a Remote-Controlled Electric Switch System for a Network Bridge Radio-Node." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-247895.

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This report explores the design of a system for remotely switching electronics on and off within a range of at least 15 km, to be used with battery driven radio nodes for outdoor Wi-Fi network bridging. The application of the network bridges are connecting to remote networks, should Internet infrastructure fail during an emergency.The problem statement for the report was “What is a suitable radio link technology for use in a remote controlled electrical switch system and how should it best be put to use?” To answer the question, delimitation was done to exploring Low Power Wide Area Network (LPWAN) link technologies, due to their prior use within power constrained devices.Long Range-radio, abbreviated LoRa, is a LPWAN radio modulation technique and was determined to be a good candidate as a suitable link technology for the remote electrical switch system. The range of LoRa is achieved by drastically lowering the data rate of the transmission, and is suitable for battery-powered or energy harvesting devices such as those found in the field of Internet of Things.A LoRa-based transmitter and receiver pair was implemented, and measured to have a packet delivery ratio of over 95% at a distance of 2 km, measured between two bridges. Data at further distances could not be accurately determined, because of the LoRa transceiver giving faulty readings.No conclusion could be made about the suitability for using a LoRa based system to solve the problem, partially due to an improper method for testing the radio performance was used, and partially due to an inconclusive measurement result.
Denna rapport utforskar designen av ett system för att fjärrstyrt slå på eller av elektronik över ett avstånd på minst 15 km, för att användas med batteridrivna radionoder för nätverksbryggning utomhus med Wi-Fi. Tillämpningsområdet för nätverksbryggorna är att koppla samman avlägsna nätverk, om Internetinfrastruktur skulle sluta fungera vid en nödsituation.Problemställningen för rapporten var ”Vad är en lämplig radiolänksteknik att använda i ett fjärrstyrt elektriskt strömbrytarsystem, och hur ska det bäst brukas?”. För att svara på frågan gjordes en avgränsning att utforska Low Power Wide Area Network (LPWAN)-länktekniker, på grund av deras tidigare användning inom effektbegränsade enheter.Long Range-radio, förkortat LoRa, är en radiomodulationsteknik som används för att skicka data över långa avstånd med energibegränsade enheter. LoRa:s räckvidd uppnås genom att drastiskt sänka datatakten, och lämpar sig för bruk i batteridrivna eller energiskördande enheter, likt de som återfinns inom fältet Internet of Things.Ett LoRa-baserat sändaroch mottagarpar implementerades, och uppmättes till att ha en paketlevereringsmängd på över 95% vid ett avstånd på 2 km, mätt mellan två broar. Data vid större avstånd kunde inte bli bestämt noggrant, eftersom LoRa transceivern gav felaktiga avläsningar. Ingen slutsats kunde göras för lämpligheten för att använda ett LoRa-baserat system för att lösa problemet, delvist för att en olämplig metod för att testa radions prestanda använts, och delvist på grund av ett ofullständigt mätresultat.

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Bordihn, Henning. "Contributions to the syntactical analysis beyond context-freeness." Thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2012/5971/.

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Parsability approaches of several grammar formalisms generating also non-context-free languages are explored. Chomsky grammars, Lindenmayer systems, grammars with controlled derivations, and grammar systems are treated. Formal properties of these mechanisms are investigated, when they are used as language acceptors. Furthermore, cooperating distributed grammar systems are restricted so that efficient deterministic parsing without backtracking becomes possible. For this class of grammar systems, the parsing algorithm is presented and the feature of leftmost derivations is investigated in detail.
Ansätze zum Parsing verschiedener Grammatikformalismen, die auch nicht-kontextfreie Sprachen erzeugen können, werden diskutiert. Chomsky-Grammatiken, Lindenmayer-Systeme, Grammatiken mit gesteuerten Ersetzungen und Grammatiksysteme werden behandelt. Formale Eigenschaften dieser Mechanismen als Akzeptoren von Sprachen werden untersucht. Weiterhin werden kooperierende verteilte (CD) Grammatiksysteme derart beschränkt, dass effizientes deterministisches Parsing ohne Backtracking möglich ist. Für diese Klasse von Grammatiksystemen wird der Parsingalgorithmus vorgestellt und die Rolle von Linksableitungen wird detailliert betrachtet.

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Söderlund, Sverker. "Performance of REST applications : Performance of REST applications in four different frameworks." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-64841.

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More and more companies use a REST architecture to implement applications for an easy to use API. One important quality attribute of an application is the performance. To be able to understand how the application will perform it is important to know how the selected framework perform. By testing the performance of different frameworks it will become easier for software developers to choose the right framework to achieve their requirements and goals. At the time when this paper was written the research in this area was limited. This paper answered the question of which framework between Express, .NET Core, Spring and Flask that had the best performance. To be able to know how frameworks performed the author needed to measure them. One way of measuring performance is with response time from the server. The author used a controlled experiment to collect raw data from which the results was drawn. The author found out that Spring had the best overall performance between the different categories. By analysing the results the author also found out that performance differed a lot between the frameworks in some categories.

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ZHANG, GUO-QING, and 張國清. "Design of personal computer controlled FES-cycling system." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/16325290290212668158.

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Kaplan, Halit. "A computer controlled system for earthquake protection of structures." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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Yeung, Chi-Ho. "A three-axis virtual computer numerical-controlled (CNC) system." Thesis, 2004. http://hdl.handle.net/2429/15510.

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The recent trend is to perform the machining operations in a comprehensive simulation environment before physical production. This thesis presents a virtual design and simulation of CNC machine tools with Cartesian drive configurations. The Virtual CNC system accepts reference toolpath generated on CAD/CAM systems in the form of industry standard Cutter-Location (CL) format. The CL file contains the cutter dimensions, toolpath coordinates, and travel speed in machining a particular part on a CNC machine tool. The motion commands are processed by considering the trajectory generation, control law, physical characteristics of feed drives, which describe the mathematical model of the selected CNC system. The Virtual CNC system consists of parametric modules, which can be either selected from the database or defined as a new module by the user. The trajectory generation modules include various feed profiles with low and high smoothness levels along the toolpath. The transfer functions of the individual physical elements in the drives, such as ball screw, gear reduction, inertia and viscous damping of the equivalent drive train, servomotor, motion sensors, and amplifiers are mathematically modeled based on the specifications. The non-linearities such as saturation of actuator, guideway friction, and backlash are also considered. The Virtual CNC system is furbished with experimentally proven various control laws, such as P-PI, PD, PID, Pole Placement Control (PPC), and Sliding Mode Control (SMC). The linear control laws are analytically tuned according to desired performance criteria. The non-linear SMC is tuned by developing a fuzzy logic based auto-tuning algorithm. A toolpath modification technique is also introduced for smoothening out the sharp corners with quintic splines whenever it is required. With this technique, the tracking performance of the machine tool is significantly improved as the feed direction changes continuously without stopping at the corners, resulting in less excitation to the drives. The Virtual CNC system processes the entire toolpath motion, provides a time-domain response of the entire feed drive control system by including the non-linearities, and predicts the tolerance violation locations along the toolpath. The system incorporating with auto-tuning and toolpath modification technique is experimentally verified in a 2-1/2 axis machining center.

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Chen, ChiaChih, and 陳家智. "Development of a Computer Controlled System for Plant Growth Chamber." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/58979298997800894726.

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碩士
國立臺灣大學
農業機械工程學系研究所
88
Growth chamber plays an important role in the research of plants. Most commercially available growth chambers can only control a few factors of the environment and have the inflexible human-machine interface. Even so, they are still expensive and have no data acquisition capability. The purpose of this research is to develop a computerized control and data acquisition system of a growth chamber. The system is developed using MS Visual Basic and capable of controlling temperature, humidity, light, and concentration of CO2. Besides the single-point setting, two-step setting, daily multi-step setting and long-duration-muti-step setting, the human-machine interface of the system also provides the acclimatization-curve setting. Users can setup the acclimatization curves in form of sine-wave or triangle-wave and adjust the amplitude of the curve easily. The system developed can greatly improve the performance of the commercially available growth chamber. Thus, making it highly marketable. More test runs are required to insure the stability of the system.

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FU, YA-MING, and 扶亞民. "A preliminary study on micro-computer controlled weighing and grading system for agricultural products." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/72804629596713753983.

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Dissertations / Theses on the topic 'Computer-controlled system'

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