Дисертації: "Hydraulic control Computer simulation"

1

Rouse, Matthew David. "Design and evaluation of a remote access hydraulic manipulator for system dynamics and controls education." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/18943.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Koeppen, Kyle Bruce. "Virtual access hydraulics experiment for system dynamics and control education." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15906.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Heinze, Alexander. "Modelling, simulation and control of a hydraulic crane." Thesis, Växjö University, School of Technology and Design, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1932.

Повний текст джерела

Анотація:

The objective of this thesis is to develop a model that represents the dynamics of a hydraulically operated forestry crane. The model was derived with the traditional Euler-Lagrange formalism and considers the crane mechanics, three double-acting hydraulic cylinders and the valve control unit. On the basis of the derived model we reproduced the entire crane model in MATLAB in order to run simulations herewith. This gave us the possibility to do parameter changes for further studies of the crane in motion.

Another major goal within the thesis work was to estimate cylinder friction of the hydraulic actuators. We built up a test rig and used double-acting cylinders for determing their frictional behaviour. For this, we ran open-loop experiments in order to create velocity-friction maps that represented the static friction force of the cylinders. In this concern, we varied system pressure and cylinder load to study their influence on the friction force. By means of the derived static friction maps we approached the cylinder’s dynamic friction behaviour and applied both step and ramp control inputs to examine the spring-damping characteristics of the microspoic bristles in the contacting area. The dynamic friction experiments have been exerted in the fashion of the LuGre model. As a result we acquired different nominal friction parameters that we necessarily used to develope adequate friction models.

A third objective of this thesis was to establish a crane-tip control. Instead of a traditional control, providing a direct relationship between joystick input and cylinder extension, the focus was to build up a control for the end-effector’s trajectory in a two-dimensional frame. This could be achieved by using inverse kinematics in order to determine the required joint angles that corresponded to the desired position of the crane-tip.

The work also contains a CD including all developed MATLAB models that have been written within this project.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Skjong, Stian. "Modeling, Simulation and Control of Hydraulic Winch System." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25578.

Повний текст джерела

Анотація:

In this thesis a hydraulic low pressure winch system has been modeled using bond graph theory. The hydraulic winch system is assumed to be installed on an offshore vessel affected by environmental forces and disturbances such as waves and currents. The hydraulic system powering the winch consists mainly of two pilot operated 3/3-directional valves controlled by two 4/3-directional valves and a hydraulic motor. The system also includes a pressure relief valve, check valves, pump systems, piping and filters. The 3/3-directional valves are the main focus in the model and are therefore modeled with less simplifications compared to the other subsystems. A thorough model study has been initiated to figure out the model limitations, sensitivity of model parameters and the ability to simplify the derived model without loosing essential dynamics and characteristics. The effects of variable bulk modulus and fluid inertia in the 3/3-directional valves have been studied by comparing different step responses and motor load characteristics. The observations and results from this model analysis laid the groundwork for control of the hydraulic motor. A clear relation between the main valve displacements and the motor velocity and torque in 4/3 valve configuration gave reasons to believe that manual motor control done by the winch operator through control of the valve displacements was possible. Adaptive PID controllers were used as inner controllers to control the control slides in the main valves. These controllers were later on replaced with PD-controllers when outer control was derived because the adaptive controllers tended to be a bit slow. Simplified state equations describing the motor dynamics were derived for control design purposes. The state equations extracted from the bond graph model showed high complexity, containing logic and discrete quantities, and were not suitable for control design. Model based speed- and torque controllers, based on sliding mode and backstepping control theory, were derived based on the simplified equations and implemented in the model. Different load cases were initiated to test the two controllers. A lumped wire-load model containing hydrodynamics, wire- and reel dynamics and environmental disturbances such as current and heave motions of the vessel were added in the total winch model to test the controllers in different operations with varying conditions and environments. The results from these controller tests gave reason to believe that a combination of these two controllers would be favourable in certain operations and would give increased safety in extreme cases such as stuck load and loss of load. The derived speed and torque controller were put into a hybrid controller framework and a switching algorithm was designed with focus on switching stability and wanted functionalities for the winch system. It was observed that switching stability and winch functionality were closely connected and different winch operations were essential in the design of the switching algorithm. Dwell time and tracking error switching were used as the main controller switching restrictions together with functionality based switching conditions. Different simulations were initiated to test the hybrid controller such as stuck load, loss of load and landing of a load at the sea floor. A Luenberger observer was derived to estimate the motor load and the motor velocity by using the simplified state equations and the differential pressure across the hydraulic motor as measurement in order to ensure redundancy in the control system and be able to control the hydraulic winch even though the decoder measuring the hydraulic motor velocity fails.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Durrant, Adrian Michael. "A computer-aided simulation of hydraulic tailings disposal." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/28025.

Повний текст джерела

Анотація:

Computer-aided tools appropriate to architecture, engineering and construction have been Summarised, including digital terrain modelling (DTM), computer-aided design and draughting (CADD) and database management systems (DBMS). DTM and CADD techniques have been applied to simulating the hydraulic filling of tailings, or mine waste dams. A relational DBMS was used to structure and manage filling and terrain data relevant to hydraulic tailings disposal at the Wheal Jane mine in Cornwall.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Beard, Gregory Stuart. "Adaptive control of energy efficient hydraulic systems." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266978.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Sepehri, Nariman. "Dynamic simulation and control of teleoperated heavy-duty hydraulic manipulators." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30846.

Повний текст джерела

Анотація:

Some relevant aspects of dynamics and control of heavy-duty hydraulic machines in a teleoperated mode were investigated. These machines, such as excavators and forest harvesters, are mostly used in primary industries. They have a manipulator-like structure with a nonlinear and coupled actuating system. The aim of the project is to investigate different approaches towards converting such machines, with minimum changes, into task-oriented human-supervisory control systems. This provides the opportunity to use both human supervision and robotic power in hazardous environments and for tasks for which human decision is necessary. A methodology was developed for fast and accurate simulations. Analytical, steady-state and numerical techniques were combined using Large-Scale Systems analysis. The inclusion of nonlinearities in the form of discontinuities (e.g., gear backlash and stick-slip friction) in the model was investigated. Numerical simplifications of the structural dynamics and alternative solutions for the hydraulic part were also studied. The model describing the performance of the machine has been written in ACSL (Advanced Continuous Simulation Language) on a VAX computer system. A modified version of the program is at present running close to real-time on a single processor in conjunction with high speed graphics in a manner similar to a flight simulator used for human interface studies and training. The model also evaluates the performance of the machine in a teleoperated mode and under different control strategies. As a result a velocity control algorithm has been developed which is applied in conjunction with the closed-loop components for teleoperation of heavy-duty hydraulic machines; it is basically a feedforward compensation which uses the measured hydraulic line pressures along with fluid-flow equations as criteria to control the joint velocities as well as to uncouple the interconnected actuating system. The control algorithm has been written in C language and is running on an IRONICS computer system, interfaced between the human operator and the machine. The simulation results are supported by the experimental evidence. The experiments were performed on a Caterpillar 215B excavator. Improved operator safety, extension of human capability, job quality and productivity increase are the advantages of a successful implementation of robotic technology to these industrial machines.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Colautti, Dennis. "Modelling meteorological and substrate influences on peatland hydraulic gradient reversals." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33734.

Повний текст джерела

Анотація:

A hydrological modelling effort using MODFLOW was undertaken in order to determine the relative importance of some of the factors influencing hydraulic gradient reversals in peatlands. Model domains were of two types, large raised bog type (LRBT) and kettle bog type (KBT), and were made to undergo various levels of meteorological forcing (water deficit). Substrate, too, was varied in order to determine its importance on reversals. Domain-wide reversals were successfully simulated in LRBT systems, but not in KBT systems. Although simulated flow patterns matched field-observed patterns, both pre- and post-drought, simulated reversals occurred more quickly than in the field. This may be due to insufficiently distributed parameters, such as hydraulic conductivity. Reversals were easily terminated by simulating non-drought conditions. In the LRBT system, reversal duration decreased, and time-to-reversal increased, with a decrease in drought severity. Increasing drought severity in KBT systems had the opposite effect on the duration of semi-reversed flow patterns, suggesting a possibly different/additional mechanism for flow reversals in KBT systems. Hydraulic conductivity had an appreciable effect on flow reversal evolution, though neither changing porosity, nor differences in catotelm layering had a great effect.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Jaffe, Peter Carl Lefren 1974. "Force-directed control with a strong hydraulic manipulator." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80215.

Повний текст джерела

Анотація:

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
Includes bibliographical references (leaves 68-73).
by Peter Carl Lefren Jaffe.
M.Eng.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Wu, Gang. "Adaptive position and force control of hydraulic robots, theory, simulation and experiments." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23554.pdf.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Sidders, John Anthony. "The use of computer simulation as a design tool for thermal hydraulic systems." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268191.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Svensson, Oskar. "Electrohydraulic Power Steering Simulation : Dynamic, thermal and hydraulic modelling." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265674.

Повний текст джерела

Анотація:

There are several benets of electrohydraulic power steering systems, as compared to hydraulicpower steering systems where the pump is driven directly by the engine of the vehicle. Someof these benets are increased eciency and improved steering performance. The purpose ofthis project is to create a simulation model of the electrohydraulic power steering system inSimulink, excluding the hydraulic circuit. The model should thus consist of the electric motor,the drive electronics, the control system, the hydraulic pump as well as the communication andinterface to the master simulation system in which the model will be used.As a start a mathematical model of the motor is derived. Then the motor controller includingtwo current controllers and a speed controller is developed. The switching signals for the threephase bridge that drives the motor are calculated using space vector modulation. The motordrives a hydraulic pump, which is modeled using data sheet eciency curves. Finally a thermalmodel of the drive is developed. To fulll real time requirements, a lumped parameter approachis chosen. The nal model is exported as a Functional Mock-up Unit, which is a black-boxencapsulation of the complete simulation model.The simulation model is compared to measurement data to conrm its validity. Thesecomparisons shows that the dynamic response of the motor and its controller are close to themeasured values and that the thermal model adequately corresponds to the thermal tests. Thehydraulic pump model varied from measurements more than the other sub-modules. It was,however, seen as acceptable. Overall the system response was satisfactory, but naturally a lotof future improvements and new features could be made to improve the model.
Det finns flera fördelar med elektrohydraulisk servostyrning, där hydraulpumpen drivs av en el-motor, jämfört med hydraulisk servostyrning, där pumpen drivs direkt av fordonets förbränningsmotor. Några av dessa fördelar är ökad effektivitet och förbättrad styrprestanda. Syftet med detta projekt är att skapa en Simulink-modell av ett elektrohydraulisk system för servostyrning, exklusive hydraulkretsen. Modellen ska alltså bestå av delmodeller för elmotorn, drivelektroniken, styrsystemet, hydraulpumpen samt kommunikation med den övergripande simuleringsplattformen.Inledningsvis beskrivs en matematisk modell av elmotorn och efter det utvecklas motorstyrningen, bestående av två strömregulatorer samt en hastighetsregulator. Spänningen från strömregulatorerna uppnås genom space vector-modulation, som beräknar de pulskvoter som krävs för att uppnå denna spänning. Elmotorn driver en pump. Denna pump modelleras med hjälp av data från pumpens datablad. Slutligen modelleras drivelektronikens termiska egenskaper med ett termiskt nätverk. Den slutliga modellen omsluts av en Functional Mock-up Unit somintegreras i den övergripande simuleringsplattformen.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Kontz, Matthew Edward. "Haptic Control of Hydraulic Machinery Using Proportional Valves." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19876.

Повний текст джерела

Анотація:

Supplying haptic or force feedback to operators using hydraulic machinery such as excavators has the potential to increase operator capabilities. Haptic, robotic, human-machine interfaces enable several enhancing features including coordinated motion control and programmable haptic feedback. Coordinated or resolved motion control supplies a more intuitive means of specifying the equipment's motion. Haptic feedback is used to relay meaningful information back to the user in the form of force signals about digging force acting on the bucket, programmable virtual constraints and system limitations imposed by the mechanism, maximum pressure or maximum flow. In order to make this technology economically viable, the benefits must offset the additional cost associated with implementation. One way to minimize this cost is to not use high-end hydraulic components. For smaller backhoes and mini-excavators this means that the hydraulic systems are comprised of a constant displacement pump and proportional direction control valves. Hydraulic and haptic control techniques suitable for backhoes/excavators are developed and tested on a small backhoe test-bed. A virtual backhoe simulator is created for controller design and human evaluation. Not only is the virtual simulator modeled after the test-bed, but the control algorithm used in the simulator is the same as the actual backhoe test-bed. Data from human subject tests are presented that evaluate the control strategies on both the real and virtual backhoe. The end goal of this project is to incorporate coordinated haptic control algorithms that work with low-cost systems and maximize the enhancement of operator capabilities.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Glover, Peter Benedict Myers. "Computer simulation and analysis methods in the development of the hydraulic ram pump." Thesis, University of Warwick, 1994. http://wrap.warwick.ac.uk/66359/.

Повний текст джерела

Анотація:

The purpose of this study was primarily to promote the wider deployment of the hydraulic ram pump, and secondarily to provide the technical input into a programme aimed at using hydraulic ram pump technologies for third world development. Hitherto hydraulic ram pump technologies have been restricted by poor understanding of operational parameters, poor performance prediction, and poor design of pumps and installations. In pursuit of greater understanding the work utilised a computer simulation developed by the author as part of a previous research programme. This simulation was then greatly enhanced to provide improved accuracy and functionality. The enhanced simulation was then used to provide significant insight into the operation of a hydraulic ram pump and subsequently used to identify design improvements for the hydraulic ram pump. The simulation was used to investigate operational restrictions on the hydraulic ram, and was ultimately use to develop a model of hydraulic ram pump operation. The model of operation developed by the use of the simulation was computerised and used to predict the performance of hydraulic ram pump installations. This computerised model was then used to provide the most comprehensive design charts yet created for hydraulic ram pump, and was also used in the investigation of operational limits for the device. The study represents: the development of the first detailed simulation of the hydraulic ram pump and the most significant insight to date into the detail of operation of a hydraulic ram pump. The result of the study is the provision of an accurate method of pump calibration, an accurate method of pump performance prediction, and the first comprehensive design charts to be produced for the hydraulic ram pump.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Tsai, Chi-Keng. "Computer control of an electro-hydraulic robot leg with proximity ranging system /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260135355525.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Peskin, Jonah T. (Jonah Timothy) 1977. "Force control of electro-hydraulic actuators in an underwater fish-like vehicle." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86874.

Повний текст джерела

Анотація:

Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
Includes bibliographical references (p. 60-61).
by Jonah T. Peskin.
M.Eng.and S.B.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Hochwallner, Martin. "On Motion Control of Linear Incremental Hydraulic Actuators." Doctoral thesis, Linköpings universitet, Industriell Produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-142264.

Повний текст джерела

Анотація:

Linear Incremental Hydraulic Actuators combine one or more short-stroke cylinders, and two or more engaging/disengaging mechanisms into one actuator with long, medium, or even unlimited stroke length. The motion of each single short-stroke actuator concatenated by the engaging/disengaging mechanisms forms the motion of the linear incremental hydraulic actuator. The patterns of how these motions are concatenated form the gaits of a specific linear incremental hydraulic actuator. Linear incremental hydraulic actuators may have more than one gait. In an application, the gaits may be combined to achieve optimal performance at various operating points. The distinguishing characteristic of linear incremental hydraulic actuators is the incremental motion. The term incremental actuator is seen as analogous to the incremental versus absolute position sensor. Incremental actuators realize naturally relative positioning. Incremental motion means also that the behavior does not depend on an absolute position but only on the relative position within a cycle or step. Incremental actuators may realize discrete incremental or continuous incremental motion. Discrete incremental actuators can only approach discrete positions, whereby stepper drives are one prominent example. In contrast, continuous incremental actuators may approach any position. Linear electric motors are one example of continuous incremental actuators. The actuator has no inherent limitation in stroke length, as every step or cycle adds only to the state at the beginning of the step or cycle and does not depend on the absolute position. This led to the alternative working title Hydraulic Infinite Linear Actuator. Linear incremental hydraulic actuator provides long stroke, high force, and linear motion and has the potential to decrease the necessary resource usage, minimize environmental impact, e.g. from potential oil spillage, extend the range of feasible products: longer, stiffer, better, etc. This thesis presents an analysis of the characteristics and properties of linear incremental hydraulic actuators as well as the gaits and possible realizations of some gaits. The gait for continuous, smooth motion with two cylinders is comprehensively studied and a control concept for the tracking problem is proposed. The control concept encapsulates the complexity of the linear incremental hydraulic actuator so that an application does not have to deal with it. One other gait, the ballistic gait, which realizes fast, energy-efficient motion, enabling energy recuperation is studied.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Solomon, Luiza. "Learning and flow control in optimistic simulation." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29475.

Повний текст джерела

Анотація:

This thesis has two main contributions. The first contribution is the development of a modular, easy-to-use Time Warp simulation engine targeted towards distributed-memory environments. The second contribution is the analysis and experimental verification of the performance of the flow control algorithm proposed by Choe in a distributed-memory environment.
The Time Warp simulation engine TWSIM provides our laboratory with a research medium for Time Warp simulations in a distributed-memory environment such as a network of workstations. The modular design of TWSIM allows for easy integration of any new simulation application and for fast testing of optimizations and improvements to the Time Warp mechanism. Its compact size and object-oriented implementation using the C++ programming language result in a short learning curve for future users and developers.
The flow control algorithm proposed by Choe was implemented and analyzed with the aid of the TWSIM simulation engine. The algorithm makes use of stochastic learning automata to balance simulations loads by continuously regulating the flow of events between processors during the course of the simulation. Three different load metrics are considered: memory usage, virtual time, and a space-time product of the first two metrics. The algorithm was tested with two different simulation applications: a queuing network simulation and a Personal Communication Services (PCS) simulation. Results show that the flow control algorithm reduces the memory usage; the number of rollbacks and the number of antievents at the expense of the simulation time. As well, it becomes apparent that the behaviour of the flow control algorithm is not a consequence of learning.
Finally, we discuss a number of approaches to learning and flow control using the outlines of the flow control algorithm, and we consider the extent of the performance improvement to be expected from memory-based schemes for limiting Time Warp optimism in a distributed-memory environment.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Reichenwallner, Christopher, and Daniel Wasborg. "Control of a Hydraulic Hybrid System for Wheel Loaders." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158902.

Повний текст джерела

Анотація:

In recent years many companies have investigated the use of hybrid technology due to the potential of increasing the driveline’s efficiency and thus reducing fuel consumption. Previous studies show that hydraulic hybrid technology can be favourable to use in construction machinery such as wheel loaders, which often operate in repetitive drive cycles and have high transient power demands. Parallel as well as Series hybrid configurations are both found suitable for wheel loader applications as the hybrid configurations can decrease the dependency on the torque converter. This project has investigated a novel hydraulic hybrid concept which utilizes the wheel loaders auxiliary pump as a supplement to enable both Series and Parallel hybrid operation. Impact of accumulator sizes has also been investigated, for which smaller accumulator sizes resembles a hydrostatic transmission. The hybrid concept has been evaluated by developing a wheel loader simulation model and a control system based on a rule-based energy management strategy. Simulation results indicate improved energy efficiency of up to 18.80 % for the Combined hybrid. Moreover, the accumulator sizes prove to have less impact on the energy efficiency. A hybrid system with decreased accumulator sizes shows improved energy efficiency of up to 16.40 %.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Zhang, Yang. "Study of central control actions in computer simulation." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/6456.

Повний текст джерела

Анотація:

The Canadian government identified the reliability of public urban transit systems and the improvement of customer services as a priority. Therefore, in 1997, Transport Canada and the Regional Municipality of Ottawa-Carleton have set up a project called the "Bus Priority System Project" to enhance the capabilities of the existing OPSSIM simulation model in order to satisfy these requirements. The enhancement of the simulation model would allow for the training of controllers, as well as for the evaluation of new control strategies. This thesis describes a part of the project. It works on the design, research, investigation and implementation of a Central Control Action Module, and on the design and implementation of a user-friendly Run Time Bus Progress Screen. A brief user guide describing how to use these new features is also included in the thesis for the benefit of potential users. In the conclusion, overviews for future research are identified.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Chen, Lule. "Study of bus control strategies by computer simulation." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/6654.

Повний текст джерела

Анотація:

In this thesis, a simulation model used to simulate the running of buses on a single route, OC Transpo route 95, is studied. The model is implemented on a platform different from its original design at the University of Ottawa, and validation experiments are performed. For the most part, the model seems valid, although some additional calibration is recommended. New headway-based bus control strategies are presented and compared with other known control strategies. The statistical analysis and comparisons of those control strategies are based on the testing results obtained from the simulation model. The new headway control policies (called "Message Board" and "hybrid" policies) are shown to provide better service reliability in terms of less variable headway for the high-frequency route 95. Finally, a prototype of a knowledge-based system for real-time bus control purposes is developed and tested on the simulation model. The prototype is shown to be an interesting alternative for real-time bus control: it can effectively interface with the simulation model and perform real-time service control. This prototype will be a building block in the development of a more complete knowledge-based system capable of implementing more complex real-time service control policies in the hope of providing assistance to human controllers.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Cruz, Eva Brunilda. "Simulation of computer control strategies for column flotation." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/46104.

Повний текст джерела

Анотація:

System identification techniques were applied to obtain mathematical expressions relating column flotation operating parameters. The empirical data were derived by making individual step changes in tailings rate, wash water rate, feed rate, frother addition and air rates, while measuring the pulp level and air holdup responses. The dynamic behavior of the flotation column is also analyzed for the conditions at which the tests were perfonned. After converting these mathematical equations into continuous and discrete transfer function matrices, several control algorithms were simulated on this column flotation empirical representation. Suggestions are provided to deal with the complexities of the process when designing a control scheme.
Master of Science

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Wondimu, Nahom Abebe. "SIMULATED AND EXPERIMENTAL SLIDING MODE CONTROL OF A HYDRAULIC POSITIONING SYSTEM." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145419922.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Vincent, Robert Durham. "Detection, simulation and control in models of epilepsy." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18684.

Повний текст джерела

Анотація:

We investigate the application of machine learning methods for the detection and control of seizure-like behavior in in vitro models of epilepsy. This research will form the basis for a new class of adaptive neurostimulation devices for the treatment of drug-resistant cases of epilepsy in humans. There are many technical obstacles to creating an adaptive control algorithm for these devices. At present, science has an incomplete understanding of the mechanisms and dynamics underlying both epilepsy and its treatments. This is reflected both in the long-standing problem of the detection or prediction of seizures and in the lack of clear criteria for optimizing an adaptive control algorithm. As in many medical problems, clinical data is sparse, expensive, and highly variable. We address the detection of epileptic states using boosted ensemble methods with a set of simple frequency spectrum features derived from electrophysiological recordings. While typical boosting methods are not designed for use with time series data, we present a recurrent boosting method that improves classification accuracy in our application domain. We also present an implementation of a biologically plausible model of epileptic neural tissue using a network of integrate and fire neurons with partially stochastic inputs and two time scales of refractory behavior. Finally, we train a reinforcement learning agent to control the dynamics of this network, reducing the occurrence of seizure-like events. This agent is intended to be a component of a closed-loop electrical stimulation device with a set of sensors and an adaptive stimulation strategy.
Nous étudions l'application des méthodes d'apprentissage automatique pour la détection et le contrôle d'activité semblable à une crise convulsive dans les modèles d'épilepsie in vitro. Cette recherche formera la base d'une nouvelle classe de dispositifs de neurostimulation auto-adaptatifs pour le traitement des patients qui ne répondent pas aux drogues antiépileptiques. Il y a beaucoup d'obstacles techniques pour créer un algorithme adaptatif pour ces dispositifs. Actuellement, la science n'a pas encore expliqué entièrement les mécanismes définissant l'épilepsie et ses traitements. Ceci est important à deux niveaux: Pour le problème de la détection ou de la prévision des crises, et pour établir des critères clairs pour optimiser un algorithme de contrôle adaptatif. Comme beaucoup de problèmes médicaux, les données cliniques sont rares, chères, et fortement variables. Nous adressons la détection des états épileptiques en utilisant les méthodes “boosting” avec un groupe de traits simples de spectre de fréquences dérivés des enregistrements électrophysiologiques. Tandis que les méthodes boosting typiques n'ont pas été conçues pour utiliser l'information disponible avec des données de séries chronologiques, nous présentons une méthode boosting récurrente qui améliore le taux de classification dans notre domaine d'application. Nous présentons également une exécution d'un modèle biologiquement plausible d'un système neural épileptique employant un réseau de neurones intègre-et tire ayant les signals d'entrées partiellement stochastiques et ayant deux échelles de temps de comportement réfractaire. En conclusion, nous formons un agent d'apprentissage par renforcement pour réduire l'occurrence d'activité semblable à une crise. Cet agent est prévu pour être une composante d'un dispositif en boucle fermée de stimulation électrique ayant un ensemble de capteurs et un algorithme adaptatif.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Malchano, Matthew David 1980. "Biologically-plausible six-legged running : control and simulation." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29695.

Повний текст джерела

Анотація:

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
Includes bibliographical references (p. 63-66).
This thesis presents a controller which produces a stable, dynamic 1.4 meter per second run in a simulated twelve degree of freedom six-legged robot. The algorithm is relatively simple; it consists of only a few hand-tuned feedback loops and is defined by a total of 13 parameters. The control utilizes no vestibular-type inputs to actively control orientation. Evidence from perturbation, robustness, motion analysis, and parameter sensitivity tests indicate a high degree of stability in the simulated gait. The control approach generates a run with an aerial phase, utilizes force information to signal aerial phase leg retraction, has a forward running velocity determined by a single parameter, and couples stance and swing legs using angular momentum information. Both the hypotheses behind the control and the resulting gait are argued to be plausible models of biological locomotion.
by Matthew David Malchano.
M.Eng.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Yilmaz, Metin. "Control Of Groundwater By Underground Dams." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1259621/index.pdf.

Повний текст джерела

Анотація:

In this study underground dams are briefly described and detailed information about the design and construction aspects is provided. Since the material, of which dam wall is composed, is the main variable influencing the groundwater behavior, various types of dam wall are discussed. The use and usefulness of the underground dams as a means of sustainable development, and their performance in the management of groundwater resources are analyzed with the help of two example studies. In the first example a hypothetical idealized aquifer is considered, while in the second one, a real aquifer is selected. For the performance evaluation, and for the analysis of the impact of the underground dams on the groundwater behavior, numerical simulation is opted. For that purpose, a well-known computer code, MODFLOW, A Modular Three-Dimensional Finite Difference Groundwater Flow Model of U.S. Geological Survey, (McDonald and Harbaugh, 1988) is used.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Xiong, Xiao-Jin. "Modeling, control and computer simulation of a rotating Timoshenko beam." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0018/NQ44632.pdf.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Xiong, Xiao-Jin. "Modeling, control and computer simulation of a rotating Timoshenko beam." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35652.

Повний текст джерела

Анотація:

In this work, we develop a mathematical model for a rotating Timoshenko beam, and then show its well-posedness. Further, we prove the exact controllability of its linearized model under different sets of controllers. Finally, we work out a computer simulation system for linear as well as nonlinear control problems.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Girard, Michael. "The computer animation of legged animals : simulation, design and control /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487598748016958.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Chayopitak, Nattapon. "Network-oriented simulation of variable reluctance motor with PWM control." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/15457.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

31

League, Richard B. "Bond graph model and computer simulation of a hydrostatic drive test stand." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50042.

Повний текст джерела

Анотація:

A hydrostatic drive test stand was constructed to aid in the instruction of the characteristics of hydrostatic transmissions and to develop a time-varying load in a shaft to compare torque transducers. A mathematical model of the device was derived using the bond graph approach and was implemented using the Advanced Continuous Simulation Language (ACSL). The test stand was used to obtain experimental data to try to refine the model parameters. To facilitate the measurement of system flows, a microprocessor-based digital flow indicator was developed. Steady-state tests were performed at various constant pump swashplate angles; for the dynamic tests, the pump swashplate angle was cycled from zero degrees to 6.5 degrees.
Master of Science
incomplete_metadata

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Brogan, David C. "Simulation levels of detail for control and animation." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/8142.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Vesanterä, Pentti Juhani 1955. "Qualitative simulation: A tool for global decision making." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/291407.

Повний текст джерела

Анотація:

As a decision making aid for the human operator of a highly automated, complex system, qualitative modeling is presented as a tool to mimic the human global assessment process by learning from the system behavior. Such qualitative model is applied to reason about the behavior of a quantitatively simulated aircraft model, to determine on-line when a malfunction occurs in the quantitative model, to hypothesize about the nature of this malfunction, and to suggest a global strategy that would allow to operate (control) the quantitative aircraft under the modified flying conditions. Such an algorithm could be utilized as an addition to a conventional autopilot which would allow it to remain operational after a malfunction has taken place.

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Shimizu, Juri, Takuya Otani, Kenji Hashimoto, and Atsuo Takanishi. "Simulation of an interlocking hydraulic direct-drive system for a biped walking robot." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71091.

Повний текст джерела

Анотація:

Biped robots with serial links driven by an electric motor experience problems because the motor and transmission are installed in each joint, causing the legs to become very heavy. Previous solutions involved robots using servo valves, a type of highly responsive proportional valve. However, high supply pressure is necessary to realize high responsiveness and the resulting energy losses are large. To address this problem, we proposed a hydraulic direct-drive system in which the pump controls the cylinder meter-in flow, while a proportional valve controls the meter-out flow. Furthermore, our hydraulic interlocking drive system connects two hydraulic direct-drive systems for biped humanoid robots and concentrates the pump output on one side cylinder. The meter-in flow rate of the other side cylinder is controlled by the meter-out flow rate of the cylinder on which the pump is concentrated. A comparison of the walking simulation performance with that of the conventional independent system shows that our proposed system reduces the motor output power by 24.3%. These results prove the feasibility of constructing a two-legged robot without having to incorporate highly responsive servo valves.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Petry, Matthias, Olivier Reinertz, and Hubertus Murrenhoff. "Development of a Simulation Model of a Self-Energizing Hydraulic Brake to Actively Compensate Brake Torque Oscillations." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199896.

Повний текст джерела

Анотація:

Friction force oscillations caused by changing properties of the contact zone between brake disc and pad are well known from various applications. Resulting effects like brake judder are known phenomena in brake technologies and in the scope of various scientific work. A new measure to potentially reduce brake torque oscillations is the active compensation with the use of the control system of a self-energizing hydraulic brake (SEHB). New in comparison to traditional disc brakes is the fact that the brake torque is measured by the pressure in an additional supporting cylinder. Thus, the brake system is able to work in brake torque control mode. Within this paper a dynamic simulation model of the SEHB is shown and evaluated with measurement data achieved from a full scale test rig for railway applications. Based on the simulation model a pressure control strategy is developed to minimize brake torque oscillations of lower frequencies. The control parameters of the simulation are transferred to the experimental setup. Finally, simulation and experimental results are compared. Future work will deal with the development of control strategies to additionally minimize brake torque oscillations of the higher dynamics.

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Joy, Dawn, and Karthik Sekaran. "Electronic Pump Control and Benchmarking of Simulation Tools : AMESim and GT Suite." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69567.

Повний текст джерела

Анотація:

Load sensing pumps in hydraulic system of wheel loaders helps in increasing the energy efficiency of wheel loaders. Present day machines have hydro mechanical load sensing system. After the advent of hydro mechanical load sensing concept, over the years, lots of research has been carried out relevant to electro hydraulic load sensing, trying to control the pump electronically. Currently, Volvo Construction Equipments (VCE) is interested in investigating the possibility of implementing electro hydraulic load sensing system in the wheel loaders. Research works has shown existence of several configurations of electro hydraulic load sensing pumps. Successful simulation results of an electro hydraulic load sensing pump configuration would provide a backing for the proposal of building and testing that configuration of electro hydraulic load sensing pump prototype. Also, the thesis work aims in benchmarking hydraulic system simulation capabilities of AMESim and GT- Suite by simulating the existing hydro mechanical load sensing system in both in both the simulation packages.
The thesis work has been carried out at Virtual Product Development (VPD) division of Volvo Construction Equipments (VCE), Eskilstuna, Sweden.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Harischandra, Nalin. "Computer Simulation of the Neural Control of Locomotion in the Cat." Licentiate thesis, Stockholm : Numerisk analys och datalogi, Numerical Analysis and Computer Science, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4692.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Asghar, Muhammad Nadeem. "Computer simulation of salinity control by means of an evaporative sink." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318173.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Molenaar, Robert. "Design and implementation of biosystem control and tools for biosystem simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0017/NQ44519.pdf.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Luke, Neville. "Space-time modelling and simulation of multipass processes within a modern computer environment." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301812.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Ebrahimi, S. Morteza K. "Dynamic modelling and simulation of a CNC milling machine." Thesis, Cardiff University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287909.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Von, Raubenheimer Albert Ludwich. "Strategic supply chain management using simulation." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-12012005-092956/.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Ericsson, Niclas. "Improving Development of Communication Software in Industrial Control Systems using Simulation." Licentiate thesis, Mälardalens högskola, Inbyggda system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-37212.

Повний текст джерела

Анотація:

In the industrial domain customers expect a product longevity of 10-20 years, with high reliability and availability. Since industrial distributed control systems often are safety critical, aspects such as determinism, low latency and jitter are crucial. More and more industrial systems are becoming connected to the Internet, since end customers are requiring e.g. business intelligence and diagnostic information, anywhere at any time. Industrial systems that traditionally have been isolated are now facing entirely new challenges that will require new competences and ways of working. Introducing a new type of network in the industrial domain is a big investment, with high risks, often lacking known best practices. Time to market with sufficient quality is of high importance. A lot of time is spent on isolated activates, such as, simulations, updating tools, collecting requirements, design, coding, debugging, documentation, creating testbeds, validation and reviews. Therefore, there is a need to improve the efficiency when moving between the research and development phases for several reasons, e.g., integrate innovative research findings into industrial systems, shorten time to market, and improve product quality. This thesis focuses on improving efficiency during research and development of communication software. First, network evaluation methods are studied, and key industrial challenges are identified. For example, despite a huge research effort on network simulators and virtualization, there are still challenges that need to be addressed, in order for increased industrial benefits. Secondly, this thesis propose a flexible communication stack design that supports different run-time behaviors, from real-time operating system to bare-metal systems without an operating system, and different types of communication protocols, from real-time to non-real-time. Finally, this thesis propose a set of key features from network simulators, that are implemented and used as a case study in a research project. These contributions lead to simplification and increased automation, hence reducing the amount of manual work during research and development.
Inom industrin förväntar sig slutkunderna att produkterna har en livslängd på 10–20 år med hög tillförlitlighet och tillgänglighet. De flesta industriella styrsystem automatiserar säkerhetskritiska processer. Detta gör att aspekter som förutbestämt beteende med små fördröjningar och variationer är avgörande för att skydda person, miljö och egendom. Trender som den nya digitaliseringen, sakernas internet, molnet, 5G, maskininlärning och artificiell intelligens, bidrar till att antalet styrsystem som ansluts till Internet ökar. Ökningen beror mycket på att slutkunder börjar förvänta sig nya tjänster, samt tillgång till affärs- och diagnostikinformation även utanför arbetsplatserna. Att introducera nya kommunikationslösningar inom industrin är ofta en stor investering. Riskerna är oftast höga samtidigt som befintliga kommunikationsteknologier och protokoll behöver stödjas även i framtiden. Att få ut produkterna snabbt på marknaden med bibehållen kvalitet är av stor betydelse. Under forsknings- och utvecklingsarbete spenderas mycket tid på isolerade aktiviteter som till exempel simuleringar, uppdateringar av verktyg, insamling av krav, design, programmering, felsökning, dokumentation, testning och granskningar. Att snabbt byta mellan dessa aktiviteter är ofta inte helt enkelt, på grund av att olika metoder och verktyg inte automatiskt kan utbyta eller överföra information. Fokus i denna avhandling är att förbättra effektiviteten vid forskning och utveckling av kommunikationsmjukvara. Effektiviteten är viktig av flera skäl, till exempel att snabbt integrera nya och innovativa forskningsresultat, snabbare nå marknaden med produkter och förbättra produktkvalitet. Initialt studeras olika metoder för att utvärdera kommunikationsfunktionalitet. Metodernas användbarhet kartläggs i förhållande till aktiviteter under forsknings- och utvecklingsarbete, samt viktiga industriella utmaningar identifieras. Trots stora forskningsinsatser inom nätverkssimulatorer, emulatorer och virtualisering, så finns det fortfarande utmaningar kvar för ökad användbarhet och nytta inom industrin. Vidare föreslås en flexibel kommunikationsstackdesign som stöder olika typer av egenskaper och implementationer, från realtidsoperativsystem till enheter helt utan operativsystem, samt olika typer av kommunikationsprotokoll, från realtid till icke-realtid. Slutligen föreslås en reducerad uppsättning nyckelfunktioner till nätverkssimulatorer, vilka implementerats och använts i en fallstudie i ett forskningsprojekt. Dessa bidrag tillsammans medför en förenkling och ökad automatisering vilket gör att mängden manuellt arbete minskar under forsknings- och utvecklingsarbete.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Boner, Kevin Eugene 1961. "Command control system modeling for evaluating readiness." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276835.

Повний текст джерела

Анотація:

The objective of this research was to develop a framework whereby the United States Naval Surface Forces could be provided with better information to determine their overall readiness capability. This study utilized the new Readiness Assessment and Reporting Standard (S9410-AN-STD-010/AEGIS) as a guide. Also, a System Design Methodology was used as a tool to develop mathematical models for generating the readiness capability for a particular system. The specific system selected for demonstrating this framework was the Gun Weapon System (GWS) being developed for the Arleigh Burke DDG-51 Class Destroyer.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Chow, Alex Chung-Hen. "A generic user interface for hierarchical knowledge-based simulation and control systems." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185303.

Повний текст джерела

Анотація:

Successful design of the user interface for an interactive system must be sensitive to activities supported by the software and the time users spend in these activities. This dissertation presents a systematic approach to user interface design based on this idea. A control flow model for the interaction between the human and the application is developed and serves as the framework for the proposed approach. Sub-models of the control flow model correspond to actual programming modules and determine the logical system design sequence. The System Entity Structure language is employed to span hierarchical spaces. User interface design is based on the space dimensions of the System Entity Structure pruning process. A Virtual Tree Environment is developed on the TI Explorer to provide a programming facility for implementing user-interfaces. Following the proposed methodology, a system designer can give users an efficient user interface to applications that can be hierarchically described by the System Entity Structure language. The concept can also be implemented on other window systems such as Microsoft Windows and X-windows.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Cornwall, Maxwell W. "MEEBS a model for multi-echelon evaluation by simulation /." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA237099.

Повний текст джерела

Анотація:

Thesis (M.S. in Management)--Naval Postgraduate School, June 1990.
Thesis Advisor(s): McMasters, Alan W. ; Bailey, Michael P. "June 1990." Description based on signature page as viewed on October 21, 2009. DTIC Identifier(s): Computerized simulation, logistics management. Author(s) subject terms: Multi-echelon, simulation, SLAM II, models. Includes bibliographical references (p. 142-147). Also available in print.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Guo, Yisong. "Using Agent-Based Models to Understand Multi-Operator Supervisory Control." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/2970.

Повний текст джерела

Анотація:

As technology advances, many practical applications require human-controlled robots. For such applications, it is useful to determine the optimal number of robots an operator should control to maximize human efficiency given different situations. One way to achieve this is through computer simulations of team performance. In order to factor in various parameters that may affect team performance, an agent-based model will be used. Agent-based modeling is a computational method that enables a researcher to create, analyze, and experiment with models composed of agents that interact within an environment [12]. We construct an agent-based model of humans interacting with robots, and explore how team performance relates to different agent parameters and team organizational structures [21]. Prior work describes interaction between a single operator and multiple robots, while this work includes multi-operator performance and coordination. Model parameters include neglect time, interaction time, operator slack time, level of robot autonomy, etc. Understanding the parameters that influence team performance will be a step towards finding ways to maximize performance in real life human-robot systems.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Kencke, David Leighton. "Simulation and control of secondary electron programming in flash EEPROM's /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Franklin, Gene C. "Computer simulation of a cruise missile using brushless DC motors fin control." Thesis, Monterey, California. Naval Postgraduate School, 1985. http://hdl.handle.net/10945/21215.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Silva, Marco Jorge Tome da. "Simulation of human motion data using short-horizon model-predictive control." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43041.

Повний текст джерела

Анотація:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
Includes bibliographical references (p. 52-56).
Many data-driven animation techniques are capable of producing high quality motions of human characters. Few techniques, however, are capable of generating motions that are consistent with physically simulated environments. Physically simulated characters, in contrast, are automatically consistent with the environment, but their motions are often unnatural because they are difficult to control. We present a model-predictive controller that yields natural motions by guiding simulated humans toward real motion data. During simulation, the predictive component of the controller solves a quadratic program to compute the forces for a short window of time into the future. These forces are then applied by a low-gain proportional-derivative component, which makes minor adjustments until the next planning cycle. The controller is fast enough for interactive systems such as games and training simulations. It requires no precomputation and little manual tuning. The controller is resilient to mismatches between the character dynamics and the input motion, which allows it to track motion capture data even where the real dynamics are not known precisely. The same principled formulation can generate natural walks, runs, and jumps in a number of different physically simulated surroundings.
by Marco da Silva.
S.M.

Стилі APA, Harvard, Vancouver, ISO та ін.

Дисертації з теми "Hydraulic control Computer simulation"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями