Дисертації з теми "Bifurcation based guidance design"
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1
Moon, Jongki. "Mission-based guidance system design for autonomous UAVs." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31797.
Повний текст джерелаАнотація:
Thesis (Ph.D)--Aerospace Engineering, Georgia Institute of Technology, 2010.Committee Chair: Prasad, JVR; Committee Member: Costello, Mark; Committee Member: Johnson, Eric; Committee Member: Schrage, Daniel; Committee Member: Vela, Patricio. Part of the SMARTech Electronic Thesis and Dissertation Collection.
2
Seyedamin, Arvand. "FINDING IMPORTANT FACTORS IN AN EFFECTS-BASED PLAN USING SEQUENTIAL BIFURCATION." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101212.
Повний текст джерелаАнотація:
After the pilot phase of a simulation study, if the model contains many factors, then direct experimentation may need too much computer processing time, therefore the purpose of screening simulation experiments is to eliminate negligible or unimportant factors of a simulation model in order to concentrate the efforts upon a short list of important factors. For this matter the Sequential bifurcation procedure developed by Bettonvil and Kleijnen [3] is an efficient and effective screening method which can be used. In this study, the Sequential bifurcation screening method is used to determine the important factors of a simulation based decision support model designed by The Swedish Defense Research Agency (FOI) meant for testing operational plans. By using this simulation model, a decision maker is able to test a number of feasible plans against possible courses of events. The sequential bifurcation procedure was applied and sorted the most important factors involved in this simulation model based on their relative importance.
3
Macredie, Robert Duncan. "Principled design guidance for the development of computer-based training materials." Thesis, University of Hull, 1993. http://hydra.hull.ac.uk/resources/hull:10693.
Повний текст джерелаАнотація:
This study is concerned with the provision of guidance for designers of computer-based training (CBT) materials. Four interrelated principles - immersion, interaction, locative fit, and multiple representations - are discussed. These principles draw upon research into instruction and technology and re-frame and re-interpret established instructional factors in terms of the capabilities of the interactive computer as a training delivery medium. It will be argued that the conjoining of pedagogy and technology in the principles is crucial to the effectiveness of CBT. Furthermore, this study will also argue that the form of the guidance has a direct bearing on its usefulness. The four principles are argued to represent a coherent framework which can raise the awareness of CBT designers on key instructional issues and the ways in which the delivery medium may be used to support them, and provide a resource on which designers may draw. The relevance and effectiveness of the principles (and the issues that they address) are explored through a body of empirical work. This takes the form of two studies: a survey of designers providing comments on the content and expression of the principles and their importance to CBT design; and a series of user trials. The contrasting nature of the studies allows the comments of designers and users to be assessed and compared.
4
Feng, Hai. "The Design and Implementation of a Kinect-Based Rehabilitation Exercise Monitoring and Guidance System." Cleveland State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=csu1432053063.
Повний текст джерела
5
Wanigarathna, Nadeeshani. "Evidence-based design for healthcare buildings in England and Wales." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/16161.
Повний текст джерелаАнотація:
A substantial amount of credible evidence shows that properly designed healthcare built environments can positively impact upon the health outcomes of the building users. This offers an opportunity to improve the quality of healthcare through appropriately designed healthcare built environments. Evidence-based design (EBD) emerged within healthcare building design practice to enhance the process of designing with credible evidence. This research explored improvement opportunities for EBD in the UK which would subsequently improve the quality of healthcare through built environment interventions. Specifically, three key research gaps were addressed during this research. Firstly, this research explored current practices of evidence use during healthcare designing and opportunities to increase the direct use of research-based evidence and alternative ways of conveying research-based evidence into the design process through other source of generic evidence for design. Secondly, this research explored how evidence could be effectively expressed within healthcare design standards, guidance and tools (SGaTs) in the forms of performance and prescriptive specifications. Finally, considering the unique nature of built environment design, this research explored how project unique contextual circumstances impact EBD processes and how practitioners reflect on these circumstances. These challenges were then transformed into six objectives. Following a comprehensive literature review, this research was divided into four phases. First, a model of the sources and flows of evidence (SaFE) was developed to represent evidence for EBD within generic evidence for design. The initial conceptual model was developed through desk study, based on the literature review, self-experience and the experience. This model was then verified with the comments from five un-structured interviews conducted with lecturers and senior lecturers of the School of Civil and Building Engineering. Finally, the model was validated using 12 semi-structured interviews conducted with design practitioners from the industry. In addition to the validating the sources and flows of evidence these interviews revealed rationales behind design practitioners use of evidence from four types of evidence sources. These results revealed improvement opportunities to increase the intake of research-based evidence use during healthcare built environments designing. The main data collection method for this research was case studies. Eight exemplar design elements within three case studies were investigated to explore details of evidence use practices; practices of using performance and prescriptive specifications; and impact of project unique contextual circumstances for EBD process and how design practitioners reflect on these circumstances. Results of this research revealed that EBD needs to be supported by both externally published research evidence and through internally generated evidence. It was also identified that EBD could be significantly facilitated through research- evidence informed other generic design evidence sources. Healthcare design SGaTs provides a promising prospect to facilitate EBD. Performance specification driven healthcare design SGaTs supplemented by prescriptive specifications to define design outputs and design inputs could improve effective use of evidence-informed SGaTs. These results were incorporated into a framework to guide development of healthcare design SGaTs. Finally, by exploring how projects unique contextual circumstances impact EBD processes and how practitioners reflect on these circumstances, this research identified the need for procedural guidance for designers to guide evidence acquisition, evidence application and new evidence generation.
6
Kirkpatrick, Daniel Eugene. "Design of a Hardware Platform for GPS-Based Orientation Sensing." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2197.
Повний текст джерелаАнотація:
Unmanned aerial vehicles (UAV's) have recently gained popularity in military, civil service, agriculture, commercial, and hobby use. This is due in part to their affordability, which comes from advances in component technology. That technology includes microelectromechanical systems (MEMS) for inertial sensing, microprocessor technology for sequential algorithm processing, field programmable gate arrays (FPGA's) for parallel data processing, camera technology, global navigation satellite systems (GNSS's) for navigation, and battery technology such as the high energy density of lithium polymer batteries.
Despite the success of the technology to date, there remains development before UAV's should be flying alongside manned aircraft or over populated areas. One concern is that UAV electronics are not as safe, reliable or robust as manned-aircraft electronics because UAV's are not certified by the FAA. Another concern for UAV operation is with control algorithms and sensors, particularly in the estimation of the aircraft state, which is the position, velocity, and orientation of the aircraft. Some problems, such as numerical stability of a control algorithm or flight in windy and turbulent conditions have only been solved for certain conditions of wind, weather, or maneuvers. Outside those conditions, the actual orientation of a flying craft can mislead to the control system, and the control system may not be able to recover without a crash. When pilots fly manned aircraft in instrument meteorological conditions, or conditions of limited visibility of the ground, terrain, and obstacles, the pilot must fly in a manner which avoids abrupt maneuvers which could disturb accuracy of the aircraft's instruments. In a UAV without a pilot, there is a need to estimate the position and orientation of a UAV in an absolute manner unambiguous relative to the Earth. The position and orientation estimate must not depend on carefully controlled flight paths, but instead the estimate must be robust in the presence of UAV flight dynamics.
This thesis describes the design, implementation, and evaluation of a hardware platform for GPS based orientation sensing research. In this work, we considered a receiver with three or four RF sections, each connected to an antenna in a triangular or tetrahedral pyramid constellation. Specific requirements for the receiver hardware and functionality were created. Circuitry was designed to meet the requirements using commercial off-the-shelf (COTS) radio frequency (RF) modules, a mid-sized microcontroller, an FPGA, and other supporting components. A printed circuit board (PCB) was designed, fabricated, assembled, and tested. A GPS baseband processor was designed and coded in Verilog hardware description language. The design was synthesized and loaded to the FPGA, and the microcontroller was programmed to track satellites.
With the hardware platform implemented, live satellite signals were found and tracked, and experiments were performed to explore the validity of GPS based orientation sensing using short antenna baselines. The platform successfully allows the user to develop correlator designs and explore carrier phase based orientation measurement using only software/Verilog modifications. Initial results of carrier phase based orientation sensing are promising, but the presence of multipath signal interference shows room for improvement to the baseband processing code.
7
Rahman, Mashuqur. "Rheology of cement grout : Ultrasound based in-line measurement technique and grouting design parameters." Doctoral thesis, KTH, Jord- och bergmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176885.
Повний текст джерелаАнотація:
Grouting is performed in order to decrease the permeability and increase the stiffness of the material, especially soil and rock. For tunnelling and underground constructions, permeation grouting is done where cement based materials are pumped inside drilled boreholes under a constant pressure, higher than the ground water pressure. The aim of permeation grouting is to reduce the water flow into tunnels and caverns and to limit the lowering of the surrounding groundwater table. Cement based materials are commonly used as grout due to their availability and lower costs. To obtain a proper water sealing and reduce the lowering of the ground water table, a desired spread of grout must be achieved and the rheology of the cement grout is the governing factor for estimating the required spread. Rheological properties of cement grout such as viscosity and yield stress are commonly measured off-line using laboratory instruments, and some simple tools are available to make field measurements. Although the rheological properties of the grout that is used play a fundamental role in design and execution, no method has yet been developed to measure these properties in-line in field work. In addition to the real time measurement, there is no standard method for determining the yield stress for grouting applications. Despite the common usage of Bingham model fitting to determine the yield stress, the range of shear rate is often not specified or is neglected. In this work, an in-line rheometry method combining the Ultrasound Velocity Profiling (UVP) technique with Pressure Difference (PD) measurements, known as “UVP+PD”, was successfully tested for continuous in-line measurements of concentrated micro cement based grouts. A major obstacle of using the ultrasound based methodology was the transducers, which would be capable of emitting sufficient acoustic energy and can be used in field conditions. The transducer technology was developed in a parallel project and the Flow-Viz industrial rheometer was found to be capable of detail measurement of the velocity profiles of cement grout. The shape of the velocity profiles was visualized, and the change in the shape of the profiles with concentration and time was observed. The viscosity and yield stress of the grout were determined using rheological models, e.g. Bingham and Herschel-Bulkley. In addition, rheological properties were determined using the non-model approach (gradient method) and the tube viscometry concept and were compared with results obtained using the rheological models. The UVP+PD method was found to be capable of determining the rheological behavior of cement grout regardless of the rheological model. The yield stress of cement grout was investigated using off-line rheometry techniques and UVP+PD in-line measurements. Tests were performed applying different shear histories and it was found that two ranges of yield stress indeed exist. Therefore, the design value of yield stress should be chosen with respect to the prevailing shear rate at the grout front for the required spread of grout. In addition, an appropriate shear rate range should be used when a Bingham fitting is done to determine the yield stress. In order to estimate the shear rate, plug thickness and velocity for one dimensional and two dimensional geometry, a non- dimensional nomogram was developed. The advantage of using the nomogram is that it does not depend on the applied pressure and the rheological properties of the grout and can therefore, be used as a simple design tool. Analytical approaches were used for the estimation and good agreements were found with numerical calculations and experimental results. In conclusion, in this work, it was found that it is possible to continuously measure the velocity profiles and determine the change of the rheological properties of cement grout using the ultrasound based UVP+PD method under field conditions. The yield stress was also investigated and it was found that two range of yield stress exist depending on the prevailing shear rate of the grout, which should be used for designing the grouting time at different conditions. In order to decide the design value of yield stress for grouting applications, a non-dimensional nomogram was developed that can be used to estimate the plug thickness, shear rate and velocity of the grout.Funding for the project was provided by the Swedish Rock Engineering Research Foundation (BeFo), The Swedish Research Council (FORMAS) and The Development Fund of the Swedish Construction Industry (SBUF), who are gratefully acknowledged. QC 20151112
8
Mendi, H. Evgin. "Evaluation Of Architectural Consciousness And Exploration Of Architecture-based Issues In Seismic Design." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606480/index.pdf.
Повний текст джерелаАнотація:
The task of &lsquoearthquake resistant design&rsquo
of buildings is generally considered as the province of engineering profession. Although there exists considerable number of publications related to seismic design (documentations, articles, theses, books, and earthquake codes), most of them are addressed to structural engineers rather than architects. However, earthquake affects whole building and all professionals involved in construction process should have their own roles and responsibilities for earthquake resistance. This thesis is about the roles and responsibilities of architects for being one of the professionals related to building construction and, particularly, the designers of them. Exposure of the level of awareness of architects related to the importance of their architectural designs having significant effects on seismic performance of buildings, and the level of general knowledge of them related to architecture-based seismic design issues is aimed. In this thesis, firstly, terminology related to &lsquo
earthquake&rsquo
phenomena is concisely introduced. Then, the present state of attitudes (interest, awareness and consciousness) of architectural community, architects working in the architectural offices of Ankara, towards earthquake and architecture-based seismic design issues is questioned and evaluated with a survey in the form of questionnaires. The evaluation of the results is presented with the help of statistical software called SPSS. Finally, the architecture-based issues in seismic design are re-explored and introduced for the use of architects. Thus, general idea or basic knowledge is formed, which is inferred from the survey as being one of the ways to enhance the incorporation of architecture-based seismic design issues into architectural design process.
9
Anisi, David A. "Online trajectory planning and observer based control." Licentiate thesis, Stockholm : Optimization and systems theory, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4153.
Повний текст джерела
10
De, Cino Thomas James. "A Usability and Learnability Case Study of Glass Flight Deck Interfaces and Pilot Interactions through Scenario-based Training." NSUWorks, 2016. http://nsuworks.nova.edu/gscis_etd/948.
Повний текст джерелаАнотація:
In the aviation industry, digitally produced and presented flight, navigation, and aircraft information is commonly referred to as glass flight decks. Glass flight decks are driven by computer-based subsystems and have long been a part of military and commercial aviation sectors. Over the past 15 years, the General Aviation (GA) sector of the aviation industry has become a recent beneficiary of the rapid advancement of computer-based glass flight deck (GFD) systems.
While providing the GA pilot considerable enhancements in the quality of information about the status and operations of the aircraft, training pilots on the use of glass flight decks is often delivered with traditional methods (e.g. textbooks, PowerPoint presentations, user manuals, and limited computer-based training modules). These training methods have been reported as less than desirable in learning to use the glass flight deck interface. Difficulties in achieving a complete understanding of functional and operational characteristics of the GFD systems, acquiring a full understanding of the interrelationships of the varied subsystems, and handling the wealth of flight information provided have been reported. Documented pilot concerns of poor user experience and satisfaction, and problems with the learning the complex and sophisticated interface of the GFD are additional issues with current pilot training approaches.
A case study was executed to explore ways to improve training using GFD systems at a Midwestern aviation university. The researcher investigated if variations in instructional systems design and training methods for learning glass flight deck technology would affect the perceptions and attitudes of pilots of the learnability (an attribute of usability) of the glass flight deck interface. Specifically, this study investigated the effectiveness of scenario-based training (SBT) methods to potentially improve pilot knowledge and understanding of a GFD system, and overall pilot user experience and satisfaction.
Participants overwhelmingly reported positive learning experiences from scenario-based GFD systems flight training, noting that learning and knowledge construction were improved over other training received in the past. In contrast, participants rated the usability and learnability of the GFD training systems low, reporting various problems with the systems’ interface, and the learnability (first-time use) of the complex GFD system. However, issues with usability of the GFD training systems did not reduce or change participant attitudes towards learning and mastering GFD systems; to the contrary, all participants requested additional coursework opportunities to train on GFD systems with the scenario-based flight training format.
11
Anisi, David A. "On Cooperative Surveillance, Online Trajectory Planning and Observer Based Control." Doctoral thesis, KTH, Optimeringslära och systemteori, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9990.
Повний текст джерелаАнотація:
The main body of this thesis consists of six appended papers. In the first two, different cooperative surveillance problems are considered. The second two consider different aspects of the trajectory planning problem, while the last two deal with observer design for mobile robotic and Euler-Lagrange systems respectively.In Papers A and B, a combinatorial optimization based framework to cooperative surveillance missions using multiple Unmanned Ground Vehicles (UGVs) is proposed. In particular, Paper A considers the the Minimum Time UGV Surveillance Problem (MTUSP) while Paper B treats the Connectivity Constrained UGV Surveillance Problem (CUSP). The minimum time formulation is the following. Given a set of surveillance UGVs and a polyhedral area, find waypoint-paths for all UGVs such that every point of the area is visible from a point on a waypoint-path and such that the time for executing the search in parallel is minimized. The connectivity constrained formulation extends the MTUSP by additionally requiring the induced information graph to be kept recurrently connected at the time instants when the UGVs perform the surveillance mission. In these two papers, the NP-hardness of both these problems are shown and decomposition techniques are proposed that allow us to find an approximative solution efficiently in an algorithmic manner.Paper C addresses the problem of designing a real time, high performance trajectory planner for an aerial vehicle that uses information about terrain and enemy threats, to fly low and avoid radar exposure on the way to a given target. The high-level framework augments Receding Horizon Control (RHC) with a graph based terminal cost that captures the global characteristics of the environment. An important issue with RHC is to make sure that the greedy, short term optimization does not lead to long term problems, which in our case boils down to two things: not getting into situations where a collision is unavoidable, and making sure that the destination is actually reached. Hence, the main contribution of this paper is to present a trajectory planner with provable safety and task completion properties. Direct methods for trajectory optimization are traditionally based on a priori temporal discretization and collocation methods. In Paper D, the problem of adaptive node distribution is formulated as a constrained optimization problem, which is to be included in the underlying nonlinear mathematical programming problem. The benefits of utilizing the suggested method for online trajectory optimization are illustrated by a missile guidance example.In Paper E, the problem of active observer design for an important class of non-uniformly observable systems, namely mobile robotic systems, is considered. The set of feasible configurations and the set of output flow equivalent states are defined. It is shown that the inter-relation between these two sets may serve as the basis for design of active observers. The proposed observer design methodology is illustrated by considering a unicycle robot model, equipped with a set of range-measuring sensors. Finally, in Paper F, a geometrically intrinsic observer for Euler-Lagrange systems is defined and analyzed. This observer is a generalization of the observer proposed by Aghannan and Rouchon. Their contractivity result is reproduced and complemented by a proof that the region of contraction is infinitely thin. Moreover, assuming a priori bounds on the velocities, convergence of the observer is shown by means of Lyapunov's direct method in the case of configuration manifolds with constant curvature.QC 20100622
TAIS, AURES
12
Eric, MANIRAGUHA, NTAGWIRUMUGARA Etienne, and Nenad GLODIC. "UTILIZATION OF WIND POWER IN RWANDA: Design and Production Option." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240659.
Повний текст джерелаАнотація:
This Master Thesis is the research done in the country of Rwanda. The project leads to study the climate of this country in order to establish whether this climate could be used to produce energy from air and to implement the first wind turbine for serving the nation. After an introduction about the historical background of wind power, the thesis work deals with assessment of wind energy potential of Rwanda in focusing of the most suitable place for wind power plants. The best location with annual mean wind speed, the rate of use of turbine with hub height for an annual production per year, the mean wind speeds for 6 sites of Rwanda based on ECMWF for climatic data for one year at relief of altitude of 100m and coordinates are reported too. The result of energy produced and calculations were done based on power hitting wind turbine generator in order to calculate Kinetic energy and power available at the best location to the measurement over the period of 12 months, that could be hoped for long term. With help of logarithmic law, where wind speed usually increases with increasing in elevation and the desired wind speeds at all 6 sites were used. The annual energy production was taken into account at the best site with desired wind speed at the initial cost of turbine as well as the cost of energy (COE).However, with comparison of the tariff of EWSA, the price of Wind designed in this Research per kWh is cheaper and suitable for people of Rwanda.I WISH TO PUBLISH MY THESIS
13
Yi-Zheng, Chen. "Fuzzy-Logic-Based Guidance System Design." 2000. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611313302.
Повний текст джерела
14
Chen, Yi-Zheng, and 陳奕錚. "Fuzzy-Logic-Based Guidance System Design." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/72244951195995551517.
Повний текст джерелаАнотація:
碩士元智大學
電機工程研究所
88
In this thesis, two kinds of principal guidance laws are introduced. The first kind is the PN-type guidance laws, where four kinds of traditional PN-type guidance laws are introduced, which are proportional navigation (PN), augmented PN (APN), special PN (SPN) and true PN (TPN) guidance laws. The second kind is the command to line-of-sight (CLOS) guidance law. We apply the PN-type guidance laws to the torpedo guidance in this thesis and these guidance laws have mutual character : when a torpedo pursues a target, the navigation constants of these guidance laws are invariable in the process of pursuit. For the concept of guidance system, invariable navigation constant is not so suitable for various pursuit-evasion motion. Since fuzzy logic inference technique possesses the adaptive inference scheme, four kinds of fuzzy-logic-based guidance laws are proposed. They are fuzzy-logic-based PN (named FPN), fuzzy-logic-based APN (named FAPN), fuzzy-logic-based SPN (named FSPN) and fuzzy-logic-based TPN (named FTPN) guidance laws. These fuzzy-logic-based guidance laws are essentially the kind of adaptive guidance laws. By fuzzy logic inference technique, it is observed that, the terminal RMS miss distances of fuzzy-logic-based guidance laws are smaller than those of traditional guidance laws in 2D and 3D space. The fuzzy-logic-based command to line-of-sight (CLOS) guidance law is proposed. The fuzzy associated memory (FAM) are trained and learned by adaptive-network-based fuzzy inference system (ANFIS). An on-line tuning algorithm is also proposed to update the FAM so as to get smaller miss distance. The simulation results demonstrate that it can cope with the target coming from different directions and achieve small miss distance.
15
Li, Hung-Hsiang, and 李弘祥. "Image-Based Guidance Design for Mobile Vehicle." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/28771959148408961249.
Повний текст джерелаАнотація:
碩士國立交通大學
電機與控制工程系所
93
In this thesis, we develop an image sensor based platform for mobile vehicle guidance. This is achieved by the construction of a fuzzy rule for vehicle guidance. The designed platform is consisted of two digital cameras, image grabber card, two revolving mechanical platforms and a target vehicle. A set of control circuit and the code Borland C Builder are used to develop the required hardware and software for target monitoring. The microprocessor Intel 8051 is employed to act as a core for controlling the motion of the target vehicle. A heuristic based fuzzy rule is then constructed for target guidance. The experimental data from an example system demonstrates the effectiveness of the proposed design.
16
Shan-Jay, Yu, and 游憲杰. "A Vision Based Guidance Control Design to Quadrotor Helicopter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/83132707797878357264.
Повний текст джерелаАнотація:
碩士輔仁大學
電機工程學系碩士班
102
Nowadays, planar vertical take-off and landing (PVTOL) of quadrotors raises the considerable interest in the research topic which covers the integration of the vision systems and the controller design. This thesis presents a system integration structure for the fixed PVTOL. Firstly, the system dynamics with 6-DOF for a quadrotor is investigated. Based on this model, the proportional-derivative (PD) controller associated with the altitude, yaw, roll, and pitch are then derived. Moreover, the fuzzy control design is employed to the flying controllers so that the tracking performance in PVTOL can be improved. By using the invariant moment algorithm, the developed vision system can effectively detect and track the landmark against the variation, rotation, and translation in the image. The coordinate of the gravity of the landmark can be calculated for the visual servoing. To this end, the proposed guidance control system can achieve the vision-based PVTOL of the quadrotor. Our system can carry out the visual target tracking under the take-off, landing, and hovering tasks. Through the simulation and experimental verification, the designed fuzzy controllers can outperform the PD controllers in the visual tracking control performance for the PVTOL of the quadrotor.
17
吳韋翰. "An Image-Based Parking lot Monitoring and Guidance Design." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63007894797547376009.
Повний текст джерелаАнотація:
碩士國立交通大學
電機與控制工程系所
94
In this thesis, we develop a guiding system for parking lot based on image processing and database. In traditional parking lot, drivers know the count of the empty parking spaces, but have no idea where the available parking space is. Consequently, we hope to get vehicle’s position in image processing way, further provide guiding information to drivers then guide vehicles to their chosen parking space. The main functions of the system are multiple-object tracking and guidance. In the tracking work, we predict the object’s position by image’s continuity, detect the occurrence of bump condition as well as develop wide area monitoring with the aid of multiple-camera cooperation mechanism. In guiding work, we are able to obtain the guide direction by searching guiding data in database according to vehicle’s position, moving direction and destination.
18
Yeh, Fu-Kuang, and 葉富光. "Variable Structure Theory Based Integrated Guidance/Autopilot Design for Highly Maneuverable Flying Vehicles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65816180566242921715.
Повний текст джерелаАнотація:
博士國立臺灣大學
電機工程學研究所
91
In this thesis, we propose a variable structure based nonlinear integrated guidance/autopilot system design for flying vehicles using optimal control theory with highly maneuverable actuators, which are mainly consisting of pulse type actuators, thrust vector controls, and divert control systems, for the task of intercepting of a theater ballistic missile applied to the intercepting missile or for trajectory tracking of launch vehicles. The objectives of the present work mainly consist of two parts, of which one is to achieve the target interception under various external disturbances and internal perturbations, such that the distance between the missile and the target will enter the range of triggering the missile’s explosion, where the intercepting missile in general will go over the midcourse phase and the terminal phase before the mission is accomplished; the other is to perform the contour-following task of launch vehicles given a predetermined trajectory. First, 3 DOF guidance laws have been developed for different vehicles, considering the aerodynamic influence, the earth’s gravitational field, and the wind gusts, with an aim to minimize the distance between the center of the vehicle and that of the target. Next, quaternion-based sliding-mode attitude controllers also for different vehicles are proposed to track the attitude command while coping with variation of vehicle’s inertia and uncertain aerodynamic force/wind gusts. The stability of the overall system and the zero-effort-miss phase convergence are analyzed thoroughly via Lyapunov stability theory. Extensive simulation results are obtained to validate the effectiveness of the proposed integrated guidance/ autopilot system incorporating the highly maneuverable inputs.
19
JIANG, ZHI-WEI, and 姜智瑋. "Based on the Target Trajectory Estimator to Design Anti-Ballistic Missile Guidance Law." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/82849167016637902663.
Повний текст джерелаАнотація:
碩士國防大學理工學院
兵器系統工程碩士班
104
Ballistic missile re-entry except with the characteristics of high-speed maneuver, that can also change the flight path according to mission requirements, in order to improve the intercept accuracy and increase the survival ability of warheads and penetration ability. Therefore, designing a guidance law of air defense missiles have the ability to intercept maneuvering ballistic missiles, that is nowadays the important issues of the development of anti-ballistic missile system. In this study, Based on the extended Kalman filter (EKF) and input estimation (IE) method to deal with ballistic missile trajectory measurements by radar with noise, so as to get a more accurate estimation of the state and movement of ballistic missiles. Based on the trajectory estimator, using the method of proportional guidance and designing method of improved particle swarm optimization to build guidance law of anti-ballistic missile. With the above two guidance methods to simulate and compare with anti-ballistic missile tracking and interception performance of maneuvering and non-maneuvering ballistic missile. The simulation results show that performance of improved particle swarm optimization guidance (IPSOG) law is better than proportional navigation guidance (PNG) law in miss distance (MD), time-to-go (Tgo), average lateral acceleration and range interception. Improved particle swarm optimization guidance law can effectively improve the probability of intercepting maneuvering ballistic missiles. This study results expect to contribute to the guidance law of future development anti-ballistic missiles that effectively enhance the ability of ballistic missile defense.
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Chun-Hsin, Tsai, and 蔡峻鑫. "Based on the Target Trajectory Estimator to Design Anti-Ballistic Missile Guidance Law." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/23311871666084329275.
Повний текст джерелаАнотація:
碩士國防大學理工學院
兵器系統工程碩士班
101
Due to the acceleration of gravity, ballistic missiles return to the atmosphere have the characteristics of high-speed. A new type of ballistic missiles have better equipped to change the flight path of mobility in reentry. Accordingly, in the face of the goal to have a high-speed and mobility conditions, general surface to air missiles facing serious challenges in the design of guidance law. In this study, based on the trajectory estimation, the framework of ballistic missile intercept point guidance law is designed to create high-precision and low energy consumption. Target trajectory estimator is based on the lateral acceleration and the interference input estimator of the target trajectory estimator, that can estimate the target trajectory accurately. In addition, the trajectory intercept point guidance law system is based on the trajectory prediction algorithm to establish the guidance law. The approach speed and related parameters as the guidance law are utilized to improve the traditional type of proportional guide. Finally, the fuzzy theory algorithm is introduced to enhance the guidance performance. Expectations through the above method to establish the ballistic missile appropriate and feasible guidance law algorithm.
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Shih, Po-Chung, and 石博中. "Design of a Vehicle Guidance System with Event Awareness Based on Wireless Sensor Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/29111563374291061450.
Повний текст джерелаАнотація:
碩士輔仁大學
資訊工程學系
97
Recently, wireless sensor networks (WSNs) have become a hot research topic. Manufacturers have also developed many WSN platforms to be used in the applications of many areas, e.g. military, disaster relief, transportation. In this thesis, we will design a vehicle guidance system with event awareness by using a WSN platform . This vehicle guidance system can be used in the battle field and disaster rescue site to provide a safe and short driving route. The design of the system has two main parts. The work of the front part is to collect the dangerous information via the deployed infrared sensors in the sensing field. In this work, we also design mesh-based routing protocol to transmit the sensed dangerous data of each infrared sensor node. The transmission is based on the multiple-hop manner. Even if some infrared sensor nodes fail, the mesh-based routing protocol can immediately find another available route. For the rear part, the work is to find a safe and short driving route based on the collected dangerous information from the front part. The plan of the driving route can be also used the mesh-based routing protocol. Finally, we demonstrate the designed vehicle guidance system.
22
Yeh, Wei-Hsiang, and 葉瑋翔. "Dynamic Frequency Divider Design Based on MOS-NDR Componentsand and Simulation of Bifurcation by Cubic Spline Interpolation Method." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/waf2z6.
Повний текст джерелаАнотація:
碩士國立嘉義大學
電機工程學系研究所
107
This thesis proposes to use a metal-oxide-semiconductor field-effect transistor (MOSFET) to construct a negative differential resistance (NDR) circuit to replace the traditional resonant tunneling diode (RTD) component. The negative differential resistance circuit and the divider circuit are implemented by the TSMC 0.18μm CMOS process provided by the National Wafer Center (CIC). In this thesis, the cubic spline interpolation is used to operate the bifurcation diagram of the MATLAB software, and the HSPICE software is used to verify the periodic state, quasi-periodic state and chaotic phenomenon. In this paper, the measurement results of the frequency divider are included, and the parameters are changed and the results are compared and discussed.
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Hu, Indi W. H., and 胡維桓. "Design of an Adaptive Guidance Mechanism for Next Generation E-learning Based on Knowledge Inference and Platform Collaborations." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/qfc4ve.
Повний текст джерелаАнотація:
碩士國立高雄第一科技大學
資訊管理所
96
Due to the time and space limitation of traditional learning models, e-learning has already been recognized as an effective media for contemporary learners. The rapid growth of the Internet has accelerated the speed of e-learning platform creation and made it popular for interdisciplinary study. However, the current learning platforms still lack of adaptive guidance mechanism for self-learners. In addition, although the interoperability of learning objects has been improved between different platforms, it is insufficient in intersite knowledge sharing, especially for advanced communication between e-learning platforms. In this thesis, we will propose an approach based on the Concept Map, Markov Chain, and Bayesian Network to construct an adaptive guidance system, which provides a self-learning guidance for deriving a so-called Remedial Instruction Decision Path (RIDP) for various learners to accommodate customized learning objectives. The concept of Web 2.0 has featured content reuse, human-centered, social and user participation. That inspires us to propose a Collaboration Game approach to construct a fair cooperating and sharing mechanism for next generation e-learning. Hopefully, our findings could serve as a reference for constructing e-learning platforms of industries, government organizations, and academies with knowledge sharing to step forward to the realm of e-learning 2.0.
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Garner, Michael Dax. "Systems engineering processes for a student-based design laboratory." Thesis, 2009. http://hdl.handle.net/2152/ETD-UT-2009-12-607.
Повний текст джерелаАнотація:
A student-based university environment for engineering design and development is much different from a product development environment within the aerospace industry. Therefore, a different approach to systems engineering should be considered. By its very nature, a university product development laboratory thrives on creativity and rejects bureaucracy. Experience shows that continuity and discipline within a project is crucial for success. The practice of systems engineering enables technical project discipline. Systems engineering is the art and science of developing an operable system that meets requirements within imposed constraints. The purpose of this thesis is to describe the systems engineering processes and techniques necessary for a student-based project, and explicitly show how to implement these processes. Although attempts have been made to utilize a few systems engineering techniques in past projects, many students did not properly and consistently apply those techniques to the technical design work. The goal of the thesis is to tailor the NASA systems engineering processes to a student-based design laboratory environment and to apply the methodologies to the mission design of Paradox. The Picosatellite for Autonomous Rendezvous and Docking on-Orbit eXperiment, or Paradox, is the second of four missions to demonstrate autonomous rendezvous and docking with a picosatellite-class satellite.
A strong technical contribution highlighted within the thesis involves developing an open architecture rendezvous targeting algorithm for the Paradox mission in the face of large mission architecture uncertainties. The robust targeting algorithm builds from previous work utilizing an optimizer based on the Clohessey-Wiltshire equations and an iterative Lambert targeter. The contribution extends the rendezvous transfer times by including a multi-revolution Lambert targeter. The rendezvous algorithm will perform successfully given any launch vehicle and target spacecraft vehicle supporting the notion of an open architecture to satisfy the mission. The development of the algorithm is embedded within the context of the systems engineering processes to clearly showcase the intimate connection between systems engineering processes and the technical engineering design of a mission.text
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Tseng, Kun-Chuan, and 曾崑銓. "Based on the Target Trajectory Estimator to Design Fuzzy Weights Aiming Point Guidance Law for Air-to-air Missile." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/97644168540316930230.
Повний текст джерелаАнотація:
碩士國防大學理工學院
兵器系統工程碩士班
101
The aiming point guidance law (APG) is new air-to-air guidance law developing to intercept maneuvering target based on target trajectories estimation. However, APG obtains lager lateral acceleration in the missile launching because navigation ration is constant. According to the fuzzy weighting rule, the study refering the parameters of relative motion between the missile and the target inferences adaptive navigation constant by means of improving generate greater lateral acceleration. In addition, Our design uses an extended state observer (ESO) utilizing target informations acquired from the seeker to establish a simple, effective and fast target trajectory estimation algorithm on the missile computer. Finally, we integrate APG, fuzzy weights inference rules and ESO into modified aiming point guidance law (MAPG) and verify integrated effectiveness of the estimator and the guidance law through simulating different scenarios.
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JEN, LO CHIH, and 羅志任. "Analysis and Design Optimization of the Burglarproof Monitoring and Guidance for Parking Based on RFID Utilizing Technical Elements of Patents." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/60192671261361858133.
Повний текст джерелаАнотація:
碩士大葉大學
電機工程學系
99
The society is thereupon rising because of spirit and material life now, nearly everybody has a car, because the space is limited and parks demand is great. The parking area not only becomes stereoscopic from level, the state of kind has no doubt responded to the request that on the quantity of parking stall, but the problem of management of the parking area has been existing all the time. This thesis utilizes the patent of RFID to find out that publish the patent materials about parking area and analyze. the relevant patent materials employed to the parking area, define eight application functions of the parking area. The characteristic is disassembled to carry on eight application functions of parking area, analyze and disassemble the characteristic one one by one, and the management parking area system of carrying out amalgamation and exactly formating the optimization to eight application functions. The management of very effective parking area is more convenient, the suffering loss by theft rate is reduced, the vehicle circulates, more efficient.
27
Kuo, Hsu-Chan, and 郭旭展. "The Design of Modular-Based Curriculum and Instruction of Coaching Guidance Competence of Aerobic Exercise for Metabolic Syndrome for Psychiatric Nurses." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/55619607876745952073.
Повний текст джерелаАнотація:
碩士國立台北護理學院
護理研究所
98
Metabolic syndrome has been viewed as an important health issue by all governments around the world and the academia in recent years. Under the influence of lifestyle and side effect of medication, psychiatric patients suffer from a significantly higher prevalence rate of metabolic syndrome than general population. Enhancing clinical nurses’ care ability to solve this serious problem will thus be an imperative task in the future. The purpose of the present study was to construct and standardize the process of coaching psychiatric patients with metabolic syndrome to perform aerobics and confirm nurses’ ability to execute the process. Based on the results, this study designed modular-based curriculums and instructions to provide a basis for training nursing coaches of aerobic exercise for psychiatric patients with metabolic syndrome. The research comprised three stages. In the first stage, the researcher first reviewed domestic and foreign literatures associated with metabolic syndrome mechanisms and aerobic exercise. Later, the researcher obtained an international certification for professional fitness instructors and integrated his clinical experience in psychiatric nursing to construct a tentative process of coaching psychiatric patients with metabolic syndrome to perform aerobics. The ability to execute the process was confirmed, and modular-based curriculums were developed in this stage. In the second stage, the researcher engaged in the design of a tree structure, creation of instructional materials, and editing of modular-based curriculums. The third stage was focused on examination of the quality of the curriculums and the instructional design. Two focus-group interviews were also conducted in this stage. 13 senior nursing specialists in the psychiatric department of Hospitals of Department of Health were invited to participate in the first focus-group interview, and 5 experts, including psychiatric physician, fitness trainer, nutritionist, and senior nursing specialists were invited to participate in the second focus-group interview. These participants discussed the process of coaching psychiatric patients with metabolic syndrome to perform aerobics, design of modular-based curriculums, and evaluation methods. Their conclusions were analyzed and used as a basis for modifying the modular-based curriculums and the instructional design. The results are as follows: (1) The process of coaching psychiatric patients with metabolic syndrome to perform aerobics was standardized and the ability to execute the process was confirmed. (2) Five modular-based curriculums were developed, including: 1. prerequisite knowledge about coaching psychiatric patients with metabolic syndrome to perform aerobic exercise; 2. issues regarding safety of aerobic exercise of psychiatric patients with metabolic syndrome; 3. the process of coaching psychiatric patients with metabolic syndrome to perform aerobics; 4. common situations of and decisions for metabolic syndrome in psychiatric sickrooms; 5. fitness and exercise prescription. (3) Learning goals, evaluation indexes and guidelines, learning activities, evaluation methods and tools were designed for each modular-based curriculum. (4) A learner manual about the modular-based curriculums on coaching psychiatric patients with metabolic syndrome to perform aerobics was designed. The results of this research could be a basis for training nursing coaches of aerobic exercise for psychiatric patients with metabolic syndrome. Moreover, it could also serve as a reference for medical institutions, Psychiatric Mental Health Nurses’ Association, and related regional associations on arrangement of continuing education or on-the-job training.
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Wang, Yi-feng, and 王藝逢. "A Study of Public Communication Design and an Assessment of its Results – Road Traffic Safety Guidance Based on the Health Belief Model." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/38279837255952613947.
Повний текст джерелаАнотація:
碩士義守大學
管理研究所碩士班
97
Parents love their children more than anything, and yet there are many unforeseen accidents that may occur as our children grow up. These accidents are the number one killer of children. Moreover, of these, road traffic accidents have always been the main cause of death and injury to children under the age of four. It is for this reason that many countries consider child passenger safety as the main focus of accident prevention campaigns. Road traffic accidents are the main cause of infant death and injury. The use of infant safety seats effectively reduces and prevents death and injury in traffic accidents. In view of this, the Ministry of Transportation has formulated the “Guidance Concerning the Implementation of Safety Seats in Cars Carrying Infants” in order to guarantee child passenger safety. However, at the present time, the important public information films put out by many official departments do little more than provide a reiteration of the guidance or come in the form of DVs. Official departments currently solicit these public information films largely by the said department putting out its request in the form of main guidance points. Plans are then solicited by public bidding, whereby film producers select the plans and scripts according to instinct. This selection process is therefore dependent on the individual subjective preferences and judgments of the evaluation committee, which selects what it feels to be the most effective and creative script. The process lacks theoretical basis from a communication design point of view. Selection is based purely on personal preference or the creativity of the filmmaker, with no theoretical grounding for the setting of the information content. With a communication design-based strategy with theoretical suggestions as its basis, this research aims to promote the importance of the health belief model (HBM), thereby building and strengthening the recognition of drivers’ behavior with regard to infant safety. Therefore, this research conducted a concrete series of evaluation experiments using a communication design-created DV concerning the mandatory education and guidance of infant road traffic safety. The different effects of mandatory education and guidance as opposed to normal education and guidance were compared. Research results showed that there was no obvious difference between the “recognition of laws and regulations concerning child safety seats” and the “attitude towards child safety seats”, but that there was an obvious difference (and also a positive effect) with regard to the “usage of child safety seats”. This proves that the communication design stance upheld by this research genuinely had substantial and positive results.
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Bollinger, Robert Albin. "Evaluation of the light emission kinetics in luciferin/luciferase-based in vivo bioluminescence imaging for guidance in the development of small animal imaging study design." 2006. http://edissertations.library.swmed.edu/pdf/BollingerR051506/BollingerRobert.pdf.
Повний текст джерела
30
Zheng, Yu-Jie, and 鄭玉婕. "The Design of Incorporating Robots and IoT Toys in a Game-Based English Learning Scenario and the Effects of Robot Providing Guidance on Children''s English Listening Performance." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2qx9g4.
Повний текст джерела
31
Seguin, Emmanuel J. "Low Cost Fpga Based Digital Beamforming Architecture for Casa Weather Radar Applications." 2010. https://scholarworks.umass.edu/theses/449.
Повний текст джерелаАнотація:
Digital beamforming is a powerful signal processing technique used in many communication and radar sensing applications. However, despite its many advantages, its high cost makes it a less popular choice than other directional antenna options. The development of a low cost architecture for digital beamforming would make it a more feasible option, allowing it to be used for a number of new applications. Specifically, the Collaborative, Adaptive Sensing of the Atmosphere (CASA) project’s Distributed Collaborative Adaptive Sensing (DCAS) system, a low cost weather radar system, could benefit from the incorporation of digital beamforming into small, inexpensive but highly functional radars. Existing DBF architectures are implemented in complex systems which include a number of expensive processing modules and other associated hardware. This project shows a low-cost digital beamforming architecture that has been developed by utilizing today’s powerful and inexpensive FPGA devices along with recently available low-voltage-differential-signaling enabled multi-channel analog to digital conversion hardware. The utilization of commercially available devices rather than custom hardware allows this architecture to be manufactured at a fraction of the cost of most. This makes it a viable alternative to the classic dish antennas for the DCAS system, allowing a reduction in size and cost which will benefit deployment. The flexibility of an FPGA-based DBF system will result in a more robust radar system. With this in mind, an architecture has been developed, fabricated and evaluated.
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Eric, MANIRAGUHA. "UTILIZATION OF WIND POWER IN RWANDA : Design and Production Option." Thesis, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149574.
Повний текст джерелаАнотація:
This Master Thesis is the research done in the country of Rwanda. The project leads to study the climate of this country in order to establish whether this climate could be used to produce energy from air and to implement the first wind turbine for serving the nation. After an introduction about the historical background of wind power, the thesis work deals with assessment of wind energy potential of Rwanda in focusing of the most suitable place for wind power plants. The best location with annual mean wind speed, the rate of use of turbine with hub height for an annual production per year, the mean wind speeds for 6 sites of Rwanda based on ECMWF for climatic data for one year at relief of altitude of 100m and coordinates are reported too. The result of energy produced and calculations were done based on power hitting wind turbine generator in order to calculate Kinetic energy and power available at the best location to the measurement over the period of 12 months, that could be hoped for long term. With help of logarithmic law, where wind speed usually increases with increasing in elevation and the desired wind speeds at all 6 sites were used. The annual energy production was taken into account at the best site with desired wind speed at the initial cost of turbine as well as the cost of energy (COE).However, with comparison of the tariff of EWSA, the price of Wind designed in this Research per kWh is cheaper and suitable for people of Rwanda.Rwanda has considerable opportunities development energy from hydro sources, methane gas, solar and peat deposits. Most of these energy sources have not been fully exploited, such as solar, wind and geothermal. As such wood is still being the major source of energy for 94 per cent of the population and imported petroleum products consume more than 40 per cent of foreign exchange. Energy is a key component of the Rwandan economy. It is thus recognized that the current inadequate and expensive energy supply constitutes a limiting factor to sustainable development. Rwanda’s Vision 2020 emphasizes the need for economic growth, private investment and economic transformation supported by a reliable and affordable energy supply as a key factor for the development process. To achieve this transformation, the country will need to increase energy production and diversify into alternative energy sources. Rwandan nations don’t have small-scale solar, wind, and geothermal devices in operation providing energy to urban and rural areas. These types of energy production are especially useful in remote locations because of the excessive cost of transporting electricity from large-scale power plants. The application of renewable energy technology has the potential to alleviate many of the problems that face the people of Rwanda every day, especially if done so in a sustainable manner that prioritizes human rights.