Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Variable Structure Control"”.
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Variable structure control systems
… thesis, is to provide a body of knowledge on variable structure system theory and to apply the developed design concepts to control practical systems. It introduces the concept of a structure. The main aim in designing variable structure controllers, is to synthesize a variable structure …
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Adaptive Variable Structure Control System for Attitude Spacecraft Applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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Microprocessor-based soft variable structure control for D.C. motor speed regulation
The theory of soft variable structure control, which produces robustness to parameter variation and fast transient response, is discussed in this thesis. The digital implementation techniques are presented in the aspects of sample rate, prefilter design, hardware selection, and microprocessor …
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Increasing the capacity of an ultrasonic communication systems using variable structure control
… is used. This thesis studies the design of a Variable Structure Controller (VSC)-based transmitter and receiver with the aim of increasing the capacity of a PM-based US communications system. Simulation results are presented to demonstrate that a VSC controller can be employed in combination …
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Inversion of input/output map, sliding mode and nonlinear flight control system design
We present the review of two approaches for control system design. These are: (i) Non-Linear Inverse Dynamics and (ii) Variable Structure Control; These two schemes of design are applied to a realistic aircraft flight model. The equations of motion are highly nonlinear and the design of a control …
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Real time adaptive control of an Autonomous Underwater Vehicle (AUV)
In this research the problem of designing a controller for the dive maneuver of an Autonomous Underwater Vehicle (AUV) is addressed. The highly nonlinear nature of the vehicle dynamics and the requirement for the fast maneuvering call for robust control techniques. In particular Variable Structure …
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Estudo de sistemas de controle a estrutura variável
Study of a class of adaptive control systems: the Variable Structure Control Systems. A control system is said to be of variable structure if the structure and/or the parameters of the controller varies, the parameters variations being discontinuous, depending on the state, and/or the perturbations …
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AN OPTIMAL VARIABLE STRUCTURE STABILIZER FOR A MULTIMACHINE GENERATING PLANT
… in damping out all modes of oscillation. A multivariable stabilizer can be advantageous to stabilize the dynamic performance of a multimachine plant in which all parallelly connected units act simultaneously. In this thesis, three kinds of novel stabilizers for a multimachine plant are proposed. …
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Bandwidth-limited robust nonlinear spacecraft control
… large-angle spacecraft pointing and tracking by Variable Structure Control (VSC) are developed. The control of multiaxial attitude dynamics is a highly nonlinear problem, which can be resolved by exact feedback linearization with respect to attitude variables. This requires exact measurements and …
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Non-linear excitation and governor control
Modern microprocessor capabilities permit the control designer to consider using relatively complicated nonlinear control algorithms, which would have been considered impractical in the past. This thesis presents the results of a study of the variable structure control and inverse control technique …
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Variable Structure and Ultimate Boundedness control and stabilization of flexible robotic systems
In this thesis we study the control of two link light weight elastic manipulator in the presence of uncertainty. The control of flexible robotic arm with uncertainty such as variable payload, joint angle frictional torque etc., is an interesting and important problem; Here we consider control of …
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RTOS Control of Hardware Processes
… thesis, adding hardware-process support to Microcontroller Real-time Operating System Version 2 (MicroC/OS-II) is proposed. MicroC/OS-II is a hard real-time operating system (RTOS), mostly written in the C programming language. MicroC/OS-II is designed to manage limited resources within embedded …
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Inverse and variable structure trajectory control of a flexible robotic manipulator
This thesis introduces two schemes that control the end effector trajectory and stabilize a two-link flexible robotic arm. They are (i) The Inverse Trajectory Control scheme and (ii) The Variable Structure System (VSS) scheme; The Inverse Trajectory Control scheme develops a control law based on …
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Nonlinear Analysis and Control of Standalone, Parallel DC-DC, and Parallel Multi-Phase PWM Converters
… frequency even for the same topological structure. The prevalent procedure for analyzing the stability of switching converters is based on linearized smooth averaged (small-signal) models. Yet there are systems (in active use) that yield a non-smooth averaged model. Even for systems for …
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Global parameter identification and control of nonlinearly parameterized systems
… there exist relatively few results in control systems literature which exploit the structure of the nonlinear parameterization. A vast majority of presently applicable global control design approaches to systems with NLP, make use of either feedback-linearization, or assume linear …
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Variable Strategy Model of the Human Operator
… often employ discontinuous or "bang-bang" control strategies when performing large-amplitude acquisition tasks. The current study applies Variable Structure Control (VSC) techniques to model human operator behavior during acquisition tasks. The result is a coupled, multi-input model …
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Nonlinear Sliding Mode Observer Applied to Microalgae Growth
… due to its nonlinear behavior and coupled variables. Recently, cultivating oleaginous microalgae for biofuel production has been another region of ongoing research, especially application of observer theory to estimate internal parameters that are not easily measured in algal systems. …
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Variable structure and singular perturbation control of elastic dynamical systems
This thesis treats the question of control of flexible dynamical systems for space applications. Two elastic dynamical systems are considered; The multibody system developed in Phillips Laboratory, Edwards Air Force Base, CA consists of two elastic links actuated by electric motors at the joints …
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Multi-objective inversion-based control of building integrated energy systems
… Making these systems work together presents a control challenge for their efficient use, especially since they can have a simultaneous effect on both the thermal and electrical energy networks.This research addresses the design of a robust multi-input multi-output (mimo) controller applicable …
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Effect of System Dynamics on Shape Memory Alloy Behavior and Control
… For the SMA-actuated robotic arm, several control methods are designed through simulations. A position-based PID controller is designed first, and it is found that this controller cannot perform well for all the desired angular positions(set-points). A Variable Structure Control (VSC) based …
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