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 25 for “"delay systems"”.
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Dynamic Programming and Time-Varying Delay Systems
… for analysis of stability and performance of systems with time-varying delays. The two papers presented in the first part attacks optimal control problems with finite but rapidly increasing search space. In the first paper we try it reduce the complexity of the optimization by exploiting the …
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Structural properties and estimation of delay systems.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Control of delay systems for minimax sensitivity
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1986
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Time-delay systems : stability, sliding mode control and state estimation
Time delays and external disturbances are unavoidable in many practical control systems such as robotic manipulators, aircraft, manufacturing and process control systems and it is often a source of instability or oscillation. This thesis is concerned with the stability, sliding mode control and …
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Stability Analysis of Time Delay Systems Using Spectral Element Method
… study the response and the stability of various delay differential equations (DDEs). The development of these new analysis techniques is motivated by the existence of delays in the governing equations of many physical systems such as turning and milling processes. </p><p>Delay differential …
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New Results on Time-Delay Systems Towards Model-Based Design
… thesis is devoted to the stability study of time-delay systems, a subject that has been vigorously pursued by such learned societies as diversely represented in mathematics, science, engineering, and economics. Time-delay systems, which are also sometimes known as hereditary systems, systems with …
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Analysis and implementation of time-delay systems and networked control systems
Systems with delays frequently appear in engineering. The presence of delays makes system analysis and control design much more complicated. Networked control systems where the delays are often random are typical cases of such systems.<br/><br/>For one particular category of time-delays systems, …
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Adaptive control of time delay systems and applications to automotive control problems
This thesis is about the adaptive control of time delay systems with applications to automotive control problems. The stabilization of systems involving time delays is a difficult problem since the existence of a delay may induce instability or poor performance for the closed loop system. A unique …
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An adjoint-based formalism for optimal design of time-delay systems and uncertainty quantification in stochastic systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Stability Analysis of Positive Systems with Applications to Epidemiology
… we deal with stability of uncertain positive systems. Although in recent years much attention has been paid to positive systems in general, there are still many areas that are left untouched. One of these areas, is the stability analysis of positive systems under any form of uncertainty. In …
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Output Regulation of Systems Governed by Delay Differential Equations: Approximations and Robustness
… for tracking and disturbance rejection of systems governed by delay differential equations. It is well known that geometric regulation can be highly sensitive to system parameters and hence such designs are not always robust. In particular, when employing numerical approximations to delay …
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Stability Analysis and Stabilization of Linear Systems with Distributed Delays
… analysis and stabilization of linear systems with non-trivial distributed delays based on the application of the Liapunov-Krasovskii functional (LKF) approach. We first propose methods for designing a dissipative state feedback controller for linear distributed delay systems, where the …
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Difference Methods for Stiff Delay Differential Equations
Delay differential equations of the form y'(t) = f(y(t), z(t)), where z(t) = {y(,1)((alpha)(,1)(y(t))),..., y(,n)((alpha)(,n)(y(t)))}('T) and (alpha)(,i)(y(t)) (LESSTHEQ) t arise in many scientific and engineering fields when transport lags and propagation times are physically significant in a …
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Cooperative control of multi-agent systems with time-delays
… cooperative control algorithms for multi-agent systems with time-delays. The first one is Robust Sliding-Mode Cooperative Control for Multiple Time-Delay Systems with Model Uncertainties and Disturbance, in which, it designed a sliding mode cooperative control law for a general time-delay system …
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Robust Control of Input-Delay Linear Parameter-Varying (LPV) Systems
Practical systems are nonlinear and time-varying and thus linear techniques can expose their control design to extra conservatism. Nevertheless, the Linear Parameter-Varying (LPV) representation can effectively describe them, which in contrast to linearization, maintains the principal dynamic modes …
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Stability and robustness of adaptive controllers for underactuated Lagrangian systems and robotic networks
… control framework for underactuated Lagrangian systems and robotic networks. In particular, an adaptive control framework is designed for a manipulator, which operates on an underactuated dynamic platform. The framework promotes the use of a filter in the control input to improve the system …
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Robust adaptive control of uncertain nonlinear systems
… control is investigated for uncertain nonlinear systems. The main purpose of the thesis is to develop adaptive control strategies for several classes of general nonlinear systems in strict-feedback form with different uncertainties including unknown parameters, unknown nonlinear systems …
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Consensus in multi-agent systems with time-delays
Different consensus problems in multi-agent systems have been addressed in this thesis. They represent improvements with respect to the state of the art. In the first part of the thesis in luding Chapters 2, 3, and 4, the state of the art of the representation and stability analysis of consensus …
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