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 40 for “"robust stability"”.
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The robust stability of iterative learning control
This thesis examines the notion of the long term robust stability of iterative learning control (ILC) systems engaged in trajectory tracking, using a robust stability theorem based on a biased version of the nonlinear gap metric. This is achieved through two main results: <br/><br/>The first …
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Robust stability assessment for future power systems
Loss of stability in electrical power systems may eventually lead to blackouts which, despite being rare, are extremely costly. However, ensuring system stability is a non-trivial task for several reasons. First, power grids, by nature, are complex nonlinear dynamical systems, so assessing and …
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Robust stability of asynchronous multirate sampled systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Policy robustness : robust stability of multiclass queueing networks
Robustness has been a prominent topic for decades in the optimization literature. However, it is only a few years that robust techniques have been imported and further developed for stochastic models, particularly stochastic processing networks. A reason for this late adoption might be that …
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Robust stability analysis for large-scale power systems
… to increase variability and uncertainty, making stability verification more challenging. This thesis extends the technique of robust stability analysis to large-scale electric power systems under uncertainty. In the first part of this thesis, we examine the use of the technique to solve real …
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Robust stability of a class of nonlinear systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Networked Predictive Control Systems: Control Scheme and Robust Stability
… of NCS. Therefore, it makes the study of the robust control of NCS and that of networked nonlinear control system (NNCS) considerably important. This work studied the following three problems: the robust control of networked predictive linear control systems, the control scheme for networked …
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Robust stability and performance for multiple model switched adaptive control
… the first of its kind to provide comprehensive robustness and performance guarantees for a multiple model control algorithm, in terms of lp, 1 ? p ? ? bounds on the closed loop gain, and is applicable to the class of minimal MIMO LTI plants. A key feature of this bound is that it permits the …
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Robust stability and contraction analysis of nonlinear systems via semidefinite optimization
A wide variety of stability and performance problems for linear and certain classes of nonlinear dynamical systems can be formulated as convex optimization problems involving linear matrix inequalities (LMIs). These formulations can be solved numerically with computationally-effcient interior-point …
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Simplex-type variable structure controllers for stability and performance
This thesis considers the problem of guaranteeing robust stability as well as performance for plants that can be modelled as linear systems which are perturbed by nonmatching disturbances and parametric uncertainties. The use of simplex-type variable structure controllers (simplex controllers) is …
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Spatiotemporal systems: gradual variations, identification, adaptation and robustness
… important open research problems related to the stability, identi fication, adaptation and robustness of spatiotemporal systems. First, we consider the l_infinity stability of linear spatiotemporally varying (LSTV) systems when the underlying controllers are designed based on local linear …
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A continuous-time multi-stage noise-shaping delta-sigma modulator with analog delay
… This modulator provides high resolution and robust stability characteristics which are the primary advantages of the conventional multi-stage noise-shaping architecture. At the same time, previous critical challenges that degraded the overall performance of multi-stage noise-shaping …
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Studies in system representation and control
… Hilbert spaces in terms of closable operators. A robustly stabilizing controller stabilizes every member of the model class to which the given plant belongs. We show that if the model class is an open set in $H\sb\infty$, there is a necessary and sufficient condition for robust stability. But if …
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Stable, high-force, low-impedance robotic actuators for human-interactive machines
… endpoint impedance, but compromises coupled stability. The common standard for ensuring coupled stability, passivity, can limit performance severely. An alternative measure of coupled stability is proposed that uses limited knowledge of environment dynamics (e.g. a human limb) and applies …
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Robust adaptive control of switched systems
In this thesis, robust adaptive controllers are developed for classes of switched nonlinear systems. Switched systems are those governed by differential equations, which undergo vector field switching due to sudden changes in model characteristics. Such systems arise in many applications such as …
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Prominent Platforms for the Synthesis of Size-Controllable Polymeric Nanoparticles for Gene Delivery
… as a high payload, stable colloidal and storage stability, and versabtile functionalization.This study focuses on the development of novel PNP gene delivery platforms. The PNPs consist of perfluoroheptanoic acid (PFHA), polyethylenimine (PEI), and low molecular weight heparin (LHP). These …
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Design and validation of high speed active trailer steering system for articulated heavy vehicle
… A-train double. In order to increase the lateral stability of the A-train double, Active steering systems (ATS) have been designed through two methods: robust LQR-LMI method with genetic algorithm (GA) optimization and H∞ method. The designed controllers are validated by numerical simulation and …
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Robust Distributed Stabilization of Interconnected Multiagent Systems
… approach. This systematic framework guarantees robust stability and performance of the closed-loop multiagent systems. We validate these theoretical results through various simulation studies.</p>
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Stability of linear autonomous systems under regular switching sequences
In this work, we discuss the stability of a discrete-time linear autonomous system under regular switching sequences, whose switching sequences are generated by a Muller automaton. This system arises in various engineering problems such as distributed communication and automotive engine control. …
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Efficient computational methods for robustness analysis
Issues of robust stability and performance have dominated the field of systems and control theory because of their practical importance. The recently developed Integral Quadratic Constraint (IQC) based analysis method provides a framework for systematically checking robustness properties of large …
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