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 17 of 17 for “"Switched linear systems"”.
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Observability and observer design for switched linear systems
<p>Hybrid vehicles, HVAC systems in new/old buildings, power networks, and the like require safe, robust control that includes switching the mode of operation to meet environmental and performance objectives. Such switched systems consist of a set of continuous-time dynamical behaviors whose …
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Stability of non-diagonalizable switched linear systems on time scales.
This thesis investigates the stability of switched linear systems on time scales using Lyapunov stability theory. First, we focus on the most general case, nondiagonalizable systems with arbitrary switching. Subsequently, a constrained switching case is investigated. Several examples are given for …
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Topological entropy bounds for switched linear systems with lie structure
… into bounds for topological entropy of switched linear systems. Entropy measures, roughly, the information needed to describe the behavior of a system with finite precision on finite time horizons, in the limit. After working out entropy computations in detail for the scalar switched …
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Fault detection and isolation in switched linear systems and applications
… a fault detection and isolation (FDI) method for switched linear systems. The method builds on a class of FDI filters for linear time-invariant (LTI) systems based on reduced-order observers. If certain conditions are satisfied, then it is possible to apply these filters to switched linear …
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A convex solution to receding horizon control of switched linear systems
The uniform stabilization of discrete-time switched linear systems subject to a strongly connected switching constraint is exactly solved for finite-path-dependent controllers with finite horizon knowledge of future switching modes. Conditions for the existence of both a full-information …
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Observer-based fault detection and isolation for motor drive inverters
… be used for fault detection and isolation for switched linear systems. A state observer is constructed based on the physical system. Changes in the observer error are monitored to detect specific types of faults. This thesis uses the mathematical basis to offer a generic format that can be …
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Piecewise smooth systems and monotonicity.
In this thesis we study piecewise smooth and switched positive systems and investigate the monotonicity properties of such systems. We describe many examples of such systems, particulary drawing from the mathematical biology literature, in order to motivate the work in later chapters. We describe …
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Machine Learning Modeling and Robust Model Predictive Control of a Wind Turbine
… for large-scale wind turbines, demand on control systems is significantly increased. Control systems improve the capability of the turbine to efficiently capture wind energy and increase its lifespan. The aim of this research is to develop a comprehensive model-based controller for a wind turbine. …
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Switched and hybrid systems with inputs: small-gain theorems, control with limited information, and topological entropy
… thesis, we study stability and stabilization of switched and hybrid systems with inputs. We consider primarily two topics in this area: small gain theorems for interconnected switched and hybrid systems, and control of switched linear systems with limited information. First, we study …
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Modeling and Control of an Active Dihedral Fixed-Wing Unmanned Aircraft
Unmanned aircraft systems (UAS) often encounter turbulent fields that perturb the aircraft from its desired target trajectory, or in a manner that increases the load factor. The aircraft's fixed dihedral angle, providing passive roll-stiffness, is often selected based on lateral-directional …
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Receding-horizon switched linear system design: a semidefinite programming approach with distributed computation
… analysis and controller synthesis problems for switched linear systems. These are multi-modal systems whose parameters vary within a finite set according to the state of a discrete time automaton; the switching signal may be unconstrained or may be drawn from a language of admissible switching …
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Control and estimation of hidden mode hybrid systems with applications to autonomous systems
Hybrid systems are a modeling framework that allows for the combined consideration of continuous and discrete state dynamics. They are described by a finite collection of continuous systems, with each of these continuous dynamics corresponding to discrete modes of operation. Hidden mode hybrid …
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Design verification of power electronics systems subject to bounded uncertain inputs
… for design verification of power electronics systems subject to bounded uncertain inputs. In this method, the power electronics system, which consists of the power electronics converter circuit and the associated controller, is described by a switched-linear state-space representation, where …
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Algebraic relaxations and hardness results in polynomial optimization and Lyapunov analysis
… for certifying stability of uncertain and nonlinear dynamical systems. We show that deciding asymptotic stability of homogeneous cubic polynomial vector fields is strongly NP-hard. We settle some of the converse questions on existence of polynomial and sum of squares Lyapunov functions. We …
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Team decision theory of switched static and dynamic systems
… considers the decentralized control of switched linear systems with parameter dependent cost and system matrices. This problem class is investigated under a number of different formulations of player information structure, performance criteria and switching architecture. Such …
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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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Invertibility and observability of switched systems with inputs and outputs
Hybrid dynamical systems or switched systems can operate in several different modes, with some discrete dynamics governing the mode changes. Each mode of operation is described by a dynamical subsystem having an internal state, an external input (which can be thought of as a disturbance or a …