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 348 for “"Nonlinear Systems"”.
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Adaptive Identification of Nonlinear Systems
… techniques for parameter identification for nonlinear systems. The methods presented are expanded from those presented in Adetola and Guay [3, 4, 5] and are intended to improve the performance of existing adaptive control systems. The first two methods exactly recover open-loop system …
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Resonant Forcing of Nonlinear Systems
We include the additional constraint that only select degrees of freedom be forced, corresponding to a very general class of problems in which not all of the degrees of freedom in an experimental system are accessible to forcing. We find that certain Lagrange multipliers take on a fundamental …
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Adaptive control of nonlinear systems
In the last few years, adaptive control of nonlinear systems has emerged as an important area of research, with possible applications in areas as diverse as robotic systems, electric motors, chemical processes, and automotive suspensions. Many of the existing results employ design methods and proof …
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Contraction analysis of nonlinear systems
This thesis derives new results in nonlinear system analysis using methods inspired from fluid mechanics and differential geometry. Based on a differential analysis of convergence, these results may be viewed as generalizing the classical Krasovskii theorem, as well as linear eigenvalue analysis. …
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A theory of nonlinear systems
Introduction: A physically realizable nonlinear system, like a linear one, is a system whose present output is a function of the past of its input. We may regard the system as a computer that operates on the past of one time function to yield the present value of another time function. …
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Experimental Identification of Nonlinear Systems
… excitation in experimentally identifying the nonlinear parameters of a model approximating the response of a cantilevered beam by a single mode. The model accounts for cubic inertia and stiffness nonlinearities and quadratic damping. The method of multiple scales is used to determine the …
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Spline based controller for nonlinear systems
… apply spline theory to implement controllers for nonlinear systems. Two different systems, forced Duffing oscillators and power systems, are investigated. The spline method is used to mimic the controller which drives a state of the Duffing system toward a desired path. The spline-based nonlinear …
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Robust Control of Stochastic Nonlinear Systems
… optimization problem for a class of stochastic nonlinear systems in strict-feedback form, where in addition to the standard Wiener process there is a norm-bounded unknown disturbance driving the system. The bound on the disturbance is a stochastic integral quadratic constraint, and it is also …
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Modeling and control of nonlinear systems
… thesis two separate problems in the theory of nonlinear systems are studied. The first problem concerns the control of nonlinear systems. A model-based control method for nonlinear systems is presented and a number of problems related to its applicability are explored. An application of the …
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Model order reduction for nonlinear systems
… model order reduction for a general type of nonlinear systems. Based on quadratic or even higher degree approximation and tensor reduction with assistance of Arnoldi type projection, we demonstrate a much better accuracy for the reduced nonlinear system to capture the original behavior than …
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Robust Control for Hybrid, Nonlinear Systems
… the robust control theories of stopping-time nonlinear systems and switching-control nonlinear systems. We formulate a robust optimal stopping-time control problem for a state-space nonlinear system and give the connection between various notions of lower value function for the associated game …
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Adaptive Output Feedback Stabilization of Nonlinear Systems
… output feedback controller design techniques for nonlinear systems subject to different system restrictions. The problem of controlling the heart dynamics in a real time manner is formulated as an adaptive learning output-tracking problem. For a class of nonlinear dynamic systems with unknown …
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Addressing nonlinear systems with information-theoretical techniques
The study of experimental recording of dynamical systems often consists in the analysis of signals produced by that system. Time series analysis consists of a wide range of methodologies ultimately aiming at characterizing the signals and, eventually, gaining insights on the underlying processes …
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Robust adaptive control of uncertain nonlinear systems
… adaptive 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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On Observer-Based Control of Nonlinear Systems
… states instead of the true ones. For linear systems, the separation principle assures stability for the use of converging state estimates in a stabilizing state feedback control law. In general, however, the combination of separately designed state observers and state feedback controllers …
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Periodic Solutions in Higher Order Nonlinear Systems
Made available in DSpace on 2014-12-04T21:02:40Z (GMT). No. of bitstreams: 1 0009141.pdf: 2815870 bytes, checksum: 0594708855464ad0f3eaeaf41edf8a18 (MD5) Previous issue date: 1954
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Fluid-structure interaction in noisy nonlinear systems
… from the homogenized one-dimensional stochastic nonlinear system for both parametric and combined excitations; in turn revealing the weak convergence of this homogenization procedure. Additionally, the top Lyapunov exponent of the homogenized system is found analytically and compares well with …
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