Journal ArticleDOI
Robust stabilization of uncertain linear systems: quadratic stabilizability and H/sup infinity / control theory
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In this paper, the problem of robustly stabilizing a linear uncertain system is considered with emphasis on the interplay between the time-domain results on the quadratic stabilization of uncertain systems and the frequency domain results on H/sup infinity / optimization.Abstract:
The problem of robustly stabilizing a linear uncertain system is considered with emphasis on the interplay between the time-domain results on the quadratic stabilization of uncertain systems and the frequency-domain results on H/sup infinity / optimization. A complete solution to a certain quadratic stabilization problem in which uncertainty enters both the state and the input matrices of the system is given. Relations between these robust stabilization problems and H/sup infinity / control theory are explored. It is also shown that in a number of cases, if a robust stabilization problem can be solved via Lyapunov methods, then it can be also be solved via H/sup infinity / control theory-based methods. >read more
Citations
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Journal ArticleDOI
Fixed-order scaled ℋ∞ synthesis
Tetsuya Iwasaki,Mario A. Rotea +1 more
TL;DR: In this paper, the authors proposed two algorithms to improve the robustness and robustness of a stabilizing fixed-order controller in the framework of the control problem with constant scaling.
Proceedings ArticleDOI
Convex analysis of discrete-time uncertain H/sub infinity / control problems
TL;DR: In this article, the quadratic stabilizability with uncertainties in convex bounded domains is studied and shown to be convex on the parameter space, assuming the state is available for feedback.
Proceedings ArticleDOI
H/sub /spl infin// output feedback control designs for T-S fuzzy dynamic systems via LMI
Liu Yiaodong,Zhang Qingling +1 more
TL;DR: New quadratic stability conditions are obtained by relaxing the stability conditions derived in previous papers and new output feedback H/sub /spl infin// fuzzy control design methods are developed based on a common Lyapunov function.
Journal ArticleDOI
Fixed-Order H∞ Controller Design for Systems with Polytopic Uncertainty
TL;DR: In this paper, sufficient conditions for fixed-order H∞ controller design for SISO systems with polytopic uncertainty were derived based on the concept of robust strict positive realness of an uncertain polynomial with respect to a parameter dependent polynomial.
Journal ArticleDOI
Uncertain linear systems
Bo Li,Yuanguo Zhu +1 more
TL;DR: An approach for solving some special uncertain linear systems is designed and conditions for the existence of a solution to an uncertain linear system are presented and two examples are given to show the effectiveness of the proposed approach.
References
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Journal ArticleDOI
State-space solutions to standard H/sub 2/ and H/sub infinity / control problems
TL;DR: In this article, simple state-space formulas are derived for all controllers solving the following standard H/sub infinity / problem: for a given number gamma > 0, find all controllers such that the H/ sub infinity / norm of the closed-loop transfer function is (strictly) less than gamma.
Journal ArticleDOI
A stabilization algorithm for a class of uncertain linear systems
TL;DR: In this paper, the authors present an algorithm for the stabilization of a class of uncertain linear systems, which is described by state equations which depend on time-varying unknown-but-bounded uncertain parameters.
Journal ArticleDOI
Least squares stationary optimal control and the algebraic Riccati equation
TL;DR: In this paper, the optimal control of linear systems with respect to quadratic performance criteria over an infinite time interval is treated, and the integrand of the performance criterion is allowed to be fully quadratically in the control and the state without necessarily satisfying the definiteness conditions which are usually assumed in the standard regulator problem.
Journal ArticleDOI
LQG control with an H/sup infinity / performance bound: a Riccati equation approach
TL;DR: In this article, an LQG (linear quadratic Gaussian) control-design problem involving a constraint on H/sup infinity / disturbance attenuation is considered, and an algorithm is developed for the full-order design problem and illustrative numerical results are given.
Journal ArticleDOI
Root locations of an entire polytope of polynomials: It suffices to check the edges
TL;DR: It is shown that the root locations of the entire family can be completely determined by examining only the roots of the polynomials contained in the exposed edges of the polytope.