Switching H2/H∞ Controller Design for Linear Singular Perturbation Systems

Subject Areas : Journal of Computer & Robotics

Ahmad Fakharian ¹ (Department of Electrical and Computer Engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran Department of Computer Science and Electrical Engineering, Control Engineering Group, Luleå University of Technology, Luleå, Sweden)

Received: 2009-12-24 Accepted : 2010-05-08 Published : 2012-06-12

Keywords: Continuous-time LTI singular perturbation system, Fuzzy supervisor, Switching H2/H∞ state-feedback control, Linear Matrix Inequality (LMI),

Abstract :

This paper undertakes the synthesis of a logic-based switching H2/H∞ state-feedback controller for continuous-time LTI singular perturbation systems. Our solution achieves a minimum bound on the H2 performance level, while also satisfying the H∞ performance requirements. The proposed hybrid control scheme is based on a fuzzy supervisor managing the combination of two controllers. A convex LMI-Based formulation of two fast and slow subsystem controllers leads to a structure which ensures a good performance in both transient and steady-state phases. The stability analysis leverages on the Lyapunov technique, inspired from the switching system theory, to prove that a system with the proposed controller remains globally stable in the face of changes in configuration (controller).

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