Elsevier

Automatica

Volume 28, Issue 3, May 1992, Pages 623-626
Automatica

Brief paper
On stabilization of nonlinear systems with enlarged domain of attraction,☆☆

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Abstract

This paper presents a systematic procedure to design a control law that guarantees asymptotic stability of an equilibrium with an enlarged domain of attraction for a class of nonlinear systems. To this end, we use a natural extension of well-known linear time-invariant transformation methods to write the system in controller canonical form with a forcing term. The control law is implemented in two steps, first we calculate a nonlinear state feedback that cancels the nonlinear terms of the unforced system, so that for the resulting system a suitable Lyapunov function candidate is available. Then, we add a linear state feedback that stabilizes the equilibrium and maximizes its domain of attraction. Interestingly enough, the latter maximization problem reduces to a classical, linear time invariant H minimization problem. An example is given to illustrate the procedure.

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The original version of this paper was not presented at any IFAC meeting. This paper was recommended for publication in revised form by Associate Editor A. Isidori under the direction of Editor H. Kwakernaak.

☆☆

The second author's work is sponsored by the Japan Society for Promotion of Science and Sophia University.

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