In a finite-dimensional system, the optimal regulator satisfies the circle condition and has a large stability margin. By using a nonnegative functional composed of the solution of an infinite-dimensional Riccati equation, the stability conditions are derived for an optimal regulator of a system with time-delay in the case where errors occur in the time-delay. The stability margin is evaluated from the stability condition in the case where errors occur in the time-delay, and the condition is obtained for ensuring the existence of the circle condition which is the distinctive feature of the optimal regulator.
|ジャーナル||Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)|
|出版ステータス||Published - 1989 5月|
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