Abstract

This article studies the time-optimal output transition problem to change the system output, from an initial value y ( t ) = y ¯ (for all time t ≤ 0 ) to a final value y ( t ) = y ¯ (for all time t ≥ T ), for invertible nonlinear systems. The main contribution of the article is to show that the use of pre- and post-actuation input outside the transition interval I T = [ 0 , T ] can reduce the transition time T beyond the standard bang–bang-type inputs for optimal state transition. The advantage of using pre- and post-actuation is demonstrated with an illustrative nonlinear example.

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