Conditions on input disturbance suppression for multivariable nonlinear systems on the basis of feedforward passivity

Publication Type:
Journal Article
International Journal of Systems Science, 2006, 37 (4), pp. 225 - 233
Issue Date:
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In this paper, we consider the problem of input disturbance suppression for nonlinear systems based on feedforward passivity. First, we show that integral control can sufficiently suppress a class of slowly variant (including constant) input disturbance and track constant references provided certain closed-loop stability is achieved. Then, sufficient conditions of integral controllability for nonlinear processes are presented. These conditions are further relaxed by using an input and output transformation.
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