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Design and analysis of a hybrid control scheme for sandwich nonsmooth nonlinear systems

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3 Author(s)
Taware, A. ; Dept. of Electr. & Comput. Eng., Virginia Univ., Charlottesville, VA, USA ; Gang Tao ; Teolis, C.

This paper addresses an open control problem: the control of sandwich non-smooth nonlinear systems. Of interest are sandwiched non-smooth nonlinearities between linear dynamic blocks, as illustrated by a hydraulic valve system with a sandwiched dead-zone. A hybrid control scheme for the control of such sandwich systems is developed and presented in detail. The proposed control scheme employs an inner-loop discrete-time feedback design and an outer-loop continuous-time feedback design, combined with a nonlinearity inverse, to cancel the nonlinearity effect, for improving output tracking. The stability and tracking performance of the closed-loop control system are analyzed. Simulations are used to illustrate the effectiveness of the proposed hybrid control design

Published in:

Automatic Control, IEEE Transactions on  (Volume:47 ,  Issue: 1 )