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Minimum phase properties for input nonaffine nonlinear systems

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4 Author(s)
Nesic, D. ; Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia ; Skafidas, E. ; Mareels, I.M.Y. ; Evans, R.J.

For input nonaffine nonlinear control systems, the minimum phase property of the system in general depends on the control law. Switching or discontinuous controllers may offer advantages in this context. In particular, there may not exist a continuous control law which would keep the output identically equal to zero and for which the zero output constrained dynamics are locally stable, whereas a discontinuous controller which achieves this exists. For single-input/single-output input nonaffine nonlinear systems we give sufficient conditions for existence, and present a method for the design of discontinuous switching controllers which yield locally stable zero dynamics

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Automatic Control, IEEE Transactions on  (Volume:44 ,  Issue: 4 )