ZOLEZZI , Tullio

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States of nonlinear sliding mode control systems are considered, which approximately verify the sliding condition on the unbounded time horizon. If the equivalent control achieves uniform exponential stability, it is shown that such (real) states are ultimately bounded with arbitrarily small bound, provided the sliding error is sufficiently...

Sliding mode control of ordinary dierential equations is considered. A key robustness property, called approximability, is studied from an optimization point of view. It is proved that Tikhonov well-posedness of a suitably dened optimization problem is intimately related to approximability. Making use of this link, new approximability...

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The behavior of condition numbers for free optimization problems under perturbations is considered in the innite - dimensional setting. Semicontinuity properties via distance to ill - conditioning are obtained. Convergence theorems of the condition numbers are proved under variational convergence of the perturbed problems and suitable behavior...

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Si studia il controllo di un sistema meccanico basato su tecniche del tipo superficie di scivolamento. Si applica il metodo del simplesso al controllo di sistemi meccanici controllati da azioni monodirezionali.

Si considera il controllo di un sistema non lineare con una prescritta superficie di scivolamento. La legge di controllo è basata sulla costruzione di un simplesso di vettori ad angli ottusi nello spazio tangente alla varietà di scivolamento. Si prova la convergenza del metodo.

A multi-input sliding mode control technique, called the simplex method, is presented. Multi-input sliding mode control for nonlinear uncertain system is a generalization of standard single input variable stucture control (VSC). An effective mode to extend the variable structure control technique to the multi-input case is based on a set of m+1...