Sk. Spurgeon et R. Davies, A NONLINEAR CONTROL STRATEGY FOR ROBUST SLIDING MODE PERFORMANCE IN THE PRESENCE OF UNMATCHED UNCERTAINTY, International Journal of Control, 57(5), 1993, pp. 1107-1123
Citations number
8
Categorie Soggetti
Controlo Theory & Cybernetics","Computer Applications & Cybernetics
It is well known that sliding mode control schemes provide robustness
to the class of uncertainty acting within channels implicit in the con
trol inputs: the so-called matched uncertainty. However, the unmatched
uncertainty will affect the ideal dynamics prescribed by the chosen s
witching surfaces. This paper develops a control strategy to minimize
the effects of the unmatched uncertainty upon the dynamic performance
prescribed by the switching surfaces. This is achieved for a subclass
of the uncertainty class considered by previous authors. The practical
application of the control strategy to the design of a stability augm
entation system for a light aircraft is presented. For this problem an
ideal performance is well known and it is desirable that these ideal
dynamics are exhibited across a wide range of flight conditions withou
t degradation.