W. Kryszewski et P. Zezza, REMARKS ON THE RELAY CONTROLLABILITY OF CONTROL-SYSTEMS, Journal of mathematical analysis and applications, 188(1), 1994, pp. 45-65
For a control process governed by a differential equation a special co
ntrollability property is studied. We consider relay controls, that is
, piecewise constant scalar controls whose absolute value is constant,
and we give sufficient conditions for the controllability by means of
relay controls with a minimum number of switches or with a constant a
mplitude. (C) 1994 Academic Press, Inc.