Abstract: The paper addresses the problem of output feedback guaranteed cost controller design for NCSs with time-delay and polytopic uncertainties. By constructing a new parameter-dependent Lyapunov functional and applying the free-weighting matrices technique, the parameter-dependent, delay-dependent design method will be obtained to synthesize a PID controllers achieving a guaranteed cost su...

In variational CAD design, parametric models may fail to regenerate raising the question of which parameter values lead to valid models. The problem is easy to state but dif®cult to solve. Using a simpli®cation, we present an algorithm that computes for parametric models valid parameter ranges within which the model will regenerate. We explain also why the general problem is hard. q 2000 Elsevi...

Abstract. A feedback control-design problem involving structured plant parameter uncertainties is considered. Two robust control-design issues are addressed. The Robust Stability Problem involves deterministic bounded structured parameter variations, while the Robust Performance Problem includes, in addition, a quadratic performance criterion averaged over stochastic disturbances and maximized ...