A high gain observer is proposed for a class of multi-output nonlinear systems with unknown inputs in order to simultaneously estimate the whole state as well as the unknown inputs. The gain of this observer does not require the resolution of any dynamical system and is explicitly given. Moreover, its tuning is reduced to the choice of two real numbers. The performances of the proposed observer...

Understanding how performances vary across a large number of variants of a configurable software system is important for helping stakeholders to choose a desirable variant. Given a software system with n optional features, measuring all its 2 possible configurations to determine their performances is usually infeasible. Thus, various techniques have been proposed to predict software performance...

The problem of output regulation for nonlinear control systems with guaranteed transient performances in the presence of uncertainties is discussed, where the nonlinear systems are nonaffine in the control. The fast dynamical controller with the highest output derivative in feedback loop is used, where the controller is proper and can be implemented without ideal differentiation. Two-time-scale...

The concept of value has a great relevance in the definition and implementation of a performance management system in the context of cooperate networked production organisations. These new forms of organizations are, in many cases, still lacking suitable performance measures. Based on this idea, this paper we will discuss the problem of performance evaluation. Mainly we will discuss: How approp...

In this note, we investigate the problem of state feedback stabilization for affine nonlinear discrete-time systems. From a prescribed Lyapunov function, we introduce a modified Riccati equation so that the proposed state feedback law covers a large class of dynamical systems. In particular when the unforced dynamical model is not Lyapunov stable or when the system has unstabilizable first orde...

A high gain observer is proposed for a class of multi-output nonlinear systems with unknown inputs in order to simultaneously estimate the whole state as well as the unknown inputs. The gain of this observer does not require the resolution of any dynamical system and is analytically given. Moreover, its tuning is reduced to the choice of two real numbers. The performances of the proposed observ...