This paper addresses the control of linear systems with input saturations. We seek a controller that guarantees for the closed loop system: (i) stability for a given polytope of initial conditions, (ii) a prescribed weak L 2 gain attenuation between inputs and outputs of interest. Two approaches are proposed based on: (i) ensuring that the controller never saturates: the obtained controller is ...

In this paper we will deal with the control and stability analysis of the relative translation of a formation of spacecraft. A continuous control algorithm with no velocity information will be presented, for which strong stability properties can be proved even under non-vanishing disturbances. As propulsion systems of spacecraft usually do not provide continuous actuation, such results, reporte...

It is well-known that using the standard completion of the squares (CoS) formula for the LQ regulator problem, the H∞ controller derivations and associated H∞ controller existence conditions can be directly obtained. In standard theory for general H∞ output-feedback control and in the associated software, certain preliminary “loop-shifting” transformations are needed which it turns out add unne...

in this paper, genetic algorithms (gas) are employed to control simultaneous linear systems in both state and output feedback. first, the similarity transformation is applied to obtain parameterized controllers. this requires solution of a system of equations and also some non-linear inequalities. gas are used to solve these equations and inequalities. therefore, the paper presents an analytica...

In this paper, an Output Feedback Model Predictive Control for nonlinear systems is presented. The proposed output feedback control consists of the well known robust controller NCGPC (Nonlinear Continuous Time Generalized Predictive Control) and an open loop observer (a simulated model in parallel) in order to estimate the output derivatives and a regulation filter used to account for plant/mod...