This paper describes an approximated-scalar-sign-function-based anti-windup digital control design for analog nonlinear systems subject to input constraints. As input saturation occurs, the non-smooth saturation constraint is modeled with the approximated scalar sign function which is a smooth nonlinear function. The resulting nonlinear model is further linearized at any operating point with th...

RÉSUMÉ. Cet article présente une approche de résolution des problèmes d’optimisation multicritères basant su l’outil LMI. Notre objectif est de chercher un contrôleur stabilisant le système avec des contraintes fréquentielles et/ou temporelles. Cette conception est fondée sur la paramétrisation de Youla; cette paramétrisation est basée sur un contrôleur initial défini par la combinaison convexe...

Abstract The problem of stabilization of vertical, lateral and longitudinal dynamics for hover flight mode of an unmanned autonomous helicopter (UAH) in a gusty environment is considered. The controller design is based on a generic linear model which successfully describes the behavior of most small scale helicopters. A recursive (backstepping) design procedure is used to design the robust cont...

This paper proposes a load frequency control scheme for an autonomous hybrid generation system consisting of wind turbine generator (WTG), diesel engine generator (DEG), fuel cell (FC), aquaelectrolyzer (AE) and battery energy storage system (BESS). In wind power generation systems, operating conditions are changing continually due to wind speed and load changes, having an effect on system freq...

The paper presents a cross-coupling controller for a four-wheel steering mobile robot with independently actuated steering and driving of each wheel. The aim of the controller is to minimize slippage during transient states of the vehicle control. Linear approximation of the criterion for no slippage is adopted for the design of the LQR-based cross-coupling controller of steering actuators. Dri...

This paper proposes guaranteed cost design of robust output feedback controller for continuous linear parametric uncertain systems. New necessary and sufficient conditions for static output feedback stabilizability of linear continuous time systems underly the design procedure. Proposed algorithms are computationally simple and tightly connected with the Lyapunov stability theory and the LQR op...

Abstract A cascade technique with two control loops is designed for a DC \ Buck‐Boost converter that right half‐plane zero (RHPZ) structure called non‐minimum phase system. This concept presents several challenging constraints designing well‐behaved techniques. Cascade controllers can provide various benefits compared single loop such as higher safety, robustness, and stability. strategy assume...