This article addresses the robust output regulation problem for a class of nonlinear switched power converters after its linearization by means of a change of the control vector variable. The methodology employs a dynamic state feedback control law and considers parametric uncertainty due to unknown values of resistive loads. Restrictions arising from the fact that the control gains exhibit fix...

Abstract – This paper describes a novel structure for single phase Unified Power Quality Conditioner-Distributed Generation (UPQC-DG) with direct grid connected DC-AC converter for low DC output DG systems which can be used not only for compensation of power quality problems but also for supplying of load power partly. This converter has been composed of one full-bridge inverter, one three wind...

The convergence of model-free adaptive control MFAC algorithm can be guaranteed when the system is subject to measurement data dropout. The system output convergent speed gets slower as dropout rate increases. This paper proposes a MFAC algorithm with data compensation. The missing data is first estimated using the dynamical linearization method, and then the estimated value is introduced to up...

This paper studies the output-feedback stabilization problem for a class of networked control systems (NCSs) with a Markovian jump linear plant. By considering the time delays from the sensor to the controller and from the controller to the actuator, the closed-loop NCS is modeled as a system with three kinds of jumping modes. The sufficient conditions for the stochastic stability are establish...

The photovoltaic powered water pumping system investigated in this paper consists mainly of a photovoltaic generator, a boost converter, a three phase inverter, and an induction motor-pump. Then, we present a method which resolved directly on the bond graph the problem of input/output linearization of the nonlinear system while basing itself on input/output causal inversion of its BG model. Ana...

A bond graph model of a two degrees of freedom PUMA is described. System inversion gives the system input required to generate a given system output. In order to get the system inversion of the PUMA manipulator, a linearization of the nonlinear bond graph is obtained. Hence, the bicausality of the linearized bond graph of the PUMA manipulator is applied. Thus, the bicausal bond graph provides a...

This paper discusses the problem of using feedback and coordinates transformation in order to transform a given nonlinear system with outputs into a controllable and observable linear one. We discuss separately the effect of change of coordinates and, successively, the effect of both change of coordinates and feedback transformation. One of the main results of the paper is to show what extra co...

A review of the experimental evidence shows that passivitybased control of saturated induction motors does not provide superior performance over input–ouput linearization. Higher tracking errors can be observed and traced to the open-loop nature of the flux controller. In contrast, input–output linearization controllers achieve close tracking of flux, speed, and position references for the most...

The problem of stabilization by means of dynamic output feedback is studied for discrete-time delayed systems with possible interval uncertainties. The control is under positivity constraint, which means that the resultant closed-loop system must be stable and positive. The robust resilient controller is respect to additive controller gain variation which also belongs to an interval. Necessary ...

Attitude control law design for spacecraft large angle maneuvers is investigated in this paper. The feedback linearization technique is applied to the design of a nonlinear tracking control law. The output function to be tracked is the quaternion attitude parameter. The designed control law turns out to be a combination of attitude and attitude rate tracking command. The attitude-only output fu...