This short note points out an improvement on the robust stability analysis for electrically driven robots given in the paper. In the paper, the author presents a FAT-based direct adaptive control scheme for electrically driven robots in presence of nonlinearities associated with actuator input constraints. However, he offers not suitable stability analysis for the closed-loop system. In other w...

This paper summarizes the formulation of two distinct methods for high-bandwidth nonlinear adaptive flight control of an unmanned helicopter testbed, and presents an evaluation and comparison of the two controllers in both simulation and flight test when subject to unmodeled dynamics, time delay, and actuator position and rate saturation. The attitude command system functions as an inner loop, ...

Fault-tolerant constrained attitude controllers are proposed for flexible spacecraft in the presence of input saturation and actuator fault, as well as model uncertainty and external disturbance. Two input saturations, that is amplitude saturation and, amplitude and rate saturation are considered and simple and effective compensators are designed to deal with the effect of input saturation. Two...

This paper is concerned with the solution bounds for discrete-time networked control systems via delay-dependent Lyapunov–Krasovskii methods. Solution bounds are widely used for systems with input saturation caused by actuator saturation or by the quantizers with saturation. The time-delay approach has been developed recently for the stabilization of continuous-time networked control systems un...

This paper deals with the stability analysis and anti-windup design of discrete-time systems subject to actuator saturation. We present a new saturationdependent Lyapunov function to estimate the domain of attraction, which is then formulated and solved as a constrained LMI optimization problem. Further we propose an anti-windup compensation method to enlarge the domain of attraction in the pre...

This paper addresses the stabilization problem of singularly perturbed systems subject to actuator saturation. A solution in terms of linear matrix inequalities is proposed. The saturation is represented by means of a modified sector nonlinearity. The numerical problems due to the ill conditioning of the system model are avoided using a non-decoupling strategy. Some numerical results are also i...