This paper presents experimental results for two adaptive nonlinear controllers applied to a variable reluctance motor (VRM). The rst controller requires both rotor position and velocity (full state) feedback, while the latter is an observer-based backstepping-type output feedback controller, requiring only rotor position measurement. Velocity for the full-state controller is estimated using a ...

This paper considers the problem of robust passive control for uncertain discrete systems with time-varying delays. We pay attention to designing a state feedback controller which guarantees the passivity of the closed-loop system for all admissible uncertainties. In terms of a linear matrix inequality, a sufficient condition for the solvability of this problem is presented and the explicit exp...

This paper present a new effective algorithm for the optimal realization of state estimate feedback controller structures for discrete time systems subject to FiniteWord-Length (FWL) constraints. The problem is formulated as a nonlinear programming to provide an easy and efficient optimization tool to solve such complex problem. Simulation results of the optimum realizations of state estimate f...

This paper studies output feedback control of pure-feedback systems with immeasurable states and completely non-affine property. Since availability of all the states is usually impossible in the actual process, we assume that just the system output is measurable and the system states are not available. First, to estimate the immeasurable states a state observer is designed. Relatively fewer res...

In this paper, we develop two new model reference adaptive control (MRAC) schemes for a class of nonlinear dynamic systems that is robust with respect to an uncertain state (output) dependent nonlinear perturbations and/or external disturbances with unknown bounds. The design is based on a controller parametrization with an adaptive integral action. Two types of adaptive controllers are conside...

The problem of state nullification of switched systems is studied. Specifically, we study the possibility to steer the state of a single-input singleoutput linear switched system to the origin in finite time by output feedback with finite memory. We show that if the system is in a controller canonical form, a causal state nullifying controller exists. We also show that, generically, only acausa...

Decentralized controller design problem for linear time-invariant retarded commensurate-time-delay systems is considered. The continuous pole placement algorithm, which has recently been introduced for static state vector feedback controller design for retarded time-delay systems, is first extended to design dynamic output feedback controllers. This algorithm is then used in the proposed decent...

In this paper a new integrated observer-based fault estimation and accommodation strategy for discretetime piecewise linear (PWL) systems subject to actuator faults is proposed. A robust estimator is designed to simultaneously estimate the state of the system and the actuator fault. Then, the estimate of fault is used to compensate for the effect of the fault. By using the estimate of fault and...

In this paper Hybrid Direct Neural Controller (HDNC) with Linear Feedback Compensator (LFBC) has been developed. Proper initialization of neural network weights is a critical problem. This paper presents two different neural network configurations with unity and random weight initialization while using it as a direct controller and linear feedback compensator. The performances of these controll...

in this paper, an adaptive fuzzy control scheme is proposed for a class of perturbed strict-feedback nonlinear systems with unknown discrete and distributed time-varying delays, and the proposed design method does not require a priori knowledge of the signs of the control gains.based on the backstepping technique, the adaptive fuzzy controller is constructed. the main contributions of the paper...