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A drive for Brushless DC motor (BLDCM), which is fully based on the adaptive fuzzy controllers, is presented in this paper. One of the fuzzy controllers is used in the speed feedback loop to guarantee the accurate speed control. The other fuzzy controller is used in the current feedback loop to track the current change. The proposed full adaptive fuzzy controllers have the characteristics of robustness,...
This paper proposes a robust hybrid anti-islanding method for Inverter-based Distributed Generation (DG). This method is based on Active and passive detection techniques. Active anti islanding technique generates disturbances at the output of the distributed generation by Positive feedback and Continuous feedback signal injection which is based on DQ implementation. On the other hand passive anti...
Aimed at the inter-area low frequency oscillation in interconnected power system, the Wide-area PSS considering the time-delay of feedback signals is designed in this paper. The Wide-area PSS is composed with two-channel, the inputs of one channel are local signals without time-delay, the inputs of the other one are global signals with time-delay. Then the state equations of the closed-loop system...
This paper deals with the problem of stochastic robust asymptotically stability for a class of uncertain stochastic nonlinear time-varying systems with time-delays. The parametric uncertainties are assumed to be time-varying and norm bounded. The time-delay factors are unknown and time-varying with known bounds. The aim of this paper is to design a memory less state feedback control law such that...
This paper is aimed at robust control of a Permanent magnet DC motor based actuator used in the control of the inlet swirl valve of a diesel engine. The actuator has uncertainty issues related to parameter identification and variation, and load disturbance. These issues lead to faults in controllers, resulting in poor performance and failure. The actuator has been modeled taking parameter uncertainties...
The optimal control algorithm of first-order time-delay plant is used based. The observer is applied to the first-order plant with Time-Delay in feedback loop. The analysis of the robust stability is given. The conditions for robust control are given. The robust control upper limit and parameters are explored. The simulation results show that time-delay systems controlled by this method has good robustness...
For the decentralized robust stabilization of the interconnected large-scale descriptor system with uncertain output coefficient matrix that is time invariant, value-bounded (the value bound relatively small), the paper, with the linear matrix inequality (LMI) theory and the infinitesimal theory, gives the sufficient conditions respectively for the robust stabilization of the output feedback of the...
The problem of robust H2/H∞ static output feedback control is investigated for a class of uncertain discrete-time fuzzy systems. By using basis-dependent Lyapunov function, a general mixed H2/H∞ performance criterion is proposed, which separates Lyapunov matrices from system matrices. Based on this, a sufficient condition for the existence of robust H2/H∞ fuzzy static output feedback controller is...
A semi-active control heave compensation system is proposed, according to the requirements of 6000m deep sea poly-metallic mining system. The heave compensation system is acted upon by interacting of dynamic vibration absorber with accumulator. Magneto-rheological damper is act upon actuator to take semi-active control of heave compensation system. The composition and principle of the heave compensation...
The problem of non-fragile static output feedback control for a class of fuzzy bilinear systems is proposed. Based on the Lyapunov stability, the sufficient conditions are derived such that the closed-loop system is asymptotically stable in the presence of the additive controller gain perturbations. The stabilization conditions are further formulated into relaxed linear matrix inequalities (LMI)....
The robust output feedback stabilization problem for uncertain discrete-time Markov jump descriptor systems with time-varying delays is discussed. Based on the restricted system equivalent (r.s.e.) transformation and by introducing new state vectors, the discussed system is transformed into a discrete-time Markov jump standard linear system with time-varying delays. Then by discussing the transformed...
A hybrid control scheme is proposed which combines the intelligent sliding mode control and vibration control. Considering the movement of flexible and rotating parts imposes large disturbances on the satellite, and affects the pointing accuracy and stability of attitude, a sliding mode controller is used to eliminate attitude error and ensure system stability. Self-recurrent wavelet neural network...
This paper applies an effective repetitive controller to the Static Synchronous Compensator (STATCOM). This hybrid controller integrated repetitive control with proportional feedback control. This approach can decrease steady-state error and improve robustness. A detailed design method is presented and the mathematical model is introduced. The simulation results demonstrate the validity of the proposed...
We present the Colored Power algorithm, which is designed to provide collaborative electricity demand shaping for residential and small-business customers. Demand shaping for this market sector is an important and challenging problem, since the vast number of such customers collectively account for a large fraction of total electricity consumption, yet each individual's consumption is small. Under...
This paper is concerned with the problem of H∞ static output feedback (SOF) control of two-dimensional (2-D) discrete systems described by the Roesser model. By applying the 2-D Bounded Real Lemma, a design criterion for the 2-D H∞ SOF controller is derived. Since the existence condition for the SOF controller is not expressed strictly in terms of linear matrix inequalities (LMIs), then an iterative...
This paper proposes a new analytical method for the stability and the control performance of a robust model reference adaptive control system (MRACS). In order to show the uniform boundness of the input and output (I/O) signals of controlled object, the past typical studies evaluate the upper bound of many signals related to the I/O signals with a certain norm, and substitute those inequalities recursively...
We motivate and propose an alternative criterion for the dynamical control of regularization in the context of the standard RLS algorithm. The proposed criterion explores the fact that in finite precision the numerical solution of a regularized linear system of equations may be closer to the analytical (unknown) solution of the original (unregularized) system than the numerical solution of the latter...
This paper proposes multivariable robust control for a gait trainer for people with walking disability. The gait trainer composes of linkages and motors, which drive the linkages to produce preferred gait traces. To simplify the traditional motor control, the tracking error and motor current are feedback for control design to regulate the motor voltage. First, the transfer function matrices of the...
In this paper, a robust proportional-integral-derivative (PID) feedback compensator is designed for a low power radio-frequency (RF) amplifier, using Kharitonov's theorem. The robust D-stability concept is used to achieve robust performance by clustering the characteristic polynomial equation roots of the closed loop system in a specified angular region. Then, the controller is realized and the obtained...
In this paper, we advance a nonlinear control design concept based on backstepping, adjusted so that it might be used for a wider class of dynamical systems than the so-called strict-feedback form. Possible applications concern magnetic levitation systems, one of which will be used, in this paper, to design the proposed controller. Theoretical aspects regarding feasibility, stability and optimality...
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