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In ac/ac converter applications, the matrix converter has become increasingly attractive in recent years. The matrix converter is a single stage converter. It does not require any dc-link energy storage component. So, the structure only requires small mounting place because the braking resistance or regeneration converter is unnecessary. In addition, it has a high-power-factor sinusoidal input current...
This paper presents the design of an indirect adaptive fuzzy sliding mode controller for a vector controlled induction motor position servo drive. The proposed adaptive controller takes advantage of sliding mode control (SMC) and proportional integral (PI) control. The chattering effect is attenuated and robust performance can be ensured. Moreover, the upper bound of the discontinuous control term...
The nonlinear friction characteristics in line cylinder pneumatic servo control system are analyzed. The friction can be seen as the disturbance in the global sliding mode variable structure control (SMVSC). The system is robust during the whole response process, by changing controller structure or adjusting control parameters to suppress the disturbance. Numerical simulation shows that the SMVSC...
The paper presents a complete (animation, simulation and internet based measurement) multimedia educational program of DC servo system for distant learning. The animation program describes the basic operation of a DC motor, derives the torque-speed characteristics and explains the basic steps of control design. The animation program includes screens for teaching in class and for individual study as...
The problem of robustifying optimal linear quadratic regulator (LQR) is considered for a class of uncertain linear systems. First, an optimal controller is designed for the nominal system and an integral sliding surface is constructed. The ideal sliding motion can minimize a given quadratic performance index, and the reaching phase, which is inherent in conventional sliding mode control, is completely...
A fuzzy sliding mode controller for permanent magnet synchronous motor (PMSM) is designed to solve the chatting problem in this paper. The sliding mode controller based the assumption of known uncertainty bounds often cause the chattering phenomena in the control system. So a simple fuzzy controller with sliding mode technique is used to evaluate the uncertainty bounds of PMSM which are caused by...
Control of pneumatic servo systems is well-known to be challenge due to highly nonlinearities in the actuator dynamics and compressibility of the media. Most state feedback based strategies for the pneumatic servo systems require full state feedback to stabilize the closed loop system which implies the need for pressure measurements of the cylinder. Many researchers used state observers to complete...
A procedure for implementing a continuous controller, the output of which may vary within a continuous range of values, by means of a discrete controller, of which the output may only be given a discrete set of values, is presented. The theoretical development is based on the variable structure systems approach and is complemented with an analytical and experimental study of a position servomechanism...
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