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This paper presents design of robust current controller. It takes the motor parameters as uncertain values. Comparing with other approaches it takes into account imprecision of decoupling which linearizes the motor model. The controller design uses error signals between coupling and decoupling terms and treats them as uncertainties. This approach preserves the linearity for the price of treating model...
In this paper, a Ziegler-Nichols (Z-N) based PID plus fuzzy logic control (FLC) scheme is proposed for speed control of a direct field-oriented induction motor (DFOIM). The Z-N PID is adopted because its parameter values can be chosen using a simple and useful rule of thumb. The FLC is connected to the PID controller for enhancing robust performance in both dynamic transient and steady-state periods...
Aiming at wide variations in loads and moment of inertia, large disturbed moment of a rocket launcher position servo system, a backstepping and sliding mode cascaded compound control method was present. The sliding mode variable structure controller of velocity loop and the backstepping controller of position loop were designed. The sliding mode control can restrain effects of parameter uncertainties...
Aiming at a complicated coupling and non-linear brushless DC motor (BLDCM) servo system, the conventional algorithms have many disadvantages, such as less precision, lower speed response. Taking the mechanical characteristics of BLDCM into consideration, an improved particle swarm optimization algorithm is presented in this paper, which is applied in the speed control of the Brushless DC Motor (BLDCM)...
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