Prediction-function-based variable-domain fuzzy PI control method of alternating current servo motor
A technology of AC servo motor and predictive function control, applied in electric controllers, controllers with specific characteristics, etc., can solve problems such as difficulty in fuzzy control rule design and insufficient control performance
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[0100] A variable universe fuzzy PI control method of AC servo motor based on predictive function, in which the AC servo motor speed control system based on PI control strategy adopts such figure 2 In the control structure shown, the motor is equivalent to a first-order transfer function Figure ω r Is the input command speed, ω is the feedback speed, i q Is the q-axis command current, K f Is the torque coefficient, J is the moment of inertia of the motor, B is the viscous friction coefficient, T l It is load disturbance including load torque, friction torque and cogging torque. Although the AC servo motor speed control system is a typical nonlinear complex system, it can be linearized without affecting the control effect. In this embodiment, the AC servo motor speed control system uses a first-order autoregressive model (ARX) to describe:
[0101] ω(t)=aω(t-1)+bi q (t-1) (12)
[0102] In formula (12), a and b are the model parameters to be identified. The influen...
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