Linear servo motor control method for numerically-controlled machine tool driving

Abstract

The invention discloses a linear servo motor control method for numerically-controlled machine tool driving. According to the method, a sine wave linear motor is controlled through a feedback signal detection module, a position control ring, a speed control ring and a current control ring, and the feedback signal detection module comprises a position detection module, a speed detection module and a current detection module, wherein the position control ring adopts a composite control method combining PI (proportional-integral) feedback control and neural network given compensation control, the speed control ring adopts a fuzzy controller with a disturbance observer, and the current control ring adopts a space vector PWM (pulse-width modulation) technology with a PI regulator. The linear servo motor control method has the advantages that the neural network compensation PI control technology, the fuzzy control and the alternating current motor vector control are combined, and the anti-jamming capability, the dynamic response capability and the system stable state precision of a linear servo motor are improved.

Description

technical field [0001] The invention relates to a control method of a linear servo motor for feed drive of a high-precision numerical control machine tool, in particular to a vector control method of a linear servo motor with IP feedback control and fuzzy control. Background technique [0002] The linear permanent magnet AC servo system saves the mechanical transmission mechanism, connects the load directly to the mover of the permanent magnet linear synchronous motor PMLSM, and makes the control object and the motor into an integrated structure, eliminating some problems caused by the mechanical speed conversion mechanism. Adverse effects, such as elastic deformation of frictional mechanical backlash, have great advantages in the application of high-precision micro-feed servo systems. However, since the linear motor is directly connected to the processing tool, the disturbance and friction of the external load will be directly transmitted to the linear motor, and then consi...

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the problems of system instability, poor control accuracy and low dynamic response ability under the influence of external disturbances in the direct feed drive control system, the present invention provides an IP control with neural network compensation and fuzzy control Combined control method of sine wave linear servo motor, which combines adaptive control, fuzzy control and vector control of AC motor, can effectively overcome the influence of various disturbances and uncertainties on the control system, Capable of the stability, precision and dynamic response of a linear servo motor

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