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

A control method and servo motor technology, applied in motor generator control, AC motor control, electronic commutation motor control, etc., can solve problems such as low dynamic response capability, poor control accuracy, and system instability, and improve dynamic response ability, eliminate performance impact, strong robustness effect

Inactive Publication Date: 2014-01-22
SOUTHEAST UNIV
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  • Application Information

AI Technical Summary

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 contr

Method used

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

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Example Embodiment

[0025] The present invention will be further explained below in conjunction with the drawings.

[0026] Such as figure 1 Shown is a linear servo motor control method for driving a CNC machine tool. The control method controls a sine wave linear motor through a feedback signal detection module, a position control loop, a speed control loop, and a current control loop. The feedback signal detection module includes A position detection module, a speed detection module and a current detection module; the current detection module adopts a current transformer, and the position detection module adopts a grating ruler.

[0027] The specific control method includes the following steps:

[0028] (1) The position detection module compares the detected real-time displacement signal x of the mover with the positioning signal x * Compare, generate displacement error Δx, and transmit displacement error Δx to the position control loop as the input signal of the position control loop;

[0029] (2) Th...

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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...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P25/06
Inventor 余海涛张笑薇孟高军须晨凯陈洁琳闻程
Owner SOUTHEAST UNIV
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