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Control method of sine wave linear motor for feed driving of high-precision numerical control machine

A technology of CNC machine tools and linear motors, which is used in motor generator control, generator control, electronic commutation motor control, etc. The effect of improving stability and precision, and improving dynamic responsiveness

Active Publication Date: 2011-02-16
JIANGSU ZHONGRONG ELECTRIC
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Problems solved by technology

[0004] In order to overcome the problems of system instability, poor control accuracy and low dynamic response ability under the influence of external disturbance in the direct feed drive control system

Method used

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  • Control method of sine wave linear motor for feed driving of high-precision numerical control machine
  • Control method of sine wave linear motor for feed driving of high-precision numerical control machine
  • Control method of sine wave linear motor for feed driving of high-precision numerical control machine

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Embodiment Construction

[0023] A control method of a sine wave linear motor for high-precision numerical control machine tool feed drive according to the present invention, specifically comprising the following steps:

[0024] The motion trajectory tracking module compares the generated displacement reference command with the collected real-time displacement signal, and transmits the generated displacement error E and error change rate dE to the position control loop;

[0025] The position control loop adopts the self-adaptive fuzzy control algorithm. Firstly, the two input quantities are fuzzified, and the fuzzy inference is carried out by using the product reasoning machine according to the established fuzzy rules. After defuzzification, the output of the fuzzy controller can be obtained; at the same time, the displacement The reference command is also compared with the real-time displacement signal collected by a second-order reference model, and the generated displacement error is used to correct ...

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Abstract

The invention discloses a control method of a sine wave linear motor for feed driving of a high-precision numerical control machine, comprising the specific steps as follows: a motion trail tracking module transmits the generated displacement error E and the error change rate dE to a position control loop; the position control loop adopts a self-adaption fuzzy control algorithm, and the output speed amount of the fuzzy controller and the measured speed signals are compared and transmitted to a speed control loop; the speed control loop transmits the generated error signal and the d-axle component error signals to a current control loop; the current control loop controls the current output by an inverter by using a space vector PWM (Pulse-Width Modulation) technology with a PI (Proportional-Integral) regulator so as to control the output torque of the motor; a feedback signal detection module outputs the feedback signals to the current control loop and regulates the output torque of the motor. The invention combines self-adaption control, fuzzy control and vector control of an alternative-current motor together, and improves the stability, the accuracy and the dynamic response capacity of a linear servo motor.

Description

technical field [0001] The invention relates to a control method of a linear servo motor for high-precision numerical control machine tool feed drive, specifically a vector control method of a linear servo motor with an adaptive fuzzy control algorithm. Background technique [0002] At present, due to the increasing demand for speed, acceleration, precision and working stroke in the field of CNC machining, new CNC machine tools gradually tend to use linear motors as feed drive motors to replace the traditional "rotary servo motor + ball screw". the way of feeding. 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 considering the changes of various parameters of the linear motor during work and the influence of uncertain factors in the control system, this is Higher requirements are placed on the control of linear motors. [0003] The sine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/18H02P21/20
Inventor 孙国平余海涛周士贵冯四平姜崇学朱斌
Owner JIANGSU ZHONGRONG ELECTRIC
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