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The Control of the Position Servo of the Linear Motor
ABSTRACT
Linear motor direct drive feed system cancel all intermediate transport segments£®It greatly improve the working accuracy and servo performance of the machine tool£¬Permanent magnet linear synchronous servo motor used high-energy permanent magnets£¬has thrust high strength£¬low loss£¬electrical time constant small£¬fast response and so on£®As a result£¬in recent years in high-grade numerical control machine tool to drive in by the application of a new generation CNC machine tools one of the main signs£®
In this paper£¬the research object is the position controller of a permanent magnet linear motor direct servo system£®Firstly£¬it describes linear motor basic structure£¬sets forth its working principle and related control strategy£®According to the performance requirement of the ultra-precision machine feed drive servo system and the characteristic of ¡°direct drive¡±£¬the control structure is designed£¬and the mathematical model of servo motor is established£®Then we design the position controller£®P-PI position controller and IP position controller are designed by engineering design plan£®By comparing, the exoterical analysis and simulation results show that use P-PI position controller can make the output on the trail of the input of the step signal better£®
Key words£ºServo linear motor Direct drive Position controller