A method for repetitive positioning control of laser micro-texture processing machine tools

Abstract

The invention relates to a method for controlling repetitive positioning of a laser microtexturing machine tool, comprising the following steps: acquiring configuration information of a machine tool workbench step by step, the configuration information including the movement track, speed and acceleration of the machine tool workbench; establishing a mathematical model of the machine tool transmission link , calculate the ideal values ​​of the speed and acceleration of each servo motor in combination with the configuration information; read the actual values ​​of the speed and acceleration of each servo motor and compare them with the ideal values ​​to obtain the setting parameters of the composite feedforward compensation of speed and acceleration , obtain a feedforward compensation variable; obtain a feedback control variable; combine the feedforward compensation variable and the feedback control variable to form a control variable; wherein, the machine tool table is used for clamping the workpiece to be processed; the machine tool table Driven by the servo motor group, it can move horizontally along the X-axis, Y-axis and rotate around the θ-axis relative to the machine tool. The invention can greatly improve the repeated positioning accuracy of the laser microtexturing machine tool.

Description

technical field [0001] The invention relates to the technical field of laser micro-texture processing and automatic control, in particular to a laser micro-texture processing machine tool repeat positioning control method and a machine tool control system. Background technique [0002] Laser processing technology has been widely used in various fields such as laser micro-texture processing because of its unique characteristics of accurately processing complex micro-morphological structures and requiring less processing conditions. The laser micro-texture processing system is a precise position tracking and positioning system, and its transmission and positioning accuracy play a key role in the processing quality and precision of the workpiece. However, in the process of laser surface microtexture processing, there are problems such as high instantaneous speed and instantaneous acceleration of the machine tool, difficult control of positioning error and repeated positioning e...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a speed and acceleration compound feedforward compensation PID control scheme for the laser micro-texture control system in order to overcome the above-mentioned problems of low system positioning accuracy, low repeat positioning accuracy, and reciprocating processing focus misalignment The error compensation of the servo drive link of the processing machine tool; the technical solution is as follows:

Images