Laser microstructure machining machine tool repeated positioning control method and machine tool control system

Abstract

The invention relates to a laser microstructure machining machine tool repeated positioning control method. The method comprises a step of acquiring configuration information of a machine tool workbench, wherein the configuration information comprises a movement track, a speed and an acceleration of the machine tool workbench, a step of establishing a mathematical model of a machine tool transmission link and calculating ideal values of the rotating speed and the acceleration of each servo motor in combination with the configuration information, a step of reading actual values of the rotatingspeed and the acceleration of each servo motor, comparing the actual values with ideal values to obtain setting parameters of speed and acceleration composite feedforward compensation, and obtaining afeedforward compensation variable, a step of acquiring a feedback control variable, and a step of compositing the feedforward compensation variable and the feedback control variable to form a controlvariable, wherein the machine tool workbench is used for clamping a to-be-machined workpiece, and the machine tool workbench can be driven by a servo motor set to horizontally move along an X axis and a Y axis relative to the machine tool and rotate around a theta axis. According to the invention, the repeated positioning precision of a laser microstructure processing machine tool can be greatlyimproved.

Description

technical field [0001] The invention relates to the technical field of laser micro-texture processing and automatic control, in particular to a repetitive positioning control method and a machine tool control system of a laser micro-texture processing machine tool. Background technique [0002] Laser processing technology has been widely used in various fields such as laser microtexturing because of its unique characteristics of accurately processing complex microstructures and requiring low processing conditions. The laser microtexturing 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 accuracy of the workpiece. However, in the process of laser surface microtexturing, there are problems such as high instantaneous speed and instantaneous acceleration of the machine tool, difficult to control positioning error and repeated positioning error, and inability to gua...

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:

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