Design, Modeling And Control Method Study Of Precision Grinding Machine Control System

Precision machining is the leading field of modern machining technology; it is essential in sophisticated products research and manufacture. With the development of engineering level, the requirement of precision in manufacture is higher. Motion control system plays an important role in positioning and machining as a significant part of machine tool, and it has an immediate impact in processing quality and efficiency. This article researched the precision machining and grinding facility control system based on machining requirement.This article designed an professional machine tool control system according to the requirement of the machining precision and surface roughness requirement. Build a dual CPU numerical control system composed by IPC and motion controller, and Galil DMC 1846 is the core unit of the system. The control program and supervisory computer software were coded by interactive principle between IPC and DMC 1846; for the dual stations integrated structure, servo systems, servo motors, servo controllers and transmission mechanism were confirmed.For the precision measurement and grinding, the dynamic property is the fatal determinant of servo system. So a triple tandem closed-loop control system was been structured. A simple modeling method based on data identification model was proposed, and the model parameter was calculated by method of least squares to solve the inestimable issue, and the new method can also optimize the PID controller parameter; at last the PID, feed forward and low pass filtering control is been considered in the control system.In the continuous processing, the following features of the equipment should be good enough to make the actual trajectory as close as possible of the given program trajectory, namely it must have high profile with dynamic accuracy. Following error is the main factor of the contour error, this paper used the speed feed-forward compensation method to suppress contour error, and an actual feed-forward method determined by the speed parameters was given. The experiment validate the method can effectively improve the machining accuracy.