Improvement to technologies for rear tracks returning automatically of milling machine
MENG Wenya, PENG Zhiwei
(Zoomlion Heavy Industry Science and Technology Co.,Ltd., Changsha 410000, China)
 

Abstract: Aiming at the awful precision and effect of rear tracks returning automatically of milling machine, characters of turning system, such as turning angle、turning speed、system lag and the response to a little cycles of output signals were researched, the relationship of turning angle and cylinder displacement of each side was established and the fitting of a curve of cylinder displacement and time was completed. A scheme of separate control of left and right returning was presented. An interior displacement sensor not prone to be disturbed was adopted, and grey prediction based on “less data” was proposed in returning close loop control. Grey Model GM(1,1) was tested and returning experiments under different conditions were taken. The results show that the prediction accuracy is over 99% and the control method based on grey prediction significantly improves the control precision、system stability and the capability of antijamming.
Key words: return automatically; turning speed; displacement sensor; grey prediction