锻压技术

基于误差反馈的双缸液压系统同步模糊PID控制系统设计

英文标题：Design on synchronous fuzzy PID control system for double-cylinder hydraulic system based on error feedback

作者：陈杰1 泮进明2

单位：1.盐城工业职业技术学院信息与安全学院 2.浙江大学生物系统工程与食品科学学院

分类号：

出版年,卷(期):页码：2022,47(3):142-145

摘要：

传统液压机并式同步控制需要更长时间才能达到稳态误差，不能实现液压机的高精度同步控制。为了提高液压机的工作效率，开发了一种液压机双缸同步控制液压系统，并给出活塞杆伸出和缩回两种状态下的控制方案。将同步误差补偿数据传输至液压缸2，使其更快地完成动态响应，从而显著减小液压缸2的位移差，实现同步控制精度的显著提升。通过误差反馈方式实现同步控制，从而达到对双液压缸同步运行过程的精确控制，通过遗传算法整定PID参数，显著提升了双缸液压系统的同步控制精度。误差反馈同步控制方式与并式控制方式相比，最大误差依低了68.71%；进入稳态误差所需的时间减少了18.52%，因此，可以通过同步控制结构来实现对液压机的精确同步控制。

The traditional synchronous control of hydraulic press needs longer time to reach the steady-state error and can not achieve the high precision synchronous control of hydraulic press. In order to improve the working efficiency of hydraulic press, a synchronous control hydraulic system of hydraulic press with double cylinders was developed, and the control schemes of piston rod in two states for extension and retraction were given. The synchronization error compensation data was transmitted to hydraulic cylinder 2 to complete the dynamic response faster, so as to significantly reduce the displacement difference of hydraulic cylinder 2 and achieve a significant improvement in the synchronization control accuracy. Furthermore, the synchronous control was realized by the error feedback method to achieve the precise control of the synchronous operation process of double hydraulic cylinders, and the PID parameters were adjusted by the genetic algorithm to significantly improve the synchronous control precision of double-cylinder hydraulic system. Compared with the parallel control methods, the error feedback synchronous control method reduced the maximum error by 68.71% and reduced the time required to enter the steady state error by 18.52%. Thus, the precise synchronous control of the hydraulic press could be realized by the synchronous control structure.

基金项目：

国家自然科学基金资助项目（31972609，31772644）

陈杰（1978-），男，硕士，副教授 E-mail：ycchenjie2020@163.com

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