锻造液压机双缸同步控制系统研究

Research on the Synchronous Control System of Two Cylinders for Forging Hydraulic Press

针对锻造液压机双缸同步系统控制精度不足的问题,提出了一种采用误差反馈的同步控制结构。在建立同步控制系统数学模型基础上,对传统的串联型和并联型同步控制结构进行改进,并利用遗传算法对系统中PID控制器参数进行优化分析。最后将该控制结构仿真结果与串联型、并联型控制结构仿真结果进行对比,研究结果表明:在最大同步误差、达到稳态同步误差的调整时间等方面,采用误差反馈的同步控制结构均优于传统的串联型、并联型控制结构,能够满足锻造液压机同步控制性能要求。

In order to solve the problem of insufficient control accuracy of the double cylinder synchronous system for forging hydraulic press;a synchronous control structure with error feedback is proposed.On the basis of establishing the mathematical model of the synchronous control system;the traditional series type and parallel type synchronous control structures are improved.The PID controller parameters in the system are optimized and studied by using genetic algorithm.Finally;the simulation results of the control structure are compared with those of the series and parallel control structures.The research results show that in terms of the maximum synchronous error and the adjustment time to reach the steady-state synchronous error;the synchronous control structure with error feedback is superior to the traditional series and parallel control structures.The synchronous control structure can meet the synchronous control performance requirements of forging hydraulic press.