基于DMC-PID双环控制的提升机恒减速制动系统研究

Research on constant deceleration braking system of hoist based on DMC-PID double-loop control

因矿山提升变载荷、高速重载、控制对象不确定的特点,传统的PID控制算法难以满足提升机恒减速制动系统对高实时性的要求。提出了一种结合DMC与PID双环控制制动过程减速度的方法;建立了恒减速制动过程模型,并进行参数辨识;根据恒减速制动过程的特点设计了DMC-PID双环控制算法。通过仿真平台整定控制器参数,并与传统PID控制下的制动效果进行对比,结果表明:双环控制算法更加可靠,有效提高了液压制动系统的安全性能。

In view of the characteristics of variable load, high-speed heavy load and uncertain control objects during hoisting in mines, the traditional PID control algorithm is difficult for the constant deceleration braking system to meet the high real-time requirements. In the paper, a method of controlling the deceleration of braking process was proposed combining DMC and PID double-loop. Firstly, the model of the constant deceleration braking process was established, and the parameters were identified. Secondly, a DMC-PID double-loop control algorithm was designed according to the characteristics of the constant deceleration braking process. Finally,the parameters of the controller were adjusted on simulation platform, and the braking effects were compared with those of traditional PID control algorithm. The results showed the double-loop control algorithm was more reliable, and effectively improved the safety performance of the hydraulic braking system.