摘要
为降低降架时超前支护装备对顶板稳定性的影响,提高支护效果,在分析支护结构和力学分析的基础上,建立超前支护装备升降架过程的力学模型;根据超前支护降架过程的力学要求,即保证支撑力缓慢减小的同时,对多液压缸进行同步控制,由此提出了降架过程位移-压力的双闭环控制方法,借助Simulink和力学模型对控制系统进行建模并仿真.最后,将研究内容应用到超前支护装备的实验样机中,实验结果表明:降架过程的最大同步误差10 mm,可控最高精度达到5 mm.
In order to reduce the effect of advanced supporting equipment on the roof stability when frame is in process of descending, and increase the supporting effect of support, this paper established the mechanical model of the lift frame of the advanced supporting equipment based on the analysis of the structure and mechanics analysis. According to the mechanical requirements of advanced supporting equipment frame descending process, while ensuring that the supporting force decreases slowly, synchronous control is applied to mull^-hydraulic cylinder at same lime. Thus, this paper put forward the frame of displacement pressure drop of double closed loop control method. Based on Siumlink and the mechanics model, this paper established the control system model and carried out simulation on it. Finally, the research content was applied to the experimental prototype of the advanced supporting equipment. The experiment results show that the maximum synchronization error of the process of the down flame is lOmm, and the maximum precision of the control is 5 mm.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2017年第7期745-749,共5页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金(51304107)
辽宁省煤矿液压技术与装备工程研究中心开放基金(CMHT-201206)
关键词
超前支护
临时支护
降架过程
同步控制
双闭环
advanced support
temporary support
frame down
simultaneous control
double closed-loop
