基于预测控制的采煤机滚筒自动调高系统

摘要

为了快速跟随工作面顶板的起伏变化,提高采煤机截割滚筒调高系统的响应速度,防止截割顶板而造成部件的损坏,利用预测控制的理论和方法,建立了基于预测控制的采煤机截割滚筒自动调高控制系统,该系统通过历史数据对煤岩界面进行预测,实时调节调高油缸的位移,使采煤机的截割滚筒跟随煤岩界面.利用MATLAB/simulink构建了该系统的仿真模型,仿真试验表明:该系统对截割滚筒高度具有超前预见性,较常规传统控制系统的调节时间缩短0.25s,超调量减小4.8％,反应灵敏、波动小、工作平稳.预测算法中采样点的增多,对滚筒高度的波动和超调量有减小作用,但是调节时间增大.%In order to follow fast roof fluctuating of a face, improve response speed of an adjusting height system of a shearer cutting drum and prevent cutting roof which cause the damage of parts, an automatic adjustment height system of a shearer drum based on predictive control is established with the theory and method of predictive control. In the system, the coal-rock interface is predicted by means of historical data, a displacement of adjustment height cylinder is adjusted in real-time, to make the shearer cutting drum following the coal-rock interface. A simulation model of control system is constructed by the SIMULINK of MATLAB. Simulation results show that height of the shearer cutting drum can be anticipated in the system, the adjustment time is decreased by 0.25 s and overshoot is decreased by 4.8% than a conventional system. The system has sensitive response, small fluctuations and steady working .The increased of sampling point in predictive algorithm have decreased role to fluctuation and overshoot of height of the shearer cutting drum, but adjustment time increased.