Research on Sliding Mode Control Technology in Chain Tension of Scraper Conveyor of Coal Mine

Abstract

Because that the scraper conveyor chain tension control has characteristics of randomness, nonlinear and time-variation in the coal mine, the paper put forward using sliding mode control technology to make tension control system have better dynamic performances.This method utilizes combined reaching law that combining exponential reaching law and variable rate reaching law to design switching function, then calculates the law of sliding mode control for chain tension control system, in order to constantly make tension move along the prescriptive state trajectory.The results of simulation show that, chain tension control with sliding mode control method has better dynamic characteristics of smaller overshoot, no oscillation and stronger robustness.