对于带有一个积分环节的线性定常能控系统,分析了指数趋近率下滑模变结构控制的抖振过程,给出了抖振幅度、周期和趋近率参数、控制量的变化率之间的定量关系。超薄快速铝铸轧机前箱液位控制系统中,为防止塞棒挂渣,要求塞棒以一定幅度和频率抖振,这正好可以利用滑模变结构控制有抖振的特点,但必须对抖振加以控制。该文为此系统设计了变结构控制器,进行了系统仿真并与PID控制器进行了比较,验证了理论结果,也表明了滑模变结构控制的优越性。 For a linear steady-state controllable system with an integral part, the chattering process of the exponential decay rate sliding mode control is analyzed. The parameters of chattering amplitude, period and approach rate, the rate of change of control amount The quantitative relationship between. In order to prevent the plug from sticking to slag, it is required that the plug should be chattering with a certain amplitude and frequency, which can just use the sliding mode control to control the chattering characteristics. However, Buffeting to be controlled. In this paper, a variable structure controller is designed for this system. The system simulation is carried out and compared with the PID controller to verify the theoretical results. It also shows the superiority of sliding mode control.