离心-振动试验系统振动位移跟踪的高阶滑模控制

Centrifuge Force-Vibration Test System Vibration Control Based on Higher-order Sliding Mode

针对离心-振动试验系统的振动位移跟踪控制存在参数不确定性和干扰的问题,提出了一种基于高阶滑模的振动位移跟踪控制方法;首先介绍了高阶滑模控制基本原理,并建立了离心-振动复合试验系统数学模型,然后引入虚拟控制项,利用李雅普诺夫第二法推导出高阶滑模振动位移控制律;仿真结果表明该方法能够有效降低系统抖振,使得控制作用平滑连续,并实现振动位移跟踪的精确定位,具有较高的控制精度和可靠性。

With the high--order sliding mode control theory, a sliding mode vibration control method is presented for a centrifuge force-- vibration test System in presence of parameter variations and external disturbances. First the basic idea of the higher--order sliding mode control is introduced, then by utilizing virtual item for increasing the relative order of system, the centrifuge force--vibration test system mathematical model is described and the higher--order sliding mode Vibration displacement control law is derived based on Lyapunov second method. The simulation results show that the method effectively eliminate system chattering and achieve vibration tracking maneuver preci- sion positioning, and have higher orecision and reliability.