基于改进滑模变结构的加筋板振动控制研究

Research on Vibration Control of Stiffened Plate Based on Improved Sliding Mode Variable Structure

针对外部持续激励下加筋板振动滑模变结构控制系统进入稳态的时间较长,且存在抖振现象的问题,在传统幂次、指数趋近律的基础上,构建新的自适应因子,形成了一种改进趋近律滑模变结构控制算法,并证明其收敛性。分析3种不同趋近律对系统振动控制的效果,仿真和实验结果表明,改进后的方法取得了比传统滑模变结构算法更优的控制效果,能在一定程度上削弱抖振。

To the problem that the sliding mode variable structure control system of the stiffened plate vibration with external continuous excitation takes a long time to enter the steady state and the chattering phenomenon is relatively obvious,a new adaptive factor is constructed on the basis of the traditional power and exponential approach law forming an improved sliding mode variable structure control algorithm of the approach law,and its convergence is proved.The results of simulation and experiment show that the improved method has better control effect than the traditional algorithm and will weaken chattering to a certain extent.