基于子结构的非线性滞变体系的滑模分散主动控制
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摘要
大型复杂结构在强震作用下会进入弹塑性变形阶段,形成非线性滞变系统。提出将复杂的大型结构分解成若干个子结构,基于子结构模型,考虑系统的不确定性因素,利用滑移模态控制(变结构控制)理论,分析在外界干扰以及系统摄动不可测的情况下的振动控制算法。对集中控制在作动器失效和反馈信息丢失情况下进行分析,并在第3阶段9层Benchmark模型上进行了仿真,分析了其控制效果。为了改进集中控制鲁棒性能较差的缺点,设计了滑模分散主动控制算法,并在模型上进行了仿真分析。比较了集中滑模控制和分散滑模控制的控制效果,得到了一些定性结论。
Complex structure presents inelastic deformation under intense ground shaking,which forms nonlinear hysteresis system.The complex structure is first divided into several substructures,and then control algorithms are analyzed based substructure model when uncertainties factors are concerned and the perturbation and interference are unpredictable by sliding mode control.Control effect of centralized control is analyzed with the actuators failure and feedback information loss.And the simulation is made on the third generation Benchmark nonlinear structure.In order to improve the robust performance,active control of decentralized sliding mode control(DSMC) is designed.The simulation is made and the results show that the control effect is good.
引文
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