半主动直接输出反馈变结构控制电流变阻尼器减振研究

SEMI-ACTIVE STATIC OUTPUT FEEDBACK VARIABLE STRUCTURE CONTROL OF ER DAMPER VIBRATION SUPPRESSION SYSTEM

针对多层结构电流变阻尼器减振系统运动状态难以完全实时测量、扰动存在不确定性、系统参数容易出现摄动以及阻尼器连续可调的特点,提出了半主动直接输出反馈变结构控制策略,根据滑模运动方程稳定的Hurwitz判据选择滑模梯度参数,实现控制与扰动完全解耦;饱和非线性环节使阻尼器阻尼力不超调;阻尼力对主结构做负功控制规则保证主结构最佳减振。仿真分析表明,电流变阻尼器减振控制系统效果明显,不仅对扰动具有自适应性,而且对系统参数摄动也具有很强的鲁棒性。

A semi-active static output feedback variable structure control strategy for the vibration attenuation is presented based on the fact that for multi-object electro-rheological damper vibration suppression system, all state variables is hardly to measure real time, there are always uncertainty external disturbance, the perturbation of parameters often appear and the damping performance of damper is controlled continuously. Toimplement the complete external disturbance decoupling control, the sliding surface gradient parameters are chosen according to the reduced order sliding mode motion Hurwitz stability criterion. The limit of electro-rheological damper damping is incorporated into the controller. The optimal vibration attenuation of main object is guaranteed due to the control rule that damping force only dissipates the vibrating energy of main object. The external disturbance self-adaptability of the vibration suppression control system, the system parameter robustness of the control method and the vibration attenuation effectiveness are all demonstrated by numerical simulation results. Simulations results indicate that the performance of the semi-active static output feedback variable structure control strategy is remarkable.