【摘要】 为了降低振动载荷对结构的影响,以叠层式压电作动器作为主动隔振元件,以黏弹性材料作为主体设计被动隔振元件,提出了一种新型混合隔振器。以模拟刚体卫星为研究对象,建立了整星混合隔振系统的动力学模型,对混合隔振器的隔振原理进行了理论分析和数值仿真,在此基础上,利用单输入多输出PID控制方法设计主动控制器,对模拟刚体卫星混合隔振系统进行了试验研究。仿真和试验结果表明,与单纯被动隔振器相比,混合隔振器能够有效降低传递到结构上的振动载荷,特别是在结构固有频率附近隔振效果更加明显,从而显著提高了结构的安全性和可靠性。更多还原

【Abstract】 A new hybrid vibration isolator( HVI) with an laminated piezoelectric actuator used as an active vibration isolation component and viscoelastic material used to design a passive vibration isolation component was proposed to reduce the effects of vibration loads on structures. Taking a simulated rigid satellite as a study object,the dynamic model of the whole-spacecraft hybrid vibration isolation system was established to analyze the vibration isolation principle of a HVI numerically. Then,the single-input multiple-output PID control method was used to design an active controller,tests were performed for the simulated rigid satellite hybrid vibration isolation system. The simulation and test results showed that a HVI can effectively reduce the vibration loads transmitted to structures compared with a pure passive vibration isolator,especially,near natural frequencies of structures,so the safety and reliability of structures can be improved significantly.更多还原