中文摘要：

为了减小振动对飞行器上仪器的影响,设计了一种橡胶和压电堆相结合的主被动一体化隔振器,提出了一种基于遗传算法并考虑系统稳定性的反馈参数优化方法,并对该系统的隔振效果进行实验验证。建立了该隔振器结构的动力学模型,通过实验对橡胶和压电堆进行参数识别。以系统的振动传递率为目标函数,考虑控制系统的稳定性,以稳定条件作为约束条件,应用遗传算法得到最优化的速度反馈控制参数。搭建实验平台并采用最优化的控制方法进行隔振控制实验。实验结果表明,主被动一体化隔振系统比单纯的被动隔振系统隔振效果好,而且在共振点附近减振效果最好。

英文摘要：

In order to attenuate the impact of vibration on aircraft instrument,an active-passive hybrid vibration isolator by combining rubber and piezostack was proposed. An optimal control based on genetic algorithm was advised,and the performance of the system was verified by experiment. The model and equation of the system were derived,and then the parameters of rubber and piezostack were experimentally identified respectively. The vibration transmissibility was taken as an objective function and the genetic algorithm was applied to optimize the parameters of velocity feedback. The stability of the control system was discussed. Subsequently,an experimental platform was established and the isolation performance by using optimal control was evaluated by experiment. The experimental results verify that the performance of the isolation system presented is better than the pure passive isolator,especially at resonant frequency.