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。
Abstract
In order to attenuate vibration on the impact of aircraft instrument, an active and passive hybrid vibration isolator by combining rubber and piezostack is proposed. An optimal control based on genetic algorithm is advised, and then the performance of the system is verified by experiment. After the model and equation of system are derived, the parameters of rubber and piezostack are experimentally identified, respectively. The vibration transmissibility is used as objective function and genetic algorithm is applied to optimize the parameters of velocity feedback. At the same time, the stability of control system is considered. Subsequently, the experimental platform is established and the performance is evaluated by experiment using optimal control. The experimental results verify the isolation performance is better than pure passive isolator, especially at resonant frequency.
关键词
隔振 /
压电堆作动器 /
反馈控制 /
最优化
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Key words
vibration isolation /
piezostack actuator /
feedback control /
optimize
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