多点双层主被动一体化隔振器设计与仿真  

Design and Simulation of Multi-point Double-layer Vibration Isolation System with Active and Passive Integration

作　　者：李雨时[1] 周军[1] 钟鸣[2] 陈照波[2] 焦映厚[2] 

机构地区：[1]西北工业大学航天学院,西安720129 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《噪声与振动控制》2013年第1期22-26,共5页Noise and Vibration Control

基　　金：国家自然科学基金项目(基金编号:11172075)

摘　　要：为保证飞行器敏感仪器的精度,提出一种压电堆橡胶组合隔振器。对压电堆作动器和橡胶隔振器进行设计,提出一个多点支撑双层主被动一体化隔振系统,建立隔振系统的动力学模型,应用改进后的线性二次型(LQR)经典最优理论对双层隔振系统进行主动控制算法设计,并基于Simulink对正弦激励和随机激励情况分别进行了数值仿真分析。仿真结果表明,所设计的隔振器能够大幅度隔离源自基础的激励,证明所研究的隔振方法在理论上是有效的和可行的,从而为进一步的实验研究奠定基础。A novel piezoelectric-rubber combined vibration isolator was proposed to meet the vibration isolation needs of precision instruments of space vehicle. Piezoelectric stack actuator and the rubber isolator were designed. A scheme of double-layer vibration isolation system with active-and- passive integration and multi-point supports was proposed. The dynamic model of the vibration isolation system was established. Applying the improved Linear Quadratic Regulator (LQR) optimal control, the active control algorithm of the double-layer vibration isolation system was designed, and the numerical simulation analysis was carried out based on Simulink under sinusoidal and random excitations respectively. The results show that the vibration isolator can effectively isolate the displacement excitation from the basis, and prove that the isolation method is effective and feasible. Thus, this work laid a foundation for further experimental studies of the vibration isolation system.

关 键 词：振动与波 一体化隔振 最优控制 多点控制 压电堆 双层隔振 

分 类 号：TH113.1[机械工程—机械设计及理论]