【摘要】 以压电堆为作动器并安置于某机载精密仪器结构中,建立了结构主动隔振系统的动力学模型;针对该模型,建立了基于线性二次型Guass(LQG)最优控制理论的控制方法,对结构振动隔离的理论方法进行了研究并基于Simulink进行了数值仿真分析.仿真结果显示,所研制的隔振系统能够很好地隔离源自基座的位移激励,证明了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了基础.更多还原

【Abstract】 Piezoelectric stack actuators are placed in the structure of a specific precise instrument in spacecraft and the corresponding dynamic model of structural active vibration isolation system is established.The control method based on the linear quadratic Guass optimal control theory is also established;The study of vibration isolation principle and numerical simulation analysis with Simulink tool box of Matlab are also carried out in this paper.The simulation results reveal that the vibration transferred from the bases is well isolated with the control method studied here,and prove the validity and feasibility of the isolation method studied in this paper and thus have settled a foundation for the experimental research in the future.更多还原