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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.
With the piezoelectric stack as the actuator and placed in an airborne precision instrument structure, a dynamic model of the structure active vibration isolation system is established. Based on the model, a linear quadratic Guass (LQG) optimal control theory , The theoretical method of structural vibration isolation is studied and the numerical simulation based on Simulink is carried out.The simulation results show that the vibration isolation system developed can well isolate the displacement excitation from the base, The vibration isolation method is theoretically effective and feasible, which lays the foundation for further experimental research.