摘要
针对振动环境下激光惯组减振系统的线位移和角位移耦合问题,提出了一种减振器关于其惯性主轴的八点对称布局的减振方案。基于多体动力学理论,建立了激光陀螺捷联惯组减振系统的动力学模型,进行了其减振系统的动力学特性仿真研究。结果表明,该方案可以消除激光惯组减振系统的线位移和角位移耦合关系,满足激光惯组的减振要求,从而获得比较理想的减振效果;其主要结构的固有频率均避开了陀螺敏感的频率段,满足高动态条件下惯性器件安装结构的刚度要求。
A vibration reduction scheme that eight dampers were symmetrically laid along its inertia axes was proposed to solve the linear displacement and angular displacement coupling problem of laser gyro strapdown IMU in the vibration environment. Based on multi body dynamics theory, a dynamic model of LIMU vibration reduction system was established. Finally dynamical characteristics were simulated and analyzed. The results show that the scheme can eliminate the coupling relationship between its linear displacement and its angular displacement and meet the vibration reduction requirement to obtain the ideal damping effect. The natural frequencies of its structures avoid the laser gyro frequency band to meet its stiffness requirement in high dynamic condition.
出处
《光学与光电技术》
2011年第5期70-74,共5页
Optics & Optoelectronic Technology
关键词
激光惯组
减振系统
动力学模型
角位移
LIMU
vibration reduction system
dynamic model
angle displacement
