激光陀螺捷联惯导减振系统动力学建模与仿真

Dynamical model and simulation of laser gyro strapdown inertial navigation system

由于激光陀螺固有机抖频率的存在,以及导弹运输、装卸、发射与飞行过程经历的动态环境中振动、冲击、过载等激励,导致激光陀螺在导弹上使用输出精度差。应用多体系统传递矩阵法,建立了激光陀螺捷联惯性测量组合减振多体系统动力学模型,分析激光陀螺固有抖动和导弹振动冲击对激光陀螺输出精度的影响。通过对减振系统动力学模型进行仿真,获得了激光陀螺抖动和导弹冲击环境下激光陀螺捷联惯性测量组合减振系统动态响应。该仿真结果为激光陀螺捷联惯性测量组合减振设计提供理论依据,该分析方法为激光陀螺捷联惯组在导弹上应用提供理论基础。

The accuracy of the laser gyro used in missile is low due to dithering at high frequency and actuating by vibration, shock and overload in dynamical environment. The transfer matrix method of multibody system was used to establish the dynamic model of laser gym strapdown inertial measure assembly and analyze the accuracy effect by dithering of laser gym and shocking of missile. The dynamical response of laser gym strapdown inertial measure assembly was gotten by simulating the multibody system models when the shock of missile and the dither of laser gym acted on the system. The simulation result provided a theory means for designing the vibration isolation of laser gym strapdown inertial measure assembly, and the method provided a theory base for applying the laser gym strapdown inertial measure assembly in missile.