减振装置对惯性导航系统的性能影响分析及测试

Vibration damper of the performance impact analysis and test for the inertial navigation system

惯性器件误差是影响惯性导航系统精度的主要因素。载体的振动会引起惯性器件性能的下降,甚至会破坏其物理结构,导致惯性导航系统的失效。针对于此,通常采用减振装置对惯性器件与载体进行隔离。由于减振装置改变了惯性器件的运动形式,因此需要对安装减振装置后的惯性器件误差进行标定,通过标定结果分析其对导航精度的影响。依据弹载惯性姿态跟踪系统,分析了增加减振装置后的惯性器件误差模型,并通过试验对比了增加减振装置前后惯性器件误差系数。同时,基于弹载姿态解算算法,通过仿真分析了减振装置对导航系统精度的影响。最后对仿真结果进行了分析与总结。

Inertial device error is the main factor that affects the accuracy of inertial navigation system. The vibration of the carrier can make the performance of inertial device worse and even destroy its physical structure, leading to the failure of the inertial navigation system. For this purpose, the vibration isolation device is usually used to isolate the inertial device and the carrier. Because the vibration damping device changes the motion form of the inertial device, it is necessary to calibrate the inertial device error after installing the damping device and analyze its influence on the navigation precision. In this paper, for the inertial attitude tracking system, the inertial device error model is analyzed and the error coefficient of inertia device compared by experiment. At the same time, the influence of the vibration damping device on the precision of the navigation system is analyzed by simulation. The corresponding conclusion of this paper has some guiding significance for the design of the vibration damping device of inertial device.