机载平台惯导系统稳定回路故障分析

Fault Analysis of Stable Circuit in Airborne Platform Inertial Navigation System

稳定回路是平台式惯导系统的重要组成部分,其作用是隔离载体的角运动,稳定回路的精度和可靠性直接影响惯导系统的精度和可靠性。根据故障统计和分析,稳定回路故障的主要部位分别为:外环轴承、直流力矩电机、导电环以及稳定回路控制线路。在对稳定回路动态刚度进行推导的基础上,分析了以上四个部位引起稳定回路故障的机理和故障原因,提出了相应的改进措施。这些措施已经逐步应用于惯导系统中。故障统计表明,采取措施后的惯导系统稳定回路故障有了明显降低,所采取的措施有效可行。

The stable circuit is the important component of the platform inertial navigation system, with the function of isolating the angular motion of the airplane. Its precision and reliability affect directly the precision and reliability of the inertial navigation system. According to the fault analysis, the outer ring bearing, DC torque motor, slip ring and control circle are the main parts of stable circuit. On the basis of deducing the dynamic stiffness of the stable circuit, the failure mechanism is analyzed and the relevant solution is presented. These measures have been applied in the inertial navigation systems. The fault analysis shows that,after taking the solution, the fault rate of the stable circuit decreases greatly and these solutions are effective.