置信度检验法在新测量船船姿故障诊断中的应用

为解决惯导设备数据异常而状态码未及时更新所导致的设备状态无法判断的问题展开研究。基于新测量船分布式惯导的安装设计,分析了如何通过坐标转换的方式,计算得到冗余的船姿数据。根据冗余船姿数据的特性,采用置信度检验法对各姿态测量设备进行检测,建立了设备可信任度矩阵,并将矩阵元素与对应设备进行标志,可以通过分析矩阵元素有针对性地进行船姿故障诊断,并对检测过程中可能会产生的矩阵特性做了分析说明。最后,在某次任务惯导实测数据的基础上,仿真了横摇数据的漂移,并通过置信度检验法对其进行检验,实验结果验证了方法的正确性。

Application of Confidence Test in Attitude Fault Diagnosis for a New Instrumentation Ship

This paper aims to find a solution to the problem of equipment inability to determine the errors of inertial reference data because the status codes are not updated in time.Redundant attitude datas are calculated through coordinate transformation based on the design of distributed inertial navigation system for the new space instrumentation ship.Based on the characteristics of the redundant ship attitude datas, all types of attitude measurement equipments are tested with the method of confidence test.A confidence matrix is established and matrix elements are tagged in correspondence with the equipment.Analysis of specific matrix elements can enable diagnosis of faults of specific ship attitude.Possible matrix performance characteristics during the process of diagnosis are analyzed and described.Finally,the ship rolling data drift is simulated based on the inertial navigation instrumentation data of a mission.The correctness of the method is validated through the confidence test method.