惯导系统级间动态对准测试系统设计与应用

Design and Application of Interstage Dynamic Alignment Test System for Inertial Navigation System

摘要:

多级航天装备的惯导系统级间相对安装误差标定精度与补偿效果对其导航精度有着直接影响，实际工程应用时相对安装误差的标定往往是非重复性流程，且缺少快速评估相对安装误差准确性的测试手段；为了提高测试覆盖性，在系统级测试阶段提出一种惯导系统级间动态对准测试的总体方案，设计了一套检测惯导系统级间相对安装误差的自动化设备；测试设备以基于PXI总线的控制系统为核心，配置摇摆转台提供动态激励，搭载基于LabVIEW开发平台的上位机测试软件，配合上传至产品端的测试软件实现测试流程。通过试验测试验证了测试系统的应用价值，进一步分析测试结果发现了惯导系统级间通信时延问题并改进了测试方法，提高了相对安装误差检测的准确性。

Abstract:

The calibration accuracy and compensation effect of interstage installation error of inertial navigation system of multistage space equipment have direct influence on its navigation accuracy. In practical engineering application, the calibration of installation error is often a non-repetitive process, and there is a lack of testing means to quickly evaluate the accuracy of installation error. In order to improve the test coverage, an overall scheme of interstage dynamic alignment test is proposed in the system-level test phase, and a set of automatic equipment for detecting interstage installation error is designed. The test equipment is based on the control system of PXI bus as the core, and the turn table is configured to provide dynamic excitation. The upper computer test software based on LabVIEW development platform is equipped, and the test software uploaded to the product side is used to realize the test process. The application value of the test system is verified through the test. The further analysis of the test results reveals the problem of interstage communication deley of the inertial navigation system and improve the test method to provide the accuracy of installation error detection.