复杂航天器电气系统潜通路分析技术研究

Research on Potential Path Analysis Technology of Spacecraft Complex Electrical System

摘要:

针对复杂航天器电气系统功能接口复杂、信号类型众多的特点,系统分析了导致潜通路存在的接口冗余、时序逻辑复杂、接地类型多等客观原因;明确了复杂航天器电气系统潜通路分析工作流程,并简要论述了潜通路分析的准备工作中的单机电气接口数据收集、电路原理图设计与简化的方法和要点,结合潜通路仿真建模分析及优化方法,总结了复杂航天器电气系统潜通路故障定位的潜在路径搜索与分析、识别与验证的步骤;提出了复杂航天器电气系统预防潜通路的电气接口信号类型简单化、电气接口隔离、信号流向单一化、接地设计提前规划四项设计原则,并针对某航天器匹配测试阶段发现的潜通路问题的原因及改进措施进行了分析。

Abstract:

For the characteristics of complex spacecraft electrical system, that is complex functional interface and many types of signals, the objective reasons such as redundancy of interface, complexity of temporal logic and multiple grounding types are analyzed systematically. The working procedure of sneak path analysis for complex spacecraft electrical system is defined , the single channel electrical interface data collection, circuit schematic design and simplification methods and key points in the preparation of sneak path analysis are briefly discussed , combined with the simulation analysis and optimization method of sneak path, the potential path search, analysis, identification and verification of potential path fault location of complex spacecraft electrical system are summarized. Four design principles for the prevention of sneak path in complex spacecraft electrical system are presented , that is simplified electrical interface, signal type, isolated electrical interface, single signal flow and planned ground design , the reasons for the hidden path problems in the matching test of the spacecraft and the improvement measures are analyzed.