基于解析余度的机载维护系统故障诊断方法  

A Method of Real-time Fault Diagnosis for Onboard Maintenance System Based on Analysis Redundancy

作　　者：池程芝[1] 章卫国[1] 高亚奎[1,2] 刘小雄 

机构地区：[1]西北工业大学自动化学院,陕西西安710072 [2]中航第一飞机设计研究院总师办,陕西西安710089

出　　处：《计算机测量与控制》2011年第7期1552-1554,1557,共4页Computer Measurement &Control

摘　　要：为了完善机载维护系统的余度管理、自检测监控等功能,同时综合考虑硬件余度和解析余度的特点,将解析余度的故障诊断技术集成并应用于机载维护系统的余度管理、自检测(BIT)辅助监控等,故障诊断的过程分为预警、校验两个步骤,其中在校验过程中提出一种改进的序贯概率比方法,使得在有预警故障存在的情况下,加速校验过程以满足实时性。以进一步满足机载维护系统故障诊断的实时性和鲁棒性。最后,通过仿真结果及分析表明该技术应用在机载维护系统中具有鲁棒性、实时性。In order to improve redundancy management and built in test（BIT） of onboard maintenance system（OMS）,while considering hard redundancy and analytical redundancy,a method of fault diagnosis based on analytical redundancy is applied to OMS for redundancy management and assisted surveillance of built in test（BIT）.To achieve the performance of real-time and robustness,the process of fault diagnosis is divided into alarm and verification,and a improved sequential probability ratio test（SPRT） is proposed to accelerate the convergence rate of diagnosis when there is an alarm.Results show the robustness and rapidity of the method in OMS.

关 键 词：解析余度 故障诊断 序贯概率比 机载维护 余度管理 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]