复杂闭环系统定量/定性相结合的故障可诊断性分析方法研究

项目名称： 复杂闭环系统定量/定性相结合的故障可诊断性分析方法研究

项目编号： No.61203093

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 自动化学科

项目作者： 刘成瑞

作者单位： 北京控制工程研究所

项目金额： 26万元

中文摘要： 提升在轨故障诊断与处理能力是克服航天器控制系统固有可靠性不足、提高运行质量和延长工作寿命的重要手段。目前可诊断性理论方面的研究工作尚处在萌芽阶段，现有研究一般都对工程问题进行了大量简化，不能从本质上描述航天器控制系统光机电混合的复杂特性，更未考虑故障在闭环系统传播的时效性，从而导致现有成果不能完全满足航天工程的应用需求。为此，本项目在深入分析复杂闭环系统可诊断性特性的基础上，针对航天器控制系统中定量模型和定性模型广泛存在情况，基于定性趋势分析和模糊逻辑对信号流图进行扩展，并在信号流中考虑故障传播的时延特性，提出了定量/定性相结合的可诊断性建模方法，建立了相应的复杂闭环系统故障可诊断性判别方法，为航天器控制系统的可诊断性分析与设计提供了理论依据，对提高航天器在轨运行寿命和可靠性具有重要意义。

中文关键词： 航天器控制系统；可诊断性；混合模型；解析冗余关系；可重构性

英文摘要： In order to improve the reliability and prolong the life of spacecraft control system, the diagnosis and treatment capability should been improved to ensure that the faults can be promptly detected and accurately located and the measures can be taken effectively to minimize the impact after a failure occurs. It has been an effective means to make up the deficiencies of inherent reliability from the system level. Therefore, the theory of diagnosability is developed in recent years. However, current research work about diagnosability is still in its infancy. Because the engineering problems about diagnosability is simplified largely in the existing research, it can not accurately describe the complex features of the spacecraft's control system in essentially. Further more, the delay characteristics of the fault propagation in closed-loop system is ignored usually. These reasons lead to the existing achievement can not fully meet the application requirements of the aerospace engineering. In order to solve the above problems, the deeply analysis of the diagnosability characteristic about the complex closed-loop system will be presented firstly in the project. And then, the hybrid quantitative and qualitative diagnosability model will be studied through extending the signal flow graph to fit for the quantitative sign

英文关键词： Spacecraft control system；diagnosability；hybrid model；analytical redundant relations；reconfigurability