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论文:2020,Vol:38,Issue(5):971-976 |
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引用本文： |
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崔小丹, 程咏梅, 李振威. 多余度大气/惯性系统高灵敏度故障检测方法[J]. 西北工业大学学报 |
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CUI Xiaodan, CHENG Yongmei, LI Zhenwei. Redundant ADS and INS High Sensitivity Fault Detection Method[J]. Northwestern polytechnical university |
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| 多余度大气/惯性系统高灵敏度故障检测方法 |
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| 崔小丹, 程咏梅, 李振威 |
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| 西北工业大学 自动化学院, 陕西 西安 710072 |
| 摘要: |
| GLT方法的故障检测函数近似与故障大小的平方成正比，当软故障较小时，其故障检测函数值低于检测门限，导致对多余度系统的软故障检测灵敏度低、漏检率高；IM-SPRT方法通过累加较小的软故障值，使故障检测函数值迅速增大到故障检测门限之上，因此，对软故障检测灵敏度高，但不能及时判断故障结束时刻，导致故障检测高虚警。针对上述问题，提出了一种基于GLT/IM-SPRT的多余度系统高灵敏度故障检测方法。该方法利用IM-SPRT方法检测弱小软故障；利用GLT故障检测结果将IM-SPRT方法故障检测函数值置零，且用GLT隔离故障；基于此，设计了多余度大气/惯性系统高灵敏度故障检测与隔离方法框架。三余度大气子系统级、惯性传感器级软、硬故障检测与隔离仿真实验结果表明：新方法能提高故障检测灵敏度、降低漏检率。 |
| 关键词:
多余度大气/惯性系统
GLT方法
IM-SPRT方法
软故障
仿真
故障检测
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| Redundant ADS and INS High Sensitivity Fault Detection Method |
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| CUI Xiaodan, CHENG Yongmei, LI Zhenwei |
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| School of Automation, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| The fault detection function of GLT method is approximately proportional to the square of fault value, the value of the fault detection function is lower than the detection threshold when the soft fault is small, which leads to the low sensitivity of soft fault detection and the high rate of missing detection. The IM-SPRT method rapidly increases the value of fault detection function above the threshold of fault detection by accumulating small soft fault values, so it has high sensitivity for soft fault detection, however, the end time of the fault cannot be judged timely, resulting in a high false alarm for fault detection. In view of the above problems, this paper proposes a high-sensitivity fault detection method for redundant systems based on GLT/IM-SPRT. This method uses the IM-SPRT method to detect weak and soft faults and sets the IM-SPRT method fault detection function value to zero by the GLT fault detection result, and isolates the fault with GLT. On this basis, a framework of high-sensitivity fault detection and isolation methods for redundant ADS and INS systems is designed. The simulation results of soft and hard fault detection and isolation of three-redundancy ADS subsystem level and INS sensor level show that the method in this paper can improve the sensitivity of fault detection and reduce the rate of missed detection. |
| Key words:
redundant ADS and INS
GLT method
IM-SPRT method
soft fault
simulation
fault detection
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| 收稿日期: 2019-12-17
修回日期:
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| DOI: 10.1051/jnwpu/20203850971 |
| 基金项目: 西北工业大学研究生创新创意种子基金（ZZ2019188）与盲信号处理国家重点实验室稳定支持项目（61424131903）资助 |
| 通讯作者:
Email： |
| 作者简介: 崔小丹(1993-),西北工业大学硕士研究生,主要从事导航、制导与控制研究。
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