Optimal Sequential Diagnostic Strategy Generation Considering Test Placement Cost for Multimode Systems

Sensors

Shigang Zhang²  Lijun Song¹  Wei Zhang³  Zheng Hu²  Yongmin Yang² 

[1] College of Basic Education, National University of Defense Technology, Changsha 410073, China; E-Mail:;Laboratory of Science and Technology on Integrated Logistics Support, College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China; E-Mails:;State key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China; E-Mail:

关键词: diagnostic strategy;    sequential fault diagnosis;    AND/OR graph;    multimode system;   

DOI  :  10.3390/s151025592

来源: mdpi

【 摘 要 】

Sequential fault diagnosis is an approach that realizes fault isolation by executing the optimal test step by step. The strategy used, i.e., the sequential diagnostic strategy, has great influence on diagnostic accuracy and cost. Optimal sequential diagnostic strategy generation is an important step in the process of diagnosis system construction, which has been studied extensively in the literature. However, previous algorithms either are designed for single mode systems or do not consider test placement cost. They are not suitable to solve the sequential diagnostic strategy generation problem considering test placement cost for multimode systems. Therefore, this problem is studied in this paper. A formulation is presented. Two algorithms are proposed, one of which is realized by system transformation and the other is newly designed. Extensive simulations are carried out to test the effectiveness of the algorithms. A real-world system is also presented. All the results show that both of them have the ability to solve the diagnostic strategy generation problem, and they have different characteristics.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.