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Sensors 2015, 15(10), 25592-25606; doi:10.3390/s151025592

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

1
Laboratory of Science and Technology on Integrated Logistics Support, College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
2
State key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
3
College of Basic Education, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 13 August 2015 / Revised: 25 September 2015 / Accepted: 5 October 2015 / Published: 8 October 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [730 KB, uploaded 8 October 2015]   |  

Abstract

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. View Full-Text
Keywords: diagnostic strategy; sequential fault diagnosis; AND/OR graph; multimode system diagnostic strategy; sequential fault diagnosis; AND/OR graph; multimode system
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, S.; Song, L.; Zhang, W.; Hu, Z.; Yang, Y. Optimal Sequential Diagnostic Strategy Generation Considering Test Placement Cost for Multimode Systems. Sensors 2015, 15, 25592-25606.

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