Diagnosability-Based Sensor Placement through Structural Model Decomposition



Published Jul 8, 2014
Matthew Daigle Indranil Roychoudhury Anibal Bregon


Systems health management, and in particular fault diagnosis, is important for ensuring safe, correct, and efficient operation of complex engineering systems. The performance of an online health monitoring system depends critically on the available sensors of the system. However, the set of selected sensors is subject to many constraints, such as cost and weight, and hence, these sensors must be selected judiciously. This paper presents an offline design-time sensor placement approach for complex systems. Our diagnosis method is built upon the analysis of model-based residuals, which are computed using structural model decomposition. Sensor placement in this framework manifests as a residual selection problem, and we aim to find the set of residuals that achieves single-fault diagnosability of the system, uses the minimum number of sensors, and corresponds to the best model decomposition for the best distribution of the diagnosis system. We present a set of algorithms for solving this problem and compare their performance in terms of computational complexity and optimality of solutions. We demonstrate the approach using a benchmark multi-tank system.

How to Cite

Daigle, M., Roychoudhury, I., & Bregon, A. (2014). Diagnosability-Based Sensor Placement through Structural Model Decomposition. PHM Society European Conference, 2(1). https://doi.org/10.36001/phme.2014.v2i1.1545
Abstract 3164 | PDF Downloads 105



structural model decomposition, sensor placement

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