1. Fault-Tolerant Control for an Internet-Based Three-Tank System: Accommodation to Sensor Bias Faults.
- Author
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He, Xiao, Wang, Zidong, Liu, Yang, Qin, Liguo, and Zhou, Donghua
- Subjects
FAULT-tolerant computing ,FAULT-tolerant control systems ,TANKS ,FAULT indicators (Electricity) ,RESIDUAL stresses measurement ,MATHEMATICAL models - Abstract
This paper focuses on the fault-tolerant control problem for an Internet-based three-tank system in the presence of possible sensor bias faults. The Internet-based three-tank system is an experimental setup that can be regarded as a typical networked system for evaluating networked fault-diagnosis and fault-tolerant control methods. Packet dropout phenomenon in the sensor-to-controller link is considered in this paper, and the fault type we deal with is chosen as the sensor bias fault. Fault-diagnosis unit is designed toward an auxiliary system. Sensor bias faults can be detected by comparing the residual signal generated by the fault detection filter and a prescribed threshold. After that, the fault can be isolated by using the residual analysis approach. Once the fault is isolated, it can be estimated iteratively in the least-squares sense. A fault accommodation method is proposed, and a fault-tolerant control strategy is achieved based on the fault information provided by the fault-diagnosis unit. The approach brought forward in this paper is demonstrated via an experimental study on the practical Internet-based three-tank system. Results show the effectiveness and the applicability of the proposed techniques. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
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