DocumentCode :
185137
Title :
Data-driven actuator fault identification and accommodation in networked control of spatially-distributed systems
Author :
Zhiyuan Yao ; El-Farra, Nael H.
Author_Institution :
Dept. of Chem. Eng. & Mater. Sci., Univ. of California, Davis, Davis, CA, USA
fYear :
2014
fDate :
4-6 June 2014
Firstpage :
1021
Lastpage :
1026
Abstract :
This work presents a methodology for the integrated identification and accommodation of control actuator faults in spatially distributed systems controlled over a resource-limited communication network. A finite-dimensional model-based networked controller that enforces closed-loop stability using minimal sensor-controller communication is initially designed, and an explicit characterization of the networked closed-loop stability region is obtained. Fault identification is carried out using a moving-horizon least-squares parameter estimation scheme embedded in the sensors to estimate on-line the size of the fault using the sampled state and input data. Once the fault is identified and its magnitude estimated and communicated to the controller, a number of possible stability-preserving fault accommodation strategies are devised, including updating the post-fault control model, adjusting the controller design parameters, or a combination of both. The selection of the appropriate accommodation strategy is made on the basis of the estimated fault magnitude and the characterization of the networked closed-loop stability region. Finally, the proposed methodology is illustrated using a representative diffusion-reaction process example.
Keywords :
actuators; closed loop systems; control system synthesis; estimation theory; fault diagnosis; least squares approximations; multidimensional systems; networked control systems; parameter estimation; stability; control actuator fault; controller design parameter; data-driven actuator fault identification and accommodation; diffusion-reaction process; estimated fault magnitude; finite-dimensional model-based networked controller; integrated identification; magnitude estimation; minimal sensor-controller communication; moving-horizon least-squares parameter estimation scheme; networked closed-loop stability region; post-fault control model; resource-limited communication network; spatially distributed systems; spatially-distributed systems; stability-preserving fault accommodation strategy; Actuators; Analytical models; Eigenvalues and eigenfunctions; Process control; Stability analysis; Switches; Distributed parameter systems; Fault detection/accommodation; Networked control systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference (ACC), 2014
Conference_Location :
Portland, OR
ISSN :
0743-1619
Print_ISBN :
978-1-4799-3272-6
Type :
conf
DOI :
10.1109/ACC.2014.6859483
Filename :
6859483
Link To Document :
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