Decentralized diagnosis in a spacecraft attitude determination and control system

12th European Workshop on Advanced Control and Diagnosis

Pérez, C.G.^1,2,4 ; Travé-Massuyès, L.^1,3 ; Chanthery, E.^1,4 ; Sotomayor, J.^2

CNRS, LAAS, 7 avenue du colonel Roche, Toulouse

F-31400, France^1

Pontificia Universidad Católica del Perú, Department of Engineering, Lima

32, Peru^2

Université de Toulouse, LAAS, Toulouse

F-31400, France^3

Université de Toulouse, INSA, Toulouse

F-31400, France^4

关键词: Analytical redundancy relations;    Centralized approaches;    Decentralized architecture;    Decentralized diagnosis;    Fault tolerant control design;    Geographically distributed systems;    Spacecraft attitude determination;    Structurally overdetermined;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/659/1/012054/pdf
DOI  :  10.1088/1742-6596/659/1/012054

来源: IOP

【 摘 要 】

In model-based diagnosis (MBD), structural models can provide useful information for fault diagnosis and fault-tolerant control design. In particular, they are known for supporting the design of analytical redundancy relations (ARRs) which are widely used to generate residuals for diagnosis. On the other hand, systems are increasingly complex whereby it is necessary to develop decentralized architectures to perform the diagnosis task. Decentralized diagnosis is of interest for on-board systems as a way to reduce computational costs or for large geographically distributed systems that require to minimizing data transfer. Decentralized solutions allow proper separation of industrial knowledge, provided that inputs and outputs are clearly defined. This paper builds on the results of [1] and proposes an optimized approach for decentralized fault-focused residual generation. It also introduce the concept of Fault-Driven Minimal Structurally-Overdetermined set (FMSO) ensuring minimal redundancy. The method decreases communication cost involved in decentralization with respect to the algorithm proposed in [1] while still maintaining the same isolation properties as the centralized approach as well as the isolation on request capability.