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Comparing Switching vs. Mixing MPC for Robust Fault-Tolerant Control

14 pagesPublished: January 6, 2018

Abstract

We conduct a comparative study between two approaches for combining signals from several MPCs designed for different fault scenarios. The first is MPC switching where a switch dictates which of the MPC controllers is currently active. The second is MPC mixing where all MPCs are running concurrently and their outputs are blended in proportion to the current estimate of fault state. We demonstrate results using a gravity drained multi-tank system. Our empirical results show that the mixing approach responds more quickly to faults than the switching approach. Further, we show that the speed and accuracy of fault isolation has a critical impact on fault tolerance.

Keyphrases: fault isolation, fault-tolerant control, FDI

In: Marina Zanella, Ingo Pill and Alessandro Cimatti (editors). 28th International Workshop on Principles of Diagnosis (DX'17), vol 4, pages 110--123

Links:
BibTeX entry
@inproceedings{DX'17:Comparing_Switching_vs._Mixing,
  author    = {Yves Sohege and Gregory Provan},
  title     = {Comparing Switching  vs. Mixing MPC for Robust Fault-Tolerant Control},
  booktitle = {28th International Workshop on Principles of Diagnosis (DX'17)},
  editor    = {Marina Zanella and Ingo Pill and Alessandro Cimatti},
  series    = {Kalpa Publications in Computing},
  volume    = {4},
  pages     = {110--123},
  year      = {2018},
  publisher = {EasyChair},
  bibsource = {EasyChair, http://www.easychair.org},
  issn      = {2515-1762},
  url       = {https://easychair.org/publications/paper/B8Jz},
  doi       = {10.29007/4rvz}}
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