L1Simplex: Fault-tolerant control of cyber-physical systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As the complexity of Cyber-Physical Systems (CPS) increases, it becomes more and more challenging to ensure the reliability of CPS, especially in the presence of system failures. Simplex architecture is shown to be an efficient tool to address the software failure in such systems. However, when physical failures also appear, Simplex does not work any more because the physical dynamics change due to physical failures. The Simplex architecture designed for the original physical model may not be suitable for the new dynamics. To address both software and physical failures, this paper presents the L1Simplex architecture, which contains the safety monitor, the high-performance controller (HPC), the L1- based high-assurance controller (HAC), and the decision logic for controller switching. The safety monitor is used to monitor the system behavior. It leads to another controller switching rule besides the stability-envelope-based rule in the decision logic. The HAC is designed based on the L1 adaptive controller, with which the stability envelope is computed. We show that the L1Simplex architecture can efficiently handle a class of software and physical failures.

Original languageEnglish (US)
Title of host publication2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013
Pages41-50
Number of pages10
DOIs
StatePublished - Oct 15 2013
Event2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013 - Philadelphia, PA, United States
Duration: Apr 8 2013Apr 11 2013

Publication series

Name2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013

Other

Other2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013
CountryUnited States
CityPhiladelphia, PA
Period4/8/134/11/13

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Keywords

  • Fault
  • L1 Adaptive Control
  • Simplex
  • Tolerance

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture

Cite this

Wang, X., Hovakimyan, N., & Sha, L. R. (2013). L1Simplex: Fault-tolerant control of cyber-physical systems. In 2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013 (pp. 41-50). [6603998] (2013 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2013). https://doi.org/10.1109/ICCPS.2013.6603998