Device collaboration for stability assurance in distributed cyber-physical systems

Tao Li, Jiannong Cao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Distributed Cyber-Physical Systems (DCPS) are special control systems because of involving distributed systems characteristics. To enable reliable DCPS, stability assurance is of utmost importance. But due to the system's distributed nature, network delay is inevitable and can affect stability adversely. Existing work to assure stability in DCPS has to rely on either a fixed and accurate model of network delay, or the scheduling of messages in the network. However, in reality, it is difficult to obtain an accurate network delay model to support the former approach, because the network can exhibit very complex behaviors. The latter approach also suffers from a notable problem, that is, message scheduling is often not allowed or supported by the network. In this paper, we propose a novel approach to overcome these drawbacks. We augment DCPS devices, including sensor, actuator and controller, with certain distributed intelligence. Thus, they can collaborate to understand the characteristics of network delay at runtime, and then adapt their behaviors accordingly to achieve stability. In this way, we avoid the reliance on network delay modeling and message scheduling, and also make DCPS adaptive to the dynamic network environment. Furthermore, we conduct theoretical analysis, and derive some stability criteria to guide the distributed collaboration and adaptation. The effectiveness of our approach has been validated in a simulated green building application.
Original languageEnglish
Title of host publicationProceedings - 2014 IEEE 33rd International Symposium on Reliable Distributed Systems, SRDS 2014
PublisherIEEE Computer Society
Pages201-210
Number of pages10
Volume2014-January
ISBN (Electronic)9781479955848
DOIs
Publication statusPublished - 1 Jan 2014
Event33rd IEEE International Symposium on Reliable Distributed Systems, SRDS 2014 - Nara, Japan
Duration: 6 Oct 20149 Oct 2014

Conference

Conference33rd IEEE International Symposium on Reliable Distributed Systems, SRDS 2014
CountryJapan
CityNara
Period6/10/149/10/14

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computer Networks and Communications

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