NDLI: Device Collaboration for Stability Assurance in Distributed Cyber-Physical Systems

Content Provider	IEEE Xplore Digital Library
Author	Tao Li Jiannong Cao
Copyright Year	2014
Description	Author affiliation: Dept. of Comput., Hong Kong Polytech. Univ., Kowloon, China (Tao Li; Jiannong Cao)
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.
Starting Page	201
Ending Page	210
File Size	499998
Page Count	10
File Format	PDF
ISBN	9781479955848
ISSN	10609857
DOI	10.1109/SRDS.2014.22
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-06
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delays Stability criteria Actuators Lyapunov methods Process control Thermal stability
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Computer Networks and Communications Software Hardware and Architecture

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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