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Signal difference-based deadband H control approach for networked control systems with limited resources

Yingying Liu1,*, Weiwei Che2 and Yunkai Chu3   

  1. 1. School of Information Engineering, Shenyang University, Shenyang 110044, China;
    2. Key Laboratory of Manufacturing Industrial Integrated Automation, Shenyang University, Shenyang 110044, China;
    3. Shenyang Institute of Automation Chinese Academy of Sciences, Shenyang 110016, China
  • Online:2015-06-25 Published:2010-01-03


This paper investigates a signal difference-based deadband H  control approach for networked control systems (NCSs) with limited resources. The effects of variable network-induced delays, sampling intervals and data transmitting deadbands are considered simultaneously and the model of the NCS is presented. A Lyapunov functional is adopted, which makes full use of the network characteristic information including the bounds of network delay (BND), the bounds of sampling interval (BSI) and the bounds of transmission deadband (BTD). In the meanwhile, the new H  performance analysis and controller design conditions for the NCSs are proposed, which describe the relationship of BND, BSI, BTD and the system’s performance. Three examples are used to illustrate the advantages of the proposed methods. The results have shown that the proposed method not only effectively reduces the data traffic, but also guarantees the system asymptotically stable and achieves the prescribed H∞ disturbance attenuation level.