中文

Journal of Applied Sciences ›› 2009, Vol. 27 ›› Issue (3): 316-320.

• Control and System • Previous Articles     Next Articles

Net Transmission Period of Multi-loop Distributed Control System

  

  1. 1. Engineering Research Center of Safety Critical Measurement and Control, Ministry of Education,
    Hefei 230009, China
    2. School of Computer and Information, Hefei University of Technology, Hefei 230009, China
    3. School of Mechanical and Automobile Engineering, Hefei University of Technology, Hefei 230009, China
  • Received:2008-10-10 Revised:2009-02-20 Online:2009-05-28 Published:2009-05-28

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Abstract:

          Net transmission period (NTP) is an important parameter of safety critical distributed control system(SCDCS). To obtain NTP, a co-design method between desired control performance and network real-time scheduling is presented with a formalization description based on model-building of multi-loop SCDCS. Meanwhile, a performance function for control loop is built, and a method for getting the maximum allowable transmission interval (MATI) under prescribed stability constraint is introduced by using relative error of state and the Lyapunov theory. Simulation validates the NTP design method. The results show that the method guarantees control network schedulability, and makes control loop have desired dynamic performance.

Key words: safety critical ,  distributed control system (DCS) ,   net transmission period ,   maximum allowable transmissioninterval (MATI) ,   prescribed stability

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