Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (9): 107-112.doi: 10.3969/j.issn.1000-565X.2013.09.018

• Mechanical Engineering • Previous Articles     Next Articles

Modeling and Dynamic Performance Evaluation of WTIM Based on Petri Nets

Wu Guo- guang Liu Gui- xiong Zhou Song- bin   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-02-05 Revised:2013-03-26 Online:2013-09-25 Published:2013-08-01
  • Contact: 刘桂雄(1968-)，男，教授，博士生导师，主要从事智能传感、网络化测控、无损检测研究． E-mail:megxliu@scut.edu.cn
  • About author:吴国光(1983-)，男，博士生，主要从事智能传感、网络化测控研究．E-mail:imguangzi@163．com
  • Supported by:

    粤港关键领域重点突破项目(2012A090200005);广东省高等学校高层次人才项目(粤教师函［ 2010］ 79 号文)

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Abstract:

In order to improve the working efficiency of smart wireless sensor nodes and to solve the conflicts between the limited computation ability,the resources and the system performance,first,a dataflow model of the wireless transducer interface module (WTIM) is constructed based on Petri nets,and an isomorphic Markov chain model is constructed according to the reachable state of the proposed model.Next,a two- dimension state transition graph and a stable state probability distribution are obtained.Then,the effects of the WTIM structure parameters on the data loss rate of the proposed model are discussed,and an optimized configuration method of the WTIM structure parameters is devised.Finally,the proposed model is applied to a wireless video system.It is found that the data loss rate after modeling is 49.8% lower than that before modeling.Thus,the proposed model proves to be efficient.

Key words: wireless transducer interface module, dataflow, Petri nets, Markov chains

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