China Mechanical Engineering ›› 2010, Vol. 21 ›› Issue (8): 946-951.

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Method of Petri Nets Using T_invariants for Decision-making of Process Sequence Under Process Constraint

Xiao Weiyue;Luo Youxin;Liao Degang

  1. Hunan University of Arts and Sciences,Changde,Hunan,415000
  • Online:2010-04-25 Published:2010-05-05



  1. 湖南文理学院,常德,415000
  • 基金资助:


The decision-making of process sequence in CAPP is the key problems that have not been solved properly until now.A new decision method of process sequence was proposed based to Petri nets using T_invariant.First of all,a Petri net process sequence model based on rule was built according to the principle of Petri net and the production rule.Then,a alternative process plans T-invariant creating algorithm was given considering process constraints.Finally,a case was studied to verify the reason and validity of the algorithm.The results show that the decision-making of process sequence with the proposed method herein can obtain the best/hypo-best process plans in alternative process plans.

Key words: Petri net, T_invariant, process constraint, process sequence, decision method, CAPP




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