Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (4): 970-979.doi: 10.12305/j.issn.1001-506X.2021.04.14

• Systems Engineering • Previous Articles     Next Articles

Modeling and index evaluation of multi-level testability of missiles based on GSPN

Yuyao ZHAI*(), Xianjun SHI(), Jiapeng LYU(), Lu HAN()   

  1. Coast Guard Academy, Naval Aeronautical University, Yantai 264001, China
  • Received:2020-03-19 Online:2021-03-25 Published:2021-03-31
  • Contact: Yuyao ZHAI E-mail:412997283@qq.com;sxjaa@sina.com;lvjiapeng001@163.com;953339581@qq.com

Abstract:

Aiming at the problem that the test requirement modeling of missiles is not yet mature and it is difficult to conduct test requirement analysis, a test requirement modeling method based on generalized stochastic Petri net (GSPN) is proposed. Based on the analysis of the missile structure, the testability requirements of the missile are modeled, and a two-stage GSPN model of the missile is given to analyze the fault detection and maintenance process of the missile system. According to the GSPN model, it is isomorphic to the embedded Markov chain. The existing state set and disappearing state set are used to represent the change of the place, and the test index is solved by using the isomorphism method. The multi-level GSPN model is decomposed into multiple subnets from top to bottom, which greatly reduces the number of state spaces. The equivalent transition rule solves the compressed subnet. Finally, a combination of qualitative analysis and quantitative calculation is used to determine the test index requirements of missiles at all levels. Through simulation calculation, the availability error with the system requirements does not exceed 0.7%, which verifies the feasibility of the multi-layer GSPN model and the credibility of the analysis results.

Key words: testability requirements modeling, testability, embedded Markov chain (EMC), isomorphism, testability index, availability

CLC Number: 

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