Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (1): 127-140.doi: 10.16182/j.issn1004731x.joss.19-0262

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Improved Wolf Pack Algorithm for Distribution of Molds on Molds Table

Han Zhonghua1,2, Liu Yuehan1, Li Man3, Sun Liangliang1, Zheng Hongzhi4   

  1. 1. Faculty of Information and Control Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
    2. Department of Digital Factory, Shenyang Institute of Automation, the Chinese Academy of Sciences (CAS), Shenyang 110016, China;
    3. Yatai Group Shenyang Modern Building Industry Co., Ltd., Shenyang 110136, China;
    4. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2019-06-27 Revised:2019-07-30 Published:2021-01-18

Abstract: In order to solve the problem of the distribution of molds on the mold table in the production process of concrete prefabricated components, a method combining Bottom-Left Algorithm (BLA) and Improved Wolf Pack Algorithm (IWPA) is proposed. Improved Wolf Pack Algorithm is for optimizing the order of upper line and the mold used for each member is sequentially assigned to the mold table according to the upper line. BLA is used to determine the direction and position of the molds on the molds table. The WPA safari behavior is improved by introducing Levi's flying ideas and the Hamming distance-based wolf pack dynamic update mechanism is used to improve the Wolf Pack Algorithm. The wolf pack diversity is enriched and the search ability of WPA in the solution space is enhanced. An example test is carried out to verify the effectiveness of the method.

Key words: wolf pack algorithm, concrete prefabricated component, distribution of molds on the mold table, levy flights, hamming distance

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