• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (4): 246-257.doi: 10.3901/JME.2020.04.246

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Integrated Scheduling Algorithm of Complex Product with No-wait Constraint Based on Virtual Component

GUO Weifei, LEI Qi, SONG Yuchuan, Lü Xiangfei, LI Lei   

  1. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030
  • Received:2019-02-25 Revised:2019-08-20 Online:2020-02-20 Published:2020-04-23

Abstract: For the complex product scheduling problem with no-wait constraint between operations in the actual production, an integrated scheduling algorithm based on design structure matrix and genetic algorithm is proposed. Based on the concepts of no-wait virtual component, wait virtual component, furcated virtual component and child virtual component, a more effective encoding based on lower triangular design structure matrix of digital virtual component is designed, which not only satisfies the sequence constraints of complex product processing and assembly, but also reflects the no-wait constraint between operations. Feasible crossover and mutation methods are designed and avoid the transformation work of infeasible offspring individuals. A decoding method which can meet the no-wait constraint between operations is also presented, and ensures that chromosomes are decoded into active schedules. Experimental results show that the proposed integrated scheduling algorithm has good solution speed and quality for complex product scheduling problem with no-wait constraint between operations.

Key words: no-wait constraint, virtual component, genetic algorithm, integrated scheduling

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