Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (8): 1089-1097.DOI: 10.12068/j.issn.1005-3026.2023.08.004

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Improved Particle Swarm Optimization Algorithm Based on Multiple Strategies

KANG Yan-song, ZANG Shun-lai   

  1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China.
  • Published:2023-08-15
  • Contact: ZANG Shun-lai
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Abstract: Aiming the problem of slow convergence speed and difficulty in jumping out of the local optimal solution of particle swarm optimization (PSO) algorithm, the standard PSO algorithm is improved with various strategies, and the hybrid dynamic PSO (HDPSO) algorithm is proposed. The algorithm divides particles into dominant particles and inferior particles according to a proportion, and uses different formulas to calculate the inertia weights of each particle respectively. Each particle is assigned a variation coefficient, and the duration of small fitness changes between adjacent particles is recorded. If this duration exceeds a threshold value, the variation coefficient is accumulated and reset to the initial value after reaching the upper limit. The acceleration coefficient is introduced into the position update formula to improve the convergence speed of the algorithm. The standard test functions are used to test the HDPSO algorithm and other PSO algorithms. The results show that HDPSO algorithm has obvious advantages in terms of convergence speed, optimization accuracy and stability, which further proves the effectiveness of the proposed method.

Key words: particle swarm optimization (PSO) algorithm; adaptive inertia weight; mutation; acceleration coefficient; local optimal solution

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