Optimization of child protection system based on improved particle swarm optimization algorithm

doi:10.16265/j.cnki.issn1003-3033.2023.01.0895

Abstract

Abstract:

In order to ensure the safety of children in the car, the improved particle swarm optimization algorithm was used to optimize the child restraint protection system. Firstly, the validity of the simulation model of the child seat trolley test was verified based on the 40% offset crash trolley test, and the child airbag model was established as well. Then, the second order response surface models were established between the significant parameters of the protective system and indexes of head and chest injuries in children, combined with Crossover, mutation and elite reserved strategy of the genetic algorithm. The improved multi-objective particle swarm optimization algorithm was put forward. Meanwhile, the improved algorithm was verified. Finally, the multi-objective fuzzy optimization algorithm was used to obtain the optimal values of the system design parameters. Combined with the trolley simulation experiment model, the effectiveness of the simulation models and algorithm were verified. The results show that the protections of the child's head and chest are taken into account by optimal values of the models, and that convergence speeds of the models are improved by the fusion of the genetic algorithm and particle swarm optimization algorithm.

Key words: child restraint protection system, multi-objective particle swarm optimization, crossover and mutation operations, elite retention strategy, fuzzy optimization decision

WANG Wanqiu, MA Minghui, QIAN Yubin, KONG Rongmin. Optimization of child protection system based on improved particle swarm optimization algorithm[J]. China Safety Science Journal, 2023, 33(1): 122-129.

Figures/Tables 10

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Tab.3

Comparison of algorithm optimization and simulation results

分组	L/mm	$μ$	P/mm	S/ $m m 2$	F	$a H$ /(m·s^-2)	$a T$ /(m·s^-2)
算法优化值	16.326 2	0.276 9	330.000 2	25.035 0	0.800 0	399.322 1	370.574 1
仿真值	16.326 2	0.276 9	330.000 2	25.035 0	0.800 0	412.643 1	392.672 4

Tab.3

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评价指标	试验值	仿真值	误差/%
a_H/(m·s^-2)	599.98	604.23	0.71
a_T/(m·s^-2)	575.21	560.34	2.59

评价指标	未添加安全气囊	添加安全气囊
a_H/(m·s^-2)	604.23	563.27
a_T/(m·s^-2)	560.34	535.88