基于体压分布的汽车座椅振动舒适性评价

doi:10.19562/j.chinasae.qcgc.2022.12.015

Abstract

Abstract:

For using the body pressure distribution on the human-seat contact surface to characterize the vibration comfort of vehicle seat， the subjective and objective test of seat vibration comfort are conducted with 12 test participants under low-frequency vertical excitation with six different magnitudes to find the body pressure distribution indicator. The test results of vibration acceleration and body pressure distribution are analyzed to extract the objective evaluation indicators， including the root-mean-square （RMS） of weighted acceleration， the means of average pressure and maximum pressure， and the RMSs of average pressure changing rate and normal force changing rate. A correlation analysis is carried out on subjective and objective indicators by applying non-parametric statistics method. The results show that the means of average pressure and maximum pressure have rather weak correlation with subjective discomfort score （β=0.26， 0.10 respectively）， while the RMSs of average pressure changing rate and normal force changing rate have strong correlation with subjective discomfort score （β=0.83， 0.85 respectively）. Finally， the relationship between the objective parameters and subjective discomfort rating is analyzed by using Stevens’ power law. The results indicate that compare with the RMS indicator of weighted acceleration， the RMSs of both average pressure changing rate and normal force changing rate are highly correlated （R² >99.0%） with subjective discomfort score， hence can be taken as body pressure distribution indicators to characterize vibration comfort.

Key words: vehicle seat, vibration comfort, subjective evaluation, objective test, body pressure distribution

Kaizhan Gao,Qiao Luo,Zhifei Zhang,Zhongming Xu. Vibration Comfort Evaluation of Vehicle Seat Based on Body Pressure Distribution[J].Automotive Engineering, 2022, 44(12): 1936-1943.

Figures/Tables 16

项目	不舒适性评分	a_v	$P ? a$	$P ? p$	$P ? c r m s$	$F ? c r m s$
不舒适性评分	1.00	0.82^**	0.26^*	0.10	0.83^**	0.85^**
a_v		1.00	0.22	0.37^**	0.90^**	0.93^**
$P ? a$			1.00	0.38^**	0.29^*	0.32^**
$P ? p$				1.00	0.12	0.19
$P ? c r m s$					1.00	0.94^**
$F ? c r m s$						1.00

参数	n	lg k	R² /%
a_v & $ψ$	0.89	0.50	97.85
$P ? c r m s ?$ & $ψ$	1.21	0.80	99.46
$F ? c r m s ?$ & $ψ$	0.96	-1.37	99.65

References 32

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不舒适性评价量表
姓名：			日期：
不舒适感	没有不舒适	有点不舒适	不舒适	相当不舒适	严重不舒适
不舒适评分	1	2	3	4	5
	□	□	□	□	□

Vibration Comfort Evaluation of Vehicle Seat Based on Body Pressure Distribution

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