Design and simulation of a two-stage semi-active magneto-rheological anti-impact seat suspension system

doi:10.3969/j.issn.1674-8484.2022.02.003

Abstract

Abstract:

A conceptual design was proposed for a seat with two-stage semi-active impact-resistant soft-landing control by using a four-degree-of-freedom lumped-parameter human body model established by authors to protect the occupants in special vehicles under explosion impacts. The validity of the model was verified through vertical impact dynamics simulation; A damper mechanical model was established based on a magnetorheological damper Hysteretic model; The correlation coefficients of the damper mechanical model were identified on a vibration test bench. The shock resistances and the vibration damping performances of the seat were investigate by a simulation model of the two-stage semi-active seat suspension system. The results show that compared with the original design, the seat designed by authors reduces the occupant’s head peak acceleration by 42.5%, with reducing the maximum effective amplitude transfer rate of the seat by 19.4%. Therefore, the seat improves comfort, reduces the occupant head injury risk, and meets the anti-explosion performance requirements.

Key words: vehicle active safety, anti-impact seats, two-stage suspension system, magnetorheological, soft-landing control

CLC Number:

U463.33

QI Chang, XU Bo, YU Jie, YANG Shu. Design and simulation of a two-stage semi-active magneto-rheological anti-impact seat suspension system[J]. Journal of Automotive Safety and Energy, 2022, 13(2): 242-249.

Figures/Tables 13

References 21

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i	器官	m / kg	k / (kN·m^-1)	c / (Nm·s^-1)
1	骨盆	36.00	20.0	330.0
2	内脏	5.50	10.0	200.0
3	上身躯干	15.00	192.0	909.1
4	头部	4.17	134.4	250.0

i	器官	m / kg	k / (kN·m^-1)	c / (Nm·s^-1)
1	骨盆	36.00	20.0	330.0
2	内脏	5.50	10.0	200.0
3	上身躯干	15.00	192.0	909.1
4	头部	4.17	134.4	250.0

j₁	-1.113	α₂	130.0
j₂	3.591	f₀₁	-6.134
j₃	1.021	f₀₂	21.691
p₁	1.341	f₀₃	-147.2
p₂	1.979	δ	0.810 8
p₃	0.746	β	0.090
α₁	1121

j₁	-1.113	α₂	130.0
j₂	3.591	f₀₁	-6.134
j₃	1.021	f₀₂	21.691
p₁	1.341	f₀₃	-147.2
p₂	1.979	δ	0.810 8
p₃	0.746	β	0.090
α₁	1121

悬架类型	SEAT最大值	f / Hz
被动	6.30	3.00
天棚控制	5.12	2.50
PID控制	5.08	2.50