Custom-contoured Cushion Interface Design Method Based on Interface Pressure Mapping

doi:10.3901/JME.2019.17.162

Abstract

Abstract: The custom-contoured cushion (CCC) whose surface fits the human buttocks can improve the comfort of the cushion. The CCC design method based on body pressure mapping is simplicity and efficiency, however an appropriate mapping function is hard to obtain. Aimed at polyurethane foam cushion, a CCC design method based on body pressure mapping is proposed (simulated pressure and deformation mapping method, SPDM method), whose mapping function is obtained from the simulation results:firstly the finite element model of human buttock-seat cushion is established and is adaptively adjusted according to the human body parameters and material characteristic curve, secondly the body pressure mapping function is obtained by fitting the simulation results of pressure and deformations, then the body pressure distribution is transformed into the carving depth of the foam cushion, finally the interface of CCC is completed in CATIA. SPDM method and tested material characteristic mapping (TMCM) method were used to design cushions based on experiment and simulation pressure data of two different statures experiments(50th and 95th percentile), the smoothness and body pressure distribution of the designed cushion surface are used to validate the custom-contoured cushion. The results indicates that custom-contoured cushion designed based on SPDM method has a good smoothness and can improve the comfort of the cushion.

Key words: custom-contoured cushion, interface design, human buttock-cushion model, body pressure distribution, pressure mapping

CLC Number:

TG156

ZHANG Zhifei, LI Chunyu, LIANG Ling, XU Zhongming, HE Yansong. Custom-contoured Cushion Interface Design Method Based on Interface Pressure Mapping[J]. Journal of Mechanical Engineering, 2019, 55(17): 162-171.

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