标题：A novel ambulance stretcher based on parallel mechanism and its vibration isolation per-formace analysis
作者：Xiang, Gao ;Junchuan, Niu ;Ze, Li
作者机构：[Xiang, Gao ;Junchuan, Niu ;Ze, Li ] School of Mechanical Engineering, Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong Un 更多
会议名称：25th International Congress on Sound and Vibration 2018: Hiroshima Calling, ICSV 2018
会议日期：8 July 2018 through 12 July 2018
来源：25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling
关键词：Ambulance stretcher; Multi-dimensional vibration isolation; Parallel mechanism; Uncertainties
摘要：The recumbent patients on the ambulance stretcher experience multi-dimensional excitations due to road roughness. In order to isolate the multi-dimensional vibrations validly, a novel ambulance stretcher based on 4-PUU parallel mechanism is proposed. Firstly, the kinematic and dynamic equation are deduced by geometric relation and Lagrange equation respectively. Subsequently, the vibration isolation performance is investigated in time and frequency domain. Further, selecting RMS value as the index of vibration isolation performance, the index with geometric parameters uncertainties, mass uncertainty and spring uncertainty is discussed. Simulations results demonstrate the stretcher system can isolate the multi-dimensional excitations in supine patients sensitive frequency range effectively. The RMS values show different characteristics with uncertainties because of altering Jacobin matrix of the stretcher. © 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. All rights reserved.