Ambulance stretcher based on parallel mechanism and vibration semi-active control

被引：0
|
作者：
Gao X. [1 ,2 ]
Niu J. [1 ,3 ]
Shen G. [1 ]
Tian L. [1 ]
机构：
[1] School of Mechanical Engineering, Shandong University, Jinan
[2] State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun
[3] Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2019年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Ambulance stretcher; Magneto-rheological damper; Parallel mechanism; Semi-active control;
D O I：
10.11817/j.issn.1672-7207.2019.01.009
中图分类号：
学科分类号：
摘要：
The supine patients on ambulance stretcher experienced multi-dimensional excitations from the road. In order to isolate the multi-dimensional vibration effectively, an improved 4-PUU parallel mechanism was proposed as the main structure of the stretcher. Springs and magneto-rheological dampers were installed at the prismatic pairs. Dynamic and state-space equations of the vibration isolation system were deduced. The controllable damping force was obtained by combining LQR with Hrovat semi-active algorithm. The semi-active control and vibration isolation capability were addressed with stochastic road profile excitation. The results show that the stretcher system is able to reduce the translational vibrations along the axes and the rotational vibration around the x-axis validly. The vibration isolation capability of semi-active control stretcher system composed of MR dampers is significantly better than passive control system, and it can achieve almost the same vibration isolation performance as active control system. © 2019, Central South University Press. All right reserved.
引用
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页码：59 / 66
页数：7
相关论文
共 17 条
  • [1] Li J., Xiao Y., Wu K., Simulation and analysis of lying position comfort of ambulance transfer stretcher, Agriculture Equipment & Vehicle Engineering, 54, 9, pp. 19-22, (2016)
  • [2] Xu J., Advances of research on vibration control, Chinese Quarterly of Mechanics, 36, 4, pp. 547-565, (2015)
  • [3] Wang M., Xu X., Ren X., Simulation analysis and optimization design for vibration isolation characteristics of stretchers on ambulance, Journal of Vibration and Shock, 27, 8, pp. 77-80, (2008)
  • [4] Gao P., Sun D., Liang P., Et al., Characteristics analysis of pneumatic artificial muscle isolation systems on ambulance vehicle mounted stretchers, Noise and Vibration Control, 34, 3, pp. 119-123, (2014)
  • [5] Yu D., Fu C., Yang D., Et al., Study on vibration active control of ambulance stretcher and supine patient system, Journal of Qingdao University(Engineering & Technology Edition), 26, 2, pp. 89-93, (2011)
  • [6] Ren X., Duan D., Gao Z., Et al., Application study of air spring for vehicle stretcher vibration isolation system, Medical Equipment, 30, 10, pp. 20-22, (2009)
  • [7] Zhao W., Li B., Liu P., Et al., Semi-active control for a multi-dimensional vibration isolator with parallel mechanism, Journal of Vibration and Control, 19, 6, pp. 879-888, (2012)
  • [8] Chae H.D., Choi S.B., A new vibration isolation bed stage with magnetorheological dampers for ambulance vehicles, Smart Materials and Structures, 24, pp. 1-14, (2015)
  • [9] Bruzzone L., Molfino R.M., Special-purpose parallel robot for active suspension of ambulance stretchers, International Journal of Robotics and Automation, 18, 3, pp. 121-130, (2003)
  • [10] Niu J., Yang F., Li Y., Multi-dimensional vibration isolation based on metamorphic parallel mechanism, Journal of Vibration and Shock, 33, 7, pp. 206-209, (2014)
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