Currently, rolling resistance and wheelchair stability during manual wheelchair propulsion can be assessed from the loads applied on the front and rear wheels, which are determined in a static condition. However, a user's actions on the wheelchair would change these loads during locomotion, which should affect both the rolling resistance and wheelchair stability. The goal of this study was to verify these assumptions and assess how much the rolling resistance and wheelchair stability are affected by the user's actions during propulsion. For that purpose, a mechanical model was developed using measurements of an instrumented wheelchair equipped with several six-component dynamometers. Experiments were performed by three subjects propelling the instrumented wheelchair over flat ground. The results showed variations over wide ranges of the fore-aft distribution of the total load, rolling resistance, wheelchair stability, wheelchair velocity and mechanical power dissipated by the rolling resistance during the propulsion cycle. In addition, the time courses of all these variables differed with the subject. Finally, this study demonstrated the possibility of assessing intra-cycle values of both rolling resistance and wheelchair stability during manual wheelchair displacements in the field, which provides a technical step towards evaluating a wheelchair user in his daily environment.

译文

:目前,可以通过在静态条件下确定的前后轮负载来评估手动轮椅推进过程中的滚动阻力和轮椅稳定性。但是,使用者在轮椅上的动作会在运动过程中改变这些负荷,这将同时影响滚动阻力和轮椅稳定性。这项研究的目的是验证这些假设,并评估用户在推进过程中的动作对滚动阻力和轮椅稳定性的影响。为此,使用配备了数个六分量测功机的器械轮椅的测量结果建立了机械模型。由三名受试者将实验轮椅推到平坦的地面上进行了实验。结果显示,在推进周期内,总载荷的前后分布,滚动阻力,轮椅稳定性,轮椅速度和由滚动阻力耗散的机械动力的变化范围很大。此外,所有这些变量的时间过程都与主题不同。最后,这项研究证明了在野外手动轮椅移动期间评估滚动阻力和轮椅稳定性的周期内值的可能性,这为评估轮椅使用者的日常环境提供了技术上的一步。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录