Users’ adaptations to the proportional speed control of a motorised walker
Users’ adaptations to the proportional speed control of a motorised walker
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用户对电动助行器比例速度控制的适应
DOI：
10.1080/17483107.2021.2017031
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Muraki Satoshi
中科院分区：
文献类型：
--
作者：
Yeoh Wen Liang;Choi Jeewon;Loh Ping Yeap;Saito Seiji;Muraki Satoshi
目的速度控制通常用于调节电动步行机（MW）施加的力，并且经常会出现目标速度偏离用户首选步行速度的情况，例如鼓励更高的步行速度时以及出于安全考虑。本研究调查了不同MW的目标速度对所选择的步行速度，施加的力，感知的努力，和步态的MW用户在稳态walking.Materials和MethodsThe时空步态参数和感知的努力20名年轻的健康参与者进行了测量，因为他们走在一个舒适的，自我选择的速度使用MW，因为它被控制为目标前进速度为0.6，0.8，1.0，1.2，和1.4 ms-1，以及当没有辅助力施加的MW.ResultsOn平均而言，用户会走得更慢时，他们的“无辅助”步行速度高于MW的速度目标，反之亦然。此外，与“无辅助”相比，施加到MW上的力与速度差成正比，无论是更快还是更慢。结论当目标速度接近时，用户的用力和MW使用的能量都会最小化用户的首选步行速度。此外，这些发现表明，速度目标可用于改变用户的步行速度，但仅在一定程度上，并以较高的感知消耗为代价。对康复的影响MW的目标速度和用户的优选步行速度之间的差异越大，用户就越有可能推动或拉动MW。即使在匹配MW的目标速度时，用户也会以与他们的优选行走速度的差成比例的力推动或拉动MW。可以被鼓励以高于首选速度的速度行走，即使这将以更高的感知消耗为代价。
PurposeSpeed control is commonly used to regulate the forces applied by motorised walkers (MW) and there are often situations where the speed targeted deviates from the preferred walking speed of its users, such as when encouraging higher walking speeds and due to safety consideration. This study investigates the effects of different MW’s target speeds on the selected walking speeds, force applied, perceived exertion, and gait of MW users during steady-state walking.Materials and methodsThe spatiotemporal gait parameters and perceived exertion of twenty young healthy participants were measured as they walked at a comfortable, self-selected speed using a MW as it was controlled to target forward speeds of 0.6, 0.8, 1.0, 1.2, and 1.4 ms−1as well as when no assistive force was applied by the MW.ResultsOn average, users would walk slower when their “No Assist” walking speed is higher than the MW’s speed target and vice versa. Additionally, the force applied to the MW is proportional to the difference in speed, either faster or slower, when compared to "No Assist".ConclusionThe user’s exertion and the energy used by the MW are both minimised when target speed is close to the preferred walking speed of the user. Additionally, these findings suggest that the speed target can be used to change the walking speed of users but only to a certain extend and at the cost of higher perceived exertion.Implications for rehabilitationThe larger the difference between the target speed of the MW and the preferred walking speed of the user, the more likely the user is to push or pull on the MW.Users would push or pull on the MW with a force proportional to the difference from their preferred walking speed even when matching the MW’s target speed.Users can be encouraged to walk at higher than preferred speeds, even though this would come at the cost of higher perceived exertion.
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