Personalizing exoskeleton assistance while walking in the real world.

Personalizing exoskeleton assistance while walking in the real world.
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DOI:
10.1038/s41586-022-05191-1
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发表时间:
2022-10
期刊:
影响因子:
64.8
通讯作者:
Collins, Steven H.
Collins, Steven H.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Slade, Patrick;Kochenderfer, Mykel J.;Delp, Scott L.;Collins, Steven H.

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Personalized exoskeleton assistance provides users with the largest improvements in walking speed and energy economy but requires lengthy tests under unnatural laboratory conditions. Here we show that exoskeleton optimization can be performed rapidly and under real-world conditions. We designed a portable ankle exoskeleton based on insights from tests with a versatile laboratory testbed. We developed a data-driven method for optimizing exoskeleton assistance outdoors using wearable sensors and found that it was equally effective as laboratory methods, but identified optimal parameters four times faster. We performed real-world optimization using data collected during many short bouts of walking at varying speeds. Assistance optimized during one hour of naturalistic walking in a public setting increased self-selected speed by 9 ± 4% and reduced the energy used to travel a given distance by 17 ± 5% compared with normal shoes. This assistance reduced metabolic energy consumption by 23 ± 8% when participants walked on a treadmill at a standard speed of 1.5 m s−1. Human movements encode information that can be used to personalize assistive devices and enhance performance. A portable ankle exoskeleton uses a data-driven method and wearable sensors to adapt to the user as they walk in a natural setting.
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