On-line recognition of push-off for powered transtibial prosthesis towards speed adaptation
نویسندگان
چکیده
منابع مشابه
Speed adaptation in a powered transtibial prosthesis controlled with a neuromuscular model.
Control schemes for powered ankle-foot prostheses would benefit greatly from a means to make them inherently adaptive to different walking speeds. Towards this goal, one may attempt to emulate the intact human ankle, as it is capable of seamless adaptation. Human locomotion is governed by the interplay among legged dynamics, morphology and neural control including spinal reflexes. It has been s...
متن کاملIncreasing ankle push-off work with a powered prosthesis does not necessarily reduce metabolic rate for transtibial amputees.
Amputees using passive ankle-foot prostheses tend to expend more metabolic energy during walking than non-amputees, and reducing this cost has been a central motivation for the development of active ankle-foot prostheses. Increased push-off work at the end of stance has been proposed as a way to reduce metabolic energy use, but the effects of push-off work have not been tested in isolation. In ...
متن کاملWithin-socket myoelectric prediction of continuous ankle kinematics for control of a powered transtibial prosthesis.
OBJECTIVE Powered robotic prostheses create a need for natural-feeling user interfaces and robust control schemes. Here, we examined the ability of a nonlinear autoregressive model to continuously map the kinematics of a transtibial prosthesis and electromyographic (EMG) activity recorded within socket to the future estimates of the prosthetic ankle angle in three transtibial amputees. APPROA...
متن کاملConcept of a Series-Parallel Elastic Actuator for a Powered Transtibial Prosthesis
The majority of the commercial transtibial prostheses are purely passive devices. They store energy in an elastic element during the beginning of a step and release it at the end. A 75 kg human, however, produces on average 26 J of energy during one stride at the ankle joint when walking at normal cadence and stores/releases 9 J of energy, contributing to energy efficient locomotion. According ...
متن کاملAn Off-Line Approach for Generating On-Line Adaptation Policies
Industry trends towards virtualization and server consolidation are opening new avenues for improved efficiencies through adaptive system management. However, writing effective policies that specify when and how an adaptive system should adapt is still a difficult, error-prone activity. Quantitative models open the door for automatic policy construction by providing ways to quantify alternative...
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ژورنال
عنوان ژورنال: SCIENTIA SINICA Technologica
سال: 2018
ISSN: 1674-7259
DOI: 10.1360/n092018-00189