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Updated: Feb 10, 2026
11:16
Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis
Published on: July 22, 2014
16.7K
A Stair Ascent and Descent Controller for a Powered Ankle Prosthesis
Summary
This study introduces a new control system for powered transtibial prostheses, enabling stair ascent/descent and seamless transitions between activities. The powered prosthesis demonstrated improved stair performance compared to passive devices.
Area of Science:
- Biomedical Engineering
- Rehabilitation Engineering
- Prosthetics and Orthotics
Background:
- Transtibial amputees face challenges with stair negotiation using conventional prostheses.
- Existing passive prostheses offer limited functionality for stair ascent and descent.
- Advanced control systems are needed to restore natural gait and mobility.
Purpose of the Study:
- To present a novel control system for a powered transtibial prosthesis.
- To enable stair ascent and descent capabilities.
- To allow user-controlled transitions between walking, standing, and stair negotiation.
Main Methods:
- A control system was developed and implemented on a powered transtibial prosthesis.
- The prosthesis was evaluated on a single unilateral transtibial amputee subject.
- Gait kinematics and kinetics were compared to a passive prosthesis and non-amputee subjects.
Main Results:
- The powered prosthesis exhibited desirable characteristics during stair ascent and descent.
- The control system facilitated user-controlled transitions between different locomotion modes.
- Comparative analysis showed improvements over a passive dynamic elastic response prosthesis.
Conclusions:
- The developed control system enhances the functionality of powered transtibial prostheses.
- This technology offers improved stair negotiation capabilities for amputee users.
- Further research can optimize powered prosthesis control for greater mobility restoration.
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