A compliant add-on mechanism for polycentric prosthetic knees was designed to provide two additional features beyond those already provided by the knee, the additional features being a stable equilibrium position when the knee is bent for the sitting posture and a moment-rotation profile that helps prevent excessive heel rise. The mechanism, dubbed the Bistable Compliant Extension Aid (BCEA), was developed and analyzed using finite-element-analysis (FEA) software. The BCEA was shown to satisfy the design requirements, prevention of excessive heel rise and providing a stable sitting position, based on its reaction moments for knee flexions ranging between 0 and 90 degrees.
- Design Engineering Division and Computers in Engineering Division
Bistable Compliant Extension Aid for a Polycentric Prosthetic Knee
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Roetter, AD, Lusk, CP, & Dubey, R. "Bistable Compliant Extension Aid for a Polycentric Prosthetic Knee." Proceedings of the ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 7: 33rd Mechanisms and Robotics Conference, Parts A and B. San Diego, California, USA. August 30–September 2, 2009. pp. 241-248. ASME. https://doi.org/10.1115/DETC2009-86990
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