Design And Development Of A Locking Mechanism For A Gear-Based Prosthetic Knee Joint
This thesis is based on the project about design and development of a locking mechanism for a gear-based knee joint prosthesis. The purpose to design and develop the locking mechanism is to provide stability when the user is standing upright to avoid sudden buckling or falling down. The projec...
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| Format: | Monograph |
| Language: | English |
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Universiti Sains Malaysia
2019
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| Online Access: | http://eprints.usm.my/58292/ http://eprints.usm.my/58292/1/Design%20And%20Development%20Of%20A%20Locking%20Mechanism%20For%20A%20Gear-Based%20Prosthetic%20Knee%20Joint.pdf |
| Summary: | This thesis is based on the project about design and development of a locking
mechanism for a gear-based knee joint prosthesis. The purpose to design and develop
the locking mechanism is to provide stability when the user is standing upright to avoid
sudden buckling or falling down. The project is started with the study of the human gait
cycle movement, lower limb prostheses and design of gear-based knee joint prosthesis.
Then, this project is followed by conceptual development of locking mechanism,
prototype development and testing of the prototype. The final design being selected is
an electromagnet based locking mechanism with a control circuit. The electromagnet is
controlled by a microcontroller to lock or unlock the knee joint via the position detection
by a gyro sensor during thigh movement. During prototype development, the modified
gear-based knee joint prosthesis with the proposed locking mechanism are fabricated.
Then, an experiment is conducted to test the functionality of the locking mechanism
and overall performance of the gear-based knee joint prosthesis. The result shows that
the proposed locking mechanism incorporated in the gear-based knee joint is working
well with the program loaded to the microcontroller. The electromagnet based locking
mechanism also enabled the gear based knee joint to recreate the lower-limb gait cycle
closer to that of a healthy individual. Although the measure of the stability performance
is not possible due to the unavailability of testing facility, it is obvious that the knee
locking mechanism would enhance the stability performance and safety measure of that
gear based knee joint prosthesis to some extent. For the development of this project and
future works, some suggestions are made for refining the product. The suggestions are
to ensure the product is suitable and safe to be used by all the amputees. |
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