The ankle subteam is responsible for designing an ankle brace that will simulate movement for the user. The torque for ankle was calculated using T = m*g*l. The torque was calculated as T = 3.4 N*m. A 20% safety margin was used, increasing the required torque to 4.08 N*m. The selected servo has a maximum torque of 4.8 N*m at 7.4 V. The stall current is 3 A, and the idle current is 3 mA. The power consumption range was calculated to be from 0.022-22.2 W. The brace being used was donated to the group.
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- Ankle Motor
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- Knee brace (left) and ankle brace (right)
Progress made as of 12/2/2014:
- Mounted prototype servo to brace
- Preliminary testing of servo
Future steps to be completed in ECE 493:
- Remove servo/mount motor
- Test durability of leg brace with motor mounted on it
- Test torque output and angle of rotation
