Leg isoinertial measurement brace systems and methods

A method of using a leg isoinertial measurement brace, the method comprising:

• providing a device comprising:
• an upper member adapted to fit a wearer's upper leg;
• a lower member adapted to fit a wearer's lower leg;
• wherein the upper member and the lower member are rotationally coupled about a rotational axis;
• a torque cell operatively coupled to the upper member or the lower member and configured to measure torque at the rotational axis;
• a drive assembly configured to transmit torque to the upper member and the lower member about the rotational axis;
• a motor assembly coupled to the drive assembly to actuate the drive assembly;
• and
• a controller comprising a non-transitory computer-readable medium storing instructions that, when executed, cause the motor to actuate the drive assembly to deliver a stored torque profile to the upper member and the lower member about the rotational axis;
• securing the upper member to the wearer's upper leg and the lower member to the wearer's lower leg such that the upper member and lower member are rotationally coupled about the wearer's knee;
• operating the controller to actuate the motor assembly and drive assembly to deliver the stored torque profile to the wearer's leg about the rotational axis;
• measuring, via the torque cell, torque at the rotational axis during actuation;
• transmitting the measured torque to the controller;
• and
• outputting torque measurements or related data to an external computing device or display.

A system for isoinertial measurement and control, comprising:

• a device comprising:
• an upper member adapted to fit a wearer's upper leg;
• a lower member adapted to fit a wearer's lower leg;
• wherein the upper member and the lower member are rotationally coupled about a rotational axis;
• a torque cell operatively coupled to the upper member or the lower member and configured to measure torque at the rotational axis;
• a drive assembly configured to transmit torque to the upper member and the lower member about the rotational axis;
• a motor assembly coupled to the drive assembly to actuate the drive assembly;
• at least one angle measurement sensor configured to detect angular displacement at either a motor shaft or an output joint;
• and
• a controller comprising a non-transitory computer-readable medium storing instructions that, when executed, cause the motor to actuate the drive assembly to deliver a stored torque profile to the upper member and the lower member about the rotational axis;
• and
• a measurement and control system operatively coupled to the device and configured to:
• receive a torque profile and instructions via an interface and store the received torque profile as the stored torque profile;
• execute a control algorithm comprising proportional-integral-derivative logic to regulate motor operation based on feedback from the torque cell and the at least one angle measurement sensor;
• adjust motor response in real time based on measured torque and a received torque response profile;
• and
• output torque measurements or related data to an external computing device or display.