[balfirevic]

Congratulations, this looks fantastic! I'm afraid I don't have anything useful to contribute from medical standpoint, but I have a couple of technical questions if you don't mind.

What kind of actuators are you using (motors/transmission/motor controller)? Are they off-the-shelf parts or developed in-house? What is approximate power/torque?

How did you approach the motion control aspect from the user-safety standpoint? I don't know if the device is powerful enough to cause injury, but if it is - how do you go about development/QA to minimize chance of harm?

Thanks!

[manmeet]

The base actuator is an off the shelf maxon, with our custom sensors and custom motor controller. In terms of motion control, safety was the most important piece when designing our system. There are safety checks in the mechanical, electrical and the software sub system. There is a maximum force that the controller exerts on the child, which can be lowered or increased for each child. In addition to the child resisting, we also had to account for spasticity and sudden tone while walking. The controller detects high resistance and caps off the max force it sends to the motor.