Update - August 15th

Awesome news, Ian from Actuonix Motion Devices Inc. has kindly offered to sponsor the actuators needed for this project. I'm now thinking about the mechanics of the solution so that we can order the most appropriate versions. James Chin and Audrey Lee have kindly been helping and their engineering experience is really helpful here. Here are the measurements for my daughters' arm and a rough sketch of the current thinking for our first prototype. I am concerned about the stroke length of the actuators and the torque required. Design points: I'm trying to keep this as light and simple as possible. If at all possible I don't want to build a joint due to weight and complexity. Also, the goal here is to help encourage her to use her muscles as much as possible, I don't want this to become a crutch but rather an assistive device to help in her rehabilitation. this is why I prefer the single actuator solution to the dual actuator solution. I am encouraged by recent research showing that such exoskeleton devices that use sensors and encourage the use of muscles have rehabilitated some paralyzed individuals.