Go easy on me; first post here.
I'm in this robotics club (UT Austin IEEE RAS), in which we're roboticizing a couch (or, rather, doing it a second time, better). The general idea: motors to wheels on each side of a frame that the couch sits on top of. A previous, mostly broken version is demoed at <https://www.youtube.com/watch?v=kaYiUHjtGvY>. This couch can't handle multiple people, so we're rebuilding it from scratch. To that end, we need better motors.
At the moment, we have a couple CIM motors plus an AndyMark gearbox on each side. Here are our current thoughts: rebuilding, we'll probably end up with a 12 to 48 V DC system (which one depends on the motor), control logic is a breeze for us, and we have very little idea what kind of motor and controller is best. If it exists, a direct drive 24V to 48V DC brushless motor feels right, but we've no idea where to find one. We assume the couch plus people masses up to half a ton.
Do y'all have any suggestions? What should we be looking for?