Internal motor spins a cylindrical plate with a weight (a screw) placed on one side creating an up down rapid vibrating movement. This vibration is then conveyed to 3 rods that smoothly propel the model forward in a sliding type movement.
Beacons are mounted on walls or ceilings to measure distance to other beacons and “hedgehog” using ultrasonic pulses. They communicate with router wirelessly in ISM band. Powered by LiPo battery or USB. Indoor Positioning System (IPS)