Meet the RB- SHERPA: a smart mobile robot for indoor and outdoor tasks that can follow a human operator autonomously. It uses steerable motorwheels, featuring an open source, modular design. The robot has a max payload capacity of 100kg. It can go as fast as 3 m/s.
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RB-SHERPA runs for 10 hours on battery. It is based on ROS and has WiFi. The above video shows this robotic platform in action.
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