Swarms of flying robots might sound a bit ominous to those of us anxiously awaiting the inevitable robot uprising that will see humanity drop a notch on the scale of planetary dominance.
But swarms of flying robots are just what a project at the Ecole Polytechnique Federale de Lausanne (EPFL) in Switzerland is working to create. However, instead of keeping an eye on prisoners in a robot-run internment camp, the Swarming Micro Air Vehicle Network (SMAVNET) Project aims to develop robot swarms that can be deployed in disaster areas to rapidly create communication networks for rescuers.
The individual micro air vehicles (MAVs) are built out of Expanded Polypropylene (EPP) resulting in a weight of just 420g (14.8 ounces). With a wingspan of 80cm (31.5-inches) the MAVs have an electric motor mounted at the back and two control surfaces serving as elevons (combined ailerons and elevator). The robots run on a lithium polymer (LiPo) battery that provides 30 minutes of flying time.
An autopilot controls altitude, airspeed and turn rate, while a micro-controller embedded in the autopilot chooses the most economical flight strategy based on input from three sensors: a gyroscope and two pressure sensors. The autopilot runs on a Toradex Colibri PXA270 CPU board running Linux, which is also connected to an off-the-shelf USB Wi-Fi dongle. In order to log flight trajectories, the robot is also equipped with a u-blox LEA-5H GPS module and a ZigBee (XBee PRO) transmitter.
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