Researchers at the University of New Mexico have developed algorithms that allow drone quadrocopters to compensate for the motion-induced swinging of hanging loads.
Drones are increasingly used for hauling cargo through the air to get supplies to dangerous areas. In order to do this, helicopters tend to carry stuff suspended on ropes below them. This causes the cargo to swing around fairly violently, particularly if the vehicle needs to manoeuvre. This can make it very hazardous to fly with a suspended load as it changes the flight characteristics of the vehicle.