Development of crane tele-operation system using laser pointer interface

A teleoperation system for a crane is developed. The crane uses a small actuator and large actuator in each direction (x and y). The large actuator is controlled by input signals from a laser pointer interface, and the small actuator is used as a regulator and is feedback-controlled by a wire angle sensor. To avoid overshoots in the suspended object at the target point and to eliminate the effect of the trembling of the irradiated light by the laser pointer, the velocity commands sent to the large actuator are designed by accumulating cubic functions, each of which is based on the displacement of the irradiated light in a sampling period. The effectiveness of the developed control system and its control algorithm were verified through experimental results.