抄録
This study proposes a method of generating the optimized trajectory, which determines change of the displacement of a manipulator with respect to time, to reduce the peak current value or electrical energy occurred in its actuators. Previously, a lot of similar studies have been reported and they usually need the kinetic model of a manipulator. However, the construction of the kinetic model is considerably difficult. Thus, the present study proposes the method that can generate the optimized trajectory without a kinetic model. The method uses a heuristic procedure and obtains evaluation value by measuring the currents, powers and so on of an actual manipulator in operation. The heuristic procedure improves the control data which determines the trajectory of a manipulator by evaluating the measured values. By a repetition of the above process, the method can optimize the trajectory. It takes, however, a long time to determine a trajectory with complicated path. Therefore, we propose a method dividing the path by considering its characteristics for reducing the optimization time. The study applied the method to a commercially available industrial manipulator, confirming that the generate trajectory can reduce electrical energy by about 20%.
