抄録
It is difficult to shoot a ball of high speeds with horizontal and gyroscopic spins for a curently commercial table tennis robot (table tennis machine). In this study, the table tennis machine which can shoot the ball of various shot types (loop, smash, drive, knuckle, chiquite, etc.) was designed. The machine has tow launce and two gyro rollers, and the rotation direction and the revolutions of the four rollers are controlled independently. The shot performances of the machine were simulated using finite element analysis. In the shot simulations, various shot types inthe shot ball were confirmed. From the results of the shot experiments, the machine has high performance to shoot the balls of assorted spin types (top, back, side and gyro spins) with the maximum spin rate (over 12,000 rpm) and a wide range of speeds from 2.8 m/s (10 km/h) to 42.5 m/s (153 km/h). Moreover, the direction of the spin axis of shot ball can be selected as freedom the 360 degrees by the rotary control of two gyro rollers. The launcher mechanism and shot performance in the table tennis machine are described.
