Abstract: In order to study the wave making technology of active striking box in a wide glass water tank（10 m×0.5 m）, this paper designed a wave making system based on a PLC motion controller, servo motor and driver, industrial computer and wave height acquisition instrument. The system implements an active wave making algorithm in the PLC motion control program according to the hydrodynamic parameters. It not only uses the AC servo driver and the motor of the same size to complete the wave making undulations of the wedge plate, but also controls the overall state of the wave making machine system through the man-machine interface on the industrial computer. To improve the control accuracy, the closed-loop control of wave height and frequency based on a PID algorithm is added to the external closed-loop control of the servo driver. A practical application shows that the system can ensure the accuracy and stability of control by real-time feedback of the waveform, and achieve the purpose of active wave making.

Key words: wave maker, PLC motion controller, server motor, PID algorithm