IOP320 Metso DCS Card METSO Controller, Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, technical transfer in the fields of intelligent technology, information technology, and automation technology. We provide electrical equipment, automation equipment, electronic products,
Different speeds of three-phase asynchronous motors correspond to different wave heads, wave lengths, and wave peaks. Therefore, different speed combinations of two three-phase asynchronous motors can simulate and reproduce various sea conditions in real-time. The current generation system is also controlled by a combination of PLC and PLC to regulate their respective power water pumps, generating different water flow energies. The wind generation system is achieved by PLC controlling high-power fans.
IOP320 Metso DCS Card METSO Controller, To achieve the above functions, the system adopts a hierarchical and modular concept, enabling true distributed control. Among them, the wave generation subsystem, current generation subsystem, and wind generation subsystem can each be controlled by two PLCs. Sea conditions include large waves, small waves, and ripple waves. To realistically simulate sea conditions, larger waves are controlled by PLC, while small waves and ripple waves are controlled by PLC. The current generation subsystem operates similarly. Only in this way can the simulation of sea conditions include many small high-head waves within two large wave cycles. The wave generation process is as follows: The analog output function module of the PLC outputs a 0–10V control signal to regulate the output frequency of the FR-E540 frequency converter. The frequency converter controls the speed of the three-phase asynchronous motor in real-time. The motor drives the paddle of the wave maker to strike the water surface. Different motor speeds result in variations in wave length and peak between two wave heads. Thus, different speeds of the three-phase asynchronous motor correspond to different wave heads, wave lengths, and wave peaks. Therefore, different speed combinations of two three-phase asynchronous motors can simulate and reproduce various sea conditions in real-time. The current generation system is similarly controlled by a combination of PLC and PLC to regulate their respective power water pumps, generating different water flow energies. The wind generation system is achieved by PLC controlling high-power fans.
To enhance reliability, a manual backup speed regulation system is designed in this control system to ensure that wave generation is not affected by computer failures. When a computer failure occurs, the switching device automatically shifts to the manual backup speed regulation system without manual intervention. Operators can adjust the frequency converter speed via a potentiometer to maintain normal wave generation. The system configuration consists of three local control units composed of three frequency converters and three-phase asynchronous motors, along with a server and human-machine interaction server architecture based on a PC.