Pre-study Of EAST Fast Control Power Supply Gray Prediction Control

This subject comes from the National Natural Science Foundation of China No.11 275056. The main research of the plasma vertical instability tokamak displacement active feedback predictive control. As a project of National Natural Science Foundation, the study of tokamak plasma vertical unstable displacement active feedback prediction control has an important significance to seek clean energy. Superconducting Tokamak is a use of magnetic confinement and vacuum insulation to achieve controlled nuclear fusion circular container, which makes continuous steady-state operation of magnetic confinement bit shape to become a reality. It is a problem that Plasma at high bit elongated shape ratio under vertical instability must overcome. EAST fast control power supply vacuum chamber for rapid active feedback coil excitation control to produce a corresponding magnetic field suppressing displacement to solve the problem. However, the active feedback power supply is time-delay control mode, so it is difficult to increase the active feedback power responding time and excitation ability.For the delay time of sampling and controlling in EAST fast control power supply, the gray prediction which combined with conventional PID control is proposed, the gray prediction GM (1,1) is used to carry metabolic gray filtering and single-step prediction of active feedback control signal, and to amend PID parameter of controller online. The prediction results were used in control operation in place of the measured value of the controlled object. Simulations and experiments were used to illustrate the feasibility of the program’s operation. The MATLAB of fast control power supply control system simulation results show that the feedback, the algorithm can realize advanced regulation, improve the response performance of active feedback control, the EAST fast controlled power slip controller was tested by using TMS320F2812 DSP. The prototype experimental results show that the algorithm can achieve the tracking feedback control of the given signal.