Research On Electromagnetic Stirring Control System Based On Artificial Bee Colony Fractional PID Algorithm

Electromagnetic stirring technology can effectively improve the control effect in the metal stirring process,which is a vital link to ensuring metal quality.The quality of steel continuous casting smelting is determined by the accuracy of the system model,the rationality of the controller design and the control method.Most of the existing electromagnetic stirring control systems use PID(Proportion Integral Derivative)controllers to control current and frequency.The adjustment links have slow response speed,large overshoot,which is not conducive to the accurate control of the system.As the theory and controller for fractional-order continue developing,this paper puts forward an artificial bee colony(Artificial bee colony,ABC)fractional-order^?(fractional-order PID,FOPID)controller.The three-phase electromagnetic stirring equipment control system accurately controls the system through algorithms,so that the system can quickly reach stability under interference conditions,and have small overshoot,steady great effect.First,the mathematical model of the three-phase rotating magnetic field electromagnetic stirring control system is established.Through the analysis of the physical structure of the electromagnetic stirring control system,the mathematical model of the electromagnetic stirring control system based on SVPWM pulse width modulation is established.The frequency and current decoupling control of the electromagnetic stirring is completed by adjusting the modulation ratio and angle of the SVPWM modulator through the FOPID controller.Secondly,an adaptive chaotic search ABC optimization algorithm is proposed.In view of the fact that the FOPID controller has many parameters and the difficulty of tuning,an improved ABC algorithm is designed.Which adds an adaptive step length in the early stage of the search,and a chaotic search in the later stage,so that the bee colony can automatically adjust the search step length according to the environment and enhance the convergence speed of optimization.Excellent that,using the ergodicity of the chaotic algorithm to solve the problem of easily plunged into local optimum in the later stage of the search,and using the standard test function to do simulation optimization experiments to verify the reliability of the algorithm.Finally,the three-phase rotating magnetic field electromagnetic stirring control system based on the ABC-FOPID algorithm is designed.The PID,FOPID and ABC-FOPID controller modules were built on MATLAB/Simulink simulation software,and the three controllers were compared and simulated with the electromagnetic stirring model.The analysis of the results shows that the electromagnetic stirring system based on the ABC-FOPID control algorithm has fast response speed,small overshoot and great stability.