The Study Of Dynamic Metrix Control Algorithm And Application

Model predictive control (MPC) is an advanced control technique based on model,the algorithm was produced in the practical application of industrial process control.It has been complete and mature in the combination with the industrial application.MPC is not required precise model prediction,and it has strong robustness and control capability on the influence of model mismatch,non-minimum phase systems and uncertainly interference.Dynamic Matrix Control (DMC) is a typical control algorithm in the model predictive control algorithm.The single step prediction of traditional self-tunning technology is expanded to multi steps prediction.Based on the practical feedback information,repeatedly optimization of the algorithm restrains effectively the sensitivity of the algorithm to the changes of the model parameters.It has strong adaptability to the uncertainty such as modeling error and environmental disturbance.Because DMC algorithm is designed on a low order appoximately linear model, there are many uncertainties about the orders of model, unlinearity,envionmental disturbance and timr delay in the complicated industrial processes.Then the study of improvement of DMC and the discussion to the influences of enactment of parameters to robustness have important theoretical significance and practical application value.The dynamic characteristies and robustness and steadilities are studied in this thesis.And PID-DMC algorithm is submit. The ideal control effect is not gained with conventional PID algorithm because of the unlinearity and uncertainty of time varying in the practical production control.The PID-DMC algorithm is submit in this thesis based on the analysis of PID algorithm and DMC algorithm by a new goal function.The induction of basis function makes the input of predictive function control(PFC) obviously disciplinary,improves the control precision of the systems.The simulation to the predictive function control(PFC) system with first-order and time-delay shows that predictive function control has fast response and improve the capability of anti-jamming,robustness and steadity of the control system.