Study Of Generalized Predictive Grey Self Rectify Control Algorithm

Predictive control as one kind of new computer control algorithm applies to a lot of fields including industry process control broadly. It has the distinct characteristics such as optimizing and coupling back adjustment rolling owing to the model . Since predictive control being put forward , several tens kind has appeared, the concrete form of predictive control has been furthermore of color and variety. Generalized Predictive Control (GPC) which appeared in 80's,is a new type of computer control method and one of the most representation algorithms. It has received increasing attention in the field of control and industry.Firstly, this text introduces the basal principle of predictive control,and the generalized predictive control as an example of predictive control is introduced to the algorithm of predictive control. Predictive function control being one kind of new predictive control method in the past few years has been doubly paid close attention to,whose maximal characteristic is the simplicity control algorithm,the short real-time control calculates amounts , especially applying to rapidly systematic control. Therefore, specifically for the slow speed of response,the big amounts and the poor fleetness,predictive function control is introduced to the generalized predictive control.And one kind GPC fleetness algorithm based on predictive function control is suggested . The algorithm has decreased the amounts , shortened system REST obviously, improved systematic fleetness.Secondly,allow for parameter value of ARMA model in Recursive Least Squares and Recursive Extended Least Squares recursion slowly,anti-interference ability is low.This text adopts gray system theory which has simple algorithm and strong anti-interference ability to identify mode parameter in line and to amend model error in time.Three order gray system theory is lead into generalized predictive control algorithm,and the generalized predictive grey selfrectify control algorithm is suggested.The control effects are fine.The output signal can get to setting value stably, it has reached comparatively highly to track accuracy.Finally,this text simulates this GPC algorithm based on predictive function,the basal GPC algorithm , the generalized predictive grey selfrectify control algorithm based on predictive function and the basal generalized predictive grey selfrectify control algorithm for three and four order system model.The result indicates that the algorithm leading into predictive function has improved systematic fleetness indeed.