DECOUPLED PREVIEW CONTROL-SYSTEM AND ITS APPLICATION TO INDUCTION-MOTOR DRIVE

This paper shows that optimal preview control system approaches to a d ecoupled preview control system as the weighting factors for the contr ol input variables in the quadratic performance index tend towards zer o. Therefore, to examine the characteristics of the decoupled preview control system also means to examine the asymptotic characteristics of the optimal preview control system. By this property, relationships b etween the design parameters and the response of the optimal preview c ontrol system become clear and the design of the optimal preview contr ol can be simplified by utilizing the properties that the decoupled pr eview control system features. Further, the decoupled preview control method is applied to the vector control system for an induction motor drive. By this application, a trade off between the conditions of the vector control and the magnitude of input variables becomes easy. To d emonstrate the significance of this proposed method, simulation result s of this application are carried out.