Discretizing continuous-data control systems

Abstract A CAD method is presented for converting existing continuous-data control systems into digital control systems by means of a digital controller. The digital controller is synthetized by matching the frequency response of the digital control system to that of the continuous-data system with a minimum weighted mean-square error. A formula for computing the parameters of the digital controller is obtained as a result. The design technique is illustrated with a numerical example and a comparison with previous methods is also presented.