Abstract
Abstract In this paper an iterative scheme for identification and control is discussed. In the identification step a plant model which is suitable for the subsequent controller design step is obtained by estimation of the (dual) Youla-parameter in the time-domain. Using the plant model, the frequency response of the ideal controller, which perfectly realizes the desired closed-loop response for set-point changes is computed. This controller may not be realizable or is of high-order. A realizable, low-order controller is then calculated using frequency-weighted approximation. These steps are repeated until satisfactory performance of the closed-loop system is obtained or cannot be improved further. The proposed scheme is applied to the identification and control of a continuous neutralization reactor.
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