A Revised Weight-Tuning Control Framework for Transient Optimization in Process Industry Using R2R Control.

Recently, run-to-run controller (R2R) has been widely used in process manufacturing, such as fine chemicals industry and semiconductor manufacturing. Numerous control schemes have been developed for various industrial processes to enhance product quality by reducing the output variation. However, previous work was mainly focused on optimizing the steady process while the transient process is seldom considered. Since the production mode is changing from mass production to more diversified and small lot-size production, the transient process will become more and more critical. In this paper, a weighting tuning control framework based on R2R control is proposed which uses the information among the successive batches. The superiority lies in selecting better weighting factors for EWMA controller. Compared to previous work, we derive a better analytical expression for evaluation and after that a recursive algorithm is proposed to estimate important parameters of the process on which the performance of the transient process is closely dependent. The numerical results manifest significant improvement compared with state of the art solutions.