Batch process control, from traditional approaches to 2D control

In batch process, it is very important to closed-loop control the key process variables in the quality insurance system. The early studies can be classed to the direct application of advanced continuous control strategies, such as adaptive control and feed-forward control, to deal with the inherent process nonlinear and time-varying characteristics. These control strategies does not make use of the repetitive nature of batch process. Recently, two-dimensional (2D) control strategy has been developed for batch processes control. It is an integration of iterative learning control and feed-back control to handle the repetitive uncertainty and non-repetitive uncertainty, respectively. Both simulation and experimental test results to injection molding, a typical batch process, have shown the effectiveness of the proposed control strategy.