This Chapter considers the problem of quality control for the production of Polymethyl methacrylate (PMMA) to achieve prescribed number and weight average molecular weights. To this end, with a detailed first-principles model used to simulate the process, a dynamic multiple-model based approach is implemented to capture the process dynamics from past batch data. Subsequently, the multiple-model is integrated with a quality model to enable predicting the end quality based on initial conditions and candidate control input (jacket temperature) moves. A data-driven model predictive controller is then designed to achieve the desired product quality while satisfying input constraint, a lower bound on the conversion, as well as additional constraints that enforce the validity of data-driven models for the range of chosen input moves. Simulation results demonstrate the superior performance (10.3% and 7.4%) relative error in number average and weight average molecular weight compared to 20.4% and 19.0%) of the controller over traditional trajectory tracking approaches.
CITATION STYLE
Mhaskar, P., Garg, A., & Corbett, B. (2019). Model predictive quality control of polymethyl methacrylate. In Advances in Industrial Control (Vol. 0, pp. 155–169). Springer International Publishing. https://doi.org/10.1007/978-3-030-04140-3_9
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