A Self-Tuning Strategy for Moisture Control in Papermaking

Self-tuning controllers are generally more susceptible to deviations from theory imposed by a practical implementation than most other advanced controllers due primarily to their adaptive nature. The control of moisture content in the papermaking process can create several situations causing parameter divergence or unsuitable estimation or control. Careful consideration of the theory, the process and the limits imposed by each upon the other are required in order to successfully implement a self-tuning control strategy for continuous operation under all circumstances. This paper presents the design strategy for handling these exceptions to the theory along with results obtained to date.