ADAPTIVE DYNAMIC MATRIX CONTROL OF PH

Dynamic matrix control (DMC) was used to neutralize a continuous proce ss stream in a stirred tank. In the presence of large disturbances, th e controller performance deteriorated because of process-model mismatc h. An adaptive DMC was successful in overcoming this difficulty. A clo sed-loop online method has been developed for identification of a proc ess in terms of pseudo impulse response coefficients. Using this schem e a first-order with delay time model was fitted to the process. This model was subsequently used to update the dynamic matrix thus making t he DMC algorithm adaptive.