Abstract:

A moving horizon pseudo-linear regression（MHPLR）method is proposed which is more robust than the original PLR in noisy environment，and requires no on-line optimization. Utilizing the proposed MHPLR，a time series model was recursively estimated on-line to describe the dynamics of the unmeasured disturbances in DMC control system. And the original DMC algorithm was modified in terms of the disturbance prediction. Applied to the PTA solvent dehydration tower，the modified DMC showed effectiveness and efficiency in improving the control performance and reducing the cost.