Two-step procedure for data-based modeling for inferential control applications

A two-step procedure for building an inferential control model, which uses both historical operation data and plant test data, is proposed. Motivation for using the two types of data is given, and a systematic way to combine them in the model-identification step is proposed. Some potential problems associated with the procedure in practice and their solutions are discussed . The efficacy of the procedure is demonstrated in a case study involving a multicomponent distillation column simulated in HYSYS.