HORIZONTAL BATCH RETORT CONTROL THROUGH TIME DELAY COMPENSATION

This work was focused on the possibility of time delay compensation in process control systems in thermal sterilisation of canned foods. The results represent three cases: a classical PID control system, a third-order ‘exact' retort model with delay compensation, and a retort approximated by a first-order model with time delay (Smith predictor) and delay compensation. The input experimental data were collected from real objects and processes and compared to the simulated process data in the three modelling versions outlined above.