document: Model predictive control helps to regulate slow processes-robust barrel temperature control Slow temperature control is a challenging control problem . The problem becomes even more challenging when multiple zones are involved , such as in barrel temperature control for extruders . Often , strict closed-loop performance requirements -LRB- such as fast startup with no overshoot and maintaining tight temperature control during production -RRB- are given for such applications . When characteristics of the system are examined , it becomes clear that a commonly used proportional plus integral plus derivative -LRB- PID -RRB- controller can not meet such performance specifications for this kind of system . The system either will overshoot or not maintain the temperature within the specified range during the production run . In order to achieve the required performance , a control strategy that utilizes techniques such as model predictive control , autotuning , and multiple parameter PID is formulated . This control strategy proves to be very effective in achieving the desired specifications , and is very robust
doc_bio_tags: B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O B O O B I I O O O O O O O O O O O O O O O O O O O O O