Student Exercises

1:Why must the process transfer function be factored in the IMC design procedure? (For example, what happens if the process dead time is not factored out? Also, what happens if a RHP zero is not factored out?)
2:The main advantage to cascade control is the rejection of inner-loop (secondary) disturbances rather than outer-loop (primary) disturbances. True or False?
3:Since you are a young process engineer with a good theoretical process-control background, your boss asks you to work on a problem in the catalytic reforming unit. The process has been having trouble maintaining yield specifications and your boss suspects that part of the problem could be due to the control system. You review the process flow sheets and then proceed ...

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