Chapter 10

Open-Loop Testing of
Process Response
This chapter describes how to characterize the response of a
process variable with a controller in manual output mode, that
is, with no feedback from changes in the process variable. Then
tuning rules based on mathematical models of the response are
used to estimate tuning constants for the controller.
Learning Objectives
When you have completed this chapter, you should be able to
1. Understand some procedures for testing the open-loop
response of processes for characterization and mathematical modeling
2. Calculate controller tuning constants by several different
tuning rules
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