The relay feedback test (RFT) has become a popular and efficient in
process identification and automatic controller tuning. Non-parametric
Tuning of PID Controllers couples new modifications of classical RFT
with application-specific optimal tuning rules to form a non-parametric
method of test-and-tuning. Test and tuning are coordinated through a set
of common parameters so that a PID controller can obtain the desired
gain or phase margins in a system exactly, even with unknown process
dynamics. The concept of process-specific optimal tuning rules in the
nonparametric setup, with corresponding tuning rules for flow, level
pressure, and temperature control loops is presented in the text.
Common problems of tuning accuracy based on parametric and
non-parametric approaches are addressed. In addition, the text treats
the parametric approach to tuning based on the modified RFT approach and
the exact model of oscillations in the system under test using the locus
of a perturbedrelay system (LPRS) method. Industrial loop tuning for
distributed control systems using modified RFT is also described. Many
of the problems of tuning rules optimization and identification with
modified RFT are accompanied by MATLAB(R) code, downloadable from http:
//extras.springer.com/978-1-4471-4464-9 to allow the reader to duplicate
the results.
Non-parametric Tuning of PID Controllers is written for readers with
previous knowledge of linear control and will be of interest to academic
control researchers and graduate students and to practitioners working
in a variety of chemical- mechanical- and process-engineering-related
industries.
