Tuning of Digital PID Controller for Multivariable Systems Using Local Optimal Controller

Document Type : Original Article

Authors

1 Egyptian Armed Forces.

2 Control systems centre, University of Manchester, Manchester, UK.

Abstract

Abstract:
This paper introduces a new tuning technique for digital PID controller parameters of
multivariable systems. This technique is based on the modified Local Optimal
Controller (LOC) parameters for certain predefined model structures. The modified
LOC parameters can be obtained using the identified parameters of the predefined
model structure. As such, the digital PID controller parameters can be tuned using the
model parameters of certain predefined structures and a single tunable parameter related
to the LOC for each output of the multivariable system. Becoming a model-based
controller, the PID controller parameters can be adjusted in automatic mode.
This new technique is compared with the existing Genetic Algorithm (GA) technique
for tuning digital PID controller parameters. The comparison is based on the
experimental results of the Bytronic Process Control Unit (PCU).

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