Close loop step test used for tuning PID controller by genetic algorithms

Rubén Lagunas Jiménez, Alonzo González Aguilar, Víctor Lanz Gutiérrez De Velasco

Resumen


The identification of multiple points on the process frequency response from a single step feedback test is used. These identified points are there employed to design a PID controller using the multiple-point fifting controller design method. The PID controller is design by minimizing the error between the actual and desired close-loop response in a certain frequency region. The control problem is stated as a nonlinear least squares unconstrained minimization problem. The optimization problem is solved with a simple
genetic algorithm.

Keywords: FFT, genetic algorithm, nonlinear least squares optimization, PID
controller.


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Referencias


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