Publisher : Korean Institute of Navigation and Port Research
DOI : 10.5394/KINPR.2015.39.6.457
Title & Authors
Speed Control of Marine Gas Turbine Engine using Nonlinear PID Controller Lee, Yun-Hyung; So, Myung-Ok;
A gas turbine engine plays an important role as a prime mover that is used in the marine transportation field as well as the space/aviation and power plant fields. However, it has a complicated structure and there is a time delay element in the combustion process. Therefore, an elaborate mathematical model needs to be developed to control a gas turbine engine. In this study, a modeling technique for a gas generator, a PLA actuator, and a metering valve, which are major components of a gas turbine engine, is explained. In addition, sub-models are obtained at several operating points in a steady state based on the trial running data of a gas turbine engine, and a method for controlling the engine speed is proposed by designing an NPID controller for each sub-model. The proposed NPID controller uses three kinds of gains that are implemented with a nonlinear function. The parameters of the NPID controller are tuned using real-coded genetic algorithms in terms of minimizing the objective function. The validity of the proposed method is examined by applying to a gas turbine engine and by conducting a simulation.
gas turbine;proportional-integral-derivative control;nonlinear controller;RCGA;performance index;
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