Nonlinear reference tracking control of a gas turbine with load torque estimation

✍ Scribed by B. Pongrácz; P. Ailer; K. M. Hangos; G. Szederkényi

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 188 KB
• Volume: 22
• Category: Article
• ISSN: 0890-6327
• DOI: 10.1002/acs.1020

✦ Synopsis

Abstract

Input–output linearization‐based adaptive reference tracking control of a low‐power gas turbine model is presented in this paper. The gas turbine is described by a third‐order nonlinear input‐affine state‐space model, where the manipulable input is the fuel mass flowrate and the controlled output is the rotational speed. The stability of the one‐dimensional zero dynamics of the controlled plant is investigated via phase diagrams. The input–output linearizing feedback is extended with a load torque estimator algorithm resulting in an adaptive feedback scheme. The tuning of controller parameters is performed considering three main design goals: appropriate settling time, robustness against environmental disturbances and model parameter uncertainties, and avoiding the saturation of the actuator. Simulations show that the closed‐loop system is robust with respect to the variations in uncertain model and environ‐mental parameters and its performance satisfies the defined requirements. Copyright © 2007 John Wiley & Sons, Ltd.