A Model-Based Framework for Dynamic Antiwindup Strategy for Gas Turbine Engine Fuel Control System

Abstract

Fuel control is usually required to work with the acceleration and deceleration schedules to provide limit protection. However, limit protection will deteriorate controller performance. In this work, we investigate a model-based framework for gas turbine engine fuel control system. First, the gas turbine engine performance degradation due to the actuator saturation in fuel control system is described, and the thermodynamic component-level model and small deviation linear control model are obtained from the experimental data. Then, the problem of antiwindup in gas turbine engine control system is formed and the traditional static antiwindup compensator is introduced. Next, a dynamic antiwindup compensator based on Lyapunov stability is proposed to improve the control performance, and the design of the compensator is formulated and solved in linear matrix inequality framework. One of the notable features of the proposed approach is that the original controller does not need to redesign, and its previous control performance remains unchanged in set-point control. Compared with the static compensator in hardware-in-loop simulation, the proposed dynamic compensator can achieve better performance.