A switching control strategy of safety protection problem for aero-engines

Abstract

This paper focuses on a switching control of the temperature protection problem for aero-engines. Firstly, an equilibrium manifold expansion (EME) model is established to describe the aero-engine for high accuracy. Then, a speed regulation controller is designed to obtain the asymptotic stability. As the temperature measurements usually have errors for aero-engines, a safety protection control strategy based on the sliding mode control (SMC) is proposed. It can avoid the over-temperature problem for aero-engines, furthermore, possess the disturbance-resistant performance. Then we design an appropriate switching law which makes the aero-engine have a fast transient response speed without exceeding the safety boundary. Finally, a simulation of a two-spool turbofan engine model is given to demonstrate the effectiveness of the proposed method.