Active stability augmentation control method and device for aero-engine

Abstract

The invention belongs to the technical field of engine control, and particularly relates to an active stability augmentation control method and device for an aero-engine. The method comprises the following steps: S1, acquiring aircraft attitude parameters; s2, according to the aircraft attitude parameters, determining that the aircraft flies in a large-overload and high-maneuverability state; s3, according to the height and speed of the aircraft and the attitude parameters of the aircraft, determining an identification margin insufficient working condition, wherein the identification margin insufficient working condition represents the residual stability margin condition of the engine; s4, executing nozzle diameter amplification control, gas compressor adjustable stator blade angle decrease control, gas release valve opening control and stress application oil supply amount increase control under the corresponding working conditions according to the working conditions with the insufficient mark margin. According to the method, by identifying the high air inlet distortion state, the stability augmentation control measures are implemented in a targeted mode, the thrust of the engine cannot be greatly reduced, and meanwhile it is guaranteed that the thrust in other states in the working envelope cannot be reduced.

Description

technical field [0001] The application belongs to the technical field of engine control, and in particular relates to an active stability enhancement control method and device for an aero-engine. Background technique [0002] As a research hotspot at home and abroad, large-scale unmanned combat aircraft is one of the important development directions of the future aviation equipment system construction. Compared with manned aircraft, it can break away from the constraints of human factors, realize the use of maneuvering flight with greater overload, and realize the control of combat usage, etc. upgrade. However, due to the maneuvering flight of the aircraft, the aircraft has a large angle of attack, a large side slip angle, etc., and the air intake conditions of the engine are significantly worse than those currently in service, resulting in a decrease in the remaining stability margin of the engine or instability. Traditional stability enhancement measures do not distinguis...

AI Technical Summary

Problems solved by technology

The above methods do not distinguish the use status and scene of the engine. For UAVs, compared with manned aircraft, they can achieve greater overload use. In the case of significantly increased intake distortion, the remaining margin is reduced. If the above methods are adopted, Undoubtedly, it will lead to a significant reduction in engine performance and affect the combat capability of the aircraft. In use, there are shortcomings that cannot take into account both stability and thrust performance.

Images