A self-protection control method for aero-engine not warm-up state

Abstract

The present application belongs to the field of aircraft engine design, and relates to a self-protection control method for an aero-engine in a non-warm-up state. The method includes: acquiring the engine starting mode and engine state; When the engine state is at or below the idle state, receive the control command of the throttle lever PLA to start the engine; if the engine start mode is cold start, and the engine state is above the idle state, receive the control of the built-in throttle lever PLA command to start the engine, wherein the control command of the built-in throttle lever PLA changes with the trend of the control command of the throttle lever PLA, and the rate of change is controlled within a set value. In this application, after meeting the entry conditions for warm-up start, the engine is controlled by the built-in throttle lever PLA instead of the mechanical throttle PLA, which effectively avoids the engine surge problem caused by quickly pushing up the throttle.

Description

technical field [0001] The application belongs to the field of aircraft engine design, and in particular relates to a self-protection control method for an aero-engine when it is not warmed up. Background technique [0002] When the military small bypass ratio engine is left overnight and then restarted, the engine is in a cold working mode. At this time, the engine needs to be warmed up by pushing up the accelerator to achieve a better engine working condition. When the engine is not warmed up, due to problems such as the mismatch of the engine rotor-stator gap, low aerodynamic stability, and low work efficiency, the drastic state change when the accelerator is pushed up quickly may lead to increased engine vibration and certain Probability of a surge stall, accelerated engine performance attenuation. In the unwarmed state, it is important to intuitively control the engine state change. The current third-generation domestic aircraft and the An-31f engine have not been opti...

AI Technical Summary

Problems solved by technology

When the engine is not warmed up, due to problems such as the mismatch of the engine rotor-stator gap, low aerodynamic stability, and low work efficiency, the drastic state change when the accelerator is pushed up quickly may lead to increased engine vibration and certain Probability of surge stall, accelerated engine performance decay

In the state of not warming up, it is important to control the state change of the engine intuitively. The current domestic third-generation engine and the An-31f engine have not been optimized for the state of not warming up, and there is no similar optimization plan.

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