Self-protection control method of aero-engine in unwarmed state

Abstract

The invention belongs to the field of aircraft engine design, and relates to a self-protection control method of an aero-engine in an unwarmed state. The method comprises the following steps that an engine starting mode and an engine state are acquired; if the engine starting mode is cold-state starting and the engine state is a slow running state or a state below the slow running state, a controlinstruction of a throttle lever PLA is received to start the engine; and if the engine starting mode is cold-state starting and the engine state is a state above the slow running state, a control instruction of a built-in throttle lever PLA is received to start the engine, wherein the control instruction of the built-in throttle lever PLA changes along with the trend of the control instruction ofthe throttle lever PLA, and the change rate is controlled within a set value. After the entering condition of warm-up starting is met, the built-in throttle lever PLA is used for replacing a mechanical throttle PLA to control the engine, and the problem of engine surge caused by quick push-up of a throttle is effectively avoided.

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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