Method for acquiring thrust limiting rules of big and small accelerator of aircraft engine

Abstract

The invention discloses a method for acquiring thrust limiting rules of big and small accelerators of an aircraft engine. The method comprises the following steps: calculating a state deviation valueof the engine, and determining whether the engine is in an acceleration state according to the state deviation value; if the engine is in the acceleration state, acquiring a low-pressure rotor conversion rotational speed control rule curve of the engine when parameters of the aircraft meet the first preset condition; and determining a low-pressure rotor conversion rotational speed corresponding toa first preset time in the low-pressure rotor conversion rotational speed control rule curve, and calculating a fuel oil flow curve of the engine according to the low-pressure rotor conversion rotational speed. By utilizing the control method implemented in the invention, the supply amounts of the fuel oil flow during the actions of the big and small accelerators of the engine can be independently controlled, and the requirement of the thrust change rate is realized.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a method for acquiring the law of limiting throttle thrust of an aircraft engine. Background technique [0002] When the aircraft performs a landing and go-around, the engine needs to provide a large thrust instantly. This requires the engine thrust to respond quickly over time, and this response characteristic is the engine throttle characteristic. The thrust response characteristics of large throttle refers to the thrust response characteristics of the engine from the approach and landing state (thrust is within a certain range) when the throttle lever is quickly pushed up to the intermediate state according to the requirements of the carrier-based aircraft. The large throttle thrust characteristics of the engine can make the aircraft Acceleration gain is obtained for a short time after throttle stick action. The small throttle thrust response characteristic refers to the f...

AI Technical Summary

Problems solved by technology

In order to take into account the performance of the throttle, the fuel supply during the acceleration process is greatly increased. This adjustment will cause the following problems: the higher acceleration fuel will increase the loss of engine life; the engine stability margin will be reduced, and in some special areas within the envelope (such as high-altitude and low Reynolds number areas), the engine may stall or surge during acceleration; even if the acceleration fuel supply is increased, it is difficult to meet the full-thrust change requirements of the throttle

Images