Design method of aero-engine acceleration control rule

Abstract

The invention discloses a design method of an aero-engine acceleration control rule. The design method of the aero-engine acceleration control rule comprises the following steps: 1, obtaining the maximum rotating speed difference value; 2, randomly selecting n rotating speed points between the highest stable operation rotating speed and the lowest stable operation rotating speed; 3, dividing an acceleration process into n+1 stages according to the rotating speeds; 4, distributing tj1, tj2, tj3, and the like, tj(n+1) to all the stages; 5, listing the rotating speeds and the corresponding time points which are obtained in the step 3 and the step 4 into arrays; 6, fitting a curve through all points obtained in the step 5; 7, obtaining a rotating speed deviation within a time period from 0 to tj; and 8, showing the universal acceleration control rule at the acceleration time of tj as follows: shown in the specification. The design method of the aero-engine acceleration control rule has the advantage that a method for not taking the oil supply amount of a main combustion chamber as a control target is adopted, so that the dependency of an acceleration process on the control accuracy of the oil supply amount of the main combustion chamber is reduced.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a method for designing an aero-engine acceleration control law. Background technique [0002] The current acceleration control laws of aero-engines are based on the fuel supply of the main combustion chamber as the dependent variable, and the independent variables are slightly different. There are three main types: one is W f =f(t), that is, to control the fuel supply of the main combustion chamber according to the time; the second is W f =f(P 3 ), that is, to control the fuel supply of the main combustion chamber according to the outlet pressure of the compressor; the third is That is, the fuel supply to the main combustion chamber is controlled according to the converted speed of the engine. [0003] The main disadvantages of existing aero-engine acceleration control laws are as follows: first, the scope of application is small, such as the first and second schemes are...

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Problems solved by technology

[0003] The main disadvantages of existing aero-engine acceleration control laws are as follows: first, the scope of application is small, such as the first and second schemes are not suitable for engines with drastic changes in flight conditions; second, the fuel supply to the main combustion chamber is the direct control target, This requires accurate control of the fuel supply to the main combustion chamber in order to meet the acceleration time requirements; third, it is necessary to carry out a large number of machine tests to obtain the optimal control law, and the cost is high; fourth, it cannot better adapt to the individual engine It is necessary to adjust the acceleration control law according to the actual situation of each engine to ensure that the requirements of the acceleration time index are met, and the engineering adaptability is not strong

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