A method for estimating the fuel flow of the wind bucket oil circuit

Abstract

The invention discloses a fuel flow estimating system for an air bucket oil circuit, which comprises: a controller (1), a servo valve (2), an oil pressure sensor before the valve (3), an oil pressure sensor after the valve (4) and a fuel flow rate The calculation module (5); the inlet and outlet of the servo valve (2) are respectively equipped with a front oil pressure sensor (3) and a rear valve oil pressure sensor (4); the fuel flow calculation module (5) is combined with the servo valve (2) The driving current and the pressure signals of the pressure sensors before and after the servo valve (2) estimate the fuel flow in the air bucket oil circuit, and the estimated result is sent to the controller (1), and the controller (1) adjusts the driving current of the servo valve (2) in real time. The present invention uses the collected oil pressure difference between the inlet and outlet of the servo valve and the drive current of the servo valve to realize the estimation of the fuel flow of the air bucket oil circuit, and improves the estimation accuracy of the fuel flow of the air bucket oil circuit, and can solve the problem of oil pressure in front of the servo valve. The impact of large-scale changes on system control has a wide range of applications and high calculation accuracy.

Description

technical field [0001] The invention belongs to the technical field of liquid ramjet engines, and relates to a method for estimating fuel flow in a wind bucket oil circuit. Background technique [0002] The hydraulic ramjet engine wind bucket oil circuit uses a servo valve to adjust the fuel flow. The traditional flow estimation method is to test and calibrate the opening of the servo valve, and estimate the corresponding fuel flow through the opening of the servo valve. Although this method is simple to implement and easy to implement in engineering, the estimation accuracy is low, and it cannot adapt to the influence of large-scale changes in fuel pressure before the servo valve on the system. Contents of the invention [0003] (1) Purpose of the invention [0004] The purpose of the present invention is to provide a method for calculating the pressure difference by using the collected oil pressure before and after the servo valve, and then using the pressure difference...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the pressure difference by using the collected oil pressure before and after the servo valve, and then using the pressure difference and the drive current of the servo valve to realize the method of estimating the fuel flow in the air funnel oil circuit, so as to solve the problem before and after the servo valve. The impact of large-scale changes in oil pressure on system control improves the accuracy of fuel flow estimation

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