Three-dimensional linear interpolation table look-up calculation method for aircraft fuel quantity

Abstract

The invention relates to a three-dimensional linear interpolation table look-up method for aircraft fuel quantity. The method comprises the steps that firstly, a one-dimensional fixed point array of an oil level pitch angle alpha of an oil tank under different conditions is determined; under the condition that the one-dimensional fixed point data of the pitch angle alpha of the oil level is determined, a two-dimensional fixed point array of the roll angle beta of the oil level is determined; an oil level height delta three-dimensional fixed point array is determined through the combination ofdifferent oil level pitch angles alpha and oil level roll angles beta; different fuel volumes V formed by the three groups of information is calculated; different combination conditions of the three groups of information and corresponding fuel volumes V are filled into a data table array; an index of a look-up table initial address Pi, j is established according to different oil level pitch anglesalpha and oil level roll angles beta; and finally a fuel volume V under the combination of the three kinds of information is calculated, and correspondingly filled in the data table array according to the look-up table initial address Pi, j. By means of the method, index quick table lookup is conducted according to the table lookup address in actual table lookup, and the method is high in transportability.

Description

technical field [0001] The invention belongs to the field of aircraft fuel calculation, and in particular relates to a three-dimensional linear interpolation look-up table calculation method for the amount of aircraft fuel. Background technique [0002] Fuel quantity measurement can provide pilots with accurate information on the fuel quantity of aircraft fuel tanks, and plays an important role in making correct flight judgments in real time. With the development and progress of science and technology, the requirements for the accuracy, stability and reliability of oil quantity measurement are getting higher and higher. [0003] In order to improve the accuracy of measurement, the current common measures are to increase the dimension of the look-up table and increase the content of the oil quantity data table, and the content of the oil quantity data table changes frequently, which directly brings great difficulties to the calculation of the look-up table. The table look-up ...

AI Technical Summary

Problems solved by technology

[0004] Based on solving the problems of slow table look-up calculation speed and poor portability in the prior art, the present invention proposes a three-dimensional linear interpolation look-up table calculation method for aircraft fuel oil volume, by using a three-dimensional array in advance to determine the fuel volume of different oil levels and its The corresponding query address realizes fast table lookup, and the transplantation of the query table can be realized by changing the parameters of the three-dimensional array, achieving the purpose of quickly calculating the fuel volume and adapting to the fuel volume calculation of fuel tanks with different parameters

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