| Citation: | SONG Wei, ZHONG Ruoying. Adaptive cross-section segmentation method for aircraft fuel mass properties calculation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(3): 505-514. doi: 10.13700/j.bh.1001-5965.2019.0280(in Chinese)
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For aircraft fuel tanks with continuously varying cross section in aircraft fuel system design, a method for calculating fuel mass properties with cross-section adaptability is proposed. Firstly, the fuel level normal vector is calculated using flight attitude and overload to determine the location of the lowest fuel level. Secondly, the split step is determined based on equivalent fuel entity to perform the first segmentation, and errors will be compensated through subsequent segmentations according to the cross-sectional area changes until the segmentation accuracy reaches preset accuracy threshold. Finally, fuel mass properties are measured and calculated for the segmented fuel entities. The simulation carried out for different types of fuel tanks with continuously varying cross section in fuel system of a certain type of UAVs shows that this method has the cross-section adaptability and can improve calculation efficiency by 71.43%-92.31% compared with conjugate gradient optimization algorithm, while ensuring calculation accuracy. It is suitable for quick and accurate determination of feasibility of design schemes in terms of gravity center by calculating fuel mass properties.
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