**Description**
Indication of fuel tanks of aircrafts are important to monitor correct value of fuel which is directly means remaining distance of flight on the dashboard. Grounded vehicles like trucks, oil tankers, commercial cars also have these kind of indication systems except one additional parameter which has vital role on aircrafts’ indication system. This parameter is named after attitude dependent free surface condition which affects entire fuel tanks of aircraft. At different flight conditions, fuel tanks are under effect of different gravitational vector depends on pitch and roll attitude angles. Additionally, submerged probes gives volume data depends on submerged height of its body and as a result of different gravitational vector effects, different look-up tables (LUT) are required to use in order to get correct remaining fuel amount from submerged probe to indication system of aircraft. In order to generate multiple tables of multiple attitude conditions and high resolution of indication stencil requires automatized processes of scanning of fuel to global z-axis functions. In that paper +15° and -10° of pitch angles and ±5° roll angles are meshed with 1° accuracy, in addition 2 pieces of 300mm probes are divided into 1mm long pieces for process. All probe pieces represents a certain volume of indicated tank and 300 data for each probe, 286 different combinations of attitude angle set for each free surface angles. The entire process of LUT generation requires basically run measure command of CAD modeler 85800 times. It has to be automatized and programmed in suitable environment. It is programmed with usage of Siemens NX CAD modeler, macro is coded in Visual Basic and also is run at Siemens NX Environment in order to catch continuous measurement data. After generating LUTs, in Siemens Amesim environment, indication system is modeled as a 1D model and it is made ready-to-use for indication software.

**Author(s) - ranked in descending order of contribution / as it should appear when published**
Kerem Karahan, Yunus Suat



Generating Look-up Table Set and Constructing Fuel Indication System of Aircraft Fuel Tanks

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