Computer-aided Aircraft Fuel

Fuel system is an important part of the aircraft with liquid fuel engines. In this thesis, the calibration, laying and measuring error of the concentric capacitance fuel sensor are researched. And the major work is following:1. Taking the fuel entity of fully-filled airplane oil tank as studying object, the outhor calculates the central points of the section contours and the volume of the remnant fuel under the section height by means of numerical calculation.2. The method to locate and optimize the laying position of the fuel sensor by laminating the fuel entity model along the height axis and finding out the central points of the section contours is also put forward. Besides, the relationship between the length of the sensor that is dipped in the fuel and the remnant fuel volume is established.3. The analysis method of the fuel measuring error caused by the aircraft attitude is presented.4. A software module for the calibration, laying and error analysis of the aircraft fuel sensor is developed and is integrated in the UGII. The module lays foundation for the design of the fuel sensor. Moreover, as an application of this module, the fuel volume calculation and error analysis of two types of training plane are made.