Study on the correlation model between the change of aircraft’s mass center and oil supply flow rates

Abstract

The change of aircraft’s mass center affects the stability and control of flight, and the change of oil mass in the fuel tanks is one of the important factors that lead to the change of the aircraft’s mass center. In this paper, in order to ensure the stability and reliability of the oil supply for engine and minimize the deviation between the aircraft’s mass center and the ideal mass center, a correlation model between the change of aircraft’s mass center and the oil supply flow rates is presented. According to the requirements of the aircraft’s mass center, the optimal oil supply flow rates of each tank can be obtained quickly, and the deviation between the predicted mass center and the ideal mass center can be minimized during flight. The calculation examples show that the maximum deviation between the predicted mass center and the ideal mass center is 0.63μm when the attitude of the aircraft is always unchanged, and it’s 13.6cm when the attitude of the aircraft is constantly adjusted, which can meet the practical requirements. Therefore, the model presented in this paper has a good applicability in solving the problem of oil supply for the mass center’s balance of aircraft.