Study On Optimizing Algorithm Of Civil Aircraft Take-off Distance And Example Analysis

Aircraft performance software, the core technology to calculate and analyze flight performance (such as take-off, climbing and landing skills) by basic parameters of aircraft and engine, is closely related with aerodynamic and thrust characteristics of a specific aircraft. The software used by our airline companies has been supplied by aircraft manufacturers (Boeing and Airbus) for a long time, whose core technology is still blank in China. As the domestic aircraft was approval of airworthiness and delivered to the airline to operate, it is important to develop a performance software with easiness, accuracy, stability and friendly interface which is fit for large domestic aircraft.This paper is based on the take-off distance module the software which uses engineering methods. The methods have caused many problems, for example, the results have big error with manual data. By going into documents in CCAR25related to distance and current engineering methods, I will provide a new idea of segmentation and offer calculation methods and processes for each segment according to aerodynamic database, thrust database and takeoff control features of a domestic aircraft.In this paper, the modified algorithm has been translated into code using high-level assembly language Fortran which is widely used in scientific calculation. In order to perform optimization, these results will be compared with original module and real take-off distance. To explain the situation that it’s simple for the calculation of multiplying flight time with average speed to get distance of the air section, I try to solve the precise mathematical model by Runge-Kutta methods and results analysis.