Calculation method for braking energy during aircraft aborted takeoff

Abstract

The conventional calculation of braking energy for aircraft is mainly aimed at the landing phase, while there is relatively little research on the calculation method of braking energy for dangerous conditions such as aircraft takeoff suspension. Based on this, combined with the aircraft ground kinematics and dynamics models, and considering the changes in flight parameters during the entire process of releasing the drag parachute during the aircraft's takeoff suspension, according to the principle of energy conservation, a calculation model for the distance of the aircraft's takeoff suspension and a model for the work done during each stage of the aircraft's takeoff suspension are established to simulate and calculate the braking energy, speed, distance, and weight of the aircraft during takeoff suspension under the constraints of airport runway length and braking system energy, ensuring the safety of the aircraft's flight. At the same time, the simulation calculation results will be compared with simplified formulas and test flight values to further verify the rationality and necessity of the simulation calculation, providing new methodological ideas for the brake system design and drag parachute deceleration capability design at the beginning of aircraft design, and also providing reference data for the subsequent airworthiness review and test flight verification of the aircraft.