An Equivalent Model Modeling Method for 3D Motion Phase Plane Analysis of Aircraft with High Angle of Attack

Abstract

The invention relates to a three-dimensional motion phase plane analysis equivalent model modeling method with a large angle of attack of an aircraft, belongs to the technical field of flight mechanics and control, and is used to solve the technical problem of poor stability of the analysis model established by the existing modeling method. The built model avoids incorrect approximations such as ignoring the aerodynamic effect in the aerodynamic moment equation. The equivalent second-order differential equations are obtained through the aircraft motion equation and the experimentally obtained aerodynamic force and aerodynamic moment models; through the equations, it can be directly Apply the phase plane analysis method for theoretical analysis or use the Ode45 module in MATLAB to conduct numerical analysis directly; using this model, you can find more nonlinear phenomena and system instability and unsafe factors, reducing or even avoiding the unsafe factors caused by the analysis model. Problems such as stability and unsafe flight occurred.

Description

Three-dimensional motion phase plane analysis equivalent model modeling method for aircraft with high angle of attack Technical field The present invention relates to a kind of aircraft large angle of attack phase plane analysis equivalent model modeling method, particularly relate to aircraft large Angle of attack three-dimensional motion phase plane analysis equivalent model modeling method. Background technique Aircraft high angle of attack flight is the important symbol of modern and future high-performance aircraft. Use your own position at high angle of attack The pilot can flexibly maneuver the aircraft to roll around the speed axis and make the nose point to any direction quickly. To gain a pointing advantage to attack the enemy, you can also evade the enemy's attack and quickly turn to counterattack to improve your own survivability. force. Therefore, post-stall maneuverability is one of the key factors to gain superiority in air combat, and it is also the k...

AI Technical Summary

Problems solved by technology

Summary of the invention In order to overcome the deficiencies in the poor stability of the analytical model established by the existing modeling method, the invention provides a kind of flying