Dynamics modeling and analyzing method for aerospace vehicle

Abstract

The invention discloses a dynamics modeling and analyzing method for an aerospace vehicle and belongs to the technical field of flight dynamics modeling and simulation analysis of aircrafts. According to the dynamics modeling and analyzing method, the variable-span and variable-sweepback aerospace vehicle is simplified and is composed of a fuselage, a left wing inner side, a left wing outer side, a right wing inner side and a right wing outer side, wherein the fuselage, the left wing inner side, the left wing outer side, the right wing inner side and the right wing outer side are independent rigid bodies. The deformation movement of wings relative to the fuselage is represented through a set of constraint equations, so that the freedom degree of a dynamics model is reduced; the aerodynamic force exerted on the aerospace vehicle is simplified to act on the fuselage only, and the dynamics model is established through the Kane method; related items derived from the deformation movement are extracted from the dynamics model to form additional force and additional force moment so that the influence on the dynamics characteristics of the aerospace vehicle by the inertia force and inertia moment caused by the deformation moment can be represented. The dynamics model of the aerospace vehicle is simplified through the dynamics modeling and analyzing method, and integral items and derivation terms of the inertia moment do not appear in the equations. In this way, dynamics modeling and simulating can be easily performed on the aerospace vehicle, and meanwhile accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of aircraft flight mechanics modeling and simulation analysis, in particular to a dynamic modeling and analysis method for variant aircraft. Background technique [0002] In recent years, military and civil aviation have put forward higher and higher requirements for aircraft performance. Aircraft must not only adapt to changes in the flight environment, perform different tasks, but also ensure flight performance and meet economic requirements. The current aircraft technology These requirements cannot be met simultaneously. Variant aircraft technology is a potential technical approach that can effectively solve this problem. The morphing aircraft is an aeronautical aircraft that can change its aerodynamic shape on a large scale to achieve multi-mission flight. The research on variant aircraft has a long history. As early as 1916, someone in the United States had proposed a patent application for "deformati...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing aircraft modeling method is difficult to establish an accurate model of the variant aircraft, and the problem that the deformation motion cannot be accurately analyzed on the dynamics of the variant aircraft

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