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Dynamics modeling and analyzing method for aerospace vehicle

A variant aircraft, dynamic modeling technology, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problem of accurate model of difficult variant aircraft, inability to accurately analyze the dynamic impact of variant aircraft, etc. Achieve the effect of easy numerical calculation and simulation, simplified dynamic model, and reduced complexity

Active Publication Date: 2014-02-19
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Dynamics modeling and analyzing method for aerospace vehicle
  • Dynamics modeling and analyzing method for aerospace vehicle
  • Dynamics modeling and analyzing method for aerospace vehicle

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Embodiment 1

[0101] for figure 1 As shown in the variant aircraft with variable length and sweep angle, according to the specific steps of the dynamic modeling provided by the present invention, a dynamic model of the variant aircraft is established. The specific parameters of the variant aircraft are as follows ( Ma is the Mach number):

[0102] Table 1 Simulation parameter settings

[0103]

[0104]

[0105] The deformation process is: the deformation of the wing is left-right symmetrical deformation, the first step is the aerodynamic layout (1), such as Figure 3A , fully deployed from the outside of the wing, the sweep angle is zero; the aerodynamic layout (2), such as Figure 3B , deformed at a uniform speed until the wing is completely retracted, the sweep angle is 45 degrees, and the deformation time is 1s and 15s respectively; the second step, the aerodynamic layout (3) and the starting layout (4), such as Figure 3C and Figure 3D , carry out the reverse deformation whic...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 吴森堂张杰邢智慧吴晓龙贾翔
Owner BEIHANG UNIV
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