Dynamic equation-based hypersonic-aircraft coupling analysis method

Abstract

The invention discloses a dynamic equation-based hypersonic-aircraft coupling analysis method. The method comprises the following steps: (1) establishing hypersonic-aircraft attitude dynamic-equations; (2) providing the dynamic equation-based hypersonic-aircraft coupling analysis method for flight characteristics of a hypersonic vehicle; (3) applying the dynamic equation-based hypersonic-aircraftcoupling analysis method, which is given in the step (2), to the hypersonic-aircraft attitude dynamic-equations, which are established in the step (1), to obtain dynamic coupling relationships betweenstatus and input; and (4) using the dynamic coupling relationships, which are between the status and the input and in an attitude model obtained in the step (3), to design a hypersonic-aircraft attitude coordination controller. The method starts from the system dynamic-equations, an obtained coupling relationship matrix is nonlinear and dynamic, and coupling situations under actual flight statusare more comprehensively and objectively reflected.

Description

Technical field [0001] The invention relates to the technical field of aerospace control, in particular to a hypersonic vehicle coupling analysis method based on dynamic equations. Background technique [0002] Generally believed to be greater than 5M a The speed-flying aircraft is called hypersonic aircraft, which has the advantage of "occupying the air and space" and is currently one of the important technical fields actively engaged in research by major military powers in the world. However, due to its severe flight environment, complex nonlinear characteristics, and serious nonlinear coupling of its internal variables, it greatly increases the difficulty of flight control and even threatens flight safety. Therefore, in order to improve the flight quality, studying the coupling characteristics between the variables of hypersonic vehicles, and on this basis, designing a coordinated control system to deal with the coupling problem has become a hot and difficult research topic. ...

AI Technical Summary

Problems solved by technology

At present, some scholars and research institutions have done in-depth research on the flight control problem, but they have not paid enough attention to the coupling problem

The existing coupling relationship descriptions are mostly linear and maintain a constant value throughout the flight phase, which cannot objectively and comprehensively reflect the complex coupling relationship between aircraft variables, and will inevitably reduce the performance of flight coordination control

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