Coordination control method for hypersonic flight vehicle based on dynamic coupling analysis

Abstract

The invention discloses a coordination control method for a hypersonic flight vehicle based on dynamic coupling analysis. The method includes the following steps: establishing a longitudinal system model of the hypersonic flight vehicle; bringing forward a dynamic coupling analysis method of the hypersonic flight vehicle for flight characteristics of the hypersonic flight vehicle; applying the dynamic coupling analysis method of the hypersonic flight vehicle to the longitudinal system model of the hypersonic flight vehicle to obtain a dynamic coupling relationship matrix between a trajectory variable, an attitude variable and a control input variable; and designing a longitudinal system coordination controller of the hypersonic flight vehicle. The method starts from a system dynamic equation, and the obtained coupling relationship matrix is nonlinear and dynamic, which reflects a coupling situation more comprehensively and objectively under an actual flight condition.

Description

technical field [0001] The invention relates to the technical field of aerospace control, in particular to a hypersonic vehicle coordinated control method based on dynamic coupling analysis. Background technique [0002] It is generally believed that greater than 5M a The aircraft flying at high speed is called hypersonic aircraft, which has the advantage of "occupying space and space". It is currently one of the important technical fields that the world's military powers are actively investing in research. However, due to its harsh 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, it has become a research hotspot and difficulty to study the coupling characteristics among the variables of the hypersonic vehicle, and to design a coordinated control system to deal with the coup...

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 during the entire flight phase, which cannot objectively and comprehensively reflect the complex coupling relationship between aircraft variables, and cannot realize real-time coordinated control in the true sense, which will inevitably reduce the performance of flight coordinated control

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