Comprehensive identification method for motion characteristics of axisymmetric high-speed flight vehicle

Abstract

The invention discloses a comprehensive identification method for motion characteristics of an axisymmetric high-speed flight vehicle. The comprehensive identification method for the motion characteristics of the axisymmetric high-speed flight vehicle is used for solving the technical problem that an existing self-adaptation attitude control method for a hypersonic flight vehicle is poor in real-time performance. According to the technical scheme, the comprehensive identification method for the motion characteristics of the axisymmetric high-speed flight vehicle comprises the steps that a high-speed flight vehicle full mathematical model is established to deduce a control-oriented attitude motion equation, a characteristic equation is established, a functional relationship between parameters of the characteristic equation and sensor measurement is established, parameters of a control-oriented high-speed flight vehicle characteristic model can be obtained rapidly and directly in an online mode through algebraic calculation, and then the parameters are used for adjusting parameters of a self-adaptation controller. Therefore, an iterative operation process needed by a system identification method is omitted, the efficient and rapid identification method is provided for obtaining of system parameters of the flight vehicle, the requirement of the high-speed flight vehicle for time sensitivity is met, the defects and shortcomings of the system identification method are overcome, and real-time performance of a control method for the hypersonic flight vehicle is improved.

Description

technical field [0001] The invention relates to a method for comprehensive recognition of motion characteristics of high-speed aircraft, in particular to a method for comprehensive recognition of motion characteristics of axisymmetric high-speed aircraft. Background technique [0002] The flight envelope range of high-speed aircraft is very large, and the aerodynamic parameters and aerodynamic characteristics change significantly under different flight conditions, while the aircraft is very sensitive to changes in flight conditions when flying at high speed, and there are also large external disturbances and uncertainties in high-speed aircraft These have caused difficulties in the modeling of aircraft dynamics and the design of control systems. In order to make the high-speed aircraft have good flight performance under such complex flight conditions, the adaptive control system is generally used to achieve stronger robustness, and the adaptive control needs to continuously ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of poor real-time performance of the existing adaptive attitude control methods for hypersonic vehicles, the present invention provides a comprehensive recognition method for motion characteristics of axisymmetric high-speed vehicles

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