Aircraft modeling method based on variable data length maximum information amount-credibility criterion

Abstract

The invention discloses an aircraft modeling method based on a variable data length maximum information amount-credibility criterion. The method is used for solving the technical problems that the existing maximum information amount criterion does not consider data length so that proving correctness of a pneumatic model and parameters of flying tests is poor. The technical scheme is that by considering the data length in the maximum information amount criterion and introducing credibility parameters, and a modeling criterion is revised according to different flying test factors of an aircraft. U-D decomposition of Rj and Rj+1 is estimated on measuring variance, and scalar model selecting and verification discriminant are obtained. The aircraft modeling method is favorable for building aircraft aerodynamic force and moment models according to flying test data directly, and the technical problems that the maximum information amount criterion does not consider data length directly so as to be wrong to establish and verify pneumatic models with different flying test data are solved.

Description

technical field [0001] The invention relates to an aircraft modeling method, in particular to an aircraft modeling method based on variable data length maximum information amount-credibility criterion. Background technique [0002] According to the aircraft aerodynamic model and parameters, it can not only determine the handling stability of the aircraft, but also provide the correct mathematical model for ground and air simulators; verify the wind tunnel experiments and theoretical calculation results of aircraft aerodynamic parameters; provide support for the design and improvement of aircraft control systems Provide basic data; identify the flight quality of finalized aircraft; study the flight quality of high-performance aircraft; conduct accident analysis of aircraft crashes, etc.; the problem of accurately establishing a mathematical model of an aircraft is completely different from the theoretical method of modeling through basic laws, theorems, etc. , the model is ma...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing maximum information content criterion does not consider the data length, which leads to poor correctness of the aerodynamic model and parameter verification given by the flight test, the present invention provides an aircraft construction based on the variable data length maximum information content-credibility criterion. model method

Images