Method and device for large-envelope flight interference estimation

Abstract

The invention belongs to the technical field of automatic control, and in particular relates to a method and device for large-envelope flight interference estimation. The invention aims to solve the problem that the analysis method of the rigid aircraft in the prior art cannot be applied to the flight dynamics characteristics of the elastic aircraft. The present invention provides a large-envelope flight interference estimation method, which includes obtaining input signals and output signals of a large-envelope aircraft respectively, performing fast Fourier transform signal analysis on the input signals and output signals, and dividing the analyzed signals Operation to obtain the Bode diagram of the output signal versus the input signal; extract the sub-region image in the Bode diagram; input the sub-region image of the Bode diagram into the convolutional neural network model for identification, and obtain the category of the sub-region image of the Bode diagram In order to complete the large envelope flight interference estimation. The method of the present invention can form a vibration mode offline learning mechanism of a deep learning mechanism and an online robust flexible identification mechanism, and realize online measurement and calculation of elastic characteristic parameters.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a method and device for large-envelope flight interference estimation. Background technique [0002] As the mission scope of the aircraft continues to expand, its flight envelope becomes larger and larger. Usually the aircraft flies in the atmosphere (within 20,000 meters) and near the edge of the atmosphere (20,000 meters to 100,000 meters), and its flight speed ranges from high subsonic speed to hypersonic speed above Mach 5, and the flight speed varies greatly , the dynamic characteristics of the aircraft also change greatly, so during its flight, the performance parameters of the aircraft, such as structural elasticity, cannot be ignored, and the design of the flight control law has a significant impact on the performance parameters of the aircraft. The control law design method of the aircraft is to meet the flight quality requirements of the aircraft ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the analysis method of the rigid aircraft in the prior art cannot be applied to the flight dynamics characteristics of the elastic aircraft, the present invention provides a method for large-envelope flight disturbance estimation, including:

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