Time mark separation aircraft elastomer control method based on nonlinear information

Abstract

The invention discloses a time mark separation aircraft elastomer control method based on nonlinear information, belongs to the field of aircraft control, is especially suitable for a hypersonic-velocity aircraft elastomer, and is used for solving a problem that a conventional elastomer hypersonic-velocity aircraft cannot achieve the rigid-flexible mode separation control. The method comprises thesteps: carrying out the kinetic analysis of a hypersonic-velocity aircraft elastomer kinetic model, and clearly determining the coupling mode of rigid-flexible modes; carrying out the quick-slow timemark decomposition of the model through the singular perturbation theory, and enabling a rigid mode and a flexible mode in the kinetic model to be separated; designing a control strategy based on thelinear information for a slow variable time mark part for representing the rigid mode of the system, and enabling a nonlinear item obtained after model decomposition to be directly substituted into acontroller; designing a sliding-mode control strategy for a quick variable time mark part for representing the flexible mode of the system; finally integrating the two types of control input into onetype of control input as the general rudder deviation, thereby achieving the effective control of the rigid-flexible modes of an aircraft.

Description

technical field [0001] The invention relates to a hypersonic vehicle elastic body control technology, in particular to a nonlinear information-based time scale separation hypersonic vehicle elastic body control strategy, which belongs to the field of aircraft control. Background technique [0002] Existing studies on hypersonic vehicle elastic body control mostly ignore the elastic mode and directly design the controller for the rigid body. As a kind of disturbance, elastic partial control is realized through compensation control. However, this processing method lacks in-depth analysis and research on elastic body dynamics, and cannot effectively analyze the internal rigid-flexible mode of dynamics; through analysis, it can be seen that hypersonic vehicle The elastic vibration frequency of the structure is much higher than the natural frequency of the rigid body of the object, which not only has multiple time-scale processes, but also satisfies the conditions for singular pe...

AI Technical Summary

Problems solved by technology

This method decomposes the elastic body dynamics of hypersonic vehicle with singular perturbation, realizes the separation of fast and slow time scales of the model, and then performs separate control for the decoupled rigid and soft modes, solves the tracking problem of height commands and realizes the elastic mode at the same time. Inhibition, using nonlinear information for controller design to verify the correctness of model decoupling results

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