Tilting mechanism dynamics optimization method and system for tilting rotor unmanned aerial vehicle

Abstract

The invention discloses a tilting mechanism dynamics optimization method and system for a tilting rotor unmanned aerial vehicle. The method comprises the steps: building a mechanical-electrical-wind multi-physical-field coupling multi-body dynamics theoretical model of a tilting mechanism, and analyzing the force, moment and motion characteristics of the tilting mechanism in a tilting process; analyzing the change rule and influence of related physical quantities of the tilting mechanism through finite element-based multi-physical field simulation, and correcting the theoretical model; on the basis of theoretical model establishment and multi-physical simulation correction of a theoretical model, a tilting mechanism experiment platform is established, and the theoretical model is verified; and optimizing the tilting mechanism on the basis of the verified theoretical model. The method has the advantages of making up the limitation of a single method, comprehensively and deeply analyzing and optimizing, accurately analyzing and optimizing and the like.

Description

technical field [0001] The invention mainly relates to the technical field of unmanned aerial vehicles, in particular to a method and system for optimizing the dynamics of a tilting mechanism of a tilting-rotor unmanned aerial vehicle. Background technique [0002] The tilt-rotor UAV is a composite aircraft, which can be regarded as the product of the combination of fixed-wing aircraft and rotary-wing aircraft. Among them, the leading edge of the wing of the tilt-rotor UAV is equipped with two nacelles that can be tilted, and the rotor constitutes a unique tilting mechanism. In the take-off and landing stages (multi-rotor aircraft mode), the rotors are vertically upward to provide upward lift, and are distributed through multiple rotor combinations to complete attitude control and achieve vertical take-off and landing; in the level flight stage (fixed-wing mode), The tilt mechanism rotates 90 degrees forward to become a propeller fixed-wing aircraft. The wings generate upwa...

AI Technical Summary

Problems solved by technology

However, since the tilting process involves multi-physics coupling of electromechanical and wind fields, its dynamic modeling and simulation are very difficult

Most of the existing research is based on the six-degree-of-freedom particle model, and the modeling is carried out for the purpose of control. The error is large, which leads to the phenomena of falling height, bowing the head and unstable attitude of the aircraft during the tilting process.

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