Two-steering-engine coaxial double-rotor system and control strategy

Abstract

The invention discloses a two-steering-engine coaxial double-rotor system and a control strategy thereof, and belongs to the technical field of helicopter structures, the two-steering-engine coaxial double-rotor system comprises an upper driving module, an upper rotor assembly, an upper swash plate assembly, a central assembly, a lower swash plate assembly, a lower rotor assembly and a lower driving module. Compared with a common scheme that two steering engines can only adjust the single-layer periodic variable pitch, the technical scheme has the advantages that under the condition that onlytwo steering engines are used, the variable pitch of the upper-layer rotor wing and the lower-layer rotor wing is controlled at the same time, and the control performance of pitching and rolling of the upper-layer rotor wing and the lower-layer rotor wing is exerted with the minimum number of the steering engines. And the characteristic that the rotor wings can change speed is utilized to solve the problem that the total distance control is not increased or decreased under the two-steering engine scheme. Lifting and heading control force is provided by adjusting the rotating speed of the upperrotor wing and the lower rotor wing. The structure with large specific gravity is located in the middle of the rotor system, the gravity center of the system is closer to the power center, and structural arrangement of loads, energy and other modules is better facilitated.

Description

technical field [0001] The invention relates to the field of helicopters, in particular to a coaxial dual-rotor system with two steering gears and a control strategy. Background technique [0002] Since the coaxial dual-rotor aircraft does not need the balance torque provided by the tail rotor, the anti-torque of the upper and lower rotors balances each other. Compared with single-rotor helicopters and multi-rotor aircraft, it has a smaller volume and has a smaller storage volume. Compared with multi-rotor aircraft, coaxial multi-rotor aircraft also has higher energy efficiency, so it is increasingly occupying an important position in various application fields such as air surveillance and load transportation. [0003] Although the coaxial dual-rotor aircraft has many advantages, the existing disclosed coaxial aircraft has insufficient flight control force and poor wind resistance due to the use of a simple single-layer periodic pitch change mechanism. Or design an overly ...

AI Technical Summary

Problems solved by technology

[0003] Although the coaxial dual-rotor aircraft has many advantages, the existing public coaxial aircraft adopts a simple single-layer periodic pitch-variable mechanism, resulting in insufficient flight control force and poor wind resistance.

Or design an overly complicated pitch-changing mechanism to obtain sufficient control force

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