A direct-drive coaxial rotor system with two steering gears and its control strategy

Abstract

The invention discloses a two-rudder direct-drive coaxial rotor system and a control strategy, which belong to the structural technical field of helicopters. It includes upper rotor power module, upper rotor assembly, upper tilting mechanism, driving servo group assembly, lower tilting mechanism, lower rotor assembly, lower rotor power module, upper fixed main shaft, and lower fixed main shaft. The invention simultaneously drives the upper tilting plate and the lower tilting plate through two steering gears, controls the pitch of the upper and lower rotors in a periodical manner, and provides lifting and heading control forces by controlling the rotating speed of the rotors. The tilting mechanism of the present invention can carry out the azimuth angle offset in advance, and provides flexible design schemes for different rotor characteristics. Compared with the disclosed single-layer periodic pitch-variable coaxial aircraft, it has more sufficient control efficiency and higher wind resistance performance, and compared with the disclosed double-layer periodic pitch-variable coaxial aircraft, it has the least number of rudders The number of machines and the simple structure have effectively improved the reliability of the system and greatly reduced the weight of the structure.

Description

technical field [0001] The invention relates to the field of helicopters, in particular to a direct-drive coaxial 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 utilization rate, so it plays an increasingly important role in air surveillance, load transportation and some special application fields. [0003] Although the coaxial dual-rotor aircraft has many advantages, the 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 other disclosed coaxial a...

AI Technical Summary

Problems solved by technology

[0003] Although the coaxial dual-rotor aircraft has many advantages, the 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 other disclosed coaxial aircraft in order to obtain sufficient control force design is too complicated pitch-changing mechanism

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