Reducing aerodynamic vibration of rigid rotors with retreating side active control avoidance  

作　　者：Weiliang LYU 

机构地区：[1]School of Mechanics and Aerospace Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Chinese Journal of Aeronautics》2025年第1期353-364,共12页中国航空学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.12372229);the Aeronautical Science Foundation of China(No.2020Z006063001);the Science and Technology on Rotorcraft Aeromechanics Laboratory Foundation,China(No.61422202110);the Fundamental Research Funds for the Central Universities of China(No.DUT22LK12)。

摘　　要：This paper proposes a new approach to eliminate aerodynamic lift oscillation,called the Dominant Sector Individual Blade Control(DS-IBC)method for rigid rotor helicopters.An Advancing Blade Concept(ABC)rotor model for aerodynamic analysis based on the free-wake method is applied.DS-IBC avoids applying active control on the rotor's retreating side by employing and restricting active control inputs to a sector area of the rotor disc.Outside this sector,only primary collective and cyclic pitch control are used.Each blade takes turns entering the sector,creating a“relay”active control form to ensure continuous control inputs.The method also includes outer-trim and inner-trim iteration modules.Results show that DS-IBC can eliminate aerodynamic lift oscillation using much smaller control inputs than the sine-trim method.By focusing active control on the rotor's advancing side,DS-IBC improves the effective lift-to-drag ratio and reduces the implementation difficulty of active rotor control for aerodynamic oscillation elimination,especially at a large lift-offset.

关 键 词：Advancing blade concept Lift-offset Rigid rotor Aerodynamic lift oscillation Dominant Sector Individual Blade Control(DS-IBC) 

分 类 号：V211.52[航空宇航科学与技术—航空宇航推进理论与工程]