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Development of a multipurpose test rig - TAILTEST [PDF]
MATEC Web of Conferences, 2021 The paper discusses an innovative multipurpose test rig designed with the aim of full-scale rotorcraft fin verification. The developed test rig includes a load application mechanism able to distribute loads representative for rotorcraft tail structure ...
Oberthor Martin +2 more
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Distributed pod wing modeling and aeroelastic analysis
Xibei Gongye Daxue Xuebao, 2022 基于准线性化隐式建模方法, 建立适用于大展弦比机翼的动力学模型, 研究分布式吊舱机翼的气动弹性特点。其中结构模型采用中等变形梁模型, 气动模型采用准定常理论, 利用小扰动和有限差分法, 建立求解机翼气弹稳定性的方法。在验证结构和气动模型准确性基础上, 研究吊舱的个数、质量、展向站位、弦向/法向偏置等参数对分布式吊舱机翼气动特性的影响。分析结果发现: 吊舱越靠近机翼中部、弦向和法向偏置越大机翼稳定性越高, 但质量分布不均时反而会降低稳定性; 机翼经历了振动收敛、单频简谐振动和倍频简谐振动 ...
CHENG Yi +3 more
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Vibration loads analysis of coaxial rigid rotor in rotor interaction
Xibei Gongye Daxue Xuebao, 2021 A vibration load computing method for a coaxial rigid rotor was developed and applied to analyzing its vibration load in rotor interference. The structural dynamics model based on the medium-size deformation beam theory and the double-rotor aerodynamics ...
Yu Zhihao +3 more
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Aeroelastic stability analysis of rotor blade with complex three-dimensional design
Xibei Gongye Daxue Xuebao, 2023 A rotor dynamic analysis method for the complex three-dimensional design blade was developed and applied to analyzing its aeroelastic stability. Based on the medium-size deformation beam theory and Hamilton principle, the joint transfer matrix was used ...
DENG Jinghui +3 more
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Shock and Vibration, 2022 The gear meshing noise generated by the helicopter main reducer is one of the important sources of noise in the helicopter cabin. By improving the isolation performance of the struts supporting reducer to the gear meshing vibration, the purpose of ...
Yue Hui-yu +5 more
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Shock and Vibration, 2021 Current control laws for active control of helicopter structural vibration are designed for steady-state flight conditions, while the vibration response of maneuvering flight has not been taken into consideration yet.
Yifan Qin +3 more
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International Journal of Aerospace Engineering, 2022 This paper presents a numerical investigation of unsteady surface blowing using periodic variations of jet velocity with azimuthal angle to reduce helicopter rotor blade-vortex interaction (BVI) noise.
Yan Sun, Guohua Xu, Yongjie Shi
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Advances in Mechanical Engineering, 2022 In order to avoid the hard landing on the uneven ground, several robotic landing gears of the rotorcraft are designed. In previous studies, most literature focuses on the control methods of the robotic landing gears.
Lianquan Wu, Yongling Liang, Qi Li
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An Improved Feedforward-Robust Algorithm for Active Vibration Control of Helicopter Maneuver Flight
International Journal of Aerospace Engineering, 2023 To solve the problem of secondary path mutation and external disturbance abrupt changes during helicopter maneuver flight, the previous research proposed a hybrid active vibration control law.
Yifan Qin, Yang Lu, Huiyu Yue
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Micromachines, 2021 Active rotor with trailing-edge flaps is a promising method to alleviate vibrations and noise level of helicopters. Hysteresis of the piezoelectric actuators used to drive the flaps can degrade the performance of an active rotor. In this study, bench-top
Jinlong Zhou, Linghua Dong, Weidong Yang
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