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- Correlation of Helicopter Rotor Tip Vortex Measurement. 直升机旋翼梢旋涡度量的相关。
- Model Helicopter Rotor Aerodynamics and Acoustics As Measured in Tow Anechoic Wind Tunnels. 在两个无回声风洞中测量时模型直升机旋翼空气动力学与声学。
- Aeroelastic model is developed to analyze aeroelastic stability of helicopter rotor blade with swept tips. 通过建立具有后掠桨尖旋翼气弹稳定性的分析模型,研究后掠桨尖旋翼气弹的稳定性。
- The helicopter rotor blade deicing technique is greatly important to ensure the flight safe- ty. 直升机旋翼桨叶除冰技术对保证直升机飞行安全是十分重要的。
- The adaptive optimal decoupling control method of helicopter rotor concordant loading system was discussed. 摘要研究了直升机旋冀协调加载系统的自适应最优解耦控制问题。
- A refined aeroelastic model of a helicopter rotor blade with swept tips is established based on model matching. 以动力学模型和气动模型相匹配为原则，建立了后掠桨尖旋翼的细致气弹模型。
- Hamid Rafati,Ronald W.Du Val,and Ofer Bruhis,”Helicopter Rotor Disk and Element Comparison ”, Advanced Rotorcraft Technology ,pp1258-1265. 李绍勲编译，设计直升机的实用理论，台北:徐氏基金会出版，民国75年7月30日初版。
- An effective multigrid method has been developed to accelerate the Euler solution of transonic flow for a helicopter rotor in hover. 发展了一种加快悬停旋翼无粘流场计算收敛速度的多重网格方法。
- A comprehensive aeroelastic analysis of helicopter rotor with advanced tips based on finite element theory in space and time is coupled with an efficient rotor wake modeling. 研究了前飞条件下旋翼尾迹模型及桨尖后掠对桨叶气弹响应及载荷的影响。 分析基于新型旋翼尾迹模拟方法及时－空有限元法，建立了旋翼桨叶的挥舞、摆振、扭转全耦合的动力有限元方程。
- To fly the aircraft in anything other than a hover the control vanes are used to create a force vector to tilt the machine in the desired direction much like a Helicopter rotor. 飞行中的飞机以外的悬停控制叶片被用来创造一个倾斜力向量机在希望的方向就像直升机旋翼。
- Under icing conditions, helicopter rotor is prone to icing.The rotor icing menaces the safety of the helicopter seriously, so the blade must be protected from icing. 摘要直升机主旋翼桨叶在结冰气象条件下有结冰的危险，为了满足直升机全天候仪表飞行的要求，必须对桨叶采取结冰防护。
- Abstract: The aeroelastic analysis of a helicopter rotor blade with the controlled oscillating trailing edge flap is presented by building an aeroelastic model of the new concept rotor blade. 文摘:通过建立带受控振荡附翼的新概念旋翼气动弹性分析模型，研究了采用受控振荡附翼的直升机旋翼气动弹性特性及其在降低旋翼振动载荷方面的有效性。
- Damping faults in a helicopter rotor hub are diagnosed by using vibration signals from the fuselage.Faults include the defective lag damper and raspings in its flap and feathering hinges. 摘要研究了仅用机体振动信号诊断旋翼减摆器阻尼失效、轴向铰卡涩和水平铰卡涩3种桨毂阻尼故障的可行性。
- The aeroelastic analysis of a helicopter rotor blade with the controlled oscillating trailing edge flap is presented by building an aeroelastic model of the new concept rotor blade. 通过建立带受控振荡附翼的新概念旋翼气动弹性分析模型，研究了采用受控振荡附翼的直升机旋翼气动弹性特性及其在降低旋翼振动载荷方面的有效性。
- aerodynamic characteristics of helicopter rotor 旋翼空气动力特性
- For example, helicopter rotors are now double-taped to reduce wear from the sand. 比如，直升机的旋浆采用了双重密封以减少沙尘的磨损。
- Research on New Helicopter Rotor Shimmy Damper 新型直升机旋翼系统减摆阻尼器动态性能研究
- Helicopter rotor concordant loading 直升机旋翼协调加载
- The shipwrecked sailors were rescued by helicopter. 遭遇海难的水手已经被直升机救起。
- The helicopter had off when we got here. 当我们到达时,直升机已经起飞了。
