The SNR of the helicopter blade echoes is small when the MMW radar has low pulse repetition frequency.
针对低重频毫米波雷达直升机旋翼回波信号检测中旋翼回波信噪比低的问题,本文采用发射大时宽带宽的线性调频信号,接收匹配滤波处理以增加旋翼回波信号的信噪比,并推导了线性调频旋翼回波模型。
The main research object in this dissertation is helicopter blade dynamic balance experimental platform system.
本论文所属课题是直升机旋翼动平衡实验台系统设计，在本论文中主要对论文课题的背景和意义、共锥度测量系统的设计与实现以及控制系统和系统软件及数据处理等方面进行了介绍。
intermeshing rotors helicopter
交叉旋翼式直升飞机
Rotor-wing interaction analysis of a compound helicopter in forward flight
复合式直升机前飞状态旋翼-机翼干扰计算分析
stowed rotor vehicle
旋翼收藏式组合直升机
tandem rotors helicopter
纵列式双旋翼直升机
intermeshing-rotor helicopter
交叉双旋翼式直升机
Numerical prediction for the acoustic noise of helicopter rotor in forward flight
前飞状态下直升机旋翼旋转噪声预测
Influence of wing location on rotor-wing interaction of compound helicopter
机翼位置对复合式直升机旋翼-机翼干扰的影响
the long airfoil that rotates to provide the lift that supports a helicopter in the air.
旋转使飞机上升并支持直升飞机在空中飞行的长机翼。
An aircraft, such as a helicopter or autogyro, equipped with wings that rotate about an approximately vertical axis.
旋翼机一种飞行器，如直升机和旋翼机，装有绕一个近似垂直的轴旋转的机翼
Unsteady Aerodynamics Investigation for the Isolated Rotor in Large Amplitude Maneuvering Flight;
直升机大机动飞行中旋翼非定常空气动力研究
fan-in-wing VTOL
翼内升力风扇式垂直起落飞机
a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor.
单转子直升飞机尾部上的旋转机翼；防止直升飞机的旋转方向与主转子相反。
the large rotating airfoils on a single-rotor helicopter that produce the lift to support the helicopter in the air.
单转子直升飞机上的大的旋转机翼，能够产生拉力使直升飞机升入空中。
Stability and control analysis of rotor/ducted-fan based unmanned helicopter
旋翼/涵道风扇共轴式无人直升机操稳特性研究
Investigation on Wing-Rotor Aerodynamic Interaction of the Compound Helicopter in Hover;
复合式高速直升机悬停状态旋翼/机翼气动干扰研究
an autogiro is supported in flight by unpowered rotating wings.
旋翼飞机靠无动力的旋转式机翼支持其飞行。
He sketched dozens of propeller-driven helicopters, parachutes, and ornithopters with flapping wings,
他设计了几十张靠螺旋桨驱动的直升机、降落伞和扑翼飞机草图，
Numerical simulation of flowfield of helicopter rotor and fuselage in forward flight based on unstructured embedded grid technique
非结构嵌套网格的直升机旋翼/机身前飞流场数值模拟