helicopter相关论文
To address deeper understandings about the aero-thermal performance of an integrating infrared suppressor under more rea......
Numerical study of the rotor thickness noise reduction based on the concept of sound field cancellat
Numerical studies were performed to investigate the mechanism and potential of several active rotors for reducing low-fr......
设计了一种新型直升机载防撞激光雷达综合信息处理系统。通过对直升机姿态信息的捕获和修正、目标提取与识别、数据三维空间转换等......
Background We aimed to evaluate the effects of interfacility pediatric critical care transport response time,physician p......
NUMERICAL SIMULATION OF UNSTEADY FLOW FIELD AROUND HELICOPTER IN FORWARD FLIGHT USING A PARALLEL DYN
A parallel Navier-Stokes solver based on dynamic overset unstructured grids method is developed to simulate the unst......
Research on a full envelop controller for an unmanned ducted-fan helicopter based on switching contr
Rotor and ducted-fan structured unmanned helicopters have shown energy efficiency in low flight speed and hovering, due ......
Research on nonlinear model predictive control for turboshaft engines based on double engines torque
In order to reach a compromise between fast response control and torques matching con-trol in double turboshaft engines,......
The submerged inlet is an attractive configuration for advanced helicopters due to its high stealth performance and low ......
Framework of Combined Adaptive and Non-adaptive Attitude Control System for a Helicopter Experimenta
This paper presents a framework of a combined adaptive and non-adaptive attitude control system for a helicopter experim......
针对无人直升机旋翼桨叶性能改进升级的实际需求,以200 kg级无人机旋翼为原型建模,利用COMOSOL软件对直升机桨叶特性进行仿真分析......
A Lagrange dynamic model is established based on small-angle approximation to improve the simulation model for shipbome ......
...
To understand the effect of attitude angle on helicopter water ditching ,a finite element model (FEM ) of helicopter wat......
Aiming at the noise of helicopter scissors tail-rotor ,an advanced numerical method is established by combining computat......
An advanced airload and noise prediction method based on computational fluid dynamics/computational structural dynamics(......
Aerodynamic Performance and Aeroacoustic Characteristics of Model Rotor with Anhedral Blade Tip in H
Experimental investigation on the aerodynamic performance and aeroacoustic characteristics of model ro-tors with differe......
...
In this paper, a local model network H-infinity control is proposed for CE-150 helicopter stabilization. The proposed st......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Due to their low-attitude and relatively low-speed fight profiles, helicopters are subjected to serious threats from rad......
Electrically controlled rotor(ECR) system has the potential to enhance the rotor performance by applying higher harmonic......
Development of swashplateless helicopter blade pitch control system using the limited angle direct-d
It can be greatly beneficial to remove the swashplate of conventional helicopter, because the swashplate is usually comp......
The optimum loading for rotors has previously been found for hover,climb and wind turbine conditions;but,up to now,no on......
A flight dynamics model based on elastic blades for helicopters is developed.Modal shape analysis is used to describe th......
为研究加装格尼襟翼旋翼的直升机飞行性能,建立了加装格尼襟翼旋翼的直升机飞行动力学模型.采用UH-60A直升机试飞数据验证了计算模......
Efficient prediction of ground noise from helicopters and parametric studies based on acoustic mappi
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Numerical study on flow control of ship airwake and rotor airload during helicopter shipboard landin
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
行星传动轮系是直升机传动系统的核心部件,是直升机健康和使用监测系统(HUMS)重要的监测对象。直升机行星传动轮系具有结构复杂紧......
直升机小速度平飞和斜下降飞行时会产生严重的桨-涡干扰(BVI)噪声。基于修正Beddoes尾迹/桨叶动力学耦合方法和Farassat 1A公式,建......
A 3DOF (three degrees of freedom) helicopter attitude control system with multi-operation points is described as a MIMO ......
鲁棒可靠控制器的设计是容错飞行控制系统研究的重要内容,设计思想就是建立系统的正常情况下的模型和故障情况下的模型,根据Lyapun......
It has been not rare to see over-parenting at school especially with the implementation of the one-child policy in China......
航空医疗服务是急救医疗服务体系的重要组成部分,是院外急救领域研究的重要课题之一,也是我国院外急救事业的短板.本文简述空中急......
为了更好地分析和设计直升机飞行控制系统,开发了直升机飞行控制三维动画仿真平台。该平台适用于采用内外回路方法设计的飞行控制......
针对直升机大包线飞行控制问题,以模型逆理论为基础,引入生物免疫应答机理和模糊控制方法,提出了模糊免疫自适应模型逆控制系统设......
针对具有时变不确定性且不确定性界为椭球的线性系统提出了一种新的具有自适应机制的鲁棒保性能控制器设计方法.首先,引入一个具有......
研究了直升机前飞状态下的模糊平滑切换控制方法和仿真验证问题。首先,在不同的平衡点,对直升机模型进行线性化,得到线性子模型集......
直升机载合成孔径雷达(SAR)是微波成像的潜在重要发展方向。由于直升机平台具有高频振动的特殊性,目标在SAR图像上会呈现出对称重......
为了提高单旋翼带尾桨直升机的低空飞行安全性,利用横流风扇流动控制技术,设计了一种可以替代单旋翼直升机尾桨的反扭装置。通过风......
主减速器齿轮啮合产生的中高频谐波振动是直升机舱内噪声的主要来源之一,通过抑制该振动向机体的传递可达到舱内降噪的目的。基于......
Aerodynamic shape optimization for alleviating dynamic stall characteristics of helicopter rotor air
In order to alleviate the dynamic stall effects in helicopter rotor, the sequential quadratic programming(SQP) method is......
针对鸭式旋翼/机翼(Canard Rotor/Wing,CRW)飞机独特的气动布局,常规的分析方法及经验公式很难准确地对CRW飞机进行飞行动力学研究......
发展了一种集成旋翼状态反馈(Rotor-State Feedback,RSF)控制的飞行控制系统,以提升直升机在大气紊流环境中低速飞行时的飞行品质......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Rotor wake analysis,a fundamental research of helicopter technology,has been widely applied for rotor aerodynamic analys......
利用旋翼／机身气动干扰试验数据构造的学习样本，对网络参数进行学习，可以得到旋翼／机身气动干扰神经网络模型，进而可以用该神经网络模型......
