搜索结果: 1-15 共查到“工学 Rotor”相关记录49条 . 查询时间(0.083 秒)
MULTI ROTOR UAV AT DIFFERENT ALTITUDES FOR SLOPE MAPPING STUDIES
Slope Environment UAV Accuracy Contour
2015/9/10
Most of consultation work only involves a small area, especially for slope mapping studies. The objective of this study is to evaluate the accuracy of slope mapping results from different altitudes at...
SONGBIRD – AN INNOVATIVE UAS COMBINING THE ADVANTAGES OF FIXED WING AND MULTI ROTOR UAS
UAV VTOL Fxed wing Wing Copter Resource management Pipeline inspection Cartography
2015/9/10
This paper describes a family of innovative fixed wing UAS with can vertical take off and land – the SONGBIRD family. With nominal payloads starting from 0.5 kg they can take off and land safely like ...
Time-accurate simulation of helicopter rotor flows including aeroelastic effects
Time-accurate simulation helicopter rotor flows including aeroelastic effects
2015/7/1
The following work presents recent developments in the simulation of helicopter rotor flows in the hover and forward flight regimes. The simulations are carried out by solving the full time-accurate c...
Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius
cooling system rotor-stator system flow characteristics pressure distribution resistance coefficient
2015/5/12
Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the st...
Coupled Dynamic Analysis of Flow in the Inlet Section of a Wave Rotor Constant Volume Combustor
wave rotor coupled analysis
2015/1/12
A wave rotor constant volume combustor (WRCVC) was designed and built as a collaborative work of Rolls Royce LibertyWorks, Indiana University-Purdue University at Indianapolis (IUPUI), and Purdue Univ...
Multi Rotor Wind Turbine Design And Cost Scaling
Multi Rotor Wind Turbine Design Cost Scaling
2014/10/23
The current generation wind turbines are upscaled into multi megawatt range in terms of output p ower. However, the energy b enefit from the turbine is offset by the increased mass and cos t. Twenty M...
Automated Data Acquisition System For Th Wind Rotor Test Facility
Automated Data Acquisition System Wind Rotor Test Facility
2014/10/21
Automated Data Acquisition System For Th Wind Rotor Test Facility.
分析了气流扰动、翼间干扰等因素对飞行中的无人飞行器的控制精度和效果产生的影响, 并给出了相应的解决方法。建立了Hex-Rotor飞行器的动力学模型, 分析了升力因子不确定性导致飞行器控制效果下降的影响因素。设计了反演滑模控制器来控制飞行器的空间六自由度运动, 同时考虑升力因子的不确定性采用超螺旋非线性观测器观测各个旋翼的升力因子来克服气动干扰的影响。通过原型机验证了提出的方法, 结果显示:Hex-...
Rotordynamic prediction of mode order transition when rotor has an overhang
rotordynamics turbomachinery rotor with overhang console modes balancing
2015/3/11
Nowadays rotating machinery grows and develops extremely fast due to its multi-branch application. Although the fields of rotordynamics and rotor balancing had a strong background based on previous ex...
Numerical investigation of windage heating within shrouded rotor-stator cavity system with central inflow
flow structure recovery temperature gap ratio
2014/12/11
The rotating disk surface temperature rise due to windage heating effect by numerically modeling the turbulent flow within a rotor-stator cavity which is available with a peripheral shroud and imposed...
Hex-Rotor无人飞行器及其飞行控制系统设计
多旋翼飞行器 滤波反步法 自抗扰技术 双环并行结构
2014/3/24
提出了一种Hex-Rotor无人飞行器以克服现有多旋翼飞行器的欠驱动和强耦合特性对其飞行控制效果的影响,利用6个旋翼独特的结构配置来保证飞行器独立控制空间六自由度的能力。介绍了这种新型飞行器的结构特点并建立其动力学模型,引入滤波反步法与自抗扰算法设计了具有双环并行结构的飞行控制系统,在数字仿真中实现了飞行器的空间六自由度独立控制并克服了未知外部扰动以及模型不确定性带来的影响。结果显示,原型机试飞实...
Experimental Analysis on Properties of Rotor-Spun Composite Yarns and Sirofil
rotor-spun composite yarns sirofil longitudinal view abrasion resistance hairiness breaking strength
2011/12/31
Different kinds of yarns have different structures and performance because of different spinning type. A rotor-spun composite yarn spinning system was developed which produces different kinds of compo...
Experimental Investigation on Vibration Control of Rotor-bearing System with Active Magnetic Exciter
vibration control rotor-bearing system active magnetic exciter
2011/8/5
Vibration control is an efficient way to minimize a rotating machine’s vibration level so that its vibration fault-free can be realized. While，several factors, such as unbalance, misalignment and inst...
Numerical Investigation on Fluid Structure Interaction Considering Rotor Deformation for a Centrifugal Pump
centrifugal pump fluid structure interaction coupled solution
2011/8/5
The existing researches for unsteady flow field and the corresponding flow induced vibration analysis of centrifugal pump are mainly carried out respectively without considering the interaction betwee...
DISCUSSION AND PRACTICAL ASPECTS ON CONTROL ALLOCATION FOR A MULTI-ROTOR HELICOPTER
Multi-rotor UAVs Hexacopter Control Allocation Weighted Pseudo-inverse Matrix
2014/5/9
This paper presents practical methods to improve the flight performance of an unmanned multi-rotor helicopter by using an efficient
control allocation strategy. The flying vehicle c...