×
验证码:
换一张
忘记密码?
记住我
CORC
首页
科研机构
检索
知识图谱
申请加入
托管服务
登录
注册
在结果中检索
科研机构
北京航空航天大学 [4]
长春光学精密机械与物... [4]
西安交通大学 [2]
内容类型
会议论文 [5]
期刊论文 [5]
发表日期
2019 [3]
2018 [1]
2017 [1]
2011 [1]
2010 [1]
2009 [1]
更多...
×
知识图谱
CORC
开始提交
已提交作品
待认领作品
已认领作品
未提交全文
收藏管理
QQ客服
官方微博
反馈留言
浏览/检索结果:
共10条,第1-10条
帮助
已选(
0
)
清除
条数/页:
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
排序方式:
请选择
发表日期升序
发表日期降序
作者升序
作者降序
提交时间升序
提交时间降序
题名升序
题名降序
Optimized design method of aero-engine rotor structure layout [航空发动机转子结构布局优化设计方法]
期刊论文
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics, 2019, 卷号: 45, 页码: 266-276
作者:
Li, Chao
;
Jin, Fuyi
;
Zhang, Weihao
收藏
  |  
浏览/下载:12/0
  |  
提交时间:2019/12/30
Aircraft engines
Design of experiments
Efficiency
Engines
Turbofan engines
Aero-engine
Configuration designs
Rotor systems
Structural efficiencies
Structure layout
Structural design
Teardrop hovering configuration control strategy based on piecewise constant thrust [基于分段常值推力的水滴悬停构型控制策略]
期刊论文
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics, 2019, 卷号: 45, 页码: 560-566
作者:
Bai, S.
;
Wang, H.
;
Han, C.
;
Zhang, S.
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2019/12/30
Aerospace engineering
Research
Configuration control
Configuration designs
Engineering applications
Formation flying
Least square methods
Least-squares optimization
Spacecraft formation flying
Teardrop hovering
Least squares approximations
Optimum design of rotor structure layout and its mechanical properties [转子结构布局及其力学特性优化设计]
期刊论文
Hangkong Dongli Xuebao/Journal of Aerospace Power, 2019, 卷号: 34, 页码: 282-291
作者:
Li, C.
;
Jin, F.
;
Wang, D.
;
Ma, Y.
;
Hong, J.
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2019/12/30
Efficiency
Engines
Mechanical properties
Numerical methods
Structural design
Aero-engine
Configuration designs
Rotor structures
Structural efficiencies
Structure layout
Aircraft engines
A PBOM configuration and management method based on templates
会议论文
2017 2ND INTERNATIONAL CONFERENCE ON MECHATRONICS AND ELECTRICAL SYSTEMS (ICMES 2017), 2018-01-01
作者:
Guo, Kai
;
Qiao, Lihong
;
Qie, Yifan
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2019/12/30
Condensed matter physics
Engineering
Industrial engineering
Materials science
Bill of materials
Complex products
Configuration and managements
Configuration designs
Configuration process
Detection sensors
Product families
Template based methods
Product design
Microstructure Development for Application of Thermal Sprayed Ceramic Coatings to Manufacturing of Solid Oxide Fuel Cells
期刊论文
Zhongguo Biaomian Gongcheng/China Surface Engineering, 2017, 卷号: 30, 页码: 1-19
作者:
Li, Cheng-Xin
;
Wang, Yue-Peng
;
Zhang, Shan-Lin
;
Yang, Guan-Jun
;
Li, Chang-Jiu
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2019/11/26
Configuration designs
Crystalline structure
Dense coating
Microstructure development
Plasma spraying technology
Plasma-sprayed ceramic coatings
Porous coatings
Triple phase boundary
The rapidly fabrication technique for wind-tunnel models of flight vehicle
期刊论文
Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics, 2011, 卷号: 25, 期号: [db:dc_citation_issue], 页码: 79-84
作者:
Zhu, Wei-Jun
;
Li, Di-Chen
;
Zhang, Zheng-Yu
;
Wang, Wei
;
Sun, Yan
收藏
  |  
浏览/下载:1/0
  |  
提交时间:2019/12/10
Aeroelastic models
Configuration designs
Fabrication technique
Flight vehicles
Resin composites
Structural similarity
Wind tunnel modeling
Wind tunnel models
Analysis of inertia dyadic uncertainty for small agile satellite with control moment gyros (EI CONFERENCE)
会议论文
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
Sun Z.
;
Zhang L.
;
Jin G.
;
Yang X.
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2013/03/25
With the increasing demands for the agility of the next earth imaging satellite
control moment gyro (CMG) is considered to be the most suitable actuator because of its torque amplification capability. However
a CMG system may introduce uncertainty of inertia dyadic to a satellite's attitude control system. The uncertainty is negligible for large space vehicles
but it has not been tested whether it can be ignored for small agile satellites. How to model the CMG system inertia dyadic varying with gimbal angles
and what influence it will put on the performance of attitude control system haven't been test accurately as well. All of them are dealt with mathematically and accurately in this paper. This paper firstly gives mathematic descriptions of the inertia dyadic of the 4-CMG pyramid configuration system
varying with gimbal angles
and then designs a variable structure control law for small agile satellite using CMGs. Finally
numerical simulation suggests that the inertia dyadic variation of a 4-CMG pyramid configuration system is approximately centesimal of the total inertia dyadic of the satellite
and that the designed variable structure control law is of good robust performance for an example of large-angle attitude maneuver
despite of the variation of the inertia dyadic. 2010 IEEE.
A spherical catadioptric telescope system based on Cooke corrector group (EI CONFERENCE)
会议论文
Novel Optical Systems Design and Optimization XII, August 3, 2009 - August 4, 2009, San Diego, CA, United states
Zhang J.
;
Kang Y.
;
Liu W.
收藏
  |  
浏览/下载:27/0
  |  
提交时间:2013/03/25
To obtain a number of advantages in fabrication
testing and alignment
many designs in which spherical mirrors replace classical Cassegrain-form aspheric mirrors are present in the literature. However
spherical mirrors suffer from substantial spherical aberration and thereby require some form of corrector group. But in this case
the question encountered is that of making the basic optical configuration more complex. In this paper
a new design based on Cooke corrector group is presented for eliminating spherical aberration
which is believed to provide higher performance with less complexity than previous approaches. Besides
the cost and fabrication period will be extremely decreased. The telescope system using corrector group here can achieve good optical performance with f# of 10
full field of 0.5
obscuration of 1/3 and MTF (Modulation Transfer Function) of 0.48 corresponding to 50@lp/mm. 2009 Copyright SPIE - The International Society for Optical Engineering.
Optical system design with high resolution and large field of view for the remote sensor (EI CONFERENCE)
会议论文
Chang J.
;
Weng Z.-C.
;
Wang Y.-T.
;
Cheng D.-W.
;
Jiang H.-L.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
In this paper
we are presenting a design method and its results for a space optical system with high resolution and wide field of view. This optical system can be used both in infrared and visible configurations. The designing of this system is based on an on-axis three-mirror anastigmatic (TMA) system. Here the on-axis concept allows wide field of view (FOV) enabling a diversity of designs available for the Multi-Object Spectrometer instruments optimized for low scattered and low emissive light. The available FOVs are upto 1 in both spectrum ranges
whereas the available aperture range is F/15 - F/10. The final optical system is a three-mirror telescope with two on-axis and one off-axis segment and its resolution is 0.3m or even lower. The distinguished feature of this design is that it maintains diffraction-limited image at wide wavelengths. The technological developments in the field of computer generated shaping of large-sized optical surface details with diffraction-limited imagery have opened new avenues towards the designing techniques. Such techniques permit us to expand these technological opportunities to fabricate the aspherical off-axis mirrors for a complex configuration.
Geometrical modulation transfer function of different active pixel of CMOS APS (EI CONFERENCE)
会议论文
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
Li J.
;
Liu J.
;
Hao Z.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
The geometrical Modulation Transfer Function (MTF) of CMOS APS (active pixel sensor) is analyzed in this paper. Advanced APS have been designed and fabricated where different pixel shapes such as square
rectangle and L shape
were placed
because the amplifier circuit and other function circuits inter pixel of APS take up some pixel area. MTF is an important figure of merit in focal plane array imaging sensors. Research on analyzing the MTF for the proper pixel shape is currently in progress for a centroidal configuration of a target position. MTF will give us a more complete understanding of the tradeoffs opposed by the different pixel designs and by the signal processing conditions. Based on image sensor sampling and reconstructing model
the MTF expression of any active pixel shape has been deduced in this paper. According to actual pixel shape
three different active area pixels were analyzed
they were square
rectangle
and L shape
their Fill Factor (FF) is 30%
44% and 55%
respectively. Results of simulation experiments indicate that different pixel geometrical characteristics contribute significantly to the figures of their MTF. Different geometrical shape of active sensitive area of pixel and different station in pixel would influence MTF figures. The analysis results are important in designing better APS pixel and more important in analyzing imaging system performance of APS subpixel precision system.
©版权所有 ©2017 CSpace - Powered by
CSpace