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Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope
Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA
Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3, Pages 252-260 doi: 10.1007/s11465-013-0249-7
The pose accuracy of a parallel robot is a function of the mobile platform posture. Thus, there is no a single value of the robot’s accuracy. In this paper, two novel methods for estimating the accuracy of parallel robots are presented. In the first method, the pose accuracy estimation is calculated by considering the propagation of each error, i.e., error variations are considered as a function of the actuator’s stroke. In the second method, it is considered that each actuator has a constant error at any stroke. Both methods can predict pose accuracy of precise robots at design stages, and/or can reduce calibration time of existing robots. An example of a six degree-of-freedom parallel manipulator is included to show the application of the proposed methods.
Keywords： pose errors error estimation parallel robot radio telescopes
Chinese space exploration and scientific motivation
Wu Ji
Strategic Study of CAE 2008, Volume 10, Issue 6, Pages 23-27
After a brief review of the exploration history of the human beings with emphasizing on the Chinese contributions, analysis is given on the motivation of the exploration activities. The scientific motivation is given particular attention. The general description and scientific objectives of four Chinese space exploration programs are given.
Keywords： project Kuafu project magnetosphere-ionishper-thermosphere exploration project solar polar orbit radiotelescope
Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2, Pages 300-306 doi: 10.1631/FITEE.1700056
A radio-over-fiber (RoF) distributed antenna system (DAS) architecture is proposed, where millimeterwave (mm-wave) signals are transmitted to four different radio access units (RAUs) arranged in a ringThe radio frequency (RF) signals are transmitted by polarization multiplexing a multi-wavelength source
Keywords： Radio over fiber Millimeter wave Radio access units
With Great Expectations, Webb Telescope Finally Lifts Off
Mitch Leslie
Engineering 2022, Volume 11, Issue 4, Pages 3-5 doi: 10.1016/j.eng.2022.02.002
Situ Mengtian
Strategic Study of CAE 2001, Volume 3, Issue 7, Pages 64-69
Two difficult tedhnical problems in underground radio communications, i.e. weak signal reception and
Keywords： underground radio communications weak signal reception counter lightning interference
FM Radio Based Non-cooperative Bistatic Radar Experimental System
Wang Yan
Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 39-42
An experimental FM radio based non-cooperative bistatic radar is briefly
Keywords： FM radio non-cooperative bistatic radar LOS signal equalization DBF
Task-space position/attitude tracking control of FAST fine tuning system
QI Lin, ZHANG Hui, DUAN Guanghong
Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4, Pages 392-399 doi: 10.1007/s11465-008-0056-8
Keywords： telescope five-hundred end-effector controller simulation
Webb Space Telescope Hits Its Stride, Dazzling Astronomers
Mitch Leslie
Engineering 2023, Volume 22, Issue 3, Pages 3-6 doi: 10.1016/j.eng.2023.01.003
Modeling of heat and mass transfer for timber during radio-frequency and convective drying
Jia Xiaoran,Zhao Jingyao and Cai Yingchun
Strategic Study of CAE 2014, Volume 16, Issue 4, Pages 106-112
Keywords： timber radio- frequency- convective drying mathematical model difference equation
Study on Several Radio Propagation Models in ITU - R Recommendations
Zhang Minggao
Strategic Study of CAE 2000, Volume 2, Issue 7, Pages 74-78
Studies are presented on five radio propagation models in ITU - R recommendations.
Keywords： radio propagation tropospheric scatter sea reflection ionospheric scintillation attenuation by atmospheric
Xiong-bin PENG, Guo-fang GONG, Hua-yong YANG, Hai-yang LOU, Wei-qiang WU, Tong LIU
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10, Pages 1624-1634 doi: 10.1631/FITEE.1601104
Keywords： Large-scale reflecting telescope Quantitative feedback theory Electro-hydraulic position control system
Qiao-mu JIANG, Hui-fang CHEN, Lei XIE, Kuang WANG
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10, Pages 1665-1676 doi: 10.1631/FITEE.1700203
Keywords： Cognitive radio network Primary user emulation attack Subspace-based blind channel estimation Channel
Features of seismic hazard in large dam projects and strong motion monitoring of large dams
Martin WIELAND,
Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 56-64 doi: 10.1007/s11709-010-0005-6
Keywords： seismic hazard arch dam concrete face rockfill dam strong motion instrumentation reservoir-triggered seismicity Wenchuan earthquake
Application of RFID in the Visual Logistics System
Wang Aiming,Mu Xiaoxi,Li Aihua
Strategic Study of CAE 2006, Volume 8, Issue 8, Pages 65-68
The radio frequency identification (RFID) is a kind of new automatic identification technology.principle, and brings about an application of RFID in visual logistics system, which is realized by the radio
Keywords： visual logistics radio frequency identification visual system for the carrying materials
Physical layer security of underlay cognitive radio using maximal ratio combining Article
Hui ZHAO,Dan-yang WANG,Chao-qing TANG,Ya-ping LIU,Gao-feng PAN,Ting-ting LI,Yun-fei CHEN
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9, Pages 929-937 doi: 10.1631/FITEE.1500351
Keywords： Cognitive radio networks Maximal ratio combining Secrecy outage probability Single-input multiple-output
Title Author Date Type Operation
Kinematic calibration of precise 6-DOF stewart platform-type positioning systems for radio telescope
Juan Carlos JáUREGUI, Eusebio E. HERNáNDEZ, Marco CECCARELLI, Carlos LóPEZ-CAJúN, Alejandro GARCíA
Journal Article
Polarizationmultiplexing based duplex radio-over-fiber link for millimeterwave signal transmission toa ring of multiple radio access units
Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR
Journal Article
The Technical Scheme and Key Equipment for Solving the Difficult Technical Problems of Underground Radio
Situ Mengtian
Journal Article
Task-space position/attitude tracking control of FAST fine tuning system
QI Lin, ZHANG Hui, DUAN Guanghong
Journal Article
Modeling of heat and mass transfer for timber during radio-frequency and convective drying
Jia Xiaoran,Zhao Jingyao and Cai Yingchun
Journal Article
Quantitative feedback controller design and test for an electro-hydraulic position control system in a large-scalereflecting telescope
Xiong-bin PENG, Guo-fang GONG, Hua-yong YANG, Hai-yang LOU, Wei-qiang WU, Tong LIU
Journal Article
On detecting primary user emulation attack using channel impulse response in the cognitive radio network
Qiao-mu JIANG, Hui-fang CHEN, Lei XIE, Kuang WANG
Journal Article
Features of seismic hazard in large dam projects and strong motion monitoring of large dams
Martin WIELAND,
Journal Article
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