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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
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
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
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 radio telescope
Construction survey technology on concrete construction of Three Gorges Project ship lift tower
Luo Chen,Yan Chunbo
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 97-101
Keywords： construction survey zenith telescope cast point electromagnetic distance measuring spatial positioning
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
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
Task-space position/attitude tracking control of FAST fine tuning system
QI Lin, ZHANG Hui, DUAN Guanghong
Journal Article
Construction survey technology on concrete construction of Three Gorges Project ship lift tower
Luo Chen,Yan Chunbo
Journal Article
JAMES WEBB Space Telescope
14 Dec 2022
Conference Videos
JAMES WEBB Space Telescope(English)
20 Dec 2022
Conference Videos
Five-Hundred-Meter Aperture Spherical Radio Telescope (Chinese)
7 Dec 2022
Conference Videos
Five-Hundred-Meter Aperture Spherical Radio Telescope (English)
10 Dec 2022
Conference Videos
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