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• OAI收割 [16]

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• 会议论文 [12]
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• 天文技术与方法 [1]

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浏览/检索结果: 共16条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序发表日期升序发表日期降序题名升序题名降序提交时间升序提交时间降序 Surrogate model-based cognitive digital twin for smart remote maintenance of fusion reactor: modeling and implementation 期刊论文  OAI收割 NUCLEAR FUSION, 2024, 卷号: 64 作者:  Yao, Zhixin;  Wu, Huapeng;  Song, Yuntao;  Cheng, Yong;  Pan, Hongtao   |  收藏  |  浏览/下载：81/0  |  提交时间：2024/11/20 cognitive digital twin  model-based system engineering  surrogate model  error compensation-based precision control  fusion reactor smart maintenance   Post Optical Freeform Compensation Technique for Machining Errors of Large-Aperture Primary Mirror 期刊论文  OAI收割 PHOTONICS, 2023, 卷号: 10, 期号: 7 作者:  Huang, Cheng;  Li, Jinpeng;  Cai, Zhaohan;  Yu, Jiadong;  Xie, Yongjun   |  收藏  |  浏览/下载：35/0  |  提交时间：2023/08/18 large-aperture optical system  low-precision primary mirror  freeform compensation  pose compensation  nodal aberration theory   Real-Time Iterative Compensation Framework for Precision Mechatronic Motion Control Systems 期刊论文  OAI收割 IEEE/CAA Journal of Automatica Sinica, 2022, 卷号: 9, 期号: 7, 页码: 1218-1232 作者:  Chuxiong Hu;  Ran Zhou;  Ze Wang;  Yu Zhu;  Masayoshi Tomizuka   |  收藏  |  浏览/下载：38/0  |  提交时间：2022/06/27 Precision motion control  prediction model  real-time iterative compensation  trajectory tracking   Analysis of the Subdivision Errors of Photoelectric Angle Encoders and Improvement of the Tracking Precision of a Telescope Control System 期刊论文  OAI收割 SENSORS, 2018, 卷号: 18, 期号: 9, 页码: 2998 作者:  Yu, Jiawei;  Wang, Qiang;  Zhou, Guozhong;  He, Dong;  Xia, Yunxia   |  收藏  |  浏览/下载：82/0  |  提交时间：2019/08/23 telescope control systems  photoelectric angle encoders  tracking precision  subdivision errors  amplitude error  real-time compensation   A new manufacturing technology of radio telescope panel 会议论文  OAI收割 SPIE vol.9673, 北京, 2015-5-5 作者:  Pengzhi LI;  Yi CHEN 收藏  |  浏览/下载：55/0  |  提交时间：2016/01/21 radio telescope panel  mold design  foil sticking in a vacuum  metal bonding  precision compensation  stress release   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：62/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.   Imaging control of airborne area CCD mapping camera (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China 作者:  Chen X.;  Chen X.;  Chen X. 收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25 Digital mapping camera is an important tool for modern airborne photogrammetry. Monochromic area CCD which is full frame transfer is selected as image sensor in this paper. Electronic shutter is utilized to eliminate the opening delay of mechanical shutter which will affect the precision of exterior orientation elements acquisition. The equation for calculation displacement of principal point is proposed for TDI forward image motion compensation to compensate principal point shift. Imaging pose control system is designed in order to meet the need for airborne stereo mapping. 2011 IEEE.   The technique of camera scan control based on current loop control (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China 作者:  Liu Z. 收藏  |  浏览/下载：44/0  |  提交时间：2013/03/25 As the crucial structure of aerial camera  sca reflector is always requested with high performance of control precision  stable running and rapid responding. The paper introduces a kind of method about current loop control system which is based on position and velocity dual-closed loop control system. This method improves effectively the performance of velocity closed loop control system and amplifies the gain of low frequency. The results show applying these control methods  the influence of the torque ripple has decrease 50% and the compensation rate precsion has promoted double. 2011 IEEE.   Image motion compensation for a certain aviation camera based on Lucy-Richardson algorithm (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China Zhong C.; Fu J.; Ding Y. 收藏  |  浏览/下载：44/0  |  提交时间：2013/03/25 According to the actual situation  when high quality and high precision are required for the image  both beforehand and afterwards compensation should be used. In this paper  we use Lucy-Richardson algorithm to compensate image motion of a certain aviation camera as an afterwards compensation. Firstly  we analyze the imaging principle of the camera and the reasons that cause image motion. Then we have a brief introduce of the Lucy-Richardson algorithm. At last  in order to show the feasibility of the method  we do some simulation. Through theoretical and practical analysis  experiments and test  we conclude the Lucy-Richardson algorithm can be used to compensate image motion for the certain camera. 2011 IEEE.   High precision test method for dynamic imaging of space camera (EI CONFERENCE) 会议论文  OAI收割 2010 IEEE International Conference on Advanced Computer Control, ICACC 2010, March 27, 2010 - March 29, 2010, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States 作者:  Jin L.-X.;  Zhang K.;  Zhang K.;  Zhang K.;  Zhang K. 收藏  |  浏览/下载：52/0  |  提交时间：2013/03/25 A test method for dynamic imaging of space TDICCD (Time Delay and Integration Charge Coupled Devices) camera was presented in this paper. The test method adopted the PLL (Phase Locked Loop) technology and CMAC (Cerebella Model Articulation Controller) friction compensation as control strategy. Furthermore  According to this method  a test system for dynamic imaging of space TDICCD camera was designed and implemented. The system simulated the movement of the ground objects relative to the space aerocraft  to validate the capability of image speed match and the dynamic imaging quality of TDICCD camera. The design adopted a precision turntable and a drift turntable to simulate the movement around the earth and the drift motion in different latitude due to the rotation of earth  of the aerocraft. The turntables were drived by permanent magnet torque motor which was powered by PWM (Pulse Width Modulation). The system adopted DSP (Digital Signal Processor) as the control core and reached a very high performance. The experimental results showed that the steady speed error was better than 0.01 % and the instantaneous speed error reached 0.0267%. The precision of the test system designed met the requirement for dynamic imaging of TDICCD camera. 2010 IEEE.