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浏览/检索结果: 共10条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 国家授时中心vlbi网13m射电望远镜指向修正 期刊论文  OAI收割 时间频率学报, 2020, 卷号: 43, 期号: 1, 页码: 41 作者:  吴文雅;  马浪明;  姚当;  刘佳;  吴元伟   |  收藏  |  浏览/下载：15/0  |  提交时间：2020/08/31 very long baseline interferometry (VLBI) network  radio telescope  pointing model  least square method  VLBI网  射电望远镜  天线修正模型  最小二乘法   Shipborne Acquisition, Tracking, and Pointing Experimental Verifications towards Satellite-to-Sea Laser Communication 期刊论文  OAI收割 APPLIED SCIENCES-BASEL, 2019, 卷号: 9, 期号: 18 作者:  He, Dong;  Wang, Qiang;  Liu, Xiang;  Song, Zhijun;  Zhou, Jianwei   |  收藏  |  浏览/下载：37/0  |  提交时间：2021/05/06 satellite-to-sea laser communication  acquisition  tracking and pointing  shipborne ATP  pointing error model   Using Allan Variance Based Semi-Parameter Model to Calibrate Pointing Errors of Alt-az Telescopes 期刊论文  OAI收割 APPLIED SCIENCES-BASEL, 2018, 卷号: 8, 期号: 4, 页码: 614 作者:  Lingjie Yan;  Yongmei Huang;  Yahui Zhang   |  收藏  |  浏览/下载：34/0  |  提交时间：2019/08/23 alt-az telescopes  LOS  pointing errors  nonlinear error  mount model  Allan variance  Allan variance based semi-parameter model   Laser Beam Pointing Control With Piezoelectric Actuator Model Learning 期刊论文  OAI收割 IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS: SYSTEMS, 2017, 期号: 1, 页码: 1-11 作者:  Fangbo Qin;  Zhang Dapeng(张大朋);  Dengpeng Xing;  De Xu;  Jianquan Li   |  收藏  |  浏览/下载：63/0  |  提交时间：2018/10/08 Laser Beam Pointing Control  Model Learning  Piezoelectric Actuator (PEA)  Support Vector Machines (SVMs)   Research on satellite platform vibration compensation method based on liquid crystal steering system (EI CONFERENCE) 会议论文  OAI收割 2011 SSITE International Conference on Future Material Research and Industry Application, FMRIA 2011, December 1, 2011 - December 2, 2011, Macau, China 作者:  Wen M. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 This paper presents the disturbance compensation scheme based on liquid crystal steering system according to the problem that satellite platform vibration affects the tracking and pointing accuracy in space optical communication. The mathematical model of liquid crystal steering system is built. For improving convergence speed  the adaptive controller based on posteriori estimation errors RLS lattice filter is designed  which not only achieves fast adaptation  but also reaches optimal steady-state disturbance compensation. Finally  the simulation results show that this control scheme is valid and feasible. (2012) Trans Tech Publications  Switzerland.   A 3-axis simulator for spacecraft attitude control research (EI CONFERENCE) 会议论文  OAI收割 2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China 作者:  Dai L. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 This article presents the details of a new 3-axis simulator for spacecraft attitude control research and simulation. The air bearing allows the test bed to rotate about three axes with tiny friction. The attitude determination system consists of three fibre optical gyros  an inclinometer and a magnetometer. The actuator of the system consists of three reaction flywheels and four control moment gyros (CMG). Mathematical models of the sensors and actuators are given to help algorithm design. An extended Kalman filter was designed to provide attitude information for controller. Mathematical simulation results prove the attitude determination system can achieve high precision. A coulomb friction model of reaction wheels is given with experimental results. A friction compensation algorithm was developed to raise the pointing accuracy of the control system. The article also describes the details of the hardware structure. A PD stabilizing controller is implemented to test the validation of the whole control system at last. 2010 IEEE.   Kalman filter for pointing deviation delay compensation in a TV tracker (EI CONFERENCE) 会议论文  OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Juan C.; Wang Q.-P.; Jian C. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 Considering the pointing deviation delay in the TV tracker  which heavily worsens the tracking precision  here we offer an improved Kalman filter algorithm to compensate the delay. The output speed from the filter is fed forward to the speed loop for the compound control to increase the speed constant. The simulation results based on the experiment data show that the method can effectively estimate the position  consequently the speed and accelerate and the tracking precision is improved. The estimation precision of the speed and accelerate depend on that if the state model is coherent with the movement of the real target. 2010 IEEE.   Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE) 会议论文  OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China 作者:  Wu X.-X. 收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25 In order to ascertain the effects of main errors of alt-alt photoelectric telescope on measurement accuracy  orientation error is analyzed.For analyzing optical  mechanical and electrical errors from measured target to telescope picture  we construct 7 coordinates such as:the earth's core coordinate  alt-alt coordinate  etc.  carry through 21 times coordinate transformation  form measuring equation with 26 variables. and we utilize Monte Carlo method to calculate the orientation error  analyze the effects of errors upon pointing. The result indicates that the measuring error standard deviation of alt-alt telescope is minimum value about 10? at the zenith zone. and the deviation increases with the rotation angles of longitude and latitude axes. The model and the method not only can analyze and synthesize the main errors  but also provide a reference to the whole design. 2009 SPIE.   Pointing model for LAMOST experiment set 会议论文  OAI收割 Orlando, FL, 2006-5-24 作者:  Hai Wang;  Yuanxing Zhao 收藏  |  浏览/下载：18/0  |  提交时间：2013/12/28 Pointing model  telescope  LAMOST   The basic parameters of static pointing model of telescope 期刊论文  OAI收割 CHINESE ASTRONOMY AND ASTROPHYSICS, 2001, 卷号: 25, 期号: 4, 页码: 499-505 作者:  Zhang, XX;  Wu, LD 收藏  |  浏览/下载：21/0  |  提交时间：2013/01/31 telescope  static pointing model  basic parameters