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浏览/检索结果: 共30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发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 A deep learning approach for predicting the antenna pointing error caused by transmission faults with simulation data 期刊论文  OAI收割 SCIENTIFIC REPORTS, 2024, 卷号: 14, 期号: 1, 页码: 23 作者:  Chen, Lihui;  Xue, Song;  Lian, Peiyuan;  Xu, Qian;  Wang, Meng   |  收藏  |  浏览/下载：1/0  |  提交时间：2025/02/27 Large antennas  Transmission faults  Pointing accuracy  Axis error  Intelligent prediction   Auto-Alignment Non-Contact Optical Measurement Method for Quantifying Wobble Error of a Theodolite on a Vehicle-Mounted Platform 期刊论文  OAI收割 Tehnicki Vjesnik, 2024, 卷号: 31, 期号: 2, 页码: 449-459 作者:  Li, Xiangyu;  Hao, Wei;  Xie, Meilin;  Liu, Bo;  Jiang, Bo   |  收藏  |  浏览/下载：16/0  |  提交时间：2024/05/22 autocollimator  dual-axis inclinometer  electro-optical theodolite  optical measurement  vehicle-mounted platform  wobble error   Misalignment Calculation on Off-Axis Telescope System via Fully Connected Neural Network 期刊论文  OAI收割 IEEE Photonics Journal, 2020, 卷号: 12, 期号: 4, 页码: 0600112-1-12 作者:  Liu, Zhu;  Peng, Oi;  Xu, Yangjie;  Ren, Ge;  Ma, Haotong   |  收藏  |  浏览/下载：28/0  |  提交时间：2021/05/11 Off-axis Telescope  Misalignment  Decentering And Tilt Error  Zernike Coefficients  Fully Connected Neural Network   Synchronization control strategy in multi-layer and multi-axis systems based on the combine cross coupling error 期刊论文  OAI收割 ADVANCES IN MECHANICAL ENGINEERING, 2017, 卷号: 9, 期号: 6, 页码: 1-11 作者:  Xu, Jie;  Lu, Huacai;  Liu, Xufeng 收藏  |  浏览/下载：24/0  |  提交时间：2017/12/25 Synchronization Control  Combine-cross-coupling Error  Master-slave Approach  Cross Coupled Control  Multi-layer And Multi-axis  Adjacent Coupling Error   Research on key technical issues of contact method for large diameter off-axis aspheric segments 会议论文  OAI收割 SPIE Vol.9912, Edinburgh, United Kingdom, 2016-6-26 作者:  ZiBo Jiang;  XinNan Li;  YongJun Liang;  Bo Li;  BinBin Yu 收藏  |  浏览/下载：39/0  |  提交时间：2017/01/24 Stressed Mirror Annular Polishing  Off-axis aspherical mirror  Contact detection  Error analysis  Polynomials orthogonality   Analysis and compensation strategy of non-linear error in five-axis CNC machining 会议论文  OAI收割 International Conference on Machine Tool Technology and Mechatronics Engineering, ICMTTME 2014, Guilin, China, June 22-23, 2014 作者:  Liu HJ(刘红军);  Zhang AG(张爱国);  Zhao JB(赵吉宾);  Shang, Jin;  Liu, Jun 收藏  |  浏览/下载：76/0  |  提交时间：2015/12/13 Complex Surface  Five-Axis CNC Machining  Non-Linear Error  Tool Position   Structural design of large aperture rectangular mirror for space telescope (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Civil Engineering and Transportation, ICCET 2012, October 27, 2012 - October 28, 2012, Guilin, China 作者:  Li Z.;  Li Z. 收藏  |  浏览/下载：45/0  |  提交时间：2013/03/25 Structural design of large aperture mirror is one of the key technologies for space telescope development. To meet the requirements of high stiffness  strength and thermal dimensional stability  some factors such as support scheme  materials selection  lightweight design and flexible support design were taken into account. The three supports location of the mirror was determined according to the modal analytical solution. By adjusting the parameters of flexure hinge  influences of gravity  assembly stress and thermal stress on the mirror were reduced obviously. Finite element analysis (FEA) results indicate that the surface accuracy reach to rms10.2nm and 10.8nm under the gravity along optical axis direction and 5C uniform temperature rise respectively  the fundamental frequency of the mirror component is 268Hz. Dynamics test shows that the first order natural frequency is 256Hz  which shows an error less than 5% compared to FEA results. (2013) Trans Tech Publications  Switzerland.   Precision analysis of simulation systems with hardware-in-loop caused by performance of three-Axis virtual flight motion simulator (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Manufacturing Science and Technology, ICMST 2011, September 16, 2011 - September 18, 2011, Singapore, Singapore Wang T.; Zhu M.-C.; Yin S.-L.; Jia H.-G. 收藏  |  浏览/下载：53/0  |  提交时间：2013/03/25 Simulation systems with hardware-in-loop are composed by three-Axis virtual flight motion simulator  simulation computer  load torque simulator  and visual simulation systems. Three-Axis Virtual Flight Motion Simulator are used to simulate the attitude of missile in simulation system with hardware-in-loop  so its performance influenced the result of simulation directly. This paper mainly analyzed the factors which influenced the performance of a three-Axis virtual flight motion simulator which we are used now in the lab  then analyzed the entire simulation system's error caused by these factors through numerical simulation method. By analysis we can see that bandwidth is the main factor influenced the precision of simulation systems with hardware-in-loop  mechanical device installation error and measurement error may also cause some errors of the systems at the same time.   The method of the system error modification of photoelectric theodolite of T type (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China 作者:  Zhao L.;  Zhang Y. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 The system error of photoelectric theodolite includes Visual axis error  This paper ratiocinates the formula of Azimuth orientation error  horizontal axis error  elevation zero error and Visual axis error of Photoelectric theodolite of T type by triangle relation in space. Photoelectric theodolite of U type with main visual axis and auxiliary visual axis shoots images and inverse images of marks to obtain system error data. Error is less than 0.4 second by comparing error data of auxiliary visual axis with error data of main visual axis and the precision of two methods is identical. It has been validated that the method of error measurement of photoelectric theodolite of T type is right. 2012 IEEE.  vertical axis error  Azimuth orientation error  elevation zero error   Design and test of pointing mirror assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China 作者:  Chen W. 收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25 In order to ensure the surface figure of the pointing mirror (460mm long  290mm wide) in spaceborne remote sensing camera  Silicon Carbide was selected as the mirror material. The form of composite triangular and rectangular and the combination of open and closed back was explored in the lightweight design. A new kinematic mount and flexible structure in axis is used to hold the mirror around the lateral surface. The structure can minimize distortions induced by coefficient of thermal expansion mismatch among the materials. This eliminates the bending of the integral mount under the weight of the mirror. Optical performance of the mirror was analyzed under gravity load and temperature load using finite element method. Predicted surface figure error based on the removal of bias  tilt and power was calculated using an in-house Matlab script for mirrors. The pointing mirror assembly was tested using open loop servo control. And the surface figure was checked using interferometer. Surface figure accuracy is better than 1/30 ( 632.8nm  rms). The results show that the kinematic mount induces minimal figure error on the optical surface. 2011 IEEE.