Dr. Qiang Wang Profile

Dr. Qiang Wang

at Institute of Optics and Electronics CAS

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Publications (5)

Proceedings Article | 5 September 2017 Paper

A friction compensating method based on data fusion in telescope controller design

Yongmei Huang, Qiang Wang, Dong He, ZhiJun Song, JianWei Zhou, ShengPing Du

Proceedings Volume 10401, 104011F (2017) https://doi.org/10.1117/12.2273260

KEYWORDS: Data fusion, Telescopes, Optical instrument design

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Proceedings Article | 5 September 2017 Presentation + Paper

An acquisition technology of optical ground station in satellite-ground QKD

Dong He, Yong-Mei Huang, Qiang Wang, Bo Qi, Wan-Sheng Liu, Dai-Jun Zhong

Proceedings Volume 10401, 104010Z (2017) https://doi.org/10.1117/12.2272920

KEYWORDS: Satellites, Quantum key distribution, Quantum communications, Quantum optics, Optical instrument design, Telescopes

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Proceedings Article | 24 October 2016 Paper

A method on error analysis for large-aperture optical telescope control system

Yanrui Su, Qiang Wang, Fabao Yan, Xiang Liu, Yongmei Huang

Proceedings Volume 9682, 96820C (2016) https://doi.org/10.1117/12.2241486

KEYWORDS: Error analysis, Space telescopes, Telescopes, Control systems, Computer programming, Optical telescopes, Analytical research, Electronics, Roads, Optics manufacturing

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For large-aperture optical telescope, compared with the performance of azimuth in the control system, arc second-level jitters exist in elevation under different speeds' working mode, especially low-speed working mode in the process of its acquisition, tracking and pointing. The jitters are closely related to the working speed of the elevation, resulting in the reduction of accuracy and low-speed stability of the telescope. By collecting a large number of measured data to the elevation, we do analysis on jitters in the time domain, frequency domain and space domain respectively. And the relation between jitter points and the leading speed of elevation and the corresponding space angle is concluded that the jitters perform as periodic disturbance in space domain and the period of the corresponding space angle of the jitter points is 79.1″ approximately. Then we did simulation, analysis and comparison to the influence of the disturbance sources, like PWM power level output disturbance, torque (acceleration) disturbance, speed feedback disturbance and position feedback disturbance on the elevation to find that the space periodic disturbance still exist in the elevation performance. It leads us to infer that the problems maybe exist in angle measurement unit. The telescope employs a 24-bit photoelectric encoder and we can calculate the encoder grating angular resolution as 79.1016'', which is as the corresponding angle value in the whole encoder system of one period of the subdivision signal. The value is approximately equal to the space frequency of the jitters. Therefore, the working elevation of the telescope is affected by subdivision errors and the period of the subdivision error is identical to the period of encoder grating angular. Through comprehensive consideration and mathematical analysis, that DC subdivision error of subdivision error sources causes the jitters is determined, which is verified in the practical engineering. The method that analyze error sources from time domain, frequency domain and space domain respectively has a very good role in guiding to find disturbance sources for large-aperture optical telescope.

Proceedings Article | 18 September 2014 Paper

FSM model correlation identification method based on invert-repeated m-sequence

Luo-lan Lei, Qiang Wang

Proceedings Volume 9282, 928220 (2014) https://doi.org/10.1117/12.2068036

KEYWORDS: Electro optical modeling, Data modeling, Interference (communication), Clocks, Performance modeling, MATLAB, Signal analyzers, System identification, Electro optics, Electro optical systems

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Proceedings Article | 5 March 2013 Paper

A 19-element segmented MEMS deformable mirror based on electrostatic repulsive-force actuator

Weimin Wang, Fenggang Tao, Qiang Wang, Chuankai Qiu, Zexiang Chen, Jun Yao

Proceedings Volume 8617, 861702 (2013) https://doi.org/10.1117/12.2003017

KEYWORDS: Electrodes, Actuators, Microelectromechanical systems, Mirrors, Surface micromachining, Adaptive optics, Deformable mirrors, Aberration correction, Wavefronts, Optical components

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