中国科学院机构知识库网格系统: 检索

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	Modified active disturbance rejection control scheme with sliding mode compensation for airborne star tracker driven by Permanent Magnet Synchronous Motor 期刊论文 OAI收割 Control Engineering Practice, 2022, 卷号: 127 作者: Wang, Fan; Cheng, Tianji; Zhu, Hua; Liu, Zhiwen; Han, Chongyang \| 收藏 \| 浏览/下载：62/0 \| 提交时间：2022/08/31 Star tracker Active disturbance rejection control (ADRC) Robustness Modified extended state observer (MESO) Input to state stability (ISS) Sliding mode (SM) control
	A star identification algorithm based on radial and dynamic cyclic features of star pattern 期刊论文 OAI收割 ADVANCES IN SPACE RESEARCH, 2019, 卷号: 63, 期号: 7, 页码: 2245-2259 作者: Wei, Xin; Wen, Desheng; Song, Zongxi; Xi, Jiangbo; Zhang, Weikang \| 收藏 \| 浏览/下载：107/0 \| 提交时间：2019/04/29 Star identification Star sensor Star tracker Dynamic cyclic pattern Chain part extension Attitude determination
	Restoration Method of a Blurred Star Image for a Star Sensor Under Dynamic Conditions 期刊论文 OAI收割 Sensors, 2019, 卷号: 19, 期号: 19, 页码: 18 作者: Z.Y.Mu; J.Wang; X.He; Z.H.Wei; J.W.He \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2020/08/24 star sensor,motion blur,curvature filter,image restoration,tracker,Chemistry,Engineering,Instruments & Instrumentation
	Alignment calibration and performance study of the STAR PXL detector 期刊论文 OAI收割 NUCLEAR SCIENCE AND TECHNIQUES, 2017, 卷号: 28, 期号: 2, 页码: - 作者: Ma, L; Dong, X; Qiu, H; Margetis, S; Ma, YG \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2017/12/08 Alignment Calibration Heavy Flavor Tracker Star
	High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite 期刊论文 OAI收割 REMOTE SENSING, 2015, 卷号: 7, 期号: 1, 页码: 195-210 作者: Tang, Xinming; Xie, Junfeng; Wang, Xiao; Jiang, Wanshou 收藏 \| 浏览/下载：75/0 \| 提交时间：2016/04/20 attitude accuracy star tracker/gyro post-processing geometric accuracy
	Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE) 会议论文 OAI收割 Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China Lu D.; Guang J.; Shaoju W.; Tao C. 收藏 \| 浏览/下载：34/0 \| 提交时间：2013/03/25 The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages such as small FOV high power consumption low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.
	Study on the detection sensitivity of APS star tracker (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Li J.; Li J.; Li J.; Liu J.; Liu J. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 Detection sensitivity is an important parameter of star tracker which can express detection limit of the weakest detected visual star magnitude. Detection sensitivity of APS star tracker is related to APS parameters optical system aperture and lens permeance rate SNR and so on. This paper the expressions of APS star detected signal and APS noise are given so signal-noise ratio (SNR) of star tracker can be obtained. And based on the theory inspecting signal from noise and optimal SNR threshold detection principle the detection sensitivity model can be obtained. The corresponding APS star tracker detection limit is obtain based on APS IBIS5 and general optical system parameter design. When SNR threshold is 8.1 which can obtain 99.9% detection probability we can calculate that the detection sensitivity is 6.5 visual magnitude.
	Active pixel sensor geometrical characteristic effects on star image subdivided locating accuracy for star tracker (EI CONFERENCE) 会议论文 OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China 作者: Liu J.; Liu J.; Liu J.; Li J.; Li J. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 Active pixel sensor (APS) star tracker becomes an investigated hotspot because of its technical advantages. And centroid algorithm is a subpixel method proper to star position calculation because of its high accuracy and simplicity. When centroid algorithm is applied on APS star tracker APS pixel geometrical characteristics might effect on star image position accuracy. Because the amplifier circuit and other function circuits inter pixel of APS take up some pixel area the Fill Factor is less than 100%. Moreover the active sensitive area has a certain geometrical shape such as square rectangle and L shape. The Fill Factor of pixel influences on star image subdivided locating accuracy when using centioid algorithm. In this paper we have analyzed all pixel geometrical characteristics influence on the star position accuracy. From simulation experiments we can conclude that Fill factor and pixel geometric shape influence on star position accuracy. The star locating error increased when Fill Factor decreased and different geometrical shape of active sensitive area of pixel can make different influence on star location accuracy the symmetrical sensitive area in x or y axis have symmetrical location error in the same axis.
	CMOS APS imaging system application in star tracker (EI CONFERENCE) 会议论文 OAI收割 Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China 作者: Li J.; Liu Y.; Liu Y.; Liu Y.; Liu J. 收藏 \| 浏览/下载：58/0 \| 提交时间：2013/03/25 Small satellites are capable of performing space explore missions that require accurate attitude determination and control. However low weight size power and cost requirements limit the types of attitude sensor of small craft such as CCD are not practical for small satellites. CMOS APS is a good substitute for attitude sensors of small craft. Some of the technical advantages of CMOS APS are no blooming single power low power consumption small size and little support circuitry direct digital output simple to system design in particular radiation-hard characteristic compare with CCD. This paper discusses the application probability of CMOS APS in star tracker for small satellites further more a prototype ground-based star camera based on STAR250 CMOS image sensor has been built. In order to extract stars positions coordinates subpixel accuracy centroiding algorithm has been developed and tested on some ground-based images. Moreover the camera system star sensitivity and noise model are analyzed and the system accuracy is been evaluated. Experimental results indicate that a star camera based on CMOS APS is a viable practical attitude sensor appropriate for space small satellites.