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长春光学精密机械与物... [4]
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Performance Evaluation of MPPM-Coded Wireless Optical MIMO System with Combined Effects over Correlated Fading Channel
期刊论文
International Journal of Antennas and Propagation, 2020, 卷号: 2020
作者:
Zhang, Yue
;
Wang, Huiqin
;
Cao, Minghua
;
Bao, Zhongxian
收藏
  |  
浏览/下载:11/0
  |  
提交时间:2020/11/14
Atmospheric turbulence
Bit error rate
Errors
Fading channels
Approximate expressions
Atmospheric attenuation
Correlated fading channels
Ergodic channel capacity
Exponential correlation
Multiple pulse position modulation
Performance degradation
Pointing , acquisition , and tracking
Shipborne Acquisition, Tracking, and Pointing Experimental Verifications towards Satellite-to-Sea Laser Communication
期刊论文
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:11/0
  |  
提交时间:2021/05/06
satellite-to-sea laser communication
acquisition
tracking and pointing
shipborne ATP
pointing error model
A Real-Time Orbit Determination Method for Smooth Transition from Optical Tracking to Laser Ranging of Debris
期刊论文
SENSORS, 2016, 卷号: 16, 期号: 7
作者:
Li, Bin
;
Sang, Jizhang
;
Zhang, Zhongping
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2019/12/05
debris laser tracking
telescope pointing
angular data
orbit determination and prediction
Design and Experiment for Realization of Laser Wireless Power Transmission for Small Unmanned Aerial Vehicles
会议论文
作者:
Chen, Qi
;
Zhang, Dechen
;
Zhu, Dandi
;
Shi, Qianyun
;
Gu, Jian
收藏
  |  
浏览/下载:2/0
  |  
提交时间:2019/12/05
Wireless laser power transmission
Photoelectric conversion
UAV
Charging module
Acquiring
pointing and tracking
Research on satellite platform vibration compensation method based on liquid crystal steering system (EI CONFERENCE)
会议论文
2011 SSITE International Conference on Future Material Research and Industry Application, FMRIA 2011, December 1, 2011 - December 2, 2011, Macau, China
Li X.
;
Han C.
;
Wen M.
;
Zhao Q.
;
Jiang X.
收藏
  |  
浏览/下载:10/0
  |  
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.
Adaptive pyramid mean shift for global real-time visual tracking
期刊论文
IMAGE AND VISION COMPUTING, 2010, 卷号: 28, 期号: 3, 页码: 424-437
作者:
Li, Shu-Xiao
;
Chang, Hong-Xing
;
Zhu, Cheng-Fei
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2015/08/12
Global visual tracking
Fast mean shift
Adaptive level
Kernel-based tracking
Tracking and pointing subsystem
Feed-forward control to stabilize optical axis based on accelerometer (EI CONFERENCE)
会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Wenfeng B.
;
Juan C.
;
Hu W.
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2013/03/25
In the optoelectronic tracking system
the azimuth and elevation system determine the pointing precision of the optical axis. We discuss how to stabilize the optical axis by apply the feed forward control based on the accelerometer output. Both the acceleration and speed are applied to the compound controller. The experimental results show that when the azimuth servo system works at maximum speed 50/s and maximum accelerate 30/s2
the maximum tracking error of the system is 1.08'
with the feed forward compensation
so the precision is increased 6 times compared to that of without compound control. 2010 IEEE.
Gimbal displacement error analysis on an electro-optical seeker (EI CONFERENCE)
会议论文
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
Jiang Z.
;
Zhang X.
;
Ai X.
;
Wei Q.
;
Jia H.
收藏
  |  
浏览/下载:24/0
  |  
提交时间:2013/03/25
It is essential to analyze the gimbal displacement errors for a seeker due to the importance for cueing of targets and tracking for the final approach. Otherwise
for a seeker electro-driven with a concentric glass dome
the large errors will decrease the picking
pointing
and tracking precision rooted from the displacement errors existing between the rotation center of the optical system and the gimbal. And the gimbaled camera system displacement errors are never eliminated but reduced due to the geometric errors consists of geometric tolerances of gimbal structure
manufacture
installation and vibration coming from working environment. In this paper
the gimbal displacement errors in an electro-optically stabilized platform resulting from geometric errors and environment errors were analyzed and shown in detail. The mathematical modal of the gimbal displacement errors created based on multi-body dynamics demonstrated the connection between the gimbal displacement errors and the stabilized platform. Taking a visible light image seeker as a case
the diameter is 120mm
and the geometric tolerances came from the values of primary design and the vibration data came from the environmental vibration test on the pitch-yaw seeker
and at the same time
the errors resulting from installation were considered too. Based on calculating
the maximum gimbal displacement error will reach to 0.2mm for pitching angle smaller than 40 and yawing angle smaller than 60. However
the critical parts have been found out according to the probability theory and the reliability analysis successfully used in the paper
and finally
the maximum gimbal displacement error reduced to 0.1mm
which is acceptable corresponding to the picking
pointing and tracking precision for an optical imaging seeker. 2010 Copyright SPIE - The International Society for Optical Engineering.
Kalman filter for pointing deviation delay compensation in a TV tracker (EI CONFERENCE)
会议论文
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:17/0
  |  
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.
卫星激光通信Ⅰ链路和终端技术
期刊论文
中国激光, 2007, 卷号: 34, 期号: 1, 页码: 3, 20
刘立人
收藏
  |  
浏览/下载:812/164
  |  
提交时间:2009/09/18
星间激光通信
intersatellite laser communications
星地激光通信
satellite-to-ground laser communications
光学瞄准捕获跟踪
optical pointing
非相干光通信
acquisition and tracking (PAT)
零差相干光通信
incoherent optical transmission
coherent optical BPSK homodyne transmission
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