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长春光学精密机械与物... [3]
清华大学 [1]
山东大学 [1]
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会议论文 [3]
期刊论文 [2]
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2019 [1]
2010 [2]
2009 [1]
2007 [1]
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Influence of Rotor-Bearing Coupling Vibration on Dynamic Behavior of Electric Vehicle Driven by In-Wheel Motor
期刊论文
IEEE ACCESS, 2019, 卷号: 7, 页码: 63540-63549
作者:
Yu, Yuewei
;
Zhao, Leilei
;
Zhou, Changcheng
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提交时间:2019/12/11
Electric vehicle
driven by in-wheel motor
rotor-bearing coupling
vibration
motor exciting force
bearing nonlinear force
dynamic
analysis
电动汽车电动液压式动力转向系统的控制
期刊论文
2010, 2010
黄勇
;
陈全世
;
仇斌
;
陈伏虎
;
HUANG Yong
;
CHEN Quan-shi
;
QIU Bin
;
CHEN Fu-hu
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浏览/下载:1/0
Inspection focus technology of space tridimensional mapping camera based on astigmatic method (EI CONFERENCE)
会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
Wang Z.
;
Zhang L.
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浏览/下载:20/0
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提交时间:2013/03/25
The CCD plane of the space tridimensional mapping camera will be deviated from the focal plane(including the CCD plane deviated due to camera focal length changed)
under the condition of space environment and vibration
impact when satellite is launching
image resolution ratio will be descended because defocusing. For tridimensional mapping camera
principal point position and focal length variation of the camera affect positioning accuracy of ground target
conventional solution is under the condition of vacuum and focusing range
calibrate the position of CCD plane with code of photoelectric encoder
when the camera defocusing in orbit
the magnitude and direction of defocusing amount are obtained by photoelectric encoder
then the focusing mechanism driven by step motor to compensate defocusing amount of the CCD plane. For tridimensional mapping camera
under the condition of space environment and vibration
impact when satellite is launching
if the camera focal length changes
above focusing method has been meaningless. Thus
the measuring and focusing method was put forward based on astigmation
a quadrant detector was adopted to measure the astigmation caused by the deviation of the CCD plane
refer to calibrated relation between the CCD plane poison and the asrigmation
the deviation vector of the CCD plane can be obtained. This method includes all factors caused deviation of the CCD plane
experimental results show that the focusing resolution of mapping camera focusing mechanism based on astigmatic method can reach 0.25 m. 2010 Copyright SPIE - The International Society for Optical Engineering.
Disc varifocal mechanism to improve efficiency of scene matching navigation system (EI CONFERENCE)
会议论文
2009 2nd International Conference on Future Information Technology and Management Engineering, FITME 2009, December 13, 2009 - December 14, 2009, Sanya, China
Leng X.-F.
;
Meng Y.
;
Wang S.-Y.
;
Zhang C.-L.
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浏览/下载:13/0
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提交时间:2013/03/25
In order to meet special requests of optical imaging sensor in scene matching navigation system
a disc varifocal mechanism is proposed for the flight vehicles of long flying time and range. Within small space occupied
it can obtain real images with various resolutions. Moreover
using plate traveling-wave Ultrasonic Motor as its driven motor can reduce energy loss
improve control precision and ensure image obtaining being real-time and stable. Disc varifocal mechanism driven by plate traveling-wave Ultrasonic Motor is high-response
and variation in load doesn't affect its performance parameter. Therefore
applying disc varifocal mechanism in scene matching navigation system
combing software and hardware
can obviously improve the accuracy
real-time and robust of scene matching navigation system. The experiment showed that when the weight of mechanism was 1.5kg
the shortest starting was 0.6ms
and the shortest shutoff was 0.5ms. 2009 IEEE.
Study on the Driving Scheme of a 4-m Alt-azimuth Telescope (EI CONFERENCE)
会议论文
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Wang H.
;
Zhang J.
;
Chen J.
;
Zhao Y.
;
Dai S.
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浏览/下载:13/0
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提交时间:2013/03/25
By summarizing the corresponding parameters Of the driving system of a 4-m Alt-azimuth telescope
some unit techniques like the driving modes and structure
angular position measurement methods in detail
have been analyzed in the paper. A set of primary schemes for astronomical applications
including the altitude axes being driven by 2 DC torque motors
the azimuth by 4 DC torque motors using helical gears
and two pieces of the 27-bit segment tape encoders for each set of axes is proposed. To meet practical engineering needs
the shafting motion parameters are designed and motor elementary parameters are primarily calculated to offer the important references for further study on system driving model and prototype development.
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