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浏览/检索结果: 共31条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序作者升序作者降序题名升序题名降序发表日期升序发表日期降序 Tracking control Scheme for photoelectric tracking platform with predictor-structure ESO 会议论文  OAI收割 Virtual, Chongqing, China, 2021-07-09 作者:  Wang, Fan;  Wang, Ranjun;  Xie, Meilin;  Liu, Peng;  Jing, Feng   |  收藏  |  浏览/下载：38/0  |  提交时间：2022/02/10 photoelectric tracking platform (PTP)  active disturbance rejection control (ADRC)  input-delay system  predictor-structure extended state observer (PESO)   Analysis and design of ground-based photoelectric detection system for star observation during the daytime 会议论文  OAI收割 Beijing, China, 2019-07-07 作者:  Yu, Yue;  Tian, Yan;  Hao, Wei;  Li, Zhe   |  收藏  |  浏览/下载：25/0  |  提交时间：2020/03/04 Star Detection  Photoelectric System  Spectral Filtering  Threshold   Stray light analysis of solar photoelectric detection system on space target (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Intelligent System and Applied Material, GSAM 2012, January 13, 2012 - January 15, 2012, Taiyuan, Shanxi, China Li L.-Y.; Wang Y.-F.; San X.-G. 收藏  |  浏览/下载：155/0  |  提交时间：2013/03/25 Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation  build up evaluation index of stray light system  to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created  and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle  baffle vane and the coating technology. In order to verify the prosperity of structure that designed  we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile  the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually  and so measurement precision was improved from detection graphics. (2012) Trans Tech Publications.   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：30/0  |  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   A signal process system for photoelectric encoder based on C8051F021 MCU (EI CONFERENCE) 会议论文  OAI收割 2nd World Congress on Computer Science and Information Engineering, CSIE 2011, June 17, 2011 - June 19, 2011, Changchun, China 作者:  Gao X. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 In order to minimize the size of photoelectric encoder  a signal process system was designed and C8051F021 MCU was its core device. To begin with  the processing electrocircuit and the data processing software used for the 16-bit encoder was developed. Then the feasibility of this system was verified by experiment. The experimental result proves that the signal process system was simple in structure and reliable. The size of the electrocircuit was 40mm.The precision of the 16-bit photoelectric encoder is 22.4". 2012 Springer-Verlag Berlin Heidelberg.   Study of horizontal shafting with spherical four-way structure (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:  Yang L.;  Yang L. 收藏  |  浏览/下载：44/0  |  提交时间：2013/03/25 Altazimuth photoelectric theodolite level shaft U-type and T-type structure  but with the expanding field of applications of photoelectric theodolite  the horizontal shaft structure occur great changes. For example  in the marine environment  shipboard conditions  the instrument has a waterproof  corrosion-resistant  easy maintenance and other functions  while carrier-based optoelectronic devices from a single visible television configure the development of integrated infrared system and ranging system as one of the single-station measurement system  due to the spherical structure has sufficient internal space exactly adapted to this need. In this paper  the horizontal axis of a spherical four-way structure. From aspects of the spherical four-way split in the form and shafting design and finite element analysis of the detailed design. A spherical four-way horizontal axis system  diameter 550mm  weight 19kg sphere  in the 40kg load  the maximum deformation of 3.3m  fully meet the requirements. The shaft of the structure of the shaking is less than 2 arc seconds  the vibration test  the re-examination instrument accuracy change is less than 1 arc seconds. Verify that the structure is stable and reliable. 2012 IEEE.   Using NOC technology to improve Photoelectric Encoder system for LAMOST spectroscopes 会议论文  OAI收割 Xiamen,China, 2011-10-25 作者:  Zhongwen Hu;  Jianing Wang;  Zhongyi Han;  Yizhong Zeng 收藏  |  浏览/下载：71/0  |  提交时间：2014/01/08 NOC technology  Photoelectric Encoder system  spectroscopes  LAMOST   Design of motion adjusting system for space camera based on ultrasonic motor (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China 作者:  Sun Z. 收藏  |  浏览/下载：103/0  |  提交时间：2013/03/25 Drift angle is a transverse intersection angle of vector of image motion of the space camera. Adjusting the angle could reduce the influence on image quality. Ultrasonic motor (USM) is a new type of actuator using ultrasonic wave stimulated by piezoelectric ceramics. They have many advantages in comparison with conventional electromagnetic motors. In this paper  some improvement was designed for control system of drift adjusting mechanism. Based on ultrasonic motor T-60 was designed the drift adjusting system  which is composed of the drift adjusting mechanical frame  the ultrasonic motor  the driver of Ultrasonic Motor  the photoelectric encoder and the drift adjusting controller. The TMS320F28335 DSP was adopted as the calculation and control processor  photoelectric encoder was used as sensor of position closed loop system and the voltage driving circuit designed as generator of ultrasonic wave. It was built the mathematic model of drive circuit of the ultrasonic motor T-60 using matlab modules. In order to verify the validity of the drift adjusting system  was introduced the source of the disturbance  and made simulation analysis. It designed the control systems of motor drive for drift adjusting system with the improved PID control. The drift angle adjusting system has such advantages as the small space  simple configuration  high position control precision  fine repeatability  self locking property and low powers. It showed that the system could accomplish the mission of drift angle adjusting excellent. 2011 SPIE.   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：58/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.   A vertex tracking technique based on airborne opticalequipment (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China Li Q. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 After analyzing the advantages and disadvantages of photoelectric tracking system withhorizontal gimbal and X-Y double-axis gimbal  a vertex tracking method based on airborne photoelectricequipmenthas been presented. The method  which combines advantages of horizontal gimbal and X-Y double-axis gimbal  can effectively track target in the blind area. experiments show that the tracking method is simple  tracking accuracy is 3  meet the technical requirements. 2011 IEEE.