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浏览/检索结果: 共7条，第1-7条 帮助

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基于闭环霍尔电流传感器驱动电路的设计 期刊论文  OAI收割
控制工程, 2020, 卷号: 27
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  |  收藏  |  浏览/下载：56/0  |  提交时间：2020/10/26
An Improved Electronic Image Motion Compensation (IMC) Method of Aerial Full-Frame-Type Area Array CCD Camera Based on the CCD Multiphase Structure and Hardware Implementation 期刊论文  OAI收割
Sensors, 2018, 卷号: 18, 期号: 8, 页码: 18
作者:  Ren, H.;  Hu, T. T.;  Song, Y. L.;  Sun, H.;  Liu, B. C.
  |  收藏  |  浏览/下载：167/0  |  提交时间：2019/09/17
Multilevel Feature Moving Average Ratio Method for Fault Diagnosis of the Microgrid Inverter Switch 期刊论文  OAI收割
IEEE-CAA JOURNAL OF AUTOMATICA SINICA, 2017, 卷号: 4, 期号: 2, 页码: 177-185
作者:  Huang Zhanjun;  Wang Zhanshan;  Zhang Huaguang
  |  收藏  |  浏览/下载：26/0  |  提交时间：2021/02/02
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：92/0  |  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.  
Drive circuit for spatial light modulator with software preprocessing unit 期刊论文  OAI收割
Analog Integrated Circuits and Signal Processing, 2010, 期号: 2
作者:  Zhang YH (张耀辉)
收藏  |  浏览/下载：22/0  |  提交时间：2010/12/13
The application of auto-controlled liquid crystal light valve arrays to photolithography shutter (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Chen Y.
收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25
Photolithography shutter is usually used to control exposure in order to obtain patterns of code disc and metrology grating which are the core components of optical shaft encoder. But perforated film as photolithography shutter has many disadvantages such as taking too long time to perforate  easily making wrong code  lower reusable ratio. Mathematical models for resist property  luminous efficiency and exposure have been established by deducing their relations for avoiding the disadvantages  which provides the theory of using liquid crystal light valve (LCLV) replacing proforated film. Based on operating principles of LCLV and control theories of photolithography shutter  the principle diagram of control circuit of LCLV arrays has been designed according to theirs control principles. In the control system  LCLV arrays as photolithography shutter are realized by adopting DS75451 to drive them and using AT89C51 chip to control them. By photolithographic experiment  the patterns of code disc are good  the edges of lines are vertical  it indicates LCLV arrays as photolithography shutter may control exposure and light passing accords with the intending requires. It proves using LCLV arrays replacing perforated film as photolithography shutter is feasible completely.  
空间激光通信ATP系统的快速反射镜驱动技术 学位论文  OAI收割
作者:  赵学强
  |  收藏  |  浏览/下载：79/0  |  提交时间：2018/12/26