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	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：84/0 \| 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.
	Breaking the Mirror: pH-Controlled Chirality Generation from a meso Ligand to a Racemic Ligand 期刊论文 OAI收割 Chemistry-a European Journal, 2009, 卷号: 15, 期号: 4, 页码: 989-1000 L. Zhang, J. Zhang, Z. J. Li, Y. Y. Qin, Q. P. Lin and Y. G. Yao 收藏 \| 浏览/下载：23/0 \| 提交时间：2012/11/06 configuration determination crystal engineering metal-organic frameworks stereochemistry tetrahydrofurantetracarboxylic acid zinc metal-organic frameworks coordination networks cyclohexanedicarboxylate ligand hydrothermal synthesis structural diversity magnetic-properties rational synthesis crystal-structure simple polyhedra complexes
	Breaking the Mirror: pH-Controlled Chirality Generation from a meso Ligand to a Racemic Ligand 期刊论文 OAI收割 Chemistry-a European Journal, 2009, 卷号: 15, 期号: 4, 页码: 989-1000 L. Zhang, J. Zhang, Z. J. Li, Y. Y. Qin, Q. P. Lin and Y. G. Yao 收藏 \| 浏览/下载：20/0 \| 提交时间：2012/11/06 configuration determination crystal engineering metal-organic frameworks stereochemistry tetrahydrofurantetracarboxylic acid zinc metal-organic frameworks coordination networks cyclohexanedicarboxylate ligand hydrothermal synthesis structural diversity magnetic-properties rational synthesis crystal-structure simple polyhedra complexes
	Design of high-resolution fourier transform lens (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Zhang L.; Zhang L. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 With the development of optical information processing high-resolution Fourier transform lens has often been used in holographic data storage system spatial filtering and observation of particles. This paper studies the optical design method of high-resolution Fourier transform optical lenses system which could be used in particles observation and holographic data storage system. According to Fourier transform relation between object and its frequency plane and the theory of geometrical optics the system with working wavelength 532nm and resolution 3 m was designed based on ZEMAX. A multi-configuration method was adopted to optimize the system's lenses. In the optical system a diaphragm was placed at the system's spectrum plane and the system demanded a low vacuum to cut down the influences of atmosphere and other particles. The result of finite element analysis indicated that the influences of vacuum pumping to optics spacing and mirror surface shape very minor and the imaging quality not being affected. This system has many advantages such as simple structure good image quality and a high resolution of 3 m. So it has a wide application prospect and can be used both in holographic data storage system and particles observation.