中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共4条，第1-4条

帮助

条数/页：排序方式：
	Ground semi-physical simulation experiment study of one-dimensional drag-free control 期刊论文 OAI收割 INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2021, 卷号: 36, 期号: 11N12, 页码: 24 作者: Zhang C(章楚); He JW(贺建武); Chen MW(陈明伟); Duan L(段俐); Kang Q(康琦) \| 收藏 \| 浏览/下载：42/0 \| 提交时间：2021/06/21 Drag-free control acceleration equivalence suspended rotational pendulum displacement mode
	可压缩流体体积黏性的连续介质理论期刊论文 OAI收割中国科学. 物理学, 力学, 天文学, 2016, 卷号: 46, 期号: 3 作者: 李馨东; 胡宗民; 姜宗林收藏 \| 浏览/下载：137/0 \| 提交时间：2016/12/16 compressible fluids Stokes assumption bulk viscosity relaxation time rotational mode vibrational mode
	Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China 作者: Zhang X.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio high precision compact structure high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera the location relationship between the displacement of focusing structure and the focal plane movement is derived and the system error is analyzed its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70 repeated positional accuracy is 2m which meet the requirements for use. 2010 SPIE.
	Study on bandwidth mutual-benefit between the azimuth and pitch in an optoelectronic tracking system (EI CONFERENCE) 会议论文 OAI收割 MEMS/MOEMS Technologies and Applications III, November 12, 2007 - November 14, 2007, Beijing, China 作者: Guo J.; Guo J.; Chen J. 收藏 \| 浏览/下载：16/0 \| 提交时间：2013/03/25 Two-axis optoelectronic tracking equipments generally use such mode that azimuth and pitch system are independently controlled. It leads to the two structures completely uncoupled therefore and reduces the state space dimension. But the main problem is that the rotational inertia of azimuth is much larger than that of pitch it is an effective control mode to the two-axis photoelectric tracking equipments. which leads its dynamic tracking performance is worse. So to find a more suitable mechanics and more effective control strategy is necessary. Considering the tracking ability this paper designs BMC (bandwidth mutual compensation) to uniformly correct the error of both the azimuth and pitch system in real time it is realized by cross coupling control to the azimuth and pitch. The simulation result verified that compared with classical uncoupling system BMS not only guarantees the state space dimension but improves systematic tracking performance about 2