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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择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提交时间升序提交时间降序 Design and Experimental Test of a Common-path Coherent-dispersion Spectrometer for Exoplanet Searches 期刊论文 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2020, 卷号: 132, 期号: 1007, 页码: 8 作者:  Wei, Ruyi;  Chen, Shasha;  Hu, Bingliang;  Yan, Qiangqiang;  Wu, Yinhua 收藏  |  浏览/下载：41/0  |  提交时间：2020/05/18 instrumentation: interferometers  instrumentation: spectrographs  methods: data analysis  techniques: radial velocities   Design and Experimental Test of a Common-path Coherent-dispersion Spectrometer for Exoplanet Searches 期刊论文 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2020, 卷号: 132, 期号: 1007 作者:  Wei, Ruyi;  Chen, Shasha;  Hu, Bingliang;  Yan, Qiangqiang;  Wu, Yinhua 收藏  |  浏览/下载：26/0  |  提交时间：2020/05/06 instrumentation: interferometers  instrumentation: spectrographs  methods: data analysis  techniques: radial velocities   A compensation method based on extreme learning machine to enhance absolute position accuracy for aviation drilling robot 期刊论文 ADVANCES IN MECHANICAL ENGINEERING, 2018, 卷号: 10 作者:  Yuan, Peijiang;  Chen, Dongdong;  Wang, Tianmiao;  Cao, Shuangqian;  Cai, Ying 收藏  |  浏览/下载：10/0  |  提交时间：2019/12/30 Robot compensation  absolute positional error  positional error prediction  extreme learning machine  drilling robot   Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文 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 Zhang X.; Yan C. 收藏  |  浏览/下载：18/0  |  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.