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浏览/检索结果: 共3条，第1-3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 Study of fuzzy PID controller for velocity circuit of optical-electronic theodolite 会议论文 2nd international conference on photonics and optical engineering, xi'an, china, 2016-10-14 作者:  Li, Gengxin;  Yang, Xiaojun;  He, Saixian 收藏  |  浏览/下载：18/0  |  提交时间：2017/05/15 Disc varifocal mechanism to improve efficiency of scene matching navigation system (EI CONFERENCE) 会议论文 2009 2nd International Conference on Future Information Technology and Management Engineering, FITME 2009, December 13, 2009 - December 14, 2009, Sanya, China Leng X.-F.; Meng Y.; Wang S.-Y.; Zhang C.-L. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 In order to meet special requests of optical imaging sensor in scene matching navigation system  a disc varifocal mechanism is proposed for the flight vehicles of long flying time and range. Within small space occupied  it can obtain real images with various resolutions. Moreover  using plate traveling-wave Ultrasonic Motor as its driven motor can reduce energy loss  improve control precision and ensure image obtaining being real-time and stable. Disc varifocal mechanism driven by plate traveling-wave Ultrasonic Motor is high-response  and variation in load doesn't affect its performance parameter. Therefore  applying disc varifocal mechanism in scene matching navigation system  combing software and hardware  can obviously improve the accuracy  real-time and robust of scene matching navigation system. The experiment showed that when the weight of mechanism was 1.5kg  the shortest starting was 0.6ms  and the shortest shutoff was 0.5ms. 2009 IEEE.   Increased interfacial thickness of the NaF, NaCl and NaBr salt aqueous solutions probed with non-resonant surface second harmonic generation (SHG) 期刊论文 physical chemistry chemical physics, 2008, 卷号: 10, 期号: 32, 页码: 4920-4931 作者:  Bian, Hong-tao;  Feng, Ran-ran;  Xu, Yan-yan;  Guo, Yuan;  Wang, Hong-fei 收藏  |  浏览/下载：12/0  |  提交时间：2015/11/11