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浏览/检索结果: 共14条，第1-10条 帮助

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Motion planning of ground simulator for space instable target based on energy saving 期刊论文  OAI收割
Machines, 2021, 卷号: 9, 期号: 12, 页码: 1-22
作者:  Bai XL(白鑫林);  Li XW(李锡文);  Zhao, Zhen;  Yang MY(杨明毅);  Zhang, Zhang
  |  收藏  |  浏览/下载：42/0  |  提交时间：2022/01/13
Reducing Redundancy of Musculoskeletal Robot With Convex Hull Vertexes Selection 期刊论文  OAI收割
IEEE TRANSACTIONS ON COGNITIVE AND DEVELOPMENTAL SYSTEMS, 2020, 卷号: 12, 期号: 3, 页码: 601-617
作者:  Zhong, Shanlin
  |  收藏  |  浏览/下载：26/0  |  提交时间：2021/01/07
Polarimetric MDS of pedestrian 期刊论文  OAI收割
ELECTRONICS LETTERS, 2018, 卷号: 54, 期号: 17, 页码: 1051-1052
作者:  Kang, Wenwu;  Zhang, Yunhua;  Dong, Xiao;  Kang, WW (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, CAS Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
  |  收藏  |  浏览/下载：36/0  |  提交时间：2018/10/12
Scale-dependent nonequilibrium features in a bubbling fluidized bed 期刊论文  OAI收割
AICHE JOURNAL, 2018, 卷号: 64, 期号: 7, 页码: 2364, 2378
作者:  Wang, HF;  Chen, YP;  Wang, W;  Wang, Haifeng;  Chen, Yanpei
  |  收藏  |  浏览/下载：40/0  |  提交时间：2018/12/29
Rolling motion behavior of rockfall on gentle slope: an experimental approach 期刊论文  OAI收割
Journal of Mountain Science, 2017, 卷号: 14, 期号: 8, 页码: 1550-1562
作者:  CUI Sheng-hua;  PEI Xiang-jun;  HUANG Run-qiu
  |  收藏  |  浏览/下载：63/0  |  提交时间：2017/08/17
Experimental measurements of sediment incipient velocity by using B-scan ultrasound imaging device in the water channel 期刊论文  OAI收割
MEASUREMENT, 2017, 卷号: 98, 页码: 228-236
作者:  Zou, Xianjian;  Wang, Chuanying;  Song, Huan;  Han, Zengqiang;  Ma, Zhimin
  |  收藏  |  浏览/下载：28/0  |  提交时间：2018/06/05
三维水流作用下散列体泥沙的起动研究/Study on sediment incipient motion under the action of three-dimensional flow[J] 期刊论文  OAI收割
泥沙研究, 2015, 卷号: 1, 页码: 7-13
作者:  刘蛟;  严军;  刘铁;  钟瑞森;  LIU Jiao
  |  收藏  |  浏览/下载：30/0  |  提交时间：2017/12/29
基于多连杆机构的仿生机器水母的设计与实现 学位论文  OAI收割
工程硕士, 中国科学院自动化研究所: 中国科学院大学, 2014
肖俊东
收藏  |  浏览/下载：380/0  |  提交时间：2015/09/02
Design of motion compensation mechanism of satellite remote sensing camera (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
Gu S.; Yan Y.; Xu K.; Jin G.
收藏  |  浏览/下载：47/0  |  提交时间：2013/03/25
With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.  
Design of ground-based physical simulation system for satellite-borne TDI-CCD dynamic imaging (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  Zhang L.;  Zhang L.;  Sun Z.
收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25
As we know  the existence of image motion has a bad effect on the image quality of satellite-borne TDI CCD camera. Although many theories on image motion are proposed to cope with this problem  few simulations are done to justify the proposed theories on ground. And thus  in this paper  a ground-based physical simulation system for TDI CCD imaging is developed and specified  which consists of a physical simulation subsystem for precise satellite attitude control based on a 3-axis air bearing table  and an imaging and simulation subsystem utilizing area-array CCD to simulate TDI CCD. The designed system could realize not only a precise simulation of satellite attitude control  whose point accuracy is above 0.1 and steady accuracy above 0.01/s  but also an imaging simulation of 16-stage TDI CCD with 0.1s its integration time. This paper also gives a mathematical model of image motion of this system analogous with satellite-borne TDI CCD  and detailed descriptions on the principle utilizing area-array CCD to simulate TDI CCD. It is shown that experiment results are in accordance with mathematical simulation  and that the image quality deteriorate seriously when the correspondence between the image velocity and signal charges transfer velocity is broken out  which suggest not only the validity of the system design but also the validity of the proposed image motion theory of TDI CCD. 2010 SPIE.