中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Numerical simulation and experimental testing of dynamic stiffness of angular contact ball bearing 期刊论文  OAI收割
Advances in Mechanical Engineering, 2018, 卷号: 10, 期号: 9, 页码: 1-14
作者:  
Luo HT(骆海涛);  Fu J(富佳);  Yu CS(于长帅);  Liu GM(刘广明);  Wang W(王巍)
  |  收藏  |  浏览/下载:40/0  |  提交时间:2018/12/01
Optimum design of laser encoding and decoding on laser beam-riding guidance (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011, December 11, 2011 - December 13, 2011, Taichung, Taiwan
作者:  
Yang L.;  Yang L.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Operating principle of laser beam-riding guidance was set forth. Based on the principle of spatial frequency-encoding  experimental results demonstrated that the receiver can receive correctly the encoded signal and can decode the signal  an optimum laser encoding mode was designed  measurement for the missdistance is feasible and all the performance parameters satisfy the demand. (2012) Trans Tech Publications  which can transfer continuous laser into pulse laser that represents different position information. Then the mathematic model of deviation from target is built  Switzerland.  a modified encoding pattern was presented  which is composed of two light paths crossed 90. Azimuth information of target is given in orthogonal coordinate system and deviation from target is linearity. As well as  characteristic distribution of spatial laser field is analyzed. Corresponding decoding mode was presented  by testing in 2 kilometers outdoor  
Experimental study of the compressive performance of life jacket use polyurethane foam for blast wave protection 会议论文  OAI收割
2012 2nd International Conference on Advanced Material Research, ICAMR 2012, Chengdu, China, JAN 07-08, 2012
作者:  
Li MH;  Bai CH;  Shi MW;  Wei YP(魏延鹏);  Zhou H
收藏  |  浏览/下载:32/0  |  提交时间:2013/02/26
Experimental study of erosion threshold of reconstituted sediments 会议论文  OAI收割
30th International Conference on Ocean, Offshore and Arctic Engineering, Rotterdam, NETHERLANDS, JUN 19-24, 2011
作者:  
Ye ZH;  Cheng L;  Zang ZP(臧志鹏)
收藏  |  浏览/下载:26/0  |  提交时间:2013/02/26
Small aircraft CAN bus signal acquisition equipment (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Chen C.-Q.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
Small aircraft often used RS485 bus. But with the complexity of the small aircraft's subsystems increase and the progress of field bus technology  CAN bus systems in small aircraft use more and more widely. How to record real-time flight experiment data on the small aircraft's CAN bus and provide test data for reproducing the process of a small aircraft flying is very important. This paper presents a design method of signal acquisition device  it can be used for small aircraft flying field experiment. 2010 IEEE.  as the main chip with DSP2812  SJA1000 as CAN controller  CTM1050 as the CAN transceiver  CF card as storage media. Gives the diagram of its hardware and software design process. Combined with the background of a small aircraft  testing the instrument for data acquisition when the ground experiments and flight progress. Experimental data show that the design of high reliability and CAN signals can effectively complete the record  
A new method of measuring lead screw with dual-frequency laser interference (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者:  
Qi X.-D.
收藏  |  浏览/下载:35/0  |  提交时间:2013/03/25
AE signal processing and DSP implementation based on wavelet packet analysis (EI CONFERENCE) 会议论文  OAI收割
ICMIT 2005: Information Systems and Signal Processing, September 20, 2005 - September 23, 2005, Changchun, China
作者:  
Zhao J.;  Wang K.
收藏  |  浏览/下载:12/0  |  提交时间:2013/03/25
To improve the accuracy of AE (Acoustic Emission) testing  the wavelet packet analysis was introduced to process the AE signals. Extraction of the fault characteristic information would be influenced greatly if the faulted AE signal was not effectively denoised. Based on discussing the fast searching algorithm of BWPB (Best Wavelet Packet Basis) adopting Shannon entropy  a new method based on BWPB was presented to denoise the AE signal from the faulted composite plate. Analyzing was performed on the denoised signal and the fault characteristic information was exacted. To improve the real-time performance of the wavelet packet analysis algorithm  it was performed on the DSP (Digital Signal Processing) chip TMS320VC5409. The experimental results show that the algorithm can not only reduce the noise by 10dB but also effectively extract the faulted characteristics information from the AE signal.