中国科学院机构知识库网格系统: 检索

Integrated transmission technology of non-contact power and signal in rotary steering system 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2023, 卷号: 66, 期号: 1, 页码: 101-110
作者: Xie QiJun; Di QingYun; Yang YongYou; Liu QingBo; Zhang Hui

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收藏 | 浏览/下载：61/0 | 提交时间：2023/03/30

Rotary steering system Non-contact and integrated transmission Signal modulation and demodulation

Parallel distance: A new paradigm of measurement for parallel driving 期刊论文 OAI收割
IEEE-CAA JOURNAL OF AUTOMATICA SINICA, 2020, 卷号: 7, 期号: 4, 页码: 1169-1178
作者: Liu, Teng; Wang, Hong; Tian, Bin; Ai, Yunfeng; Chen, Long

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收藏 | 浏览/下载：70/0 | 提交时间：2020/08/03

Artificial and physical system parallel distance parallel driving 3.0 parallel system rotational and accelerator signal

A digital wide range neutron flux measuring system for HL-2A 期刊论文 OAI收割
PLASMA SCIENCE & TECHNOLOGY, 2017, 卷号: 19, 期号: 8
作者: Yuan Chen; Wu Jun; Yin Zejie

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收藏 | 浏览/下载：38/0 | 提交时间：2021/12/13

FUSION TEST REACTOR ABSOLUTE CALIBRATION MONITORING-SYSTEM TOKAMAK ITER SPECTROSCOPY YIELDS TFTR EAST HL-2A plasma diagnosis neutron flux measurement signal collection and treatment

Orbit improvement for Chang'E-5T lunar returning probe with GNSS technique 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2015, 卷号: 56, 期号: 11, 页码: 2473-2482
作者: Fan, Min; Hu, XiaoGong; Dong, Guangliang; Huang, Yong; Cao, Jianfeng

收藏 | 浏览/下载：114/0 | 提交时间：2016/01/14

Chinese lunar exploration program Global navigation satellite system Weak signal acquisition and tracking performance Fusion processing of space- and ground-based data Accuracy of orbit determination and prediction

Simulation test system of CCD signal processor based on FPGA (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan
作者: Zhang D.; Liu D.-B.; Zhang D.

收藏 | 浏览/下载：57/0 | 提交时间：2013/03/25

Simulation test system of CCD signal processor based on FPGA is proposed. Field-programmable gate array (FPGA) is applied as control processing core and used in the aerospace upgrade screening of industrial grade signal processor. The system functional composition and working principle were introduced in detail. Actually evaluation and testing system was completed with integrating the forty signal processor in a single board. The system has been successfully applied in the dynamic build-in screening test of industrial grade signal processor XRD98L63 the system work stably and reliability. Test result is zero on the nonconforming product rate satisfying the qualification that single batch screening nonconforming rate is less than 5% build-in screening of industrial grade components for the space load applications is implemented. (2013) Trans Tech Publications Switzerland.

Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Sun Z.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

A comparison study on temperature measurement precision between middlewave 3-5m and longwave 8-12m measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K900K. First the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity limited transmittance of the atmosphere radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do. 2012 IEEE.

Design of high speed and parallel compression system used in the big area CCD of high frame frequency (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Precision Engineering and Non-Traditional Machining, PENTM 2011, December 9, 2011 - December 11, 2011, Xi'an, China
作者: Li G.-N.; Jin L.-X.; Zhang R.-F.; Wang W.-H.; Li G.-N.

收藏 | 浏览/下载：70/0 | 提交时间：2013/03/25

According to the area CCD camera of characteristics such as high resolution capacity and high frame frequency this paper puts forward a high speed and parallel image compression system of high integration degree. Firstly according to the work principle of the area CCD FPGA is adopted to realize the timing driving and multichannel and parallel analog signal handling to raise the export frame frequency of the area CCD. Secondly with an image compression scheme based on FPGA embedded processor MicroBlaze and ADV212 compression chip real time image compression and the high speed area CCD are realized. Finally by detecting the analog signal of the area CCD output the real time compression of the big area CCD image is carried out in different compression ratios and the compression performance is analyzed. Experiment result shows that this scheme can realize real time image compression with the biggest data rate of 520Mbps. When compression bit ratio is 0.15 the signal-to-noise ratio of peak value can reach 36 dB. Image collection and image compression are integrated which reduces the data transmission between them and improves systematic integration degree.

Modeling and variable structure control of a vehicle flexible manipulator (EI CONFERENCE) 会议论文 OAI收割
10th World Congress on Intelligent Control and Automation, WCICA 2012, July 6, 2012 - July 8, 2012, Beijing, China
作者: Wang Z.; Li Y.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

In this paper the mathematical modeling and the application of a new trajectory tracking control technique for hydraulic-driven rigid-flexible manipulator are concerned. To get a closer dynamic behavior of the real system both the flexible manipulator linkage and the actuator dynamics are considered. The exact dynamic model of flexible manipulator is derived using Lagrange principle and assumed modes method. The partial decoupled dynamic equation is derived using nonlinear decoupling feedback control method. The whole dynamic model is established by a driven Jacobin matrix which represents the coupling between hydraulic servo system and mechanical system. A variable structure controller with inverse dynamics is designed for trajectory tracking. To weaken the chattering of control signal saturation function is used to instead of sign function. The experimental results investigate the effectiveness of the proposed approaches. 2012 IEEE.

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：49/0 | 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

A signal process system for photoelectric encoder based on C8051F021 MCU (EI CONFERENCE) 会议论文 OAI收割
2nd World Congress on Computer Science and Information Engineering, CSIE 2011, June 17, 2011 - June 19, 2011, Changchun, China
作者: Gao X.

收藏 | 浏览/下载：48/0 | 提交时间：2013/03/25

In order to minimize the size of photoelectric encoder a signal process system was designed and C8051F021 MCU was its core device. To begin with the processing electrocircuit and the data processing software used for the 16-bit encoder was developed. Then the feasibility of this system was verified by experiment. The experimental result proves that the signal process system was simple in structure and reliable. The size of the electrocircuit was 40mm.The precision of the 16-bit photoelectric encoder is 22.4". 2012 Springer-Verlag Berlin Heidelberg.