中国科学院机构知识库网格系统: 检索

Fixed-time observer based adaptive neural network time-varying formation tracking control for multi-agent systems via minimal learning parameter approach 期刊论文 OAI收割
IET CONTROL THEORY AND APPLICATIONS, 2020, 卷号: 14, 期号: 9, 页码: 1147-1157
作者: Xiong, Tianyi; Pu, Zhiqiang; Yi, Jianqiang; Tao, Xinlong

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收藏 | 浏览/下载：54/0 | 提交时间：2020/07/06

neurocontrollers multi-agent systems Lyapunov methods closed loop systems nonlinear control systems time-varying systems adaptive control observers uncertain systems position control radial basis function networks robust control control system synthesis learning (artificial intelligence) minimal learning-parameter approach fixed-time CLSO time-varying formation tracking problem formation tracking control scheme multiagent systems time-varying formation tracking control problem model uncertainties velocity measurements radial basis function neural networks fixed-time cascaded leader state observer fixed-time observer-based adaptive neural network time-varying formation tracking control RBFNN-based adaptive control scheme

Interaction between the atmospheric boundary layer and a standalone wind turbine in Gansu-Part I: Field measurement 期刊论文 OAI收割
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2018, 卷号: 61, 期号: 9, 页码: 94711
作者: Li DS; Guo T

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收藏 | 浏览/下载：43/0 | 提交时间：2018/10/30

wind power atmospheric turbulence effects velocity measurements turbulent wakes large-eddy simulations

SONG-China Project High Resolution Spectrograph and High Precision Radial Velocity Measurements of Asteroseismology 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 卷号: 38, 期号: 2, 页码: 621-626
作者: Yan Zheng-zhou

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收藏 | 浏览/下载：41/0 | 提交时间：2020/03/11

High resolution spectrograph High precision radial velocity measurements

Attitude Coordination Control for a Group of Spacecraft Without Velocity Measurements 期刊论文 OAI收割
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, 2012, 卷号: 20, 期号: 5, 页码: 1160-1174
作者: Zou, An-Min; Kumar, Krishna Dev; Hou, Zeng-Guang

收藏 | 浏览/下载：56/0 | 提交时间：2015/08/12

Adaptive control attitude coordination Chebyshev neural networks (CNNs) spacecraft formation flying (SFF) without velocity measurements

Multi-parameters decoupling method with Lamb wave sensor for improving the selectivity of label-free liquid detection (EI CONFERENCE) 会议论文 OAI收割
2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11, June 5, 2011 - June 9, 2011, Beijing, China
作者: Zhou L.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

The anti-symmetric modes (A01 mode for low frequency A 03 mode for high frequency) and symmetric modes (S0 mode) produced by Lamb wave sensor are used to detect multi-parameters of a liquid such as its density sound velocity and viscosity. These modes are found to be very different to the parameters. For example the A01 mode is very sensitive to the liquid's density but the A03 mode is sensitive to its sound velocity. The measurements of the attenuation with S0 mode can give out liquid's viscosity after its density been determined by A 01 mode. That could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of the selectivity of label free detection on biosensors. 2011 IEEE.

Pile settlement and volume reduction measurement during forced-aeration static composting EI期刊论文 OAI收割
2008
作者: Chen Tong-Bin; Gao Ding; Zheng Guo-Di

收藏 | 浏览/下载：15/0 | 提交时间：2012/06/11

Astrophysics Measurements Piles Velocity distribution

Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE) 会议论文 OAI收割
Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China
Lu D.; Guang J.; Shaoju W.; Tao C.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages such as small FOV high power consumption low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.

The Simulation measurement experiment and calibration for Solar Total Irradiance Monitor on board (EI CONFERENCE) 会议论文 OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Yupeng W.; Wei F.; Bingxi Y.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

STIM (Solar Total Irradiance Monitor) can be used on sun-synchronous polar orbit weather satellites to measure the total solar irradiance. It contains three independent and identical wide view absolute radiometers. They are mounted on the satellite in an angle which ensure the sun scan over the field of view of the absolute radiometers. This measurement method doesn't need the instrument tracking the sun but the sun scan over the field of view of the absolute radiometers in each orbit cycle. The paper presents the measurement method of simulation for solar irradiance measurement and calibration by mounting the instrument on a two-axis rotation table. By controlling the rotation angle velocity of the instrument in the meridian direction being the same as that of the weather satellite's on orbit we can measure the solar irradiance when the sun scan over the field of view of the absolute radiometers to simulate the onboard state. And we have operated the measurement with the prototype of STIM. The SIAR-1 is traceable to WRR and serves as a transfer standard. So simultaneous comparison measurements between SIAR-1 and each of the three wide view absolute radiometers are measured to provide calibration corrections to the instrument. And we have a further study at the influence of stray light to the measurement results. This paper presents the method of simulation experiment and calibration for solar irradiance measurement with Solar Total Irradiance Monitor on board.

UDEC simulation for the dynamic response of a rock slope subject to explosions 会议论文 OAI收割
PEOPLES R CHINA, MAY 18-21, 2004
作者:

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收藏 | 浏览/下载：12/0 | 提交时间：2018/06/05

jointed rock slope explosion dynamic response UDEC simulation peak particle velocity field measurements

Statistical properties of triple-random-modulated dynamic speckles 期刊论文 OAI收割
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1999, 卷号: 16, 期号: 6, 页码: 1387-1394
作者: Sun, H; Zhang, LY; Liu, Y; Ma, SN; Sun, H , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.

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收藏 | 浏览/下载：23/0 | 提交时间：2012/08/29

Multimode Optical Fiber Velocity-measurements Diffuse Object Laser Speckles Imaging-system Illumination Circulation