中国科学院机构知识库网格系统: 检索

Research on Development and Model of Intelligent Transportation Systems 会议论文 OAI收割
International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE), Jinan, PEOPLES R CHINA, April 24-26, 2015
作者: Wang DP(王丹萍); Hu KY(胡琨元); Han Xiaowei

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Intelligent Transportation System Architecture Model-designing

Stray light analysis of solar photoelectric detection system on space target (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Intelligent System and Applied Material, GSAM 2012, January 13, 2012 - January 15, 2012, Taiyuan, Shanxi, China
Li L.-Y.; Wang Y.-F.; San X.-G.

收藏 | 浏览/下载：161/0 | 提交时间：2013/03/25

Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation build up evaluation index of stray light system to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle baffle vane and the coating technology. In order to verify the prosperity of structure that designed we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually and so measurement precision was improved from detection graphics. (2012) Trans Tech Publications.

Trajectory tacking control of a quad-rotor based on active disturbance rejection control (EI CONFERENCE) 会议论文 OAI收割
2012 IEEE International Conference on Automation and Logistics, ICAL 2012, August 15, 2012 - August 17, 2012, Zhengzhou, China
Gong X.; Tian Y.; Bai Y.; Zhao C.

收藏 | 浏览/下载：57/0 | 提交时间：2013/03/25

The objective of this paper is to deal with a trajectory tracking of a Quad-rotor unmanned aerial vehicle (UAV). For the model uncertainty the external disturbance and the coupling factor are considered an active disturbance rejection control (ADRC) algorithm is introduced into the designing procedure. The aircraft dynamic model is proposed in this article based on which the closed-loop control system is divided into four independent channels with the coupling factor compensated by the extended state observer (ESO). The nonlinear state error feedback (NLSEF) algorithm is designed in each channel to improve the closed-loop dynamics. In this article the ADRC controller is expressed in the discrete form. And finally the simulation results show that the proposed control algorithm achieves a favourable tracking performance. 2012 IEEE.

关键字营销中若干博弈问题研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2011
作者: 李林静

收藏 | 浏览/下载：93/0 | 提交时间：2015/09/02

关键字拍卖 GSP机制线性机制设计稳定均衡无风险对称均衡预算分配二维Newsboy模型 Keyword Auction Generalized Second-price Mechanism Linear Mechanism Designing Stable Nash Equilibrium Risk-free Symmetrical Nash Equilibrium Budget Allocation Two-dimensional Newsboy Model

Robust trajectory tracking control of autonomous quad-rotor UAV based on double loop frame (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Materials, Mechatronics and Automation, ICMMA 2011, January 15, 2011 - January 16, 2011, Melbourne, VIC, Australia
作者: Sun Q.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

This paper deals with the under-actuated characteristic of a quad-rotor unmanned aerial vehicle (UAV). By designing the double loop configuration the autonomous trajectory tracking is realized. The model uncertainty external disturbance and the senor noise are also taken into consideration. Then the H controller is put forward in the inner loop. An optimal stability augmentation control (SAC) method is used to stabilize the horizon position and keep it away from oscillation. By calculating the nonlinear decouple map control quantity is converted to the speeds of the four rotors. At last some simulation results and the prototype implementation prove that the control method is effective.

The error analysis of automated biochemical analyzer (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Computing, Information and Control, ICCIC 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Qinghai C.; Yihui W.; Haiwen L.; Peng H.

收藏 | 浏览/下载：68/0 | 提交时间：2013/03/25

In order to find out the relationships between the four error sources namely locating error optics system fluctuations sampling error and temperature fluctuations and the accuracy of the instrument we analyzed each relationship of them and found that the effect of locating error is so tiny that it can be ignored finally established the total error model and the model of the allowed noise of the optics system of the instrument. Analysis and the models may supply a reliable theory evidence for the improvement of the instrument and the designing of similar instruments. 2011 Springer-Verlag.

The flow field analysis of the automotive power streering congtrol unit's flow channel (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China
Cheng K.; Yan L.; Li G.; Tang J.

收藏 | 浏览/下载：48/0 | 提交时间：2013/03/25

The automotive power steering units must be taken performance test after they are integrated assembly and then left the factory if it is qualified.Because its internal flow channel is very complicated and the residual hydraulic oil can not be eleminated clearly.So we can set up a 3D model flow channel based on CATIA and use FLUENT software to analysis the key flow channel analysing it's pressure distribution and velocity vector diagram then get the real reasonable resluts which can provide the basic for the ejector designing. (2011) Trans Tech Publications.

Model identification and closed-loop confirmation for opto-electronic platform of seeker (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China
作者: Liu H.; Zhang J.; Zhang J.; Zhang J.; Chen J.

收藏 | 浏览/下载：58/0 | 提交时间：2013/03/25

A mathematical model of seeker opto-electronic platform is the basis for researching performance designing a servo control system and simulating. Focusing on high frequencies of mechanical resonant restriction of gimbaled axis rotation a new model identification method was proposed under the pseudo-random invert-M-sequences. The testing signal data acquisition the calculating of frequency response and least square identification were investigated. The realized steps are explicitly illustrated and the testing example is given in this paper the results confirm that the proposed method is effective and practical. 2010 IEEE.

Geometrical modulation transfer function of different active pixel of CMOS APS (EI CONFERENCE) 会议论文 OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
作者: Li J.; Liu J.; Liu J.; Liu J.; Li J.

收藏 | 浏览/下载：59/0 | 提交时间：2013/03/25

The geometrical Modulation Transfer Function (MTF) of CMOS APS (active pixel sensor) is analyzed in this paper. Advanced APS have been designed and fabricated where different pixel shapes such as square rectangle and L shape were placed because the amplifier circuit and other function circuits inter pixel of APS take up some pixel area. MTF is an important figure of merit in focal plane array imaging sensors. Research on analyzing the MTF for the proper pixel shape is currently in progress for a centroidal configuration of a target position. MTF will give us a more complete understanding of the tradeoffs opposed by the different pixel designs and by the signal processing conditions. Based on image sensor sampling and reconstructing model the MTF expression of any active pixel shape has been deduced in this paper. According to actual pixel shape three different active area pixels were analyzed they were square rectangle and L shape their Fill Factor (FF) is 30% 44% and 55% respectively. Results of simulation experiments indicate that different pixel geometrical characteristics contribute significantly to the figures of their MTF. Different geometrical shape of active sensitive area of pixel and different station in pixel would influence MTF figures. The analysis results are important in designing better APS pixel and more important in analyzing imaging system performance of APS subpixel precision system.

An improved adaptive neural network method for control system (EI CONFERENCE) 会议论文 OAI收割
2006 International Conference on Machine Learning and Cybernetics, August 13, 2006 - August 16, 2006, Dalian, China
Wang L.-M.; Xie M.-J.; Wu D.-Y.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

Classical methods for designing a controller depend on the accuracy of system model. However plant's models and other parts in a physical system can not accurately represent all possible dynamics. Thus the controller designed is usually not the optimal one. In this article a new simple adaptive control method which combines the classical frequency domain method with the neural network theory is proposed. Firstly we can obtain a controller using classical method. Secondly we use the coefficients in digitized controller equation as the initial values of an Adaline network. Finally LMS learning rules is used to adjust the weights adaptively. Experimental results show that this method is very effective in improving the performance of conventional controller. 2006 IEEE.