中国科学院机构知识库网格系统: 检索

Design and implementation of a single actuated bio-mimetic robotic fish (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者: Wang X.; Wang X.; Wang X.

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The mechanical structure of a single actuated bio-mimetic robotic fish was designed based on forced vibration responses of a non-prismatic cantilever which mimicked the fish body deformation. To realize the cruising turning and burst-and-coast moving modes the hardware system based on the micro controller unit STM32F103C8T6 and the control were developed. The state variable feedback method and PID method were used to design the control algorithms respectively. The simulation and experimental results showed that the whole system could imitate the swimming of the real fish. 2012 IEEE.

Use skill of external memory expansion for DSP of TMS320VC5409 (EI CONFERENCE) 会议论文 OAI收割
2012 International Meeting on Opto-Electronics Engineering and Materials Research, OEMR 2012, July 27, 2012 - July 29, 2012, Shenyang, Liaoning, China
作者: Huang L.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

This paper proposes the external data memory and program memory using skills for DSP of TMX320VC5409. Firstly the memory allocation of TMX320VC5409 is described and the its assembly line operation is analyzed. Secondly the external program memory space memory structure and external data memory and program memory extension using skills are discussed. Finally the IS61LV12816 is taken as an example to design the external memory expansion of the hardware and software. The practice has proved that the mode has great flexibility and practicality. (2012) trans tech publications switzerland.

The research of electromachanical actuator control system development based on the MATLAB platform using the RTDX (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Zhang J.; Zhang Y.; Zhang J.; Zhang J.

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In order to rapidly develop the control system code of the Electromachanical Actuator(EMA) the DSP development platform is established mostly based on the MATLAB and the development metheod is researched.First the DSP development platform archtecture in the environment of MATLAB is briefly introduced.And the principle of data exchange is showed.Then the EMA hardware structure is necessarily explained which one is for the developer to conveniently configure the system.Finally the developer reasonably configures the DSP models used in the simulink and constitutes them to speed and position closed loop control system of the EMA by using the RTDX and the MATLAB GUI. The EMA control system code will be debuged rapidly through this platform.The executed DSP code will be generated automatically.And the result of degugging would be showed on the MATLAB GUI.For generlly speaking the difficulties of the EMA control system code development method is reduced and the development cycle is shortened through the MATLAB model.This system development method is fast and effective. 2011 IEEE.

Controlling system for smart hyper-spectral imaging array based on liquid-crystal Fabry-Perot device 期刊论文 OAI收割
proceedings of spie- the international society for optical engineering, 2011, 卷号: 8002, 页码: 80020e
Jiang, Xue; Chen, Xin; Rong, Xin; Liu, Kan; Zhang, Xinyu; Ji, An; Xie, Changsheng

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Crystal structure Digital circuits Fabry-Perot interferometers Hardware Image acquisition Liquid crystals Operational amplifiers

Sort optimization algorithm of median filtering based on FPGA (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Machine Vision and Human-Machine Interface, MVHI 2010, April 24, 2010 - April 25, 2010, Kaifeng, China
作者: Li S.

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The traditional sorting algorithm of median filtering is optimized according to the hardware structure features of FPGA. FPGA is used to acquire the data parallelly for comparing the data of the same column in the median filtering window. Comparing results shared by adjacent filter window are saved temporarily to match the new round of median filtering by using FPGA internal resources. This method can reduce the comparing times from current 21 down to 13 and improve the algorithm efficiency nearly 40%.The experimental results prove that the optimized algorithm can filter a 1K1K gray-level image in about 20ms which ensure the proposed algorithm can be applied in the real-time image median filtering system. 2010 IEEE.

The parallel computation in one-way hash function designing (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: Yang H.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

In order to put the parallel one-way hash function into engineering two designing models based on pipeline technology are proposed in this paper. The definition of one-way hash function is shown first and the structure and limitation of the current hash functions are discussed afterward. By analyzing the difference between parallel computation on different platforms and classifying one-way hash functions on application basis the possibility and method of parallel one-way hash function designing on different hardware platforms are described two designing models are constructed for the parallel one-way hash function designing. Finally some attentions for designing are proposed from the engineering angle. The pipeline models that proposed in this paper contact the theoretical rationality and the engineering application of parallel one-way hash function together which can improve the practicality of parallel one-way hash function to a great extent. 2010 IEEE.

A 3-axis simulator for spacecraft attitude control research (EI CONFERENCE) 会议论文 OAI收割
2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China
作者: Dai L.

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This article presents the details of a new 3-axis simulator for spacecraft attitude control research and simulation. The air bearing allows the test bed to rotate about three axes with tiny friction. The attitude determination system consists of three fibre optical gyros an inclinometer and a magnetometer. The actuator of the system consists of three reaction flywheels and four control moment gyros (CMG). Mathematical models of the sensors and actuators are given to help algorithm design. An extended Kalman filter was designed to provide attitude information for controller. Mathematical simulation results prove the attitude determination system can achieve high precision. A coulomb friction model of reaction wheels is given with experimental results. A friction compensation algorithm was developed to raise the pointing accuracy of the control system. The article also describes the details of the hardware structure. A PD stabilizing controller is implemented to test the validation of the whole control system at last. 2010 IEEE.

A digital image processing system based on DSP (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Information Engineering and Computer Science, ICIECS 2010, December 25, 2010 - December 26, 2010, Wuhan, China
作者: Liu Y.; He X.; Liu Y.; Liu Y.

收藏 | 浏览/下载：10/0 | 提交时间：2013/03/25

In order to detect the target position real-timely a real time target detecting system based on tms320F2812 DSP and Spartan3-SC3S400 FPGA is designed. The design hardware structure a target detecting method and software char flow of FPGA and DSP are presented. The system is tested by a 1Kx1K image the processing time is 1.3ms experiments results show that the method is feasible the simple design and stable correct results make this method very ascendant in practical application. 2010 IEEE.

High accuracy star image locating and imaging calibration for star sensor technology (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

Today aircraft attitude measurement technology plays an important role in an aircraft system because it can provide orientation for aircraft in action. Lately star sensor technology used in aircraft attitude measurement has become more and more popular because of its high accuracy light weight without attitude accumulation errors and other advantages. There are three main steps for star sensor to measure aircraft attitude star image locating star identification and attitude tracking. The latter two steps are based on the accuracy of star image locating. So it's critical to make efforts to advance the accuracy of star image locating. Some imaging errors such as spherical aberration or coma aberration also have negative effect on the accuracy of star image locating of which the effect is necessarily reduced as well. At the beginning of this article the structure of star sensor hardware is introduced. Secondly three methods for star image locating are described specifically which are traditional centroid method Gauss quadric fitting method and improved Gauss quadric fitting method. Subsequently an imaging calibration method is described for the purpose of reducing the effect of imaging errors. Finally the experiment shows that the accuracy of the star sensor is 2-arc-second. 2010 SPIE.

The development and design of the gas-liquid two-phase flow-meter system based on DSP (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Advanced Computer Theory and Engineering, ICACTE 2008, December 20, 2008 - December 22, 2008, Phuket, Thailand
Zhu J.-W.

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Recently as the fast development of the modern engineer the measuring problem of the gas and liquid is becoming prominence and many countries spend so much in the research. The system with which the thesis developed has realized data acquisition data compression and decompression a friendly human-machine interface RS232 serial communication reading or writing USB disk. The architecture of system is flexible. The thesis presents a research on the measurement process and the whole structure of the flow metering system and analyzes the schematic circuit of the main hardware modules 2008 IEEE.