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检索条件"任意字段=IEEE International Conference on Robotics, Intelligent Systems and Signal Processing, RISSP 2003"

共 557 条记录，以下是31-40 订阅

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A new method on converting polygonal meshes to volumetric datasets

A new method on converting polygonal meshes to volumetric da...

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Wu, XJ Liu, WJ Wang, TR Chinese Acad Sci Shenyang Inst Automat Grad Sch Adv Fmg Lab Shenyang 110016 Peoples R China

ISBN: (纸本)078037925X

The voxel-based models are used extensively in many fields, such as medical image reconstruction, volume rendering and fluid dynamics, etc. Especially in robotics, voxel-based model is a powerful tool to execute collision detection. Voxelization refers to a process to convert data from one source type into a three dimensional volume dataset. In this paper an algorithm is proposed to voxelize the polygonal meshes into contour voxel representation based on the octree structure. It is proved that our algorithm is efficient and effective to voxelize 3D polygon mesh models into voxel representation, which makes it possible be employed in robotics and current CAD systems for true solid modeling with particular interior attributes, such as colors, density and materials etc.

关键词： rendering (computer graphics) data visualisation robots octrees solid modelling mesh generation CAD polygonal meshes volumetric datasets voxel-based models robotics three dimensional volume dataset octree structure collision detection CAD systems contour voxel representation

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A new robust BP algorithm and its application on the identification of dynamic system

A new robust BP algorithm and its application on the identif...

引用

ieee international conference on robotics, intelligent systems and signal processing, rissp 2003

作者： Sun, Yan-Jun Li, Jun-Wei Song, Su Control Eng. Coll. Beijing Univ. of Technol. China

In this paper, we propose a new robust BP algorithm that is resistant to the noise effects and is capable of rejecting entrapment into local minima during the identification of dynamic system. The spirit of this algorithm comes from the pioneering work in an old robust BP algorithm by David Chen, but our work improves the old one in two aspects: 1) enhance the stability by employing the relative residual in defining the objective function. 2) prevent entrapping into local minima through letting the learning rate be a specific function of the LS energy function and its gradient. In contrast to the standard BP algorithm, four advantages of the new algorithm are: 1) it need not interpolate all the training data;2) it is robust against gross errors;3) its rate of convergence is improved since the influence of incorrect data is suppressed;4) it prevents entrapping into local minima effectively. © 2003 ieee.

关键词： signal processing

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A global optimization algorithm for the minimum test set of circuits

A global optimization algorithm for the minimum test set of ...

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Lu, CH Zhang, QB Jiang, WW Hefei Univ Technol Hefei 230009 Peoples R China

ISBN: (纸本)078037925X

With the developing of the microprocessor and SOC (system on a chip) techniques, the research on the testability of mixed-signal (digital and analogue signal) circuits has became urgently requisite. The Discrete Event System (DES) theory gave a uniform and systematic approach for the testability and faulty-diagnosis problems of mixed-signal circuits. In this approach, one of the two main tasks is finding the minimum test set of the mixed-signal circuits. This paper illustrates a combinational optimization method based on the Simulated Annealing for the minimum test set of the mixed-signal circuits. Then there is the discussion about the convergence the algorithm's searching process. Finally, some research directions are pointed out.

关键词： simulated annealing mixed analogue-digital integrated circuits integrated circuit testing discrete event systems system-on-chip microprocessor chips fault diagnosis circuit optimisation convergence global optimization algorithm microprocessor SOC system on chip mixed-signal circuits testability discrete event system DES minimum test set fault diagnosis simulated annealing convergence searching process combinational optimization method

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Prediction analysis of the electromagnetic interfering signal in communication systems

Prediction analysis of the electromagnetic interfering signa...

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Liu, P Xie, YP Ma, YJ Zang, RH Dalian Univ Technol Sch Elect & Informat Engn Dalian 115023 Peoples R China

ISBN: (纸本)078037925X

This paper is devoted to investigation on prediction analyzing of the electromagnetic interfering signal in communication systems. In this paper we proposed the concept of mathematical model group, and discussed the problem from several aspects which is listed below: frequency band of the transmitter clutter and harmonic model of the receiver the radiation power of the receiver the modulation envelope curve, the frequency selection curve of the receiver the correction factor of frequency interval and frequency selection, the susceptibility threshold, and the interfering signal power. When the frequency of the clutter approached the affected receiver working frequency f(R), it would form a sort of interference which affect the receiver. If the complementary wave of the interference of FIM, RIM, TIM and SIM is less than -20dB, it could be regarded that no interference exists. Otherwise, it could be regarded that the interference exists, and some measure must be used to eliminate the interference.

关键词： electromagnetic interference clutter modulation prediction theory radio receivers radio transmitters prediction analysis electromagnetic interfering signal communication systems frequency band harmonic model radiation power modulation envelope curve frequency selection curve frequency interval frequency selection interfering signal power

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Neural based adaptive control of underwater vehicle

Neural based adaptive control of underwater vehicle

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Xing, ZW Zhang, Y Liu, KZ Feng, XS Chinese Acad Sci Shengyang Inst Automat Underwater Engn Res Grp Shenyang 110015 Peoples R China

ISBN: (纸本)078037925X

A neural network based adaptive inverse control structure fit for the decoupling control of underwater vehicle is proposed. The process of decoupling does not depend on the dynamic model and coupling model of the plant. The coupling between different variables is suppressed through a disturbance canceller. The validation of the scheme is verified by simulation.

关键词： Adaptive control systems

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A fault identification approach for analog circuits using fuzzy neural network mixed with genetic algorithms

A fault identification approach for analog circuits using fu...

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Liang, GC He, YG Hunan Univ Fac Elect & Informat Engn Changsha 410082 Peoples R China

ISBN: (纸本)078037925X

A fault identification approach for nonlinear analogue systems is presented A fuzzy neural network is developed based on the improving fuzzy weighted reasoning method. The training of network weights and optimization of membership functions are conducted employing genetic algorithms. Fuzzy rules can be realized through the refresh of the weights of the neural network. The availability of the method is examined by simulated test examples.

关键词： fault diagnosis analogue circuits fuzzy neural nets genetic algorithms fuzzy set theory learning (artificial intelligence) fault identification analog circuits fuzzy neural network genetic algorithms nonlinear analogue systems fuzzy weighted reasoning method training optimization membership functions fuzzy rule

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A near optimal tracking control of dynamic nonholonomic systems

A near optimal tracking control of dynamic nonholonomic syst...

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Wang, J Qu, ZH Univ Cent Florida Orlando FL 32816 USA

ISBN: (纸本)078037925X

In this paper, the tracking problem of dynamic nonholonomic systems is investigated. By separately considering kinematic and dynamic models of a nonholonomic system, a new real-time nearoptimal control is proposed based on the backstepping design. Besides being implementable online, the proposed control has the property that its closeness to the optimal control obtained off-line and numerically can be measured and monitored. To show its effectiveness, the proposed control is simulated for a unicycle wheeled mobile robot.

关键词： Mobile robots

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Extracting gear fault features using integrated bispectrum

Extracting gear fault features using integrated bispectrum

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Zhang, GC Du, RX Shi, TL Chinese Univ Hong Kong Dept Automat & Comp Aided Engn Shatin Hong Kong Peoples R China

ISBN: (纸本)078037925X

Gear fault feature extraction using integrated bispectrum is investigated in this paper. Integrated bispectrum is a kind of I-D higher order spectra, it is obtained by integrating out one of the two frequency variables of the bispectrum. Integrated bispectrum provides more of signal features than bispectrum slices do. Moreover, it is more convenient to use than all kinds of 1-D bispectrum slices. Experimental results show that integrated bispectrum is more effective than bispectrum slices in extracting mechanical fault features.

关键词： signal processing

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Ground condition sensing of a snake-like robot

Ground condition sensing of a snake-like robot

引用

ieee international conference on robotics, intelligent systems and signal processing

作者： Lu, Y Ma, SG Li, B Chen, L Robotics Laboratory Shenyang Institute of Automation CAS China Department of Systems Engineering Ibaraki University Japan

ISBN: (纸本)078037925X

Snake-like robot has its unique locomotion mode and can change its locomotion form while the ground condition changed, to achieve the best velocity and efficiency. We first analyze the snake-like robot locomotion on different terrains simply, then point out the significance to sense the ground status that is the base of choosing different locomotion form on different ground. Last we use force sensors to distinguish the different ground status.

关键词： Robots

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A general computer simulation platform for distributed multi-robot systems

A general computer simulation platform for distributed multi...

引用

ieee international conference on robotics, intelligent systems and signal processing, rissp 2003

作者： Mao, Xiao-Feng Cao, Zhi-Qiang Tan, Min Huang, Lin Zhang, Bin Department of Mechanics and Engineering Science Peking University Beijing100871 China Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences P. O. Box 2728 Beijing100080 China Computer Science Department University of Southern California CA90007 United States

The paper presents a general computer simulation platform CASIA-MR. Designed for simulating experiments on distributed multi-robotic systems, the platform bears virtues of generality, preciseness, facility as well as various functions such as real-time display, recording-replay and capability of supporting algorithm developing. Moreover, the platform is easy to be modified and operated. Many algorithms have been developed on this platform. © 2003 ieee.

关键词： Real time systems

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