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2010 2nd International Conference on Industrial and Information Systems, IIS 2010

作者： Zeng, Xianzhi Xia, Xintao Sun, Liming Chen, Yuan Cai, Suran School of Mechatronics Engineering Henan University of Science and Technology Luoyang China Product Development Department Luoyang Bearing Science and Technology Co. Ltd. Luoyang China

ISBN: (纸本)9781424482177

Through analysing working conditions, structure forms, and technical requirements of thin walled four point contact ball bearing used for industrial robot, we propose the design theories and methods of key bearings for industrial robot and summarize the design points of thin walled four point contact ball bearing from the aspects of the optimal design of main parameters, the design of structural parameters, the design of the cage, and the design of the sealing structure. © 2010 IEEE.

关键词： Industrial robots

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VLSI implementation of sub-pixel interpolator for AVS encoder

VLSI implementation of sub-pixel interpolator for AVS encode...

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2010 International Conference on Life System Modeling and Simulation, LSMS 2010 and the 2010 International Conference on Intelligent Computing for Sustainable Energy and Environment, ICSEE 2010

作者： Guanghua, Chen Anqi, Wang Dengji, Hu Shiwei, Ma Weimin, Zeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

Interpolation is the main bottleneck in AVS real-time high definition video encoder for its high memory bandwidth and large calculation complexity caused by the new coding features of variable block size and 4-tap filter. In this paper, a high performance VLSI architecture of interpolation supporting AVS Baseline@L4 is presented. Vertical redundant data reuse, horizontal redundant data reuse and sub-pixel data reuse schemes are presented to reduce memory bandwidth and processing cycle. The separated 1-D interpolation filters are used to improve throughput and hardware utilization. The proposed design is implemented on FPGA with operating frequency of 150MHz and can support 1080p (1920x1080)/30fps AVS real-time encoder. It is a useful intellectual property design for real-time high definition video application. © 2010 Springer-Verlag.

关键词： Pixels

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Algorithm for unknown SNR estimation based on sequential Monte Carlo method in cluttered environment

Algorithm for unknown SNR estimation based on sequential Mon...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Seung Hwan Bae Yong Hoon Kim Seok Jae Lee Joo Hong Yoon Vladimir Shin Department of Mechatronics Gwangju Institute of Science and Technology Gwangju South Korea Agency for Defence Development Daejeon South Korea

In target tracking, radar or sonar sensors provide amplitude information as well as kinematic information, e.g., range and bearing. Considering the amplitude information with kinematic information, tracker can more effectively distinguish measurement origin in cluttered environment. The tracker utilizes the amplitude information in the form of signal to noise ratio (SNR). However, a major challenge comes from the fact that the SNR is often fluctuated according to the target's aspect and effective radar cross section. So the certain level of uncertainty of SNR should be reduced. Focused on the point, we propose a novel SNR estimation algorithm based on sequential Monte Carlo method. Finally, estimated SNR is applied to the probability data association filter with amplitude information. Simulation results demonstrate the effectiveness and high accuracy of the idea of exploiting SNR estimation in heavy cluttered environments.

关键词： Signal to noise ratio Clutter Target tracking Kinematics Monte Carlo methods Estimation Logic gates

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Design technology of key bearings for industrial robots Part II: Thin walled bearing with crossed cylindrical rollers

Design technology of key bearings for industrial robots Part...

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International Conference on Industrial and Information Systems, IIS

作者： Xianzhi Zeng Xintao Xia Liming Sun Yuan Chen Suran Cai School of Mechatronics Engineering Henan University of Science and Technology Luoyang China Product Development Department Luoyang Bearing Science and Technology Company Limited Luoyang China

According to the special structure types and the operating requirements of long life, high stiffness, and low friction torque of thin walled bearing with crossed cylindrical rollers used for industrial robot, this paper summarized the design points of thin walled bearing with crossed cylindrical rollers from the aspects of the optimal design of main parameters, the design of structural parameters, the design of the cage, and the calculation of the bearing carrying capacity and life.

关键词： Equations Discrete wavelet transforms Seals Robots

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Design technology of key bearings for industrial robots Part I: Thin walled four point contact ball bearing

Design technology of key bearings for industrial robots Part...

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International Conference on Industrial and Information Systems, IIS

关键词： Chromium

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Finite element analysis of piezoelectric microgenerator–towards optimal configuration

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Procedia Engineering 2010年 5卷 1312-1315页

作者： R. Dauksevicius G. Kulvietis V. Ostasevicius I. Milasauskaite Department of Information Technologies Vilnius Gediminas Technical University Sauletekio al. 11 Vilnius 10223 Lithuania Institute for High–Tech Development Faculty of Mechanical Engineering and Mechatronics Kaunas University of Technology Studentu 65 Kaunas 51369 Lithuania

The paper provides results of dynamic numerical analysis of piezoelectric cantilever-type microgenerator intended for wireless MEMS applications. This analysis constitutes an initial phase of ongoing research work aimed at microgenerator optimal design. It is based on beneficial utilization of higher vibration modes, which may offer significant benefits in terms of dynamic performance. Here we report preliminary results of simulations that were performed with a developed 3-D finite element model of the microgenerator that constitutes a bilayer cantilever structure with proof mass at the free end. The structure was subjected to harmonic base excitation by applying vertical acceleration through body load. The resulting characteristics reveal strong dependence of magnitude of generated voltage on design and excitation parameters (frequency, acceleration). Initial findings indicate the necessity to develop microgenerator design with self-tuning of the resonance frequency, i.e. the device should adapt to varying excitation frequency so as to be driven in resonance thereby achieving maximal electrical power output.

关键词： Micropower energy harvesting MEMS Ambient vibrations Piezoelectric conversion Cantilever Finite element modeling

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Performance analysis of a class of networked control systems under data rate constraints

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Journal of Shanghai University(English Edition) 2009年第5期13卷 356-358页

作者：李力雄费敏锐丁瑾 Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronics Engineering and AutomationShanghai University Software Development Center ICBC

In networked control system (NCS) where control loop is closed over communication network, limited data rate may deteriorate control performance even destabilize the control system. In this paper, performance analysis of a typical second-order control system with data rate constraints is conducted, and the concept of critical data rate (CDR) is presented. In order to find the CDR in NCS, an approximate searching method is proposed to guarantee acceptable control performance.

关键词： networked control system (NCS) data rate network-induced delay performance of control

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Modeling and stabilization of motorcycle shimmy

Modeling and stabilization of motorcycle shimmy

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ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Kubota, Tetsuya Yagi, Eiichi System Technology Development Center Kawasaki Heavy Industries Ltd. Hyogo Japan Department of Opt-Mechatronics Wakayama University Wakayama Japan

ISBN: (纸本)9784907764333

It is known that in some conditions, shimmy phenomenon occurs on motorcycles. In this article, shimmy analysis is conducted by the model based on the tire model that delivers the force with lateral deformation. The analysis shows that the motorcycle with excessively heavy load becomes unstable. Then, the model is used to design a stabilizing controller for motorcycle shimmy. The stabilization is verified by the experiment with the unmanned motorcycle produced for the tests without a rider influence. The results show the control based on the model is effective to stabilize motorcycle shimmy. © 2009 SICE.

关键词： Motorcycles

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Improvement of interleaved multiplication algorithm

Improvement of interleaved multiplication algorithm

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1st International Conference on Information Science and Engineering, ICISE2009

作者： Chen, Guanghua Liu, Ming Zhu, Jingming Zheng, Weifeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769538877

An improved modular multiplication algorithm based on the interleaved multiplication is presented in this paper. Carry save addition (CSA), redundant representation, a fast lookup table and a counter register are used to improve this algorithm. Carry save addition and redundant representation are used to replace other additions like carry select addition, carry lookahead addition and so on, because carry propagation brought by those additions can be prevented by carry save addition, and redundant representation can make the arithmetic operations fast without carry propagation. The fast lookup table with only 7 pre-calculated values can minimize the number of additions, and can only be addressed once in one iteration, which not only speed up, but also save area compared with other literatures used lookup tables. The iteration number can be reduced by a counter register being added in this improved method to compute the number of 0 from the most significant bit of one operand like X. Analysis and emulation result shows the area and time complexity (AT) of the improved method is equal or even less than 2n2. ©2009 IEEE.

关键词： Table lookup

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A novel uniplanar ultra-broadband double doubly balanced mixer for high dynamic range applications

A novel uniplanar ultra-broadband double doubly balanced mix...

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European Conference on Microwave

作者： Sung Tae Choi Young Jin Kim Yong Hoon Kim Dong Ho Lee Chae Taek Choi Department of Mechatronics Gwangju Institute of Science and Technology Gwangju South Korea Agency for Defence Development Daejeon South Korea

A novel uniplanar ultra-broadband double doubly balanced mixer (DDBM) is proposed for high dynamic range applications. The proposed mixer is based on three uniplanar dual baluns employing a coplanar waveguide (CPW)-to-coplanar stripline (CPS) T-junction. The proposed mixer is fabricated on a 25 mil-thick alumina substrate using a standard thin film process. The fabricated DDBM has a RF bandwidth of 1 to 26 GHz with a conversion loss ranging from 4.5 to 9.8 dB and a high third-order intercept point of 24 dBm. The measured LO-to-RF and LO-to-IF isolations are better than 14.8 dB and 16.7 dB for the LO frequency from 1 to 26 GHz.

关键词： Dynamic range Impedance matching Radio frequency Bandwidth Coplanar waveguides Substrates Circuits Bonding Wire Stripline

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