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Application of computer aided tolerance analysis in product design

Hedongli Gongcheng/Nuclear Power Engineering 2009年第SUPPL. 1期30卷 82-85页

作者： Du, Hua National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

This paper introduces the shortage of the traditional tolerance design method and the strongpoint of the computer aided tolerancing (CAT) method, compares the shortage and the strongpoint among the three tolerance analysis methods, which are Worst Case Analysis, Statistical Analysis and Monte-Carlo Simulation Analysis, and offers the basic courses and correlative details for CAT. As the study objects, the reactor pressure vessel, the core barrel, the hold-down barrel and the support plate are used to upbuild the tolerance simulation model, based on their 3D design models. Then the tolerance simulation analysis has been conducted and the scheme of the tolerance distribution is optimized based on the analysis results.

关键词： Product design

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Preface of the 2010 IAENG International Conference on Electrical Engineering special session: design, analysis and tools for integrated circuits and systems

Proceedings of the International MultiConference of Engineer...

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Proceedings of the International MultiConference of Engineers and Computer Scientists 2010, IMECS 2010 2010年 1333-1335页

作者： Man, Ka Lok Mercaldi, Michele Hahanov, Vladimir Prinetto, Paolo Poncino, Massimo MacIi, Alberto Choi, Joongho Li, Wei Schellekens, Michel Popovici, Emanuel Seon, Jong-Kug Rossi, Umberto Fummi, Franco Pravadelli, Graziano Lam, Yui Fai PavLov, Vladimir Patel, Ajay Huang, Jinfeng Vallee, Thierry Boubekeur, Menouer Sokolova, Ana Almerares, Sergio Donno, Monica Cho, Jun-Dong Zahirul Alam, A.H.M. Provan, Gregory Velev, Miroslav N. Uddin, M. Nasir Botchkarev, Alexei Bosnacki, Dragan Hickey, Dave O'Keeffe, Maria Krilavičius, Tomas Pastrnak, Milan Herbert, John Lu, Zhe-Ming Pan, Jeng-Shyang Chang, Chin-Chen Horng, Mong-Fong Chen, Liang Lim, Chee-Peng Tao, Ngo Quoc Deb, Suash Merniz, Salah Valero, Oscar Yi, Yang Woods, Damien Vedrine, Franck Monsuez, Bruno Yen, Kang Matsuura, Takenobu Edwards, R. Timothy Tveretina, Olga Fino, Maria Helena O'Riordan, Adrian Patrick Labiak, Grzegorz Gaur, M.S. Chang, Jian Chung, Yeh-Ching Derezinska, Anna Cho, Kyoung-Rok Zhang, Yong Liutkevičius, R. Zeng, Yuanyuan Vasudevan, D.P. Bukowiec, Arkadiusz Kitsos, Paris Goudarzi, Maziar Dong, Jin Song Bhalla, Ateet Al-Khalili, Dhamin Navabi, Zainalabedin Zinchenko, Lyudmila Anjum, Muhammad Almas Narasimha, Deepak Laxmi Hughes, Danny Tadjouddine, Emmanuel M. Wang, Jun Kumar, A.P. Sathish Jaisankar, N. Mansoor, Atif Hollands, Steven Mohammadi, Siamak Klein, Felipe Westermann, Peter English, Tom Planas, Miquel Moreto Chung, Chelho Chakrabarti, Amlan Lei, Chi-Un Bamakhrama, Mohamed Naik, B. Rajendra Harte, Sean Yin, Alexander Giancardi, Luigi El-Din Mady, Alie Joseph, Arun Khandekar, Prasad D. Pandey, Hari Mohan Bharti, Vishal O'Mullane, Monica Chen, Chen Xi'an Jiaotong University China Liverpool University United Kingdom Kharkov National University of Radio Electronics Ukraine Politecnico di Torino Italy University of Seoul Korea Republic of Fudan University China Tyndall University College Cork Ireland System LSI Lab. LS Industrial Systems R and D Center Korea Republic of STMicroelectronics Italy University of Verona Italy Hong Kong University of Science and Technology Hong Kong Hong Kong International Software and Productivity Engineering Institute United States Intelligent Support Ltd. United Kingdom Philips and LiteOn Digital Solutions Netherlands Netherlands Georgia Southern University Statesboro GA United States University of Salzburg Austria Sung Kyun Kwan University Korea Republic of International Islamic University Malaysia Malaysia Aries Design Automation United States Lakehead University Canada IEEE Canada Board of Directors Canada Eindhoven University of Technology Netherlands Vytautas Magnus University Lithuania Siemens IT Solutions and Services Slovakia Sun Yat-Sen University China National Kaohsiung University of Applied Sciences Taiwan Feng Chia University Taiwan Shu-Te University Taiwan University of Northern British Columbia Canada University of South Australia Australia Vietnamese Academy of Science and Technology Viet Nam C. V. Raman College of Engineering India Mentouri University Constantine Algeria University of Balearic Islands Spain University of Seville Spain CEA France ENSTA France Florida International University United States Tokai University Japan MultiGiG Inc. United States Karlsruhe University Germany Universidade Nova de Lisboa Portugal University of Zielona Gora Poland Malaviya National Institute of Technology Jaipur India Texas Instruments Inc. United States National Tsing-Hua University Taiwan Warsaw University of Technology Poland Chungbuk National University Korea Republic of Shenzhen University China Vytautas Magnus University Kaunas Lithuania Hellenic Open Univ

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Roundness error evaluation based on polar mesh searching algorithm

Roundness error evaluation based on polar mesh searching alg...

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IEEE International Conference on Mechatronics and Automation

作者： Xianqing Lei Jishun Li Yujun Xue Mingde Duan Wei Ma School of Mechantronics Engineering Henan University of Science and Technology Luoyang Henan China Modern Mechanical Design and Transmission System Henan Key of Laboratory Luoyang Henan China

A new method for evaluating roundness error using polar measurement data, which named as polar mesh searching algorithm (PMSA), has been presented in this paper. The principle of the algorithm was that series of polar-coordinate mesh points were collocated around the periphery of the least square circle according to certain rule, the radius of all the measured points were calculated by regarding each mesh point as the ideal center, and the roundness error from minimum circumscribed circle method, maximum inscribed circle method and minimum zone circle method were achieved accurately through comparing these radius. In the paper, the process and steps using the PMSA to solve the roundness error were described in detail and the mathematical formula and program flowchart were given. The simulation and experiment results show that roundness error can be evaluated effectually and accurately by this algorithm.

关键词： Least squares methods Flowcharts

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DATICS-2010: Welcome message from workshop organizers: FutureTech 2010

2010 5th International Conference on Future Information Tech...

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2010 5th International Conference on Future Information technology, FutureTech 2010 - Proceedings 2010年

作者： Man, Ka Lok Mercaldi, Michele Hahanov, Vladimir Prinetto, Paolo Poncino, Massimo MacIi, Alberto Choi, Joongho Li, Wei Schellekens, Michel Popovici, Emanuel Seon, Jong-Kug Rossi, Umberto Fummi, Franco Pravadelli, Graziano Lam, Yui Fai PavLov, Vladimir Patel, Ajay Huang, Jinfeng Vallee, Thierry Boubekeur, Menouer Sokolova, Ana Almerares, Sergio Donno, Monica Cho, Jun-Dong Alam, Ahm Zahirul Provan, Gregory Velev, Miroslav N. Nasir Uddin, M. Botchkarev, Alexei Bosnacki, Dragan Hickey, Dave O'Keeffe, Maria Krilavičius, Tomas Pastrnak, Milan Herbert, John Lu, Zhe-Ming Pan, Jeng-Shyang Chang, Chin-Chen Horng, Mong-Fong Chen, Liang Lim, Chee-Peng Tao, Ngo Quoc Deb, Suash Merniz, Salah Valero, Oscar Yi, Yang Woods, Damien Vedrine, Franck Monsuez, Bruno Yen, Kang Matsuura, Takenobu Timothy Edwards, R. Tveretina, Olga Fino, Maria Helena O'Riordan, Adrian Patrick Labiak, Grzegorz Gaur, M.S. Chang, Jian Chung, Yeh-Ching Derezinska, Anna Cho, Kyoung-Rok Zhang, Yong Liutkevičius, R. Zeng, Yuanyuan Vasudevan, D.P. Bukowiec, Arkadiusz Kitsos, Paris Goudarzi, Maziar Dong, Jin Song Bhalla, Ateet Al-Khalili, Dhamin Navabi, Zainalabedin Zinchenko, Lyudmila Anjum, Muhammad Almas Narasimha, Deepak Laxmi Hughes, Danny Tadjouddine, Emmanuel M Wang, Jun Kumar, A.P. Sathish Jaisankar, N. Mansoor, Atif Hollands, Steven Mohammadi, Siamak Klein, Felipe Westermann, Peter English, Tom Planas, Miquel Moreto Chung, Chelho Chakrabarti, Amlan Lei, Chi-Un Bamakhrama, Mohamed Naik, B. Rajendra Harte, Sean Yin, Alexander Giancardi, Luigi Mady, Alie El-Din Joseph, Arun Khandekar, Prasad D. Pandey, Hari Mohan Xi'an Jiaotong-Liverpool University China Kharkov National University of Radio Electronics Italy Politecnico di Torino Italy University of Seoul China Fudan University Ireland University College Cork Ireland System LSI Lab. LS Industrial Systems R and D Center Korea Republic of STMicroelectronics Italy University of Verona Hong Kong Hong Kong University of Science and Technology Hong Kong Hong Kong International Software and Productivity Engineering Institute United States Intelligent Support Ltd. United Kingdom Philips and LiteOn Digital Solutions Netherlands Netherlands Georgia Southern University Statesboro GA Austria University of Salzburg Korea Republic of Sung Kyun Kwan University Malaysia International Islamic University Malaysia Malaysia Aries Design Automation United States Lakehead University Canada IEEE Canada Board of Directors Canada Eindhoven University of Technology Lithuania Vytautas Magnus University Greece Siemens IT Solutions and Services Slovakia Sun Yat-Sen University China National Kaohsiung University of Applied Sciences Taiwan Feng Chia University Taiwan Shu-Te University Canada University of Northern British Columbia Australia University of South Australia Viet Nam Vietnamese Academy of Science and Technology Viet Nam C. V. Raman College of Engineering India Mentouri University Constantine Spain University of Balearic Islands Spain University of Seville France CEA France ENSTA France Florida International University Japan Tokai University Japan MultiGiG Inc. United States Karlsruhe University Portugal Universidade Nova de Lisboa Poland University of Zielona Gora India Malaviya National Institute of Technology Jaipur India Texas Instruments Inc United States National Tsing-Hua University Poland Warsaw University of Technology Korea Republic of Chungbuk National University China Shenzhen University Lithuania Vytautas Magnus University Kaunas Greece Hellenic Open University Patras Singapore National University of Singapore Sing

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Development of a 6-axis robotic arm controller implemented on a low-cost microcontroller

Development of a 6-axis robotic arm controller implemented o...

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International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information technology, ECTI-CON

作者： Agus Bejo Wanchalerm Pora Hiroaki Kunieda Embedded System and IC Design Research Laboratory Department of Electrical Engineering Faculty of Engineering Chulalongkom University Thailand Kunieda-Isshiki Laboratory Department of Communication and Integrated Systems Graduate School of Science and Engineering Tokyo Institute of Technology Japan

This paper presents a case study of development of a 6-axis robotic arm controller. The robot is powered by a hydraulic pump. The position of each axis can be derived from its potentiometer voltage. At each and every axis, a servo-valve is employed to control a servo motor. Its relative velocity is related to the servo-valve input. With 2 nd order PID controller, a micro-controller commands movements of all axes. The PID inputs are the six voltages from potentiometers and its outputs are the six DC voltages, which command the six servo-valves. A trajectory file is generated by solving the inverse kinematics problem with some (angular to digital value) conversions. A special case; closed-form calculation is developed to solve kinematics problem. With some constraints it only yields one solution. Experiments show that robot follow the given trajectory with acceptable errors.

关键词： Robot control Microcontrollers Robot kinematics Control systems Potentiometers Communication system control Voltage Servomechanisms Servomotors Service robots

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Discrete ordinates method for three-dimensional neutron transport equation based on unstructured-meshes

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中国高等学校学术文摘·能源与动力工程 2008年第2期2卷 179-182页

作者： Haitao JU Hongchun WU Dong YAO Chunyu XIAN School of Energy and Power Engineering Xi'an Jiaotong UniversityXi'an 710049China National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of ChinaChengdu 610041China

A discrete ordinates method for a threedimensional first-order neutron transport equation based on unstructured-meshes that avoids the singularity of the second-order neutron transport equation in void regions was *** finite element variation equation was obtained using the least-squares method.A three-dimensional transport calculation code was *** the triangular-z and the tetrahedron elements were *** numerical results of some benchmark problems demonstrated that this method can solve neutron transport problems in unstructuredmeshes very *** most problems,the error of the eigenvalue and the angular flux is less than 0.3% and 3.0% respectively.

关键词： discrete ordinates method least-squares finite element unstructured-mesh

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Mixing performance analysis for advanced fuel assembly grid

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Hedongli Gongcheng/Nuclear Power Engineering 2008年第3期29卷 1-4+27页

作者： Chen, Wei-Hong Zhang, Hong Zhang, Feng-Lin Hu, Hai-Xiang Hu, De-Yong Chen, Ping Lei, Tao State Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu 610041 China

Fuel assembly grids of pressurized water reactor strengthen the coolant mixing around fuel rod through mixing structure. The size and shape of mixing vane affects the mixing performance and flow resistance. This paper introduces the process and result of grid mixing performance optimizing design. Using CFD software, three dimensional flow field of three grid design schemes are analyzed and compared. The results show that the mixing performance of scheme 3 is better than that of scheme 1 and 2 in terms of the highest fluid temperature and the most difference in temperature. And mixing performance of scheme 1 and 2 is better than that of scheme 3 in terms of typical channel average temperature.

关键词： Pressurized water reactors

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Editorial

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Materials Forum 2008年 33卷

作者： Galea, Steve Chiu, Wingkong Mita, Akira Air Vehicles Division Defence Science and Technology Organisation VIC Australia Department of Mechanical Engineering Monash University Clayton VIC Australia Structural Health Monitoring and Control Laboratory Department of System Design Engineering Keio University Yokohama Japan

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Annual business and news:: Beginning the 31st year of the Journal of Guidance, Control, and Dynamics

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JOURNAL OF GUIDANCE CONTROL AND DYNAMICS 2008年第1期31卷 1-1页

作者： Schmidt, George T. Aeronautics and Astronautics Massachusetts Institute of Technology (MIT) AIAA Institute of Electrical and Electronics Engineers Russian Federation Academy of Navigation and Motion Control Department of Mechanical and Aerospace Engineering and Engineering Mechanics University of Missouri-Rolla(UMR) Lockheed Electronics Company Center for Space Research University of Texas Austin United States Wright Laboratory Eglin Air Force Base UMR AIAA Guidance Navigation and Control Technical Committee American Automatic Control Council Lockheed Martin Aeronautics Company Palmdale CA United States C4ISR and Unmanned Air Vehicle (UAV) Programs for Air Vehicle Sciences and Systems Accreditation Board Engineering and Technology Inc./Aeronautical National Technical Committee on Guidance Navigation and Control Department of Mechanical and Aerospace Engineering University at Buffalo State University of New York (SUNY) AIAA Technical Committee on GN and C Air Vehicles Directorate Air Force Research Laboratory (AFRL) Wright-Patterson Air Force Base Space Access and Hypersonic Vehicle Guidance and Control Group Control Science Center of Excellence AFRL AIAA Technical Committee on Guidance Navigation and Control Department of Mechanical and Aeronautical Engineering University of California (UC) Davis United States Boeing Company Modernized Flight Control System for the Apache Longbow AIAA Institute of Electrical and Electronics Engineers AHS Jet Propulsion Laboratory California Institute of Technology Boeing Company Flight Sciences and Advanced Design Group Guidance Navigation and Control (GN and C) Systems Engineer Distributed Space Systems NASA Goddard Space Flight Center (GSFC) AIAA GN and C Technical Committee Department of Aerospace Engineering and Engineering Mechanics University of Texas Austin United States Institute of Navigation American Astronautical Society AIAA Guidance Navigation (GN and C) and Control Technical Committee Department of Aerospace Engineering Iowa State University Iowa

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Text digital watermarking technology based on graph theory

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Jisuanji Yanjiu yu Fazhan/Computer Research and Development 2007年第10期44卷 1757-1764页

作者： Liu, Dong Sun, Ming Zhou, Mingtian School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610051 China National Key Laboratory of Reactor System Design Technology Chengdu 610041 China

Because of text's properties, it's so difficult to find perfect algorithms of embedding watermark into text documents, when compared with other media. Nowadays, text watermarking technologies is far behind other multimedia watermarking technologies such as images, audios, etc. A novel text digital watermarking technology based on graph theory is presented in this paper. Through changing its topology structures of a character or string, different figures are schemed out, which represent the same semanteme. Then those figures are mapped on graphs of graph theory, and the graphs or their properties should be correctly encoded in order to denote different watermarking information. The mathematic models of embedding and detecting watermarking are also described, and the experimental methods of robustness and visual influence, as well as the relative results are given. Finally, general rules of removing attack on text watermarking system is proposed, and the attack-resisting capability and methods of this text digital watermarking is analyzed in detail. According to the experimentation and analysis, the text watermarking technology has the following advantages: great capacity of watermarking, strong robustness, little visual influence and quite good attack-resisting capability. With this technology, it is more convenient to embed watermark into characters for ideograph languages such as Chinese and Korean, while it is suitable for embedding watermark into strings for alphabetic languages such as English and French.

关键词： Digital watermarking

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