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The stress analysis on spur gear meshing simulation

5th International Conference on mechanical and Electrical Technology, ICMET 2013

作者： Li, Zheng Chen, Yang Department of Mechanical Engineering Shanghai Jiao Tong University Shanghai China Department of Industry Dalian Measurement and Control Technology Institute Dalian China

ISBN: (纸本)9783037858349

The gear meshing is a very complicated process due to the nonlinear behaviors during the teeth contact. It is necessary to build a reliable model to simulate gear meshing process which can consider geometry and boundary conditions nonlinear behavior in gear tooth contact analysis. This paper propose a 3D finite element model to simulate the meshing process of a pair of spur gears, and then carry out the gear tooth contact analysis with the consideration of nonlinear behaviors. The results and relevant discussions will indicate and explain some significant phenomena of the gear tooth contact characteristics in gear meshing process. © (2013) Trans Tech Publications, Switzerland.

关键词： Finite element method

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Exponential Stabilization for Linear Systems with Actuator Saturation Via Intermittent control

Exponential Stabilization for Linear Systems with Actuator S...

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第25届中国控制与决策会议

作者： Yijing Wang Weiyan Li Wenlong Yang Zhiqiang Zuo Michael Z. Q. Chen the Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Department of Mechanical Engineering The University of Hong Kong

ISBN: (纸本)9781467355339

The exponential stabilization problem of a class of linear systems with actuator saturation is addressed in this paper. In an approach different from the previous results where the continuous controllers are used all the time, here the periodically intermittent control is proposed to ensure the exponential stability of the closed-loop systems. An exponential stability criterion is suggested using the contractive invariant ellipsoid as an estimate of the domain of attraction. In addition, the exponential convergence rate is explicitly given. The feedback controller can also be designed by regarding the feedback gain as an additional variable. A numerical example is presented to illustrate the effectiveness of our theoretical analysis.

关键词： Exponential Stability, Intermittent control, Actuator Saturation, Domain of Attraction

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Process monitoring based on Kullback Leibler divergence

Process monitoring based on Kullback Leibler divergence

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European control Conference (ECC)

作者： Jiusun Zeng Lei Xie Uwe Kruger Jie Yu Jingjing Sha Xuyi Fu College of Metrology & Measurement Engineering China Jiliang University Hangzhou China Institute of Cyber Systems & Control Zhejiang University Hangzhou China Department of Mechanical and Industrial Engineering Sultan Oaboos University Sultanate of Oman Department of Chemical Engineering McMaster University Hamilton Canada

This article proposes to monitor industrial process faults using Kullback Leibler (KL) divergence. The main idea is to measure the difference between the distributions of normal and faulty data. Sensitivity analysis on the KL divergence under Gaussian distribution assumption is performed, which shows that the sensitivity of KL divergence increases with the number of samples. For non-Gaussian data, a recently proposed kernel method for density ratio estimation is used to estimate the KL divergence. The density ratio estimation method does not involve direct estimation of probability density functions, hence is fast and efficient. For monitoring of non-Gaussian data, the confidence limits are obtained through a window based strategy. Application studies involving a simulation example and an industrial melter process show that the performance of the proposed monitoring strategy is better than the principal component analysis (PCA) based statistical local approach.

关键词： Monitoring Estimation Principal component analysis Kernel Sensitivity Probability density function Educational institutions

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Embedded electroencephalogram processing and control for the actuation of a prosthetic thumb prototype

Embedded electroencephalogram processing and control for the...

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IEEE International Conference on Electro-Information Technology

作者： Alex N. Jensen Amanda J. Clark Nathan T. Sparks Steve Chiu Marco P. Schoen Measurement and Control Engineering Research Center MCERC College of Science and Engineering Department of Electrical Engineering Idaho State University Pocatello ID USA Brigham Young University-Idaho College of Physical Science and Engineering Rexburg ID USA Department of Electrical Engineering MCERC Idaho State University Pocatello ID USA Department of Mechanical Engineering MCERC Idaho State University Pocatello ID USA

Classical control methods for prosthetics have many drawbacks when it comes to controlling smart prosthetics. This paper uses electroencephalogram (EEG) signals, which have many advantages over electromyogram (EMG) signals, including the ability to integrate a robotic opposable thumb in a prosthetic hand. Servo motors are controlled by an embedded processor that responds to predetermined electropotentials that are gathered using an EEG headset. The results are promising and the system proposed is a viable option for controlling a prosthetic hand's thumb.

关键词： Electroencephalography Thumb Prosthetics Electromyography Computers Servomotors Training

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Research on fault prediction method faced to internal combustion engine group based on IOT

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2013年第6 SUPPL.期34卷 183-187页

作者： Xu, Xiaoli Jiang, Zhanglei Liu, Xiuli Long, Zhongjie Chen, Peng School of Mechanical and Vehicle Engineering Beijing Institute of Technology Beijing 100081 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing 100192 China Department of Environmental Science and Engineering Faculty of Bio-Resources Mie University Tsu-shi Mie-ken 514-8507 Japan

Electromechanical system deterioration from stable state to a non-stable state is a process of deterioration changes which are depended on the time series. It is beneficial to carry out safety protection in advance and implement predictive maintenance, and also to prevent accident occurrence by using fault prediction method to reveal the fault feature. A fault prediction method faced to internal combustion engine group based on Internet of Things (IOT) is researched. It's beneficial to improve the operation stability of key equipment group and promote the emerging IOT technology application in equipment maintenance. The fault prediction model mainly includes the system of remote online sample acquisition based on IOT, constructing fault prediction model coupling the physical information and numerical rules information of the mechanical systems, both to reflect the physical nature of the mechanical system, but also reflects the fault indicates numerical rules of the mechanical system. Fault feature is used to predict fault trend in order to ensure safe and stable operation of internal combustion engine group.

关键词： Internal combustion engines

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Development of a novel tympanic temperature monitoring system for GT car racing athletes

Development of a novel tympanic temperature monitoring syste...

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World Congress on Medical Physics and Biomedical engineering

作者： Lee, J.H. Matsumura, K. Yamakoshi, K. Rolfe, P. Tanaka, N. Yamakoshi, Y. Takahashi, K. Kim, K.H. Hirose, H. Yamakoshi, T. Graduate School of Natural Science and Technology Kanazawa University Kakuma-machi Kanazawa-shi Ishikawa 920-1192 Japan School of Mechanical Engineering College of Science and Engineering Kanazawa University Kakuma-machi Kanazawa-shi Ishikawa 920-1192 Japan Department of Automatic Measurement and Control Harbin Institute of Technology 92 West Dazhi Street Nan Gang District Harbin 150001 China Yu.sys Corporation Ishibiki Kanazawa-shi Ishikawa 920-0935 Japan Medical Corporation of Nishidai Orthopedic 1-80-14 Takashimadaira Itabashi-ku Tokyo 175-0082 Japan Department of Electronic Engineering School of Engineering Dankook University 119 Dandae-ro Dongnam-gu Cheonan-si Chungnam 330-714 Korea Republic of Department of Business Administration Kinjo College 1200 Kasama-machi Hakusan-shi Ishikawa 924-0063 Japan

ISBN: (纸本)9783642293047

Motor racing athletes, especially Grand Touring (GT) car racing drivers in the closed-cockpit category, can face lifethreatening situations caused by heat stroke. In this paper, a novel continuous tympanic temperature monitoring system, that could help to reduce this risk, is presented. The system consists of an earpiece containing an infrared-radiation-type tympanic thermometer and a micro-speaker. We validated the reliability of the system for tympanic temperature monitoring in 10 healthy volunteers (21.8 ± 1.0 S.D. years) using a temperature-controlled water bath. In addition, we evaluated the usefulness of the system with 2 professional drivers under real racing conditions in the 2010 SUPER GT International Series. The results showed strong correlation between the infrared-radiation tympanic temperature obtained by the present system and both the direct tympanic temperature (r = 0.994, n = 1119, P

关键词： Monitoring

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Realizability of n-port resistive networks with 2n terminals

Realizability of n-port resistive networks with 2n terminals

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Asian control Conference

作者： Michael Z. Q. Chen Chanying Li Kai Wang Zhiqiang Zuo Minghui Yin Guanrong Chen Department of Mechanical Engineering University of Hong Kong Hong Kong China School of Automation Nanjing University of Science and Technology Nanjing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China Department of Electronic Engineering City University of Hong Kong Hong Kong China

In this paper, we consider the realizability problem of n-port resistive networks containing 2n terminals. A necessary and sufficient condition for any real symmetric matrix to be realizable as the admittance of an n-port resistive network containing 2n terminals is obtained. The condition is based on the existence of a parameter matrix. We then focus on a three-port resistive network containing six terminals. A necessary and sufficient condition is derived for any real symmetric matrix to be realizable as the admittance of a three-port resistive network containing six terminals and at most five positive elements, whose topological structure is properly restricted.

关键词： Symmetric matrices Ports (Computers) Admittance Educational institutions Resistors Joining processes Passive networks

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Rat skin wounds tensile strength measurements in the process of healing

Rat skin wounds tensile strength measurements in the process...

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10th IEEE Jubilee International Symposium on Applied Machine Intelligence and Informatics, SAMI 2012

作者： Živčák, J. Hudák, R. Tóth, T. Department of Biomedical Engineering and Measurement Faculty of Mechanical Engineering Technical University of Košice Slovakia Department of Automation Control and Human Machine Interactions Faculty of Mechanical Engineering Technical University of Košice Slovakia

ISBN: (纸本)9781457701979

The goal of our investigation was to evaluate mechanical properties of the skin wounds during the first seven days of primary healing. We realized two parallel symmetrical skin incision (on the left and right side of the spine) in the general anaesthesia. Rats were divided into 7 groups. We measured tensile strength of the wound in 24, 48, 72, 96, 120, 144 and 168 hours after wounding in every group. After each day of measurement we obtained complex of tensile strength diagrams of wound tensile strength-time dependence. We observed the highest absolute strength increase after 24 hours within 5 days after wounding. In the period between 2nd and 5th day of testing we observed stagnation of the strength, labelled as "plató phase". Next significant strength increase was observed only after 6 days, with following increase of the tensile strength of skin wound. © 2012 IEEE.

关键词： Tensile strength

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RoboGasInspector - A mobile robotic system for remote leak sensing and localization in large industrial environments: Overview and first results

RoboGasInspector - A mobile robotic system for remote leak s...

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1st IFAC Workshop on Automatic control of Offshore Oil and Gas Production, ACOOG 2012

作者： Soldan, Samuel Bonow, Gero Kroll, Andreas University of Kassel Faculty of Mechanical Engineering Department of Measurement and Control Mönchebergstraße 7 34125 Kassel Germany

ISBN: (纸本)9783902661999

In order to automate the routine inspections in large industrial environments a mobile robotic system is being developed in the project RoboGasInspector. The robot's sensor-head consists of different instruments for remote sensing using multiple measurement principles. First results show that passive IR-thermographic imaging can be used to detect leaks in pipes as well as liquid spills on the ground. The measurable effects are the temperature profile disturbance due to expansion of pressured gas and evaporative cooling, respectively. Tunable Diode Laser Absorption Spectroscopy (TDLAS) measurement systems provide for quantitative gas concentration measurements and feature a high sensitivity due to the active measurement principle. On the contrary, TDLAS systems measure just the concentration along a path at a time and require a diffusely reflecting background. Using a Pan-Tilt Unit, objects/areas can be scanned and abnormal gas concentrations can be identified. This contribution introduces the project RoboGasInspector and presents the used measurement technology as well as first results. © 2012 IFAC.

关键词： Remote sensing

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Development of a novel system based on the simultaneous measurement of physiological variables for safer driving and general daily healthcare

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2012年第2期50卷 227-236页

作者： Yamakoshi, Takehiro Matsumura, Kenta Hanaki, Shota Ikarashi, Akira Rolfe, Peter Lee, Jihyoung Yamakoshi, Yasuhiro Hirose, Hajime Yamakoshi, Ken-Ichi Graduate School of Natural Science and Technology Kanazawa University Japan School of Mechanical Engineering College of Science and Engineering Kanazawa University Japan Department of Medical Engineering Aino University Japan Department of Automatic Measurement and Control Harbin Institute of Technology Japan Yu.sys Corporation Japan Department of Business Administration Kinjo College Japan

The long term goal of our research is to develop an in-car health screening instrument, based on a novel approach for physiological measurement, in order to contribute to much-needed efforts aimed at achieving safer driving. We describe here a feasibility study in which a system was constructed to derive cardiac indices non-invasively and simultaneously using a finger cuff. Specifically, the instrument measures blood pressure (BP), pulse rate (PR), normalized pulse volume (NPV) reflecting alpha-adrenergic sympathetic activity, and finger-artery elasticity index (FEI). The instrument's measurement process has two phases:firstly, cuff pressure is maintained at 30 mmHg to measure the NPV and PR;secondly, whilst applying a gradual change in counter-pressure, the BP and FEI are measured by application of the volume-oscillometric method. We tested a prototype instrument in 5 healthy male and female volunteers (age 21, 22, 36, 37, 49 years) during two weeks day-to-day living, including a 33-hour period of total sleep deprivation as physiological challenge. The results indicated that with sleep deprivation there appear to be relatively large physiological changes. In conclusion, the prototype system we have developed has allowed the periodic collection of physiological data in a convenient and expeditious way without any failure, demonstrating the possibility to detect an adverse effect on health. Further investigations will be needed in a larger group of subjects with a variety of real environmental conditions.

关键词： Blood pressure

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