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International Conference on Energy and Environment Technology (ICEET)

作者： Xiangyun Liu Junhu Feng Huanxin Chen Xiangwei Zhang School of material and energy Guangdong University of Technology Guangzhou China School of energy and power engineering Huazhong University of science and technology Wuhan China Electronic Control Equipment Factory Dazhong machinery company Taiyuan China School of energy and power engineering Huazhong University of Science and Technology WuHan China School of Mechatronics Guangdong University of technology Guangzhou China

Automobile aerodynamic problems are closely associated with the flows occurring around car. The paper investigates numerically the flow around a car body with different angles of wind velocity to car axis in range of 0~30°. The scale of automobile is 4350 m × 1680 m × 1480 m in length × width × height. The coefficient of flow resistance is defined. Analyzing the result, it can be concluded as follows: The wind angles affect the flow around the automobile strongly. The coefficient of flow resistance increases with increasing wind angles. The wall shear stress on the car increases with increasing the wind angles. The result can provide us with a useful reference for design of the automobiles and for safe running in windy days or windy areas.

关键词： Automobiles Aerodynamics Wind Drag Materials science and technology Immune system Power engineering and energy Stress Fluid dynamics Automotive engineering

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Rotary MR actuators with current less holding torque for a vehicle door assistant

引用

Journal of Physics: Conference Series 2009年第1期149卷

作者： A Wiehe K Voth J Maas Hochschule Ostwestfalen-Lippe – University of Applied Sciences Control Engineering and Mechatronics Liebigstraße 87 D-32657 Lemgo

Improvement of comfort functionalities is an important distinguishing mark for the competitiveness of automotive manufactures. Therefore the utilization of rotary MR actuators offers several new possibilities like an entry assist functionality for example. Beside requirements like a good controllability and reproducibility of torque the actuator must offer a certain holding torque without electrical feeding, in order to rest (fix) the automotive door in any position for a long period of time. For the realisation of an actuator with a current less torque two approaches are developed. The first one deals with permanent-magnets and offers an almost linear control characteristic. The second approach uses magnetic hysteresis for current less torque generation, which results in a plurivalent control characteristic. The main advantage is a an optimized design with respect to space and weigth. The hysteresis behaviour can be compensated by an adequate control algorithm, resulting in an almost linear torque characteristic.

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A model of heat dissipation for MR based brake

引用

Journal of Physics: Conference Series 2009年第1期149卷

作者： A Wiehe V Noack J Maas Hochschule Ostwestfalen-Lippe – University of Applied Sciences Control Engineering and Mechatronics Liebigstraße 87 D-32657 Lemgo

In contrast to conventional brakes actuators based on magnetorheological fluids (MRF) offer an advantage in short term, peak load decelerating. The dissipation of a high amount of energy in a short period of time results in a thermal destruction of conventional brakes. Due to the volume based energy dissipation of MR actuators, instead of the surface based energy dissipation of conventional brakes, the rise of temperature and the distribution of energy shows significant advantages. In this paper a design rule for special peak load MR actuators is derived. Furthermore the simplified model, which is the basis of the design rule, is compared to several simulation models, with different levels of detail.

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Method of signal control of urban public transit priority based on traffic flow detection at expot of upper intersection

引用

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (engineering and Technology Edition) 2009年第SUPPL. 2期39卷 126-130页

作者： Ding, Jian-Mei Wang, Chang-Hong Jiang, Xian-Cai School of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin 150090 China

Aimed at the case that there is no place for opening up bus lanes limited by the road conditions and traffic conditions in the center area of city, in order to carry out the signal control of urban public transit priority on these roads, the traffic flow detectors are setted up the export of upper intersection, the time interval of bus and other big vehicles to go through the stop line of downstream intersection is estimated based on the real-time collection data, a series of bus operation schema at the stop line of downstream intersection are formed by merging each bus' time interval, by comparing with the signal operation schema of arterial direction to determine the green signal extension or red light ahead of arterial direction in order to achieve urban public transit priority. Traffic simulation results show that the mean delay of all vehicles reduce and the bus' delay decrease larger in addition to the mean delay of cross-road vehicle increase.

关键词： Vehicles

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Robotics-mechatronics design competition in Kyushu area, Japan

Robotics-mechatronics design competition in Kyushu area, Jap...

引用

SICE Annual Conference

作者： Taisuke Sakaki Takanori Kiyota Hitoshi Kino Shinichi Sagara Ryuichi Oguro Shunji Moromugi Keiji Imado Hidetaka Ikeuchi Manabu Fukushima Takeshi Ikeda Kanta Aoki Nobuhiro Ushimi Department of Engineering Kyushu Sangyo University Fukuoka Japan Department of Mechanical Systems Engineering University of Kitakyushu Kitakyushu Japan Department of Intelligent Mechanical Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Control Engineering Kyushu Institute of Technology Kitakyushu Japan Department of Computer Science and System Engineering Kyushu Institute of Technology Lizuka Japan Department of Mechanical Systems Engineering Nagasaki University Nagasaki Japan Department of Architecture and Mechatronics Oita University Oita Japan Department of Media Technology Nippon Bunri University Oita Japan Department of Mechanical Engineering Kyushu University Fukuoka Japan Department of Art Kyushu Sangyo University Fukuoka Japan

We describe a unique competition based on the novel concept of robotics and mechatronics products that included evaluation of the products' engineering function and interface design. Seventy-seven students of eleven teams from seven universities in the Kyushu area participated in the competition, whose subject was ldquoHealth care, life supporting and communication or other technical aids for the elderly or *** Many of the plans presented ideas that balanced function and design, showing the results of collaboration among students studying engineering and students studying product design.

关键词： Design engineering Electronic mail mechatronics Educational institutions Senior citizens Service robots Systems engineering and theory Art Educational robots Collaborative work

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Power performance of circular piezoelectric diaphragm generators

引用

中国高等学校学术文摘·机械工程 2008年第4期3卷 434-440页

作者： Kehong TANG Junwu KAN Taijiang PENG Zhigang YANG Guangming CHENG College of Mechanical Science and Engineering Jilin University Changchun 130025 China College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China

Energy generation performance of a piezo-electric generator depends mainly on several elements such as the structural style, boundary conditions, geo-metry parameters, materials, vibration-source frequency, and external load. To obtain the optimal energy-harvest-ing device, the Raleigh method is used to establish the analysis model of circular piezoelectric composite dia-phragms. Simply supported and clamped boundary con-ditions were considered. The relationships between the output power and the structural parameters of piezo-electric composite diaphragms, and the external load res-istance and frequency were shown. Given the correlative material parameters and boundary conditions, the output power, using structural parameters, external load, or vibrating frequency as variables, can be calculated. Simulation results show that there are optimal structural parameters and load for a composite diaphragm to achieve the maximum output power. A piezoelectric dia-phragm generator with given dimensions tends to achieve higher output power under clamped boundary conditions than that under simply supported boundary conditions.

关键词： piezoelectric energy harvesting output power Rayleigh method

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On the role of multimodal communication in telesurgery systems

On the role of multimodal communication in telesurgery syste...

引用

IEEE Workshop on Multimedia Signal Processing

作者： Robert Bauernschmitt Eva U. Braun Martin Buss Florian Frohlich Sandra Hirche Gerhard Hirzinger Julius Kammerl Alois Knoll Rainer Konietschke Bernhard Kubler Rudiger Lange Hermann Mayer Markus Rank Gerhard Schillhuber Christoph Staub Eckehard Steinbach Andreas Tobergte Heinz Ulbrich Iason Vittorias Chen Zhao Clinic of Cardiovascular Surgery German Heart Center Munich Munich Germany Institute of Automatic Control Engineering Technische Universität München Munich Germany German Aerospace Center Institute of Robotics and Mechatronics Oberpfaffenhofen Germany Institute of Media Technology Technische Universität München Munich Germany Institute of Robotics and Embedded Systems Technische Universität München Munich Germany Institute of Applied Mechanics Technische Universität München Munich Germany

Telesurgery systems integrate multimodal communication and robotic technologies to enable surgical procedures to be performed from remote locations. They allow human surgeons to intuitively control laparoscopic instruments and to navigate within the human body. In this paper, we present selected topics on multimodal interaction in the context of telesurgery applications. These are results from the collaborative research project SFB 453 on ldquoHigh-Fidelity Telepresence and Teleactionrdquo which is funded by the German Research Foundation in the larger Munich area. The focus in this paper is on multimodal information processing and communication including simulation of surgical targets in the human body. Furthermore, we present an overview of our advanced multimodal telesurgery demonstrators that provide a comprehensive platform for our collaborative telepresence research.

关键词： Surgery Humans Collaboration Robots Communications technology Communication system control Laparoscopes Instruments Navigation Context

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Tool support for the design of self-optimizing mechatronic multi-agent systems

引用

International Journal on Software Tools for Technology Transfer 2008年第3期10卷 207-222页

作者： Burmester, Sven Giese, Holger Münch, Eckehard Oberschelp, Oliver Klein, Florian Scheideler, Peter Software Engineering Group Department of Computer Science University of Paderborn Paderborn Germany System Analysis and Modeling Group Hasso Plattner Institute University of Potsdam Potsdam Germany Control Engineering and Mechatronics University of Paderborn Paderborn Germany Heinz Nixdorf Institute University of Paderborn Paderborn Germany

Complex technical systems, such as mechatronic systems, can exploit networking as well as the computational power available today to achieve an automatic improvement of the technical system performance at run-time through self-optimization. To realize this vision, appropriate means for the design of such self-optimizing mechatronic systems are required. Well-established techniques and tools for the modeling of cognitive behavior, reflective behavior, and control behavior exist. However, to really enable self-optimization and its full potential, these different aspects have to be safely integrated in a manner that remains comprehensible to the designer. In this article, we present how this required integration has been realized at the semantic level by extending the unified modeling language (UML), and at the tool level by integrating the CAE tool CAMeL and the CASE tool Fujaba real-time tool suite. The presented Mechatronic UML approach supports the design of verifiable, complex, reconfigurable mechatronic systems using the multi-agent system metaphor. © Springer-Verlag 2008.

关键词： Multi agent systems

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Adaptive fuzzy sliding-mode control for direct drive electro-hydraulic servo rocket rudder

Adaptive fuzzy sliding-mode control for direct drive electro...

引用

2008 2nd International Symposium on Systems and control in Aerospace and Astronautics, ISSCAA 2008

作者： Wenhai, Su Jihai, Jiang Institute of Fluid Power Transmission and Control School of Mechatronics Engineering Harbin Institute of Technology 2 Yikuang Street Harbin Heilongjiang 150001 Republic of China China

Aiming at the rapidity control problem of Direct Drive Electro-Hydraulic (DDEH) servo Rocket Rudder, a design method of adaptive fuzzy sliding mode control with friction torque dynamic compensation is presented. The friction torque dynamic compensation method is introduced to enhance the response of the system. The adaptive fuzzy controller is introduced to solve the problem of the uncertain parameter and external disturbances of the system, so the controller can be designed without accurate model. The adaptive law, which is derived of Lyapunov method, guarantees the stability of control system, reduces the high frequency chattering. Simulation results show that the control approach can decrease the tracking error, enhance the system's robustness and attenuate the high frequency chattering in the control signal.

关键词： Lyapunov methods

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A geometric algorithm for symmetric workpiece localization

A geometric algorithm for symmetric workpiece localization

引用

World Congress on Intelligent control and Automation (WCICA)

作者： XuYi Limin Ma Zexiang Li Division of Control and Mechatronics Engineering Harbin Institute of Technology China

This paper introduces a geometric algorithm for symmetric workpiece localization. First, we formulate the localization problem as a geometric problem in the configuration space Q=SE(3)timesR 3n , where SE(3) is the Euclidean group, and n is the number of measurement points to be matched by corresponding home surface points of the workpiece. Then, we compute for the critical points of the objective function. So we derive a geometric formula for the optimal Euclidean transformation in terms of the measurement points and the corresponding home surface points. The corresponding home surface point is given by two nonlinear equations. Each measurement point and its corresponding home surface point nearest to the measurement point are solved in every iterations. For symmetric features, their configuration spaces are identified with the quotation space of SE(3). Finally, based on these results an iterative algorithm for obtaining the complete solution is addressed and the proof is given. Experimental results show the algorithm is more efficient than the variation algorithm, which is an algebraic algorithm.

关键词： Algorithm design and analysis Solid modeling Measurement by laser beam Design automation Convergence Manufacturing Surface finishing

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