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Integrating matlab and simulink in an advanced engineering mechanics course

Integrating matlab and simulink in an advanced engineering m...

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2004 ASME International mechanical engineering Congress and Exposition, IMECE 2004

作者： Dabney, James B. Ghorbel, Fathi H. Systems Engineering Program University of Houston - Clear Lake Houston TX United States Department of Mechanical Engineering Rice University Houston TX United States

ISBN: (纸本)0791847233

An advanced engineering mechanics course teaches students to analyze and model a variety of dynamical systems using Newtonian and Lagrangian mechanics approaches. The modeling task typically produces nonlinear differential equations that are best solved numerically. In order to prepare students to competently solve these systems numerically, the students must master a suitable programming environment. This mastery is achieved incrementally throughout the semester. This paper describes a successful approach to developing the necessary programming skills, culminating in a course project in which the students model a complex dynamical system and produce a graphical animation allowing visualization of dynamical behavior. The paper also describes two typical course projects that have been successfully completed by advanced undergraduate and beginning graduate students. Copyright 2004 by ASME.

关键词： engineering education

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Strategies to attract information technology students: An extrapolation of worker experiences

Strategies to attract information technology students: An ex...

引用

ASEE 2004 Annual Conference and Exposition, "engineering Researchs New Heights"

作者： Cullinane, Thomas P. Perry, Ronald F. Yanmaz, Baris Department of Mechanical Engineering Northeastern University Boston MA Graduate Information Systems Program Northeastern University Boston MA Northeastern University Boston MA

The predicted dramatic increase in demand for IT workers in the next decade suggests an opportunity for IT educators to establish plans to ramp up to meet these needs. The purpose of this paper is to help educators understand factors that are important to IT workers and that can be influenced by the educational process. The work reported here is part of an NSF grant that explored current IT worker experiences and motivations. Data for the study was collected using a forty-four-item questionnaire sent to currently employed IT workers in the Boston area. Stepwise multiple linear regression was used to relate certain outcome variables to attributes and opinions of the respondents as represented by question item responses. Relationships have been discovered that will help educators craft academic programs and identify potentially successful students in IT. For example, the analysis indicates questionnaire items associated with the challenge presented by an IT profession and family educational backgrounds in technical areas are important outcome predictors, while gender and age are less important.

关键词： Strategic planning

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Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

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IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Lee, Jung-Min Lee, DongHwal An, HeeTae Huh, Nam Kim, Myoung Kook Lee, Man Hyung Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT(Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot. © 2004 IEEE.

关键词： Mobile robots

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Performance analysis of UPS(Ultrasonic Positioning System) using DGPS

Performance analysis of UPS(Ultrasonic Positioning System) u...

引用

IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Kim, Su Yong Lee, Dong Hwal An, Hee Tae Lee, Sang Hun Koh, Young Ho Lee, Man Hyung Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of Department of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

In this paper, the position of a mobile robot using DGPS(Differential GPS) and UPS(UItrasonic Positioning System) is measured and the performance of UPS is analyzed using DGPS. UPS is absolute positioning system using ultrasonic waves and has better performance in low price than the other absolute positioning systems. So in order to evaluate the performance, UPS is compared with the RTK(Real-Time Kinematics) method, which is of the most accurate methods in the DGPS. As a result, the possibility of using UPS can be discussed as pseudolites or pseudo-satellites in the place where GPS is not available. © 2004 IEEE.

关键词： Mobile robots

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Integrated damper and pressure reset for VAV supply air fan control

Integrated damper and pressure reset for VAV supply air fan ...

引用

Technical and Symposium Papers - 2004 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers

作者： Wei, Guanghua Liu, Mingsheng Claridge, David E. Energy Systems Laboratory Texas A and M University College Station TX Department of Mechanical Engineering Texas A and M University College Station TX Architectural Engineering Program University of Nebraska Lincoln NE

This paper presents an integrated damper and pressure reset (IDPR) method for variable air volume (VAV) system fan control. The IDPR method controls the static pressure at a minimum required level while maintaining at least one terminal box damper at full open position. When the entire system is flawless, the fan speed is controlled in a way similar to the terminal regulated air volume (TRAV) method to maintain at least one terminal box damper full open. When system faults exist, however, this control strategy uses less fan power than the TRAV method. The IDPR method can be implemented in both full DDC (direct digital control) systems and hybrid systems, where only the space temperature readings are communicated to the DDC controller at the air-handler level and the terminal boxes are controlled by pneumatic controllers. ©2004 ASHRAE.

关键词： Fans

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Haptic discrimination of perturbing fields and object boundaries

Haptic discrimination of perturbing fields and object bounda...

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator systems (HAPTICS)

作者： V.S. Chib J.L. Patton K.M. Lynch F.A. Mussa-Ivaldi Sensory Motor Performance Program Laboratory for Intelligent Mechanical Systems Biomedical Engineering Northwestern University USA Sensory Motor Performance Program Biomedical Engineering Northwestern University USA Laboratory for Intelligent Mechanical Systems Mechanical Engineering Northwestern University Sensory Motor Performance Program Biomedical Engineering Department of Physiology Northwestern University

Experiments were performed to reveal how humans acquire information about the shape and mechanical properties of surfaces through touch and how this information affects the execution of trajectories over the surface. Subjects were instructed to make reaching movements between points lying on the boundary of a virtual planar disk object of varying stiffness. It was found that subjects' trajectory adaptation was dependent on the stiffness of the object. When the virtual boundary exceeded a threshold stiffness, subjects adapted by learning to produce a smooth trajectory on the object boundary, while at lower stiffness they adapted by recovering their original kinematic pattern of movement in free space. This adaptation suggests the internal representation of two distinct categories through a continuum of force fields: force perturbations and object boundaries. In the first case, the interaction forces are opposed and the trajectory is restored. In the second case, the trajectory is modified so as to reduce the interaction forces.

关键词： Haptic interfaces Humans mechanical factors Shape Biomedical engineering Laboratories Intelligent systems Intelligent sensors mechanical systems Joints

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National science foundation Earthquake engineering Research Centers

National science foundation Earthquake Engineering Research ...

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2001 Structures Congress and Exposition, Structures 2001

作者： Pauschke, Joy Preston, Lynn Division of Civil and Mechanical Systems National Science Foundation 4201 Wilson Boulevard Arlington VA 22230 United States ERC Program Team Division of Engineering Education and Centers National Science Foundation 4201 Wilson Boulevard Arlington VA 22230 United States

ISBN: (纸本)0784405581

In 1997, the National Science Foundation (NSF) funded three Earthquake engineering Research Centers (EERCs) to focus on earthquake hazard mitigation through systems-oriented research, education and outreach, and industrial/practitioner/end user collaboration and technology transfer. Collectively receiving about one third of the total annual funding in NSF's earthquake engineering research portfolio, the three EERCs enable cross-disciplinary, cross-institutional teams of faculty and students to work collaboratively, in partnership with industry, practitioners and other end users, over a long-term period, on science, engineering, and societal research issues related to earthquake hazard mitigation. This paper presents an overview of the key features of the EERCs and their individual and collaborative efforts. © 2004 ASCE.

关键词： Earthquake engineering

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Analysis of UPS (ultrasonic positioning system) using DGPS

Analysis of UPS (ultrasonic positioning system) using DGPS

引用

Annual Conference of Industrial Electronics Society

作者： Su Yong Kim Dong Hwal Lee Hee Tae An Sang Hun Lee Young Ho Koh Man Hyung Lee Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Depatment of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

In this paper, the position of a mobile robot using DGPS (differential GPS) and UPS (ultrasonic positioning system) is measured and the performance of UPS is analyzed using DGPS. UPS is absolute positioning system using ultrasonic waves and has better performance in low price than the other absolute positioning systems. So in order to evaluate the performance, UPS is compared with the RTK (real-time kinematics) method, which is of the most accurate methods in the DGPS. As a result, the possibility of using UPS can be discussed as pseudolites or pseudosatellites in the place where GPS is not available.

关键词： Performance analysis Global Positioning System Robot kinematics Mobile robots Satellites Electronic mail Position measurement Ultrasonic variables measurement Uninterruptible power systems Robot sensing systems

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Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

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Annual Conference of Industrial Electronics Society

作者： Jung-Min Lee Dong Hwal Lee HeeTae An Nam Huh Myoung Kook Kim Man Hyung Lee Departement of Interdisciplinary Program in Mechatronics Pusan National University Susan Korea Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea School of mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT (Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot.

关键词： Satellites Mobile robots Robot kinematics Global Positioning System Orbital robotics Service robots Estimation error Distance measurement Uncertainty Machine vision

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Research on navigation system of an autonomous vehicle using RTK-DGPS

Research on navigation system of an autonomous vehicle using...

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Annual Conference of Industrial Electronics Society

作者： Jae Heon Ryu Yu Shin Chang Gun Hong Park Chun Han Lee Seok Hyun Park Man Hyung Lee Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

This paper describes the development of navigation system for an autonomous ground vehicle at limited area by using RTK-DGPS. Before the autonomous drive, we make map data by using RTK-DGPS that is a reference trajectory for the autonomous vehicle. The navigation system with map data computes the yaw angle of the vehicle by using its present position and next position. And the steering wheel of the vehicle is controlled by using fuzzy logic controller. A prototype of the autonomous vehicle by the navigation method is developed and navigation performance of the system is evaluated. The experimental results show that the navigation system based RTK-DGPS can exactly track the map at the low speed. We expect that this navigation system can be more accurate by augmenting other sensors.

关键词： Navigation Remotely operated vehicles Mobile robots Land vehicles Trajectory Vehicle driving Wheels Fuzzy logic Prototypes Sensor systems

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