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Mechanical Engineering Design Education: Issues and Case Studies最新文献

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A New Approach to Teaching a Mechanical Systems Design Course 机械系统设计课程教学的新方法
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23282
M. Jouaneh
This paper discusses a new approach to teaching a senior-level mechanical systems design course at the University of Rhode Island. The MCE401 class was split into 9 teams, each with four students. Team members were selected to complement their learning styles. To each team, additional 4 students from the URI Business school were added. In the Fall semester, each team selected one of several different, product-oriented design projects or proposed their own project topic subject to certain requirements. The students were asked to perform a patent search, to critique related products, to prepare a marketing study, to propose a design of this product, and to realize their design using a 3-D solid-modeling software. At the end of the Fall semester, groups competed for funding for activities in the following Spring term that included building prototypes of their design, formulating business plans for commercialization, and applying for patent protection. The new proposed format gave students better understanding and exposure to the entrepreneurial process of product design and innovation.
本文讨论了罗德岛大学高级机械系统设计课程的新教学方法。MCE401班被分成9个小组,每个小组有4名学生。团队成员的选择是为了配合他们的学习风格。每支队伍又增加了4名来自URI商学院的学生。在秋季学期,每个团队从几个不同的、以产品为导向的设计项目中选择一个,或者根据一定的要求提出自己的项目主题。学生们被要求进行专利检索、评论相关产品、准备市场研究、提出该产品的设计方案,并使用三维实体建模软件实现他们的设计。在秋季学期结束时,小组为下一个春季学期的活动竞争资金,包括建立他们的设计原型,制定商业化的商业计划,以及申请专利保护。新提议的形式使学生更好地理解和接触到产品设计和创新的创业过程。
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引用次数: 0
Capstine Design Projects for Mechatronic Design in Mechanical Engineering Department 机械工程部机电一体化设计项目
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23285
A. Erden
The current paper describes the minor program in mechatronics engineering developed at the Middle East Technical University. The paper gives the main structure of the program with a discussion on the design of the new courses in mechatronics. Sample project topics are also given for the mechatronics design courses. Emphasis is placed on the design features of the mechatronics courses.
本文介绍了中东技术大学在机电工程专业开设的副修课程。本文给出了程序的主要结构,并对机电一体化新课程的设计进行了探讨。在机电一体化设计课程中也给出了样例项目主题。重点放在机电一体化课程的设计特点上。
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引用次数: 0
Failure Analysis and Redesign of Some Import Motor-Driven Devices of Valve 部分进口阀用电机驱动装置失效分析与再设计
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23298
Jiancheng Zhang, Entao Zhou, Shichang Zhou, Guodong Li, Peng Liu
Combining with the failure analysis of a class of import motor-driven devices of valve and the design of new kinds, several problems worth noticing in the design of motor-driven devices of valve have been discussed. These are the failure analysis and the redesign of changeover mechanism between manual operating and motor driving, the redesign of the setting way for valve opening, the reform of the measurement of transmission way for valve opening, and the selections of the parameters about velocity and force of the device. Based on these analyses, redesigned motor-driven devices of valve have been successfully applied in industry. The conclusions obtained have certain referential values to related research.
结合某进口阀门电机驱动装置的失效分析和新型阀门电机驱动装置的设计,探讨了阀门电机驱动装置设计中应注意的几个问题。进行了失效分析和手动驱动与电机驱动转换机构的重新设计,重新设计了阀门开度设定方式,改革了阀门开度传动方式的测量方法,并对装置的速度和力参数进行了选择。在此基础上,重新设计的阀门电机驱动装置已成功应用于工业生产。所得结论对相关研究具有一定的参考价值。
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引用次数: 0
Anti-Hair Snare Pool Drain Cover 防毛网罗池排水盖
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23293
R. Barnett, Peter J. Poczynok
A drain cover for swimming pools, spas and hot tubs has been designed which addresses eight hazards associated with conventional drain systems. This new drain cover, illustrated in Figure 1, eliminates hair entanglement, child evisceration and finger entrapment as well as minimizing body entrapment. Furthermore, its design and construction provide effective countermeasures against vandalism, broken drain covers, missing drain covers and structural deterioration due to environmental antagonists. Additional features unrelated to safety include a universal fastening system which adapts the cover to all circular main drains available in the United States. Also, the drain cover is an order of magnitude stronger than its competitors and has a safe flow rate that is 37% greater than its nearest competitor’s. The product has been manufactured using a PVC material that is the most resistant formulation currently known for counteracting the effects of ultraviolet radiation and chlorine and other chemicals typically found in pools. This paper presents an anatomy of the product’s development.
游泳池、水疗中心和热水浴缸的排水盖设计解决了与传统排水系统相关的八种危害。这种新的排水盖,如图1所示,消除了头发缠结、儿童内脏和手指夹住,并最大限度地减少了身体夹住。此外,它的设计和建造提供了有效的对策,防止故意破坏,漏盖破损,漏盖缺失和由于环境拮抗剂造成的结构恶化。与安全无关的其他功能包括一个通用紧固系统,该系统可使盖子适应美国所有圆形主排水管。此外,排水盖比其竞争对手强一个数量级,其安全流量比最接近的竞争对手高37%。该产品使用PVC材料制成,这是目前已知的最耐紫外线辐射、氯和其他通常在游泳池中发现的化学物质的影响。本文对该产品的开发进行了剖析。
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引用次数: 1
University - National Laboratory Collaboration on MEMS Design Education 大学-国家实验室MEMS设计教育合作
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23290
M. Kilani, P. Galambos, Y. Haik, Ching-Jen Chen
The paper describes the FAMU-FSU College of Engineering approach in educating graduate students in MEMS technology. The approach is based on a collaboration project between the Florida Agricultural and Mechanical University - Florida State University College of Engineering (FAMU-FSU COE) and Sandia National Laboratories (SNL). The project aims at developing a line of electrostatically and magnetically actuated surface micromachined pumps. The paper describes our experience in this collaboration program and illustrates the educational aspects of SNL MEMS design tools. The paper also describes the micropump designs developed in the first phase of the project. The pumps are being fabricated at this time. Results related to performance will be presented at a later time. However, an overview of the work to be done in the next phase is also presented.
本文介绍了FAMU-FSU工程学院在MEMS技术方面的研究生教育方法。该方法基于佛罗里达农业机械大学-佛罗里达州立大学工程学院(FAMU-FSU COE)和桑迪亚国家实验室(SNL)之间的合作项目。该项目旨在开发一系列静电和磁力驱动的表面微机械泵。本文描述了我们在这个合作项目中的经验,并说明了SNL MEMS设计工具的教育方面。本文还介绍了该项目第一阶段开发的微泵设计。泵目前正在制造中。有关表现的结果将于稍后公布。不过,本文还概述了下一阶段要完成的工作。
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引用次数: 1
Functional Design Tree for Mechatronic Projects in Mechanical Engineering Design Course 机械工程设计课程中机电一体化项目的功能设计树
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23286
Meltem Korkmazel, A. Erden
The functional approach utilizes a ‘Functional Design Tree’, which is a decomposition hierarchy of functions involving sub-functions of an engineering system at various levels of resolution. Use of functional approach in the design of mechatronic systems is investigated in the senior level mechanical engineering design projects. A survey is conducted on the senior mechanical engineering students after an engineering design course. It is attempted to find out whether the students followed the systematic design approach, and to what extent they used the functional design tree. The results of the survey are presented and evaluated in the paper, and some conclusions are derived for possible outcomes of the survey.
功能方法利用“功能设计树”,这是一个功能分解层次结构,涉及工程系统在不同分辨率水平上的子功能。在高级机械工程设计项目中,探讨了功能方法在机电系统设计中的应用。对工程设计专业高年级机械工程专业学生进行了调查。试图找出学生是否遵循了系统设计方法,以及他们在多大程度上使用了功能设计树。本文对调查结果进行了介绍和评价,并对调查可能产生的结果得出了一些结论。
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引用次数: 0
Evaluation of a Failure in a Chlorine Production Facility 氯气生产设备故障的评估
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23297
S. Andrew, R. Caligiuri, L. E. Eiselstein, T. K. Parnell
A process upset at a chlorine production facility resulted in a release that forced the partial evacuation of a nearby town. Investigations revealed that the events commenced with the failure of a shell and tube heat exchanger (liquefier) used to condense chlorine gas. Post-incident inspections revealed a cloth at the liquefier coolant inlet that accelerated the flow in that region, causing certain tubes to be breached. As a result, the water-based brine liquefier coolant was entrained in the chlorine process stream, forming a highly acidic oxidizing mixture. This corrosive mixture then flowed to the chlorine storage tanks destroying an elbow in the tank inlet piping and rendering the tank shut-off tank valve ineffective, thus allowing chlorine to vent into the atmosphere. This paper discusses the multi-disciplinary approach used to investigate this incident. In particular, this paper discusses the detailed physical inspections performed, the finite element analyses used to determine the flow conditions, and the corrosion testing conducted to evaluate the failure.
氯气生产设施的一个过程发生故障,导致泄漏,迫使附近城镇的部分居民撤离。调查显示,事故起因是用于冷凝氯气的管壳式热交换器(液化器)发生故障。事故发生后的检查发现,液化器冷却剂进口处的一块布加速了该区域的流动,导致某些管道破裂。结果,水基卤水液化器冷却剂被夹带在氯工艺流中,形成高酸性氧化混合物。然后,这种腐蚀性混合物流入氯储罐,破坏了储罐入口管道中的弯头,使储罐关闭罐阀失效,从而使氯排放到大气中。本文讨论了用于调查这一事件的多学科方法。特别是,本文讨论了所进行的详细物理检查,用于确定流动条件的有限元分析以及用于评估失效的腐蚀测试。
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引用次数: 0
Development of Undergraduate Mechatronics Course in the School of Mechanical Engineering at Georgia Tech 佐治亚理工学院机械工程学院本科机电一体化课程的发展
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23284
I. C. Ume, A. Kita
As the field and applications of Mechatronics grow, engineering education must grow with it to meet the changing needs of students and industry. How to teach Mechatronics continues to be an open area for discussion. The subject is interdisciplinary and it is continuously changing. This presentation focuses on the structure and growth of the undergraduate Mechatronics courses in the Woodruff School of Mechanical Engineering at Georgia Tech. The goal is to provide students with a fun, hands-on, challenging, project based and collaborative learning approach to mechatronics education. An overview of the course and the laboratory experiences is presented. Student projects are included to highlight the topics tackled in the course.
随着机电一体化领域和应用的发展,工程教育必须随之发展,以满足学生和行业不断变化的需求。如何教授机电一体化仍然是一个开放的讨论领域。这门学科是跨学科的,而且是不断变化的。本演讲的重点是佐治亚理工学院伍德拉夫机械工程学院机电一体化本科课程的结构和发展。目标是为学生提供一个有趣的、动手的、具有挑战性的、基于项目的和协作的机电一体化教育学习方法。本课程概览及实验经验呈现。学生专题包括突出在课程中处理的主题。
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引用次数: 0
Wilbur and Orville Wright and the Evolution of Efficient Aircraft Propellers 威尔伯和奥维尔赖特和高效飞机螺旋桨的演变
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23295
R. Ash, S. Miley, D. Landman, Kenneth W. Hyde
Four Wright brothers’ propellers have been carefully reproduced by The Wright Experience for the purpose of measuring their performance using modern instrumentation. Reproductions of a 1903 Flyer propeller, a 1904 ‘Le Mans’ propeller, and two circa 1910 ‘bent end’ propellers have been manufactured, duplicating materials, construction and dimensional geometry. As evidenced by the correlation between static thrust measurements reported originally by the Wright brothers and our recent measurements in Old Dominion University’s Langley Full Scale Tunnel, the propeller reproductions match the static thrust performance of the original propellers to within experimental accuracy. Using modern instrumentation, it has been possible to measure the overall performance of these propeller reproductions covering their full speed ranges. Our tests have shown that the 1903 Wright propeller had a peak efficiency greater than 80 percent (Wilbur appears to have estimated its efficiency to be 66 percent) and the 1904 and 1910 propellers had peak efficiency levels approaching 90 percent. Not only did the Wright brothers’ propellers exhibit systematic increases in static thrust, but their propeller designs were extraordinary because they produced efficiencies approaching the levels found on modern-day human-powered flying machines. Our measurements have shown that the Wright brothers’ use of large-diameter, slowly rotating propellers enabled them to achieve propulsive efficiencies that were unsurpassed for nearly 20 years.
莱特兄弟的四个螺旋桨被莱特经验仔细地复制,目的是用现代仪器测量它们的性能。1903年的Flyer螺旋桨、1904年的勒芒螺旋桨和两个1910年左右的弯尾螺旋桨的复制品已经制造出来,复制了材料、结构和尺寸几何形状。正如莱特兄弟最初报告的静态推力测量与我们最近在老道明大学兰利全尺寸隧道测量的相关性所证明的那样,螺旋桨复制品与原始螺旋桨的静态推力性能相匹配,达到实验精度。使用现代仪器,已经有可能测量这些螺旋桨复制品的整体性能,覆盖其全速范围。我们的测试表明,1903年莱特螺旋桨的峰值效率大于80%(威尔伯似乎估计其效率为66%),1904年和1910年螺旋桨的峰值效率水平接近90%。莱特兄弟的螺旋桨不仅系统地增加了静态推力,而且他们的螺旋桨设计也非同寻常,因为它们产生的效率接近现代人力飞行器的水平。我们的测量表明,莱特兄弟使用的大直径、缓慢旋转的螺旋桨使他们实现了近20年来无人能及的推进效率。
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引用次数: 0
Portable Power in the Backcountry: Design and Development of a Modular Water Heater 野外便携式电源:模块化热水器的设计与开发
Pub Date : 2001-11-11 DOI: 10.1115/imece2001/de-23294
Robert C. Beckius, M. Powell, S. Hong
With a growing number of outdoor enthusiasts becoming increasingly dependent on electronic devices such as GPS units, cellular telephones, and palm-sized computers, the need exists for a lightweight, field-maintainable electronic power source. Since batteries are neither lightweight nor environmentally friendly, the outdoor enthusiast’s proclaimed advocacy of “environmental awareness” furthers this necessity. As a result, there is a strong desire on the part of the outdoor community to have alternative methods for generating portable power. This paper describes the development of a device capable of producing up to 10 watts of electric power by converting thermal energy into electric energy. This is achieved by placing a bismuth-telluride thermoelectric module between a highly efficient heat exchanger and an integrated cold-water reservoir. In addition to thermal efficiency and eliminating the user’s dependency on batteries: size, weight, and system volume were also critical design specifications. Design efforts have resulted in a pocket-sized, multi-use device, which can be used as a power generator, water heater, or distillation unit. The unit has also been designed to work with equipment already possessed by most outdoor enthusiasts. This paper discusses the design challenges and novel solutions encountered during the successful development of the unit.
随着越来越多的户外爱好者越来越依赖电子设备,如GPS装置、蜂窝电话和手掌大小的电脑,需要一种轻便的、现场可维护的电子电源。由于电池既不轻便也不环保,户外运动爱好者宣称的“环保意识”的倡导进一步推动了这种必要性。因此,户外社区有一种强烈的愿望,希望有替代方法来产生便携式电力。本文描述了一种能够通过将热能转化为电能而产生高达10瓦电力的装置的开发。这是通过在高效热交换器和集成冷水储存器之间放置一个碲化铋热电模块来实现的。除了热效率和消除用户对电池的依赖之外,尺寸、重量和系统体积也是关键的设计规格。设计上的努力已经产生了一个口袋大小的、多用途的装置,它可以用作发电机、热水器或蒸馏装置。该设备还被设计成与大多数户外爱好者已经拥有的设备一起使用。本文讨论了该装置在成功开发过程中遇到的设计挑战和新颖的解决方案。
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引用次数: 0
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Mechanical Engineering Design Education: Issues and Case Studies
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