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2002 ASEE Annual Conference and Exposition: Vive L'ingenieur

作者： Liou, Frank Allada, Venkat Leu, Ming Mishra, Rajiv Okafor, Anthony Agrawal, Ashok University of Missouri Rolla St. Louis Comm. Coll. - Fl. V. Mfg. Engineering Education Program UMR Eng. and Technology Department St. Louis Community College NSF Halliburton Found. Funded S.M.D. UMR Intgd. Prod. Devmt. and Mfg. Department of Mechanical Engineering UMR Metallurgical Engineering Department UMR School of Mines and Metallurgy Mfg. Eng. Educ. Executive Committee UMR Intelligent Systems Center Materials Research Center UMR Dept. of Mechanical Engineering UMR BSME-Manufacturing Option Program Dept. of Mechanical Engineering UMR Intelligent Systems Center UMR

An innovative product-oriented manufacturing curriculum is discussed. It enhance manufacturing degree programs at the University of Missouri-Rolla (UMR) and St. Louis Community College at Florissant Valley (FV). The project will impact UMR's two BS degree option programs in manufacturing and MS degree programs in manufacturing and FV's manufacturing engineering and technology programs. An integrative and collaborative manufacturing program is established to reinforce and sharpen critical competencies of students. The project course will provide students with the experience of integrating the technical knowledge they have learned from various other courses.

关键词： Curricula

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Fundamental techniques of mobile robot for inspection of CAS in oil tanker

Fundamental techniques of mobile robot for inspection of CAS...

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9th IASTED International Conference on Control and Applications, CA 2007

作者： Chang, Woo Son Seung, Heui Lee Seok, Jo Go Min, Cheol Lee Mechanical and Intelligent Systems Engineering Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of Interdisciplinary Program in Mechatronics Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of Division of Mechanical Engineering Dongeui Institute of Technology Yangji5Ro Busanjin-gu Busan Korea Republic of School of Mechanical Engineering Pusan National University Jangjeon 2-dong Geumjeong-gu Busan Korea Republic of

ISBN: (纸本)9780889866652

It is dangerous that a technician the inner parts of an oil tanker for defects and conditions because of many harmful gases, complex structures, etc. However, these inspections are necessary to many oil tankers of old years. In this reason, we proposed the fundamental techniques of mobile robot for inspection of CAS in oil tanker. The developed CAS inspection mobile robot has four modules, a measurement module of oil tanker's thickness, a corrosion inspection module, a climbing module of the surface on a wall, and a monitoring module. In order to getting over at a right angled path, the driving control algorithm was developed. And, magnetic wheels were used to move the surface of a wall. This study constructed a communication network (Bluetooth) and the monitoring program to operate the developed mobile robot from remote sites. In order to evaluate the inspection ability, the experiments using developed mobile robot have been conducted.

关键词： Mobile robots

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Motion Measurement Methods for Nonlinear Analysis of Electrostatic MEMS Resonators 20

Motion Measurement Methods for Nonlinear Analysis of Electro...

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20th International Conference on Smart Technologies, EUROCON 2023

作者： Ghommem, Mehdi Alattar, Basil Lherbette, Michael Elhady, Alaaeldin Abdel-Rahman, Eihab American University of Sharjah Department of Mechanical Engineering Sharjah26666 United Arab Emirates Mechatronics Graduate Program American University of Sharjah Sharjah26666 United Arab Emirates SmarAct Metrology Rohdenweg Oldenburg Germany Systems Design Engineering University of Waterloo Waterloo Ontario Canada

ISBN: (纸本)9781665463973

In this paper, we compare two measurement techniques to analyze the dynamic response of a MEMS resonator, made of a microcantilever beam, that is electrostatically actuated via a side electrode. The first method is based on a combination of Michelson interferometry, knife-edge analysis, and stroboscopic imaging, and is used to dissect the in-plane and out-of-plane motions of the resonator. The second approach follows the motion-induced current method and is based on a transduction mechanism that converts the movement of the resonator to a current signal. The third harmonic of said current is directly related to the in-plane motion of the resonator. Motion-induced current measurements enable the detection of the nonlinear dynamics associated with the motion of the resonator when actuated with high excitation voltages. The optical and electrical measurements show similar nonlinear features in terms of the location of the cyclic-fold bifurcation in the parameter space and the hysteretic region associated with it. These dynamic features can be exploited for sensing purposes. © 2023 IEEE.

关键词： Interferometry

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A guideline for parameter design of body surface laplacian electrodes and its application in EGG detection

A guideline for parameter design of body surface laplacian e...

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2005 27th Annual International Conference of the engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： He, Feng Li, Gang Lin, Ling Besio, Walter G. Lu, Stephen C.-Y. Inspiring Technical Laboratory College of Precision Instruments and Opto-Electronics Engineering Tianjin University Tianjin 300072 China Biomedical Engineering Program Center for Biomedical Engineering and Rehabilitation Science Louisiana Tech University LO United States Dept. of Aerospace and Mechanical Engineering Computer Science and Industrial and Systems Engineering University of Southern California CA 90089-1453

ISBN: (纸本)0780387406

The influence of dimension parameters on the performance of Body-surface Laplacian electrodes is studied in this paper. Some rules about the parameter optimization design are presented. The investigation suggests that the effective radius b should be equal to the inner radius of the ring electrode in order to reduce the relative error. Besides, in the presence of weak bioelectrical signals, reasonably increasing b would be helpful to improve SNR. Furthermore, an evaluation method based on these principles is prompted, as an instance of which, feasibility of introducing Surface Laplacian technique into EGG exploration is discussed. © 2005 IEEE.

关键词： Product design

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Analyzing the Implications of New Technologies to the Management of Operations – Protocol Proposal and Application Illustration

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Procedia Manufacturing 2019年 39卷 904-912页

作者： Paulo Henrique Brunheroto Cassiano Souza Beller Fernando Deschamps Manufacturing Engineering Graduate Program Department of Mechanical Engineering Federal University of Parana Curitiba PR Brazil Industrial and Systems Engineering Graduate Program Polytechnic School Pontifícia Universidade Católica do Paraná Curitiba PR Brazil

The increasing adoption of new automation and information technologies are transforming production systems into cyber-physical systems (CPS). Although consulting companies have developed management frameworks to better characterize the implications of these technologies to how operations are managed, mainly focusing on new business models, efficiency, and effectiveness, the real impacts on decision areas (e.g., quality management) and performance objectives (e.g., flexibility) are still unclear. How are management systems being transformed? Are new managerial approaches emerging that address the particularities of new technologies? What are the critical success factors for conducting this transformation? To address these questions, a more systematic approach needs to be undertaken. This paper contributes to this by presenting a protocol to be used in systematic studies of the implications of the adoption of new technologies to the management of operations, and by illustrating its application to the analysis of the adoption of a cognitive vision system in an automotive manufacturer primarily deployed for improving product quality. The analysis protocol is based on Pettigrew’s dimensions of context, content, and process for change initiatives and is further subdivided into information requirements, variables to be analyzed and its potential sources of data. The case shows that the application of the protocol was able to reveal that besides expected effects on quality and productivity, new forms of interaction among workers and between workers and supervisors emerged that need further investigation. From the results of the case, future applications of the protocol are discussed.

关键词： management of operations transformation quality management cognitive vision system

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Experiential learning in a fluid flow class via take-home experiments

Experiential learning in a fluid flow class via take-home ex...

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113th Annual ASEE Conference and Exposition, 2006

作者： Cimbala, John Pauley, Laura Zappe, Sarah Rzasa Hsieh, Meng-Fen Pennsylvania State University United States Department of Mechanical Engineering Penn State University University Park United States Department of Engineering Education United States Schreyer Institute for Teaching Excellence Penn State University United States Instructional Systems Program PA United States

This paper describes the development and assessment of a pump flow take-home experiment that was implemented in an introductory junior-level fluid mechanics course in Fall 2005. The takehome experiment, along with appropriate instructions, is assigned as homework. Students borrow the equipment from the department's equipment room, and perform the experiment either at home or in the student lounge or student shop work area. The experimental apparatus consists of a bucket, tape measure, submersible aquarium pump, tubing, measuring cup, and extension cord. Students connect the tube to the pump outlet, submerge the pump in water, and measure the volume flow rate produced at various outflow elevations. They record and plot volume flow rate as a function of outlet elevation, and compare with the manufacturer's pump performance curve (head versus volume flow rate). The homework assignment includes an online pre-test and posttest to assess the change in students' understanding of the principles of pump performance. The results of the assessment support a significant learning gain following the completion of the takehome experiment. These results and analysis of student perception data collected via an online survey embedded in the homework assignment are discussed. © American Society for engineering Education, 2006.

关键词： engineering education

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Modular Safety-Critical Control of Legged Robots

arXiv

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arXiv 2023年

作者： Tosun, Berk Samur, Evren Graduate Program in Systems and Control Engineering Bogazici University Istanbul Turkey Department of Mechanical Engineering Bogazici University Istanbul Turkey

Safety concerns during the operation of legged robots must be addressed to enable their widespread use. Machine learning-based control methods that use model-based constraints provide promising means to improve robot safety. This study presents a modular safety filter to improve the safety of a legged robot, i.e., reduce the chance of a fall. The prerequisite is the availability of a robot that is capable of locomotion, i.e., a nominal controller exists. During locomotion, terrain properties around the robot are estimated through machine learning which uses a minimal set of proprioceptive signals. A novel deep-learning model utilizing an efficient transformer architecture is used for the terrain estimation. A quadratic program combines the terrain estimations with inverse dynamics and a novel exponential control barrier function constraint to filter and certify nominal control signals. The result is an optimal controller that acts as a filter. The filtered control signal allows safe locomotion of the robot. The resulting approach is generalizable, and could be transferred with low effort to any other legged system. Copyright © 2023, The Authors. All rights reserved.

关键词： Robots

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Enhancement and Optimization of the Propulsion System Modules of Unmanned Aerial Vehicles

Enhancement and Optimization of the Propulsion System Module...

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2024 Asia Conference on Electronic Technology, ACET 2024

作者： Shiau, Y.R. Fang, J. Huang, Y.C. Department of Industrial Engineering and Systems Management Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung Taiwan Department of Aerospace and Systems Engineering Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung Taiwan Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung Taiwan

ISBN: (纸本)9781510681361

Unmanned aerial vehicles (UAVs) are widely used in various industries. The present study focused on the optimization of the configuration of the vertical electric ducted fans (EDFs) of UAVs to enhance the vertical takeoff and landing (VTOL) performance of UAVs, improve the configuration of their propulsion system, address the potential risk of exposed propellers, and reduce the space required between the fluid channel and the outlet in horizontal EDFs. A UAV aircraft module with a vertical EDF configuration was designed, following which structural analysis and flow field analysis were conducted using Ansys. The results of these analyses indicate that the overall flow of the designed module is smooth and stable without vortex generation and that the inlet and outlet air velocity performance of this module is excellent. The lift parameters of the rotor groups of the designed module are identical to each other;thus, the flight stability of the UAV in the air can be maintained, and the requirements for optimized design can be met. This study makes two contributions to the literature. First, the structural module of a vertical EDF propulsion system was proposed with an encapsulated impeller set hidden inside the vehicle structure to reduce the risk of propeller exposure. Second, the configuration of vertical EDF compared to the horizontal configuration shortens the airflow channel, which helps to stabilize the wind speed at the outlet, thereby increasing lifting capacity and propulsion efficiency. © 2024 SPIE.

关键词： Propellers

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Hardware particle swarm optimization based on the attractive-repulsive scheme for embedded applications

Hardware particle swarm optimization based on the attractive...

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2010 International Conference on Reconfigurable Computing and FPGAs, ReConFig 2010

作者： Muñoz, Daniel M. Llanos, Carlos H. Dos S. Coelho, Leandro Ayala-Rincón, Mauricio Department of Mechanical Engineering Automation and Control Group/GRACO University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGPES Pontifical Catholic University of Parana Curitiba Parana Brazil Department of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9780769543147

Particle Swarm Optimization (PSO) algorithms have been proposed to solve engineering problems that require to find an optimal point of operation. However, the PSO algorithm suffers from premature convergence and high elapsed time when solving multimodal and large scale engineering problems. This problem becomes an evident drawback for embedded applications in which the microcontrollers often operates at low computational capacity. This paper proposes a hardware implementation of a parallel self-adaptive PSO algorithm based on an attractive-repulsive scheme and using the efficient floating-point arithmetic which performs computations with large dynamic range and high precision. The parallel capabilities of the PSO are exploited by implementing parallel particles directly in hardware in order to decrease the running time. In addition, the attractive-repulsive technique avoids the premature convergence problem by self-adapting the swarm behavior according to its diversity. Synthesis and simulation results for benchmark test problems were performed, demonstrating the correctness of the proposed architectures. Finally, an elapsed time comparison between the hardware and software implementations shows the suitableness of the proposed architecture for embedded applications. © 2010 IEEE.

关键词： Global optimization

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Characterization of Fluoride-added Hydroxyapatite Derived from Eggshells for Dental Application 15

Characterization of Fluoride-added Hydroxyapatite Derived fr...

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15th Biomedical engineering International Conference, BMEiCON 2023

作者： Uthayaphamornwat, Vilasinee Khantachawana, Anak Kitiwan, Mettaya Srirussamee, Kasama Tunthawiroon, Phacharaphon School of Engineering Department of Biomedical Engineering Bangkok10520 Thailand Faculty of Engineering Department of Mechanical Engineering Bangkok10140 Thailand Biological Engineering Program Faculty of Engineering Bangkok10140 Thailand School of Science Department of Physics Bangkok10520 Thailand Devices and Systems for Energy and Environment Research Unit School of Science Bangkok10520 Thailand School of Engineering Department of Industrial Engineering Bangkok10520 Thailand

ISBN: (纸本)9798350345247

Hydroxyapatite (HA) is one of the potential biomaterials used for treating dental defects. It can be incorporated with fluoride to enhance its anti-caries properties, though other properties could be dependent on processing technique. Hence, this study aims to characterize the influence of sintering on the properties of fluoride-added HA derived from eggshells. FTIR and XRD techniques are used to characterize the chemical and crystal structures of the samples, whilst dissolution test is carried out to characterize material degradation in the acidic environment. The results show that sintering increased the crystallinity in both HA and fluoride-add HA (F-HA) samples, which corresponds with the enhanced stability during the dissolution test. Moreover, it is also found that the addition of fluoride could further stabilize the material structure, though the impurities found in all the samples still need to be minimized. These findings suggest that sintering and fluoride addition could potentially enhance anti-caries properties of eggshell-derived HA, which could be beneficial for dental application in future subject to further process optimization and analysis. © 2023 IEEE.

关键词： Hydroxyapatite

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