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Relevant bibliographies by topics / Electromechanical Engineering – Department of Electromechanical Engineering

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Academic literature on the topic 'Electromechanical Engineering – Department of Electromechanical Engineering'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Electromechanical Engineering – Department of Electromechanical Engineering"

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Topalbekiroğlu, M., A. Kirecci, and L. Canan Dülger. "A Study of Weaving ‘Turkish Knots’ in Handmade Carpets with an Electromechanical System." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 219, no. 5 (2005): 343–47. http://dx.doi.org/10.1243/095965105x33482.

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To form a Turkish knot in a handmade carpet, a study for a computer-controlled prototype loom and its drive system has been presented. The mechanisms involved in the prototype are described separately and the design considerations for each mechanism are given with the function requirements needed. The control of the knotting system is achieved with the actuators applied. The research on the subject is still continuing at the Department of Textile Engineering, University of Gaziantep.

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Egan, I., J. M. Ritchie, and P. D. Gardiner. "Measuring performance change in the mechanical design process arena." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 219, no. 12 (2005): 851–63. http://dx.doi.org/10.1243/095440505x32724.

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Measurement of the design process is an issue facing business and academic practitioners alike. This paper outlines an approach used to formalize design process measurement within a large electromechanical original equipment manufacturer (OEM) by applying a derivation of the Carnegie-Mellon/Software Engineering Institute systems engineering capability maturity model(R) (SE-CMM(R)), entitled the process capability model-mechanical design (PCM-MD). This new model was created using a similar structure and format of questions as the SE-CMM(R), with modifications to suit mechanical engineering terminology. This was then applied to the mechanical engineering design department of the partner company where it was successfully piloted and then reapplied to produce a picture of how the effectiveness or otherwise of the processes associated with their multidisciplinary mechanical design function altered over time. This work provided the building blocks for further detailed studies to be carried out at other sites in the same company and within the mechanical engineering departments of other firms.

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Hayati, Raziye, Mohammad Ali Bahrevar, Yadolah Ganjkhanlou, Virginia Rojas, and Jurij Koruza. "Erratum to: Electromechanical properties of Ce-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics." Journal of Advanced Ceramics 8, no. 4 (2019): 587. http://dx.doi.org/10.1007/s40145-019-0351-3.

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The affiliation of author “Raziye HAYATI” in the original version of this article was unfortunately wrongly written on page 186, instead of Semiconductor Division, Materials and Energy Research Center, Karaj 31787/316, Iran It should read Department of Materials Engineering, Yasouj University, Yasouj, 75918-74934, Iran

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Wang, Jiangyong, Fa Jing, Yongquan Xia, and Chunsheng Xu. "Study on Model-Based System Engineering in Satellite Layout." MATEC Web of Conferences 316 (2020): 04001. http://dx.doi.org/10.1051/matecconf/202031604001.

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For satellite layout, it is necessary to collate manually in order to obtain accurate product technical requirements information. It is difficult to track the technical status information. It is proposed that the application of model-based system engineering (MBSE) in the cooperative development of multi-disciplinary and multisectoral satellite layout was an effective way to solve these problems. Based on the four typical processes of layout design, this paper studied the requirements to occupancy design, electromechanical joint design, integration of Attitude and Orbit Control System (AOCS) equipment layout, definition and display of equipment expansion, and give the verification design of star sensor layout. The results show that this method is beneficial to the collaboration of all departments, and improve the design ability.

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Yao, Kai-Chao, Wei-Tzer Huang, Li-Chiou Hsu, Chin-Kun Yang, and Jian-Yuan Lai. "Evaluation of the Established IoT Smart Home Robot Teaching Module Based on Embedded Thematic-Approach Strategy." Mathematical Problems in Engineering 2020 (December 22, 2020): 1–10. http://dx.doi.org/10.1155/2020/6696155.

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Artificial intelligence (AI) technology–based intelligent robots are constructed using different technologies, such as Internet of Things (IoT), big data, deep learning, machine learning, neural network, and expert system. This particular type of robots can increase the work efficiency of humans and improve their quality of life. From the industry perspective, AI robots possess unlimited potential for development, and they are projected to be a 10-trillion-dollar industry. In this study, the critical technology of IoT is applied to develop a teaching module for an IoT smart home robot. Teaching and evaluation are performed through an embedded thematic-approach teaching strategy in the course named Automatic Measurement and Monitoring. This research aims to teach students how to integrate IoT technology into robot design and construction to build IoT smart home robots. This cross-disciplinary research incorporates emerging technology—integration of smart home, robot construction, and IoT technologies—into industrial education, teaching material and equipment development, and experimental teaching and evaluation. The participating students were juniors or seniors from the Department of Electrical Engineering or Electromechanical Engineering at the University of Technology.

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Mohammed, Jamal AK, Walaa M. Hashim, and Bahaa S. Beram. "Performance Improvement of a Conventional Hydraulic Elevator by Using Electro-Hydraulic Servo Mechanism." Engineering and Technology Journal 38, no. 5A (2020): 748–60. http://dx.doi.org/10.30684/etj.v38i5a.367.

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An electro-hydraulic elevator is a new type of enhanced elevators that are used in low-rise buildings that do not exceed more than three floors. In this paper, an electro-hydraulic servo system for controlling the speed of a hydraulic elevator prototype by using a proportional valve and PID controller was investigated theoretically and experimentally. A three floors elevator prototype model with 76cm height was built including hydraulics components and electrical components. The elevator system is fully automated using the Arduino UNO board based Data Acquisition (DAQ) system. LabVIEW software is used to control the hydraulic elevator system through L298 DC drive via the DAQ board. The best PID gains was obtained experimentally. The elevator system prototype could be emplimented for educational purposes; such as learning the undergraduate students in the Electromechanical Engineering Department in the University of Technology how to structuring the electro-hydraulic elevator as well as the appropriate control strategy.

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Wysocki, Krzysztof. "Engineering support for the mobility of the Ground Forces of the Russian Federation." Scientific Journal of the Military University of Land Forces 199, no. 1 (2021): 137–54. http://dx.doi.org/10.5604/01.3001.0014.8116.

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The article addresses selected aspects of supporting the mobility of the Ground Forces in the Armed Forces of the Russian Federation. The experience of contemporary armed conflicts in which Russian forces were involved confirmed the need to maintain subunits, guaranteeing maneuver freedom in the area occupied by the enemy. The study aims to present explanations concerning: the role and tasks of the engineering troops of the Russian Federation in contemporary armed conflicts, characteristics of the currently used methods of performing mine barriers, namely mechanical, electromechanical, explosive, manual, and combined ones. Also, the essence of engineering activities according to the views adopted in the Armed Forces of the Russian Federation, the content of engineering support for mobility in tactical departments, and the interpretation of basic concepts, and the role of engineering units and subunits in the activities in question are presented. Besides, the executive potential of selected organizational and functional structures of engineering units, their purpose, and the possibility of implementing individual engineering tasks in tactical activities related to maneuvering and displacement are described. In the aspect of the issue of the impact of engineering barriers and destruction on the pace of the enemy’s attack, an analysis of the execution potential and tactics of operations (doctrinal patterns of combat operations) of a potential enemy (the other party and its capability of supporting the mobility of own troops in the implementation of engineering projects related to crossings (paving) in dams, through natural obstacles and areas of destruction as well as demining terrain and objects) was performed.

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Valenti, Michael. "Tilting Trains Shorten Transit Time." Mechanical Engineering 120, no. 06 (1998): 78–81. http://dx.doi.org/10.1115/1.1998-jun-6.

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This article explains the research work done to study and implement tilling trains. Tilting trains while negotiating curves reduce centrifugal force on passengers yet maintain fast speed on the ride. London-based Virgin Rail has signed one of the largest international railroad contracts ever for a fleet of tilting trains from Fiat Ferroviaria S.p.A. in Savigliano, Italy, to run on Great Britain's high-speed West Coast Main Line. Fiat engineers house the hydraulic or electromechanical actuators of the Pendolino trains in the bogies completely under the cars to preserve space in the passenger compartments. The latest generation of Pendolino train, the ETR 460, was introduced in 1993. This train carries up to 478 passengers at a top speed of 250 kilometers per hour. Each ETR 460 is made up of three traction units, each consisting of two motor cars and one trailer. The Washington State Department of Transportation uses Talgo pendular trains, to cut the travel times of passengers traveling in the Pacific Northwest.

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Papadopoulos, Theofilos, Emmanuel Tatakis, and Efthymios Koukoulis. "Improved Active and Reactive Control of a Small Wind Turbine System Connected to the Grid." Resources 8, no. 1 (2019): 54. http://dx.doi.org/10.3390/resources8010054.

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This paper deals with the interconnection of a small wind turbine with the low voltage distribution grid and the implementation of an improved control scheme, which also serves educational purposes. Initially the subsystems—wind turbine, rectifying bridge, interleaved boost converter, three-phase inverter, interconnection inductors, lifting transformer, filtering capacitors—are investigated, in order to explain their selection, based on the LEMEC (Laboratory of Electromechanical Energy Conversion, Department of Electrical Engineering, UoP) educational policy. Afterwards, the three-phase inverter control scheme, which is responsible for controlling its input voltage (voltage of the DC Bus) and consequently the active power, as well as the reactive power injected into the grid (VQ control) is analyzed. This is accomplished through DQ transformation and PI controllers which are responsible for generating the appropriate reference signals, to generate the required Space Vector Pulse Width Modulation (SVPWM) pulses to drive the semiconductor switches of the inverter. In addition, it is explained how this particular control method can compensate reactive power in the grid, even in apnea, by automatically charging the DC Bus. Finally, simulation and experimental results are given to prove the proposed control method effectiveness.

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Lu, Tongqing, Sibo Cheng, Tiefeng Li, Tiejun Wang, and Zhigang Suo. "Electromechanical Catastrophe." International Journal of Applied Mechanics 08, no. 07 (2016): 1640005. http://dx.doi.org/10.1142/s1758825116400056.

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A transducer is a system that couples two loads. For example, an electromechanical transducer couples a mechanical force and an electrical voltage. A two-load, nonlinear system can exhibit rich behavior of bifurcation, which can be displayed in a three-dimensional space, with the horizontal plane representing the two loads, and the vertical axis representing the state of the system. In this three-dimensional space, a state of equilibrium at fixed loads corresponds to a point on a surface. The surface is smooth, but its projection to the load plane results in singularities of two types: fold and cusp. Here we identify the fold and cusp for a dielectric elastomer transducer by a combination of experiment and calculation. We conduct two kinds of experiment: electrical actuation under a constant force and mechanical pulling under a constant voltage. The theory and the experiment agree well. The fold and cusp are essential in the design of loading paths to avoid or harness the bifurcation.

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Dissertations / Theses on the topic "Electromechanical Engineering – Department of Electromechanical Engineering"

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Leong, Hoi San. "Effect of corrosion inhibitor and laser surface treatment on corrosion behavior of steel used in chilling system." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2550589.

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Cheong, Chan Wa. "Development of heat transfer correlation and flow regime map for heated horizontal pipe using support vector machines." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493970.

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Wen, Quan. "An experimental investigation of inner surface roughness on friction factor for horizontal micro-tubes." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2493677.

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Sio, Sei Hoi. "Concurrent engineering in modern mold design and production." Thesis, University of Macau, 2001. http://umaclib3.umac.mo/record=b1446138.

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Leong, Iok Sam. "An investigation of the usage of small scale furnace for fire resistance test." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1446610.

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Zhong, Jian Hua. "Intelligent system based facility monitoring and fault diagnosis of power generators." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2550655.

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Zhang, Zai Yong. "Simultaneous fault diagnosis of automotive engine ignition systems using pairwise coupled relevance vector machine, extracted pattern features and decision threshold optimization." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493967.

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Chong, Ian Ian. "Vibration control and genetic algorithm based design optimization on self-sensing active constrained layer damped rotating plates." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2493698.

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Wong, Ian Kai. "Numerical study of stokes' second flow problem." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2550664.

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Chan, Lai Cheong. "Investigation on energy efficiency of electrical power system in Macau Coloane power plant." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586280.

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Books on the topic "Electromechanical Engineering – Department of Electromechanical Engineering"

1

Charles, Fraser. Electromechanical engineering: An introduction. IEEE Press, 1994.

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Walsh, Ronald A. Electromechanical design handbook. TPR, 1990.

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Walsh, Ronald A. Electromechanical design handbook. 3rd ed. McGraw-Hill, 2000.

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Walsh, Ronald A. Electromechanical design handbook. 2nd ed. McGraw-Hill, 1995.

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Walsh, Ronald A. Electromechanical design handbook. 2nd ed. McGraw-Hill, 1995.

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Oleg, Wasynczuk, and Pekarek Steven, eds. Electromechanical motion devices. 2nd ed. Wiley-IEEE Press, 2012.

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Understanding electro-mechanical engineering: An introduction to mechatronics. Institute of Electrical and Electronics Engineers, 1996.

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Steinberg, Eric P. Structural probability concepts adapted to electrical engineering. National Aeronautics and Space Administration, 1994.

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Electromechanical systems, electric machines, and applied mechatronics. CRC Press, 2000.

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Utkin, Vadim Ivanovich. Sliding mode control in electromechanical systems. 2nd ed. CRC Press, 2009.

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Book chapters on the topic "Electromechanical Engineering – Department of Electromechanical Engineering"

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Neimark, Juri I. "Electromechanical analogies. Lagrange-Maxwell equations." In Foundations of Engineering Mechanics. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-47878-2_15.

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Tewary, Moumita, and Tarapada Roy. "Electromechanical Responses of Dielectric Elastomers." In Advances in Applied Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1201-8_55.

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Hoseinnezhad, Reza, and Alireza Bab-Hadiashar. "Nonlinearity in an Electromechanical Braking System." In Nonlinear Approaches in Engineering Applications. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1469-8_9.

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Drumea, Petrin, Catalin Dumitrescu, Valentin Barbu, Dan Opruta, and Daniel Banyai. "Digital Pumping System with Electromechanical Repartition." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59509-8_14.

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Carlos, A. B. Reyna, E. Franco Ediguer, and Buiochi Flávio. "Electromechanical Model Applied to Piezoelectric Resonators." In XXVI Brazilian Congress on Biomedical Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2517-5_103.

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Vahdati, Nader, Esmaail Farah, and Oleg Shiryayev. "A Hybrid Electromechanical Engine Mount Design." In Vibration Engineering for a Sustainable Future. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47618-2_8.

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Kaltenbacher, Manfred, and Stefan Reitzinger. "Algebraic Multigrid for Solving Electromechanical Problems." In Lecture Notes in Computational Science and Engineering. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-58312-4_17.

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Wandowski, Tomasz, and Pawel Malinowski. "Electromechanical Impedance Data Fusion for Damage Detection." In Lecture Notes in Civil Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_54.

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Wandowski, Tomasz, and Pawel Malinowski. "Electromechanical Impedance Data Fusion for Damage Detection." In Lecture Notes in Civil Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_54.

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Baughman, R. H., L. W. Shacklette, R. L. Elsenbaumer, E. J. Plichta, and C. Becht. "Micro Electromechanical Actuators Based on Conducting Polymers." In Topics in Molecular Organization and Engineering. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3392-0_27.

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Conference papers on the topic "Electromechanical Engineering – Department of Electromechanical Engineering"

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Hall, John J., Robert L. Williams, and Frank van Graas. "Cartesian Control for the Inertial Measurement Unit Calibration Platform." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/mech-14112.

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Abstract The Department of Mechanical Engineering and the Avionics Engineering Center at Ohio University are developing an electromechanical system for the calibration of an inertial measurement unit (IMU) using global positioning system (GPS) antennas. The GPS antennas and IMU are mounted to a common platform to be oriented in the angular roll, pitch, and yaw motions. Vertical motion is also included to test the systems in a vibrational manner. A four-dof system based on the parallel Carpal Wrist is under development for this task. High-accuracy positioning is not required from the platform since the GPS technology provides absolute positioning for the IMU calibration process.

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Li, Xiaojun, Alan Palazzolo, Dustin Tingey, Xu Han, Patrick McMullen, and Zhiyang Wang. "Shaft-Less Energy Storage Flywheel." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49079.

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This paper provides an overview of a 100 kw flywheel capable of 100 kW-Hr energy storage that is being built by Vibration Control and Electromechanical Lab (VCEL) at Texas A&M University and Calnetix Technologies. The novel design has a potential of nearly doubling the energy density of conventional steel flywheels. Applications include renewable energy source energy storage, frequency regulation at power plants, regenerative braking on vehicles and cranes and backup power at data centers and hospitals. The design and construction of this Department of Energy sponsored flywheel will be presented.

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Bukhari, Mohammad A., and Oumar R. Barry. "Electromechanical Diode: Acoustic Non-Reciprocity in Weakly Nonlinear Metamaterial With Electromechanical Resonators." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22145.

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Abstract Recent attention has been given to acoustic non-reciprocity in metamaterials with nonlinearity. However, the study of asymmetric cells has been limited to mechanical diodes only. There is no work reported on electromechanical rectifiers or diodes. This problem is investigated here by analytically and numerically studying a combination of nonlinear and linear chains coupled with electromechanical resonators. The system is simulated numerically using MATLAB built in integrator and the results are validated by results found in the literature. Numerical examples are carried out to obtain band structure, operation range of electromechanical diode, harvested power, and significant frequency shift, which is demonstrated using spectro-spatial analyses. The observed frequency shift is used to construct an electromechanical diode to guide the wave to propagate in one direction only. This only allows signal sensing for waves propagating in one direction and rejects any other signals. Furthermore, this electromechanical diode is evaluated by calculating the transmission ratio and the asymmetric ratio for a transient input signal.

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Nagem, Raymond J., Sameer Madanshetty, and Gunajit Medhi. "An Electromechanical Vibration Absorber." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0559.

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Abstract A conventional vibration absorber consists of a secondary mechanical oscillator whose properties are chosen to improve the dynamic response of a primary vibratory system. The improvement in the primary system is obtained at the expense of large amplitude mechanical oscillations of the secondary system. We propose an electromechanical absorber in which the secondary system consists of a resonant electric circuit capable of withstanding large amplitude electrical oscillations. The theoretical basis for the design of the electromechanical absorber is presented, and initial experiments to test the technique are described.

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Gaitov, Bаgaudin Khamidovich, Alexander Valeryevich Samorodov, Lev Efimovich Kopelevich, and Alexey Alexandrovich Sharshak. "PROMISING ELECTROMECHANICAL AXIAL CONVERTERS." In International Conference "Actual Issues of Mechanical Engineering" (AIME 2018). Atlantis Press, 2018. http://dx.doi.org/10.2991/aime-18.2018.50.

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Narikawa, Noboru, and Kazuo Takahashi. "Collaborative Design System for Electromechanical Products." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dfm-1411.

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Abstract This paper gives an overview of a collaborative design system (CDS) for electromechanical products. To reduce design costs and to manufacture high-quality products, it is well known that concurrent engineering (CE) is a very efficient approach. Three-dimensional (3D) CAD system and engineering database system are essential components of CE. The CDS is an environment to realize CE. By creating 3D models in a computer and performing some simulations such as mechanical, electronic, software simulation and integrated simulations, it is possible to estimate functions, assemblability, manufacturability and so on, before making prototype models. In this paper, we outline the CDS and mainly discuss the total information management system (TIMS) which makes an important role of the CDS. This paper describes the implementation experience of some functions of the TIMS.

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Xu, Shiyou, and Yong Shi. "Electromechanical Coupling of PZT Nanofibers." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68982.

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This paper presented the results of electromechanical characterization of PZT nanofibers through applied mechanical strain and forced vibration. PZT nanofibers were fabricated by electrospinning process. Titanium film with ZrO2 layer was used to collect the nanofibers and also used as the substrates of the test coupons for the bending tests. Mechanical strain was applied to the test coupons through three-point-bending using Dynamic Mechanical Analyzer (DMA). The largest output voltage was 170mV under 0.5% applied strain. Silicon substrate with trenches was also used to collect the PZT nanofibers for the forced vibration tests. The output voltage from 150Hz sinusoid vibration source was also measured. The peaks of the output voltage were 64.9mV and −95.9mV, respectively. These tests have demonstrated the piezoelectric response of PZT nanofibers. Further tests are to be conducted to precisely determine the piezoelectric constants of PZT nanofibers.

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Laschowski, Brock, and Jan Andrysek. "Electromechanical Design of Robotic Transfemoral Prostheses." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85234.

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Alongside promising advances in biomechatronics, the following research presents the first documented investigation reviewing the electromechanical system designs of energetically-powered (i.e., robotic) prostheses for patients with transfemoral amputations. The technical review begins with examining the material and mechanical designs, and electrical batteries incorporated into robotic transfemoral prostheses. The actuation systems have encompassed electromagnetic actuators (i.e., occasionally featuring series elastic elements), pneumatic actuators (i.e., pneumatic cylinders and pneumatic artificial muscles), and hydraulic actuators. Various wearable sensors have been utilized to provide closed-loop feedback control, including electromechanical sensors, surface electromyography, and bioinspired machine vision systems. The Össur Power Knee (i.e., the only commercially-available powered transfemoral prosthesis) is additionally discussed. The technical review concludes with suggesting prospective future directions for innovation, specifically lower-limb prostheses capability of electrical energy regeneration.

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Vaze, Shilpa A., Prakash Krishnaswami, and James DeVault. "Component Based Modeling of Electromechanical Systems." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85161.

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Simulation methods for electromechanical systems should accommodate their interdisciplinary nature and the fact that these systems often display qualitative changes in system behavior during operation, such as saturation effects and changes in kinematic structure. Current approaches are either based on deriving the system equations by applying a single formulation to all problem domains, or they are based on trying to integrate different software packages/modules to solve the interdisciplinary problem. In this paper, we present a component-based approach which allows the governing equations of each component to be defined in terms of its natural variables. The different component equations are then brought together to form a single system of differential-algebraic equations (DAE’s), which can be numerically solved to obtain the system response. The fact that we have an explicit, unified form of the system governing equations means that this formulation can be easily extended to design sensitivity analysis and optimization of electromechanical systems (EMS). The formulation includes monitor functions which can be used to detect when a qualitative system change has occurred, and to switch to a new set of governing equations to reflect this change. A single step integrator is used to make it easier to switch to a new system behavior, since this will always require a restart of the integrator. There is considerable flexibility in how the components can be defined, and connections between components are themselves modeled as special types of components. Examples of components from the mechanical and electrical side are presented, and two numerical examples are solved to illustrate the efficacy of the proposed method. One example is a link that is driven by a DC motor through a gearbox. The results of this example were verified against Simulink, and good agreement was observed. The second example is a motor driven slider-crank mechanism. The method can be extended to include components from any domain, such as hydraulics, thermal, controls, etc., as long as the governing equations can be written as DAE’s.

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Kopena, Joseph, and William C. Regli. "Extensible Semantics for Representing Electromechanical Assemblies." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/cie-48233.

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Abstract:

Many representations exist for describing engineering artifacts. These representations come from a wide variety of work in many research areas with differing backgrounds and purposes. No unified representation has emerged combining aspects of existing schemes with an ability to easily grow and be extended over time. In this work we demonstrate the application of methods from the knowledge representation community to the domain of engineering artifacts, in particular electromechanical assemblies. We use conceptual graphs as a formal, cleanly extensible representation form. Aspects of several existing results are combined to create a unified representation and demonstrate the approach. We also discuss translation of the conceptual graphs to the DARPA Agent Markup Language (DAML) in order to utilize and cooperate with efforts to develop ontologies for this domain.

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