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A smart motor speed controller of electrical car

2012 International Mechanical Properties and Structural Materials Conference, IMPSMC 2012

作者： Zhang, Quan Yang, Yongcai Engineering Research Center of Optical Instrument and System Ministry of Education Shanghai Key Lab of Modern Optical System School of Optical-Electrical and Computer Engineering University of Shanghai for Sci. and Tech. Shanghai 200093 China

ISBN: (纸本)9783037854976

Motor operates as the power source of the vehicles, which is one of the most important parts in the vehicle system. This paper is going to find out the speed control method of the DC motor of Golf electrical cars from both theory and practice. A virtual instrument, which produces the Pulse Width Modulation (PWM) signal, is developed with labVIEW to control the motor speed. This smart motor speed controller differs from the traditional mechanical control of DC motor in daily life, and is instructive and significant as a new speed control method of vehicle motor. © (2012) Trans Tech Publications, Switzerland.

关键词： Pulse width modulation

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The scattering of carbon nanotubes on the gaussian beam

The scattering of carbon nanotubes on the gaussian beam

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4th International Conference on Mechanical and electrical Technology, ICMET 2012

作者： Shi-Tong, Xing Hui, Yang Gang, Zheng Hai-Ma, Yang University of Shanghai for Science and Technology School of Optical-Electrical and Computer Engineering 200093 Shanghai China Engineering Research Center of Optical Instrument and System Ministry of Education Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China

ISBN: (纸本)9783037855102

The first-order approximation description of Gaussian beam in the two parallel Cartesian coordinates was introduced. On the basis of Generalized Mie theory, adopting the relation between the spherical vector wave functions belonging to a rotating Cartesian coordinate system, the electromagnetic fields of Gaussian beam with spherical vector wave functions was deduced at any right coordinates system. Then taking advantage of the cylindrical vector wave functions given by Stratton, the relationship of the spherical vector wave functions expressed in cylindrical vector wave functions was deduced. Finally the electromagnetic fields of infinitely long cylinder was expanded by the cylindrical vector, and the approximate expression of the cylinder to the far zone scattered field was solved. © (2012) Trans Tech Publications, Switzerland.

关键词： Aspect ratio

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Visuohaptic discrimination of 3D gross shape

Visuohaptic discrimination of 3D gross shape

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作者： Kim, Kwangtaek Barni, Mauro Prattichizzo, Domenico Tan, Hong Z. Haptic Interface Research Lab. School of Electrical and Computer Engineering Purdue University West Lafayette IN United States Department of Information Engineering University of Siena Siena Italy Department of Advanced Robotics Istituto Italiano di Technologia Genova Italy

Human sensitivity to 3D gross shape changes was measured for the visual and haptic sensory channels. Three volume-invariant affine transformations were defined: compressing, shearing and stretching. Participants discriminated a reference 3D object (cube or sphere) from its deformed shape under three experimental conditions: visual only (on a computer monitor), haptic only (through a point-contact force-feedback device) and visuohaptic simulations. The results indicate that vision is more sensitive to gross shape changes than point-based touch, and that vision dominated in the visuohaptic condition. In the haptic alone condition, thresholds were higher for shearing and stretching than for compressing. Thresholds were otherwise similar for the three transformations in the vision only or visuohaptic conditions. These trends were similar for the two shapes tested. A second experiment, conducted under similar conditions but preventing participants from manipulating object orientations, verified that the main conclusion of our research still holds when visual inspection can rely only on a single perspective view of the object. Our earlier studies on 3D visuohaptic watermarking showed that the haptic channel is more sensitive to surface texture and roughness changes than vision. The thresholds from the present and our earlier studies can potentially be used as the upper limits for selecting watermark strengths in order to ensure watermark imperceptibility in a 3D visuohaptic watermarking system. © 2012 BRILL.

关键词： Watermarking

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Resonance based contactless energy transfer

Resonance based contactless energy transfer

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Power Electronic and Drive systems and Technologies Conference (PEDSTC)

作者： Saeed Hasanzadeh Sadegh Vaez-Zadeh Advanced Motion Systems Research Laboratory and Center of Excellence on Applied Electromagnetic Systems School of Electrical and Computer Engineering University of Tehran Tehran Iran

In this paper, efficiency analysis and design of contactless electric energy transmission systems using inductive method are elaborated. Large leakage inductances of the systems are to be compensated to achieve resonance conditions for maximum efficiency in energy transfer from a launch side to a receiving side where compensating circuits are utilized in both sides. Considering the circuit models of a contactless electrical energy transmission system, the effects of different system parameters including the compensating capacitors are analyzed for a specified frequency range and coupling factor. An algorithm is proposed to determine the optimal compensating capacitors and system resonance frequency to achieve high efficiency.

关键词： Frequency modulation computer aided software engineering

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Design of thrust ripple minimization in wound secondary linear synchronous motors by response surface methodology (RSM)

Design of thrust ripple minimization in wound secondary line...

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2011 2nd Power Electronics, Drive systems and Technologies Conference, PEDSTC 2011

作者： Hosseini, Monir Sadat Khameneh, Mehdi Mardaneh Vaez-Zadeh, Sadegh Advanced Motion Systems Research Lab School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781612844213

In this paper, after modeling and analyzing a single-sided wound secondary linear synchronous motor, single- and multi-objective design optimizations of the motor are carried out to develop larger average thrust and lower thrust ripple than the prototype by using design of experiments (DOE) and response surface methodology (RSM) considering multiple responses. By defining the motor weight as another objective function, it is tried to prevent an increase in motor size and reduce its material consumption. The optimization results confirm that desirable improvements in thrust mean, thrust ripple and motor weight are achieved. Finally, a finite element analysis is employed to evaluate the effectiveness of the employed machine models used in thrust and force ripple calculations and subsequently to confirm the proposed optimization method. © 2011 IEEE.

关键词： Optimization

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Toward a common framework for analysis of high performance controls of PMS motor drives

Toward a common framework for analysis of high performance c...

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Power Electronic and Drive systems and Technologies Conference

作者： Shafaie, Rohollah Vaez-Zadeh, Sadegh Dept. of Electrical Engineering Iran University of Science and Technology Tehran Iran Advanced Motion System Research Laboratory School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781612844213

An analysis of permanent magnet synchronous (PMS) motors is carried out to establish a basis for high performance control of the motors. It is then used to formulate vector control and direct torque control of the machines. This provides an insight into the advanced AC motor control methods in general and into vector control and direct torque control in particular, providing new opportunities for proposing novel AC motor control methods. © 2011 IEEE.

关键词： Permanent magnets

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Cervical inlet patch-optical coherence tomography imaging and clinical significance

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World Journal of Gastroenterology 2012年第20期18卷 2502-2510页

作者： Chao Zhou Tejas Kirtane Tsung-Han Tsai Hsiang-Chieh Lee Desmond C Adler Joseph M Schmitt Qin Huang James G Fujimoto Hiroshi Mashimo Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139-4307 United States Gastroenterology Section VA Boston Healthcare System/Harvard School of Medicine 150 S. Huntington Avenue Boston MA 02131 United States Light Lab Imaging-St Jude Medical Inc. Westford MN 55117-9983 United States

AIM:To demonstrate the feasibility of optical coherence tomography(OCT)imaging in differentiating cervical inlet patch(CIP)from normal esophagus,Barrett'sesophagus(BE),normal stomach and duodenum. METHODS:This study was conducted at the Veterans Affairs Boston Healthcare system(VABHS).Patients undergoing standard esophagogastroduodenoscopy at VABHS,including one patient with CIP,one representative patient with BE and three representative normal subjects were *** light video endoscopy was performed and endoscopic 3D-OCT images were obtained in each patient using a prototype OCT *** OCT imaging probe passes through the working channel of the endoscope to enable simultaneous video endoscopy and 3D-OCT examination of the human gastrointestinal(GI)*** hematoxylin and eosin(H and E)histology was performed on biopsy or endoscopic mucosal resection specimens in order to compare and validate the 3D-OCT data. RESULTS:CIP was observed from a 68-year old male with gastroesophageal reflux *** CIP region appeared as a pink circular lesion in the upper esophagus under white light *** imaging over the CIP region showed columnar epithelium structure,which clearly contrasted the squamous epithelium structure from adjacent normal esophagus.3D-OCT images obtained from other representative patients demonstrated distinctive patterns of the normal esophagus,BE,normal stomach,and normal duodenum ***,such as squamous epithelium,lamina propria, muscularis mucosa,muscularis propria,esophageal glands,Barrett's glands,gastric mucosa,gastric glands, and intestinal mucosal villi were clearly observed with OCT and matched with H and E *** results demonstrated the feasibility of using OCT to evaluate GI tissue morphology in situ and in real-time. CONCLUSION:We demonstrate in situ evaluation of CIP microstructures using 3D-OCT,which may be a useful tool for future diagnosis and follow-up of patients with CIP.

关键词： Cervical inlet patch Heterotopic gastric mucosa Optical coherence tomography Optical biopsy Barrett’s esophagus

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Combined vector and direct torque control methods for IPM motor drives using emotional controller (BELBIC)

Combined vector and direct torque control methods for IPM mo...

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Power Electronic and Drive systems and Technologies Conference

作者： Vaez-Zadeh, S. Daryabeigi, E. Advanced Motion Systems Research Laboratory School of Electrical and Computer Engineering University of Tehran Iran Electrical Engineering Department Najafabad Branch Islamic Azad University Esfahan Iran

ISBN: (纸本)9781612844213

This paper presents a modern control system for three phase high performance interior permanent magnet motor drives. The control system combines the advantages of vector control and direct torque control and overcomes some of the implementation drawbacks of either of the methods. The system uses a current control loop in connection with a switching table. A brain emotional learning based intelligent controller (BELBIC) is employed in the system which provides excellent performance under different operating conditions. BELBIC is based on the emotion processing mechanism in human's brain providing actions based on sensory inputs and emotional cues. A comprehensive evaluation of an IPM motor performance under the proposed control system proves the effectiveness of the system and its partial superiority over either vector control or direct torque control despite its relatively simple structure. © 2011 IEEE.

关键词： Vectors

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Toward a common framework for analysis of high performance controls of PMS motor drives

Toward a common framework for analysis of high performance c...

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Power Electronic and Drive systems and Technologies Conference (PEDSTC)

作者： Rohollah Shafaie Sadegh Vaez-Zadeh Department of Electrical Engineering Iran University of Science and Technology Tehran Iran Advanced Motion System Research Laboratory School of Electrical and Computer Engineering University of Tehran Tehran Iran

关键词： Stators Permanent magnet motors Torque Hysteresis motors Couplings

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Design of thrust ripple minimization in wound secondary linear synchronous motors by response surface methodology (RSM)

Design of thrust ripple minimization in wound secondary line...

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Power Electronic and Drive systems and Technologies Conference (PEDSTC)

作者： Monir Sadat Hosseini Mehdi Mardaneh Khameneh Sadegh Vaez-Zadeh Advanced Motion Systems Research Lab School of Electrical and Computer Engineering College of Engineering The Center of Excellence on Applied Electromagnetic Systems University of Tehran Tehran Iran

关键词： Optimization Synchronous motors Analytical models Finite element methods Permanent magnet motors Electromagnets Force

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