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IEEE Radio and Wireless Symposium (RWS formerly RAWCON)

作者： Huanyu Chen Mohammad Neshat Suren Gigoyan Daryoosh Saeedkia Safieddin Safavi-Naeini Microwave and Terahertz Photonics Integrated System Laboratory (MISL) Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

In this paper, a low-cost planar antenna array structure made of tapered dielectric image-line (DIL) radiators with a T-junction type feeding configuration is presented for Ka band frequency range. The radiation beam can be steered by changing the operation frequency. A beam deflection of 12deg in horizontal plane is achieved by 2 GHz change in the operation frequency. A 22 dB directivity is estimated for a 3-element array structure. The measurement results are presented and are compared with the simulation results.

关键词： Frequency Antenna feeds Antenna arrays Electronics packaging Phased arrays Dielectric resonator antennas Waveguide junctions Millimeter wave technology Microwave antenna arrays Microstrip antennas

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Agile hardware development with rapid hardware definition language

Agile hardware development with rapid hardware definition la...

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IEEE International Conference on Electro-Information Technology

作者： Jacob N. Allen Hoda S. Abdel-Aty-Zohdy Robert L. Ewing Microelectronics System Design Laboratory Department of Electrical and Computer Engineering Oakland University Rochester Hills MI USA Air Force Research Laboratory OH USA

Rapid HDL is a hardware definition language developed in C# for the Microsoft .Net platform. Rapid HDL unifies digital FPGA hardware development and co-software integration. Hardware is scripted using reusable software objects, communication between hardware and software is automatic, and synthesis is automated using a free tool chain. Rapid HDL represents 18,000 lines of code and is freely available under the MIT license.

关键词： Hardware design languages Software libraries Testing Licenses Microelectronics Force sensors Field programmable gate arrays Software reusability Software tools High level languages

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Cognitive processing using spiking neural networks

Cognitive processing using spiking neural networks

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IEEE National Conference on Aerospace and Electronics (NAECON)

ISBN: (纸本)9781424444946

Powerful parallel cognitive processors can be developed by studying biologically plausible models of cognitive systems in animals and extrapolating key principles to be adapted for implementation in digital computer architectures. The network described here uses basic statistical methods such as proportion sampling on a massively parallel scale to create a general purpose pattern classifier. From these principles, we can achieve auto association and self organization that provides fundamental cognitive processing. Signal preprocessing is essential to transform the signal into a scale and rotation invariant binary pattern. The network avoids the curse of dimensionality by filtering out irrelevant inputs, allowing us to combine large sensor input vectors from multiple sources. Recent hardware designs define the network structure and state in memory, and then use accelerator processor cores to modify these memory structures in parallel.

关键词： Neural networks Neurons Biological system modeling Biology computing Biological information theory Brain modeling computer architecture Microelectronics Power engineering and energy Biosensors

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Development of a 6-axis robotic arm controller implemented on a low-cost microcontroller

Development of a 6-axis robotic arm controller implemented o...

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International Conference on electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： Agus Bejo Wanchalerm Pora Hiroaki Kunieda Embedded System and IC Design Research Laboratory Department of Electrical Engineering Faculty of Engineering Chulalongkom University Thailand Kunieda-Isshiki Laboratory Department of Communication and Integrated Systems Graduate School of Science and Engineering Tokyo Institute of Technology Japan

This paper presents a case study of development of a 6-axis robotic arm controller. The robot is powered by a hydraulic pump. The position of each axis can be derived from its potentiometer voltage. At each and every axis, a servo-valve is employed to control a servo motor. Its relative velocity is related to the servo-valve input. With 2 nd order PID controller, a micro-controller commands movements of all axes. The PID inputs are the six voltages from potentiometers and its outputs are the six DC voltages, which command the six servo-valves. A trajectory file is generated by solving the inverse kinematics problem with some (angular to digital value) conversions. A special case; closed-form calculation is developed to solve kinematics problem. With some constraints it only yields one solution. Experiments show that robot follow the given trajectory with acceptable errors.

关键词： Robot control Microcontrollers Robot kinematics Control systems Potentiometers Communication system control Voltage Servomechanisms Servomotors Service robots

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Single-trial analysis of cortical oscillatory activities during voluntary movements using empirical mode decomposition (emd)-based spatiotemporal approach

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Annals of Biomedical engineering 2009年第8期37卷 1683-1700页

作者： Lee, Po-Lei Shang, Li-Zen Wu, Yu-Te Shu, Chih-Hung Hsieh, Jen-Chuen Lin, Yung-Yang Wu, Chi-Hsun Liu, Yu-Lu Yang, Chia-Yen Sun, Chia-Wei Shyu, Kuo-Kai Department of Electrical Engineering National Central University No. 300 Jhongda Rd. Jhongli City Taoyuan County 32001 Taiwan Integrated Brain Research Laboratory Department of Medical Research and Education Taipei Veterans General Hospital Taipei Taiwan Institute of Brain Science National Yang-Ming University Taipei Taiwan Institute of Radiological Science National Yang-Ming University Taipei Taiwan Department of Otolaryngology Taipei Veterans General Hospital Taipei Taiwan National Yang-Ming University School of Medicine Taipei Taiwan Center for Neuroscience National Yang-Ming University Taipei Taiwan Neurological Institute Taipei Veterans General Hospital Taipei Taiwan Institute of Computer Communication and System Engineering Ching-Yun University Taoyuan Taiwan Biophotonics Interdisciplinary Research Center National Yang-Ming University Taipei Taiwan Institute of Biophotonics National Yang-Ming University Taipei Taiwan

This study presents a method based on empirical mode decomposition (EMD) and a spatial template-based matching approach to extract sensorimotor oscillatory activities from multi-channel magnetoencephalographic (MEG) measurements during right index finger lifting. The longitudinal gradiometer of the sensor unit which presents most prominent SEF was selected on which each single-trial recording was decomposed into a set of intrinsic mode functions (IMFs). The correlation between each IMF of the selected channel and raw data on other channels were created and represented as a spatial map. The sensorimotor-related IMFs with corresponding correlational spatial map exhibiting large values on primary sensorimotor area (SMI) were selected via spatial-template matching process. Trial-specific alpha and beta bands were determined in sensorimotor-related oscillatory activities using a two-spectrum comparison between the spectra obtained from baseline period (-4 to -3 s) and movement-onset period (-0.5 to 0.5 s). Sensorimotor-related oscillatory activities were filtered within the trial-specific frequency bands to resolve task-related oscillatory activities. Results demonstrated that the optimal phase and amplitude information were preserved not only for alpha suppression (event-related desynchronization) and beta rebound (event-related synchronization) but also for profound analysis of subtle dynamics across trials. The retention of high SNR in the extracted oscillatory activities allow various methods of source estimation that can be applied to study the intricate brain dynamics of motor control mechanisms. The present study enables the possibility of investigating cortical pathophysiology of movement disorder on a trial-by-trial basis which also permits an effective alternative for participants or patients who can not endure lengthy procedures or are incapable of sustaining long experiments. © 2009 Biomedical engineering Society.

关键词： Intrinsic mode functions

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Wave-front arrival time analysis using wide-area frequency measurements

Wave-front arrival time analysis using wide-area frequency m...

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IEEE General Meeting Power& Energy Society

作者： Jing Ma Jinlong Li Zengping Wang Jie Wu Tao Xia Lang Chen Yilu Liu School of Electrical and Electronic Engineering North China Electric Power University Beijing China Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute Blacksburg VA USA Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China Zhejiang Electric Power Design Institute Hangzhou China

Due to the influence of the local noise at the distribution level, the frequency curve obtained from the frequency disturbance recorder (FDR) unit is too non-stationary to observe its wave-front directly, which causes some problems in the event location estimation method. In this paper, a morphological filter (MF) is employed to extract the wave-front arrival time and the trend of the frequency curve. With the help of the MF, the accuracy of the event location method is greatly improved.

关键词： Frequency measurement Frequency estimation Power system measurements Network servers Wide area measurements Filters Web server Global Positioning system Frequency synchronization Power system dynamics

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Lab report writing (and teaching!) made easy

Lab report writing (and teaching!) made easy

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2008 ASEE Annual Conference and Exposition

作者： Magleby, Alyssa Furse, Cynthia University of Utah Department of Electrical and Computer Engineering University of Utah NSF DLR Project - Integrated System Level Design NSF STEP Program LiveWire Test Labs Inc.

This paper reports on a project to improve students' ability to write better lab reports and assist teaching assistants (TAs) in grading reports in a consistent manner. A lab report teaching system was developed that includes lab report templates, teaching assistant instructions, grading rubrics, examples, peer review materials and instructions, and recommendations for quickly providing student feedback (grading). These materials were developed for project-based labs across the electrical engineering curriculum and utilize methods to write weekly lab updates that are combined into a final lab report, mimicking methods commonly used in industry. The technical writing information was adapted to all levels of complexity to help students from freshman through senior years. The system begins with instruction on writing very basic reports, and builds each year on previous knowledge and practices, to prepare students to later write complex reports. This system is designed to improve students' understanding of labs (by 'writing to learn') in addition to preparing them for the communication intensive workplace. The amount of time spent grading such reports is often a primary concern, as this is commonly given as a reason for not requiring advanced writing assignments in engineering classes. Detailed guidelines and grading rubrics are included in this manual to instruct TAs on better and more consistent grading techniques. Guidelines for checking both lab books and formal lab reports help improve TA training and grading consistency, reducing student complaints. Although this system was designed for an electrical engineering program, it can also be adapted to other technical fields and used for various scientific lab reports. © American Society for engineering Education, 2008.

关键词： Grading

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Analyzing the Impact of Fault-tolerant BIST for VLSI design

Analyzing the Impact of Fault-tolerant BIST for VLSI Design

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IEEE International Symposium on Defect and Fault Tolerance in VLSI systems

作者： W. Robert Daasch Saurabh Jain David Armbrust Integrated Circuits Design and Test Laboratory Department of Electrical and Computer Engineering Portland State University USA

ISBN: (纸本)9780769533650

This paper examines fault-tolerant DfT (design for Test) circuits as an effective approach for improved reliability and lower defective parts per million (DPPM). The paper provides a comprehensive examination of one alternative, quadded gate, inter-leaved node logic design. Quadded DfT circuitry is compared to circuitry with no fault tolerance in terms of area, power and performance. Ever shrinking device sizes are challenging the reliability limits and testing capabilities of a modern day integrated circuit (IC). Parametric variations, higher gate counts and lower pin counts render fault avoidance techniques ineffective and make fault detection an engineering challenge. Higher defect rates and Ultra Large Scale Integration (ULSI) will require bigger and complex DfT circuitry. This will result in more chips being rejected due to DfT failures. Fault-tolerant DfT directly translates to shorter time-to-market, increased reliability and improved yield learning.

关键词： Logic gates Fault tolerance Fault tolerant systems Circuit faults Built-in self-test Libraries integrated circuit reliability

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Fractional-Order Signal Processing using a Polymer-Electrolyte Transistor

Fractional-Order Signal Processing using a Polymer-Electroly...

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51st Midwest Symposium on Circuits and systems (MWSCAS 2008), vol.2

作者： Robert L. Ewing Hoda S. Abdel-Aty-Zohdy Michael C. Hollenbeck Kenneth S. Stevens Information Directorate US Air Force Research Laboratory OH USA Microelectronics System Design Laboratory Department of Electrical and Systems Engineering Oakland University Rochester MI USA Department of Electrical and Computer Engineering University of Utah Salt Lake UT USA

Fractional-order systems have applications in the areas of Flight Control, Robotics, Missile Guidance, Control of Structural Vibrations of Space Platforms and Sensor Technology. Fractional-order transfer functions can characterize complex nonlinear dynamics with many fewer parameters than integer-order functions. This paper addresses the use of a polymer-electrolyte transistor (PET) for use in implementating fractional-order algorithms for signal processing. The PET's advantage over the conventional RC and RL circuits is that it can be both functionally scaled and varied for dynamic fractional-order parameter controllability.

关键词： Fractional-Order Signal Processing Polymer-electrolyte transistor Acid/base chemistry Diffusion Electrokinetic flow

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Electrocardiographic pill for cattle heart rate determination

Electrocardiographic pill for cattle heart rate determinatio...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Steve Warren Angel Martinez Timothy Sobering Daniel Andresen Department of Electrical & Computer Engineering Kansas State University Manhattan KS USA Integrated Defense Systems Raytheon Corporation Andover MA USA Electronics Design Laboratory Kansas State University Manhattan KS USA Department of Computing & Information Sciences Kansas State University Manhattan KS USA

Decreased agricultural profit margins and recent bioterrorism concerns have led to an increased interest in monitoring livestock health. Heart rate and core body temperature are traditional vital parameters for cattle health assessment, as they provide warnings for illness and disease. However, obtaining these data in the field is time and labor intensive, which speaks to the need for solutions that provide continuous and automatic acquisition of these parameters. This paper presents the design of a pill that can remain in an animal's reticulum and use electrocardiographic techniques to ascertain heart rate. The wired prototype has been tested with a fistulated steer. These tests demonstrate that consistent heart vector data can be acquired even in the presence of animal movement and rumination. After minor processing, these signals are suitable for use with peak detection circuitry that can automate heart rate determination.

关键词： Cows Heart rate Biomedical monitoring Electrocardiography Band-pass filters Monitoring

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