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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Reza Lotfi Rabeeh Majidi Mohammad Maymandi-Nejad Wouter A. Serdijn Electronics Research Laboratory Department of Microelectronics Delft University of Technnology Delft Netherlands Integrated Systems Laboratory Department of Electrical Engineering Ferdowsi University of Mashhad Mashhad Iran

ISBN: (纸本)9781424438273

Successive-approximation analog-to-digital converters (SA-ADCs) have recently been widely used for moderate-speed moderate-resolution applications where power consumption is of major concern. In this paper, several techniques are proposed to further reduce the power consumption of an SA-ADC. These solutions include a splitsegmented architecture for the capacitor-based digital-to-analog converter (DAC), a modified switching scheme for the DAC, and employing a smaller supply voltage for the comparator and the successive-approximation register while using a new power efficient digital level converter. Spectre simulation results of a single-ended 10-bit 100kS/s SA-ADC in a 0.13-mum CMOS technology employing the proposed techniques show that the ADC (excluding reference buffers) consumes less than 1 muW of power while offering an effective number of bits of 9.2.

关键词： Analog-digital conversion Energy consumption Capacitors CMOS technology Switches Sampling methods Digital circuits Threshold voltage Digital-analog conversion Switching converters

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Comparison of international learning outcomes and development of engineering curricula

Comparison of international learning outcomes and developmen...

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2009 ASEE Annual Conference and Exposition

作者： Alkhairy, Ashraf Blank, Leland Boning, Duane Cardwell, David Carter, W. Craig Collings, Nick Hayhurst, Allan Milne, William Robinson, Peter Seering, Warren Sheppard, Sallie Smith, Kenneth Stronge, Bill Alfaisal University Saudi Arabia Texas A and M University Qatar United States Department of Electrical Engineering and Computer Science MIT United States Department of Engineering University of Cambridge United Kingdom Department of Materials Science MIT United States Department of Chemical Engineering Cambridge University United Kingdom Department of Electrical Engineering Cambridge University United Kingdom Electronic Devices and Materials Group United Kingdom Department of Computer Technology Computer Laboratory University of Cambridge United Kingdom Department of Mechanical Engineering MIT United States Department of Engineering Systems MIT United States Design and Systems Division of Mechanical Engineering Nissan Cambridge Basic Research Laboratory MIT Center for Innovation in Product Development Department of Computer Science Texas A and M University United States Department of Chemical Engineering MIT United States Whitaker College of Health Sciences and Technology United States Department of Applied Mechanics Cambridge University United Kingdom University of California Davis United States

Various national and regional engineering accreditation bodies have developed sets of learning or program outcomes that serve as the foundation for the evaluation of curriculum quality. Some of the outcome structures are very broadly defined, leaving the details of curriculum design and the justification to the university and the accreditation evaluators. Other accreditation bodies define outcomes more thoroughly in topic and depth, with accreditation hinging on the general fit of the curriculum to these specifications. Most of these outcome structures have been developed and used as accreditation standards predominantly over the last decade. During this time, existing curricula are usually altered and upgraded (that is, 'retrofitted') to meet the outcomes requirements. However, new degree programs and new engineering colleges have the opportunity to use the relevant outcomes as design specifications. Such a design ensures quality, prepares the college for future accreditation evaluation, and can be tailored to meet the needs of students and prospective employers. This paper compares the outcomes structure and contents of several accreditation bodies, including the engineering Council of the UK (EC UK), EUR-ACE of the EU, and ABET of the USA. Similarities and differences between the outcomes of the bodies will be highlighted. The use of these accrediting standards as the basis of design specifications for engineering degrees at the Alfaisal University in Riyadh, Saudi Arabia will be presented. The designs for integrated BS, MS and PhD curricula were developed over a two-year period, based on the defined learning outcomes, by a committee comprised of the Founding Dean of engineering and faculty from the Massachusetts Institute of Technology (MIT), the University of Cambridge and independent reviewers. Example BS and MS curricula and their fit to the outcome specifications are described. © American Society for engineering Education, 2009.

关键词： Accreditation

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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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From high-level real-time software design to low level hardware simulation: a methodology to evaluate performances of control embedded systems

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IFAC Proceedings Volumes 2009年第1期42卷 121-126页

作者： Klemen Perko Rémy Kocik Rédha Hamouche Andrej Trost Sipronika d.o.o. Ljubljana Trzaska 2 SI-1000 Ljubljana Slovenia Université Paris-Est ESIEE Paris Embedded Systems Department Cité DeScirctes - BP 99 - 2 Bd Blaise Pascal - 93162 Noisy-Le-Grand Cedex Laboratory for Integrated Circuit Design Faculty of Electrical Engineering University of Ljubljana Trzaska 25 SI-1000 Ljubljana Slovenia

The real time implementation behaviour of a control algorithm has an impact on its control performances. Metrics used to evaluate performances of real-time embedded systems (RTES) usually considers systems compliance to RT constraints. For RTES in control domain this metrics is insufficient and needs to be extended with control performance metrics. We propose a methodology to evaluate control performances taking into account several RT software implementations on different hardware. This methodology relies on a bridge that we have defined to make a link between a RTES design tool (MoDEST) and a HW-SW system-level modeling tool (ASyMod). This paper focus on model transformation between these two tools, and an example shows the benefits of it.

关键词： Modelling Model Transformations Embedded control systems design Real-time systems

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Bio-Inspired Adaptive Integrated Information Processing

Bio-Inspired Adaptive Integrated Information Processing

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IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Hoda S. Abdel-Aty-Zohdy Microelectronics Systems Design Laboratory Department of Electrical and Computer Engineering Oakland University Rochester MI USA

Biological brains are dramatically more effective in dealing with real-world adaptive information processes and decisions than most advanced computers. Advanced computers can utilize the discipline of classical signal processing whereby providing theoretical mathematical and statistical approaches for information processing, and with the vision of bio-inspired adaptive processing are evolving into neuromorphic integrated sensory processing systems. Numerous MISO (multi-input, single output) sensory applications demand reliable and effective information processing which, at an initial stage may be addressed by solving the key problems of advanced computing platforms, which are: i-massive parallelism; ii-low power consumption of massively large systems; iii-intelligent systems that learn from observations and perform better on the next run; iv-integrated systems for embedded feasibility; and v-systems that adapt to the environment. Thus, our Adaptive Integrated Information Processing (AIIP) approaches, presented in this paper. Two AIIP systems are presented: Neural networks with synaptic plasticity, as our Spiking Neural Networks (SNNs), with up to one million inputs, for chemical sensing and detection; and Adaptive Recurrent Dynamic Neural Networks (ARDNNs) for defect tracking, reliable system deployment, and prognosis for telecommunication and similar applications. Further-our presented AIIP systems may provide a viable solution to offering powerful modulation schemes and transmission rates far beyond current possible communications systems.

关键词： Information processing Power system reliability Biological neural networks Neural networks Recurrent neural networks Biology computing Computer vision Adaptive signal processing Biomedical signal processing Neuromorphics

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Control design for efficient and cost-effective distributed fuel cell power electronics system

Control design for efficient and cost-effective distributed ...

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34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008

作者： Mazumder, Sudip K. Pradhan, Sanjaya K. Laboratory for Energy and Switching-Electronics Systems Department of Electrical and Computer Engineering University of Illinois Chicago United States Product Design Engineer Philips United States

ISBN: (纸本)9781424417667

Batteries in a fuel cell power system are essential to provide the additional load demands during the sharp load transients. This necessitates a power electronics system, which would control the energy flow between the fuel cell stack, the battery and the load during the transient and in the steady-state. In this paper, a cost-effective and efficient power electronic system is proposed for a fuel cell based hybrid power system based on a distributed power electronics topology. The system includes a hierarchical controlling architecture, in which the master control optimizes the control parameters of the individual subsystem controls, which in turn optimizes the performance and efficiency of the overall system while nullifying the effects of load transients on the fuel cell stack subsystem. The power electronics system concept is further experimentally validated using a four module bidirectional dc-dc converter with Nexa PEM stack. © 2008 IEEE.

关键词： Cost effectiveness

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Editorial introduction for the special issue on sensors for microfluidic analysis systems

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IEEE Sensors Journal 2008年第5期8卷 427-429页

作者： Nagle, H. Troy Fair, Richard B. Shannon, Mark A. Tan, Ooi Kiang Geschke, Oliver Ahn, Chong H. Kaynak, Okyay Vellekoop, Michael J. Duke University Department of Electrical and Computer Engineering Durham NC 27708 United States University of Illinois at Urbana-Champaign Department of Mechanical Engineering Urbana IL 61801-2906 United States Nanyang Technological University Division of Microelectronics School of Electrical and Electronic Engineering Singapore 639798 Singapore Technical University of Denmark Department of Micro- and Nanotechnology Kongens Lyngby DK-2800 Denmark University of Cincinnati Department of Electrical and Computer Engineering and Computer Science Cincinnati OH 45221-0030 United States Bogazici University Department of Electrical and Electronics Engineering Istanbul 34342 Turkey Vienna University of Technology Institute of Sensor and Actuator Systems Vienna A-1040 Austria Department of Electrical and Computer Engineering Duke University Electrochemical Society Department of Mechanical Engineering University of Illinois at Urbana-Champaign Urbana IL United States National Science Foundation Science and Technology Center WaterCAMPWS Micro-Nano-Mechanical Systems Laboratory Nanyang Technological University School of Electrical and Electronic Engineering Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH United States Departments of Electrical Engineering and Biomedical Engineering Microsystems and BioMEMS Laboratory Univensity of Cincinnati Departments of Electrical and Electronics Engineering Bogazici University Istanbul Turkey UNESCO Mechatronics Research and Annlication Centre Vienna Austria Department of Industrial Sensor Systems Institute of Sensor and Actuator Systems Vienna University of Technology Vienna Austria

No abstract available

关键词： Special issues and sections Sensor systems Microfluidics microelectronics USA Councils Mechanical engineering Actuators Fabrication Biosensors Ferroelectric materials

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Modeling and simulation for on-chip power grid networks by locally dominant krylov subspace method

Modeling and simulation for on-chip power grid networks by l...

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2008 International Conference on Computer-Aided design, ICCAD

作者： Yan, Boyuan Tan, Sheldon X.-D. Chen, Gengsheng Wu, Lifeng Department of Electrical Engineering University of California Riverside CA 92521 United States ASIC and System State-Key-Lab Microelectronics Dept. Fudan Univeristy Shanghai 200433 China Cadence Design Systems Inc. San Jose CA 95134 United States

ISBN: (纸本)9781424428205

Fast analysis of power grid networks has been a challenging problem for many years. The huge size renders circuit simulation inefficient and the large number of inputs further limits the application of existing Krylov-subspace macromodeling algorithms. However, strong locality has been observed that two nodes geometrically far have very small electrical impact on each other because of the exponential attenuation. However, no systematic approaches have been proposed to exploit such locality. In this paper, we propose a novel modeling and simulation scheme, which can automatically identify the dominant inputs for a given observed node in a power grid network. This enables us to build extremely compact models by projecting the system onto the locally dominant Krylov subspace corresponding to those dominant inputs only. The resulting simulation can be very fast with the compact models if we only need to view the responses of a few nodes under many different inputs. Experimental results show that the proposed method can have at least 100X speedup over SPICE-like simulations on a number of large power grid networks up to 1M nodes.

关键词： Circuit simulation

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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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Control design for efficient and cost-effective distributed fuel cell power electronics system

Control design for efficient and cost-effective distributed ...

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Annual Conference of Industrial Electronics Society

作者： Sudip K. Mazumder Sanjaya K. Pradhan Laboratory for Energy and Switching-Electronics Systems Department of Electrical and Computer Engineering University of Illinois Chicago USA Product Design Engineer Philips

关键词： Control design Fuel cells Power electronics Control systems Power system transients Batteries Steady-state Hybrid power systems Circuit topology DC-DC power converters

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