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IEEE International Conference on Applied Superconductivity and Electromagnetic Devices

作者： Xiao Feng Ding Guan Liang Liu Hong Guo Hua Bai School of Automation Science and Electrical Engineering BeiHang University Department of Electrical and Computer Engineering Kettering University

ISBN: (纸本)9781467381086

This paper presents a novel axial-flux microelectromechanical systems (MEMS) based micromotor with dual-rotor and 10mm diameter. The characteristics of MEMS micromotor are analyzed and modeled using a 3-D magnetic equivalent circuit (MEC) taking the leakage fluxes and fringing effect into account. Such methodology yields more accurate prediction of the flux distribution inside the machine, back electromotive force (EMF) waveform and the torque. The key point of the analytical model is to compute the magnetic flux density in the air gap generated by the permanent magnet. An accurate prediction method of the leakage fluxes based on an improved pigeon-inspired optimization (PIO) algorithm is proposed in this paper. The feasibility of the proposed method is validated by the 3-D finite element analysis (FEA). Finally, the method is applied to design and manufacture the micromotor.

关键词： Mircoelectomechanical systems (MEMS) mircomotor Magnetic equivalent circuit (MEC) Leakage flux Finite element analysis (FEA)

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Human motion recognition system for ergonomic analysis using the kinect sensor 44

Human motion recognition system for ergonomic analysis using...

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Joint International Symposium on "The Social Impacts of Developments in Information, Manufacturing and Service Systems" 44th International Conference on computers and Industrial engineering, CIE 2014 and 9th International Symposium on Intelligent Manufacturing and Service Systems, IMSS 2014

作者： Öz, Cemil Öztel, Ismail Öz, Ali Computer Engineering Department Sakarya University Sakarya Turkey Department of Control and Automation Engineering Yildiz Technical University Istanbul Turkey

In this study we discussed the feasibility and implementation of using Microsoft Kinect as a marker less motion capture system to track human motions of an operator performing a task in an industrial workshop. This was achieved by developing an application to use the skeleton tracking data provided by existing API's for Kinect to generate digital human simulations in an ergonomic assessment and virtual human prototyping system that we created with MakeHuman program. The system uses a Microsoft Kinect to extract the human motion features. The x, y, z values of human skeleton joints are obtained from the Kinect using Microsoft Kinect Library and Microsoft c#. The data obtained from this device are processed by noise reduction, Human kinematic parameters calculation and predicting risk of the musculoskeletal disorders modules. The Applications test results show that the developed system can be successfully used human ergonomic analysis. This system is flexible and open for future extensions.

关键词： Ergonomics

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Harmonic elimination for multilevel converter with Groebner bases and symmetric polynomials

Harmonic elimination for multilevel converter with Groebner ...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Kehu Yang Qi Zhang Ruyi Yuan Wensheng Yu Jin Wang School of Mechanical Electronic and Information Engineering China University of Mining and Technology Beijing Integrated Information System Research Center Institute of Automation Chinese Academy of Sciences School of Electronic Engineering Beijing University of Posts and Telecommunications Department of Electrical and Computer Engineering The Ohio State University

Selective harmonic elimination technology has been widely used in many medium and high power converters which operating at very low switching frequency, however, it is still a challenging work to solve the switching angles from a group of nonlinear transcendental equations, especially for the multilevel converters. In this paper, an algebraic method is proposed for selective harmonic elimination. First, the order of the SHE equations is reduced by using the symmetric polynomials theory, and then, its Groebner bases is computed. After this two conversions, the solving of multivariable high order SHE equations is converted to solve two univariate equations and a set of univariate linear equations which simplifies the solving procedure dramatically and abandon the requirement on initial values and can find all the solutions. Compared with the existing algebraic method, such as the resultant elimination method, the calculation efficiency is improved. Experimental verification is also shown in this paper.

关键词： Polynomials Mathematical model Harmonic analysis Switches Inverters Modulation Software algorithms

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Learning tree network based on mutual information

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Metallurgical and Mining Industry 2015年第12期7卷 146-154页

作者： Hong, Yinghan Mai, Guizhen Liu, Zhusong Physics and Electronic Engineering Department Hanshan Normal University Chaozhou Guangdong China School of computer Science and Technology Guangdong University of Technology Guangzhou Guangdong China School of Automation Guangdong University of Technology Guangzhou Guangdong China School of computer Science and Technology Guangdong University of Technology Guangzhou Guangdong China

Causal discovery is a fundamental problem in scientific research. Although many researchers are committed to finding causal relationships from observational data, large-scale causal discovery remains a tremendous challenge. In this work, an approach based on mutual information for tree network structure learning is proposed. In the first phase of our proposal, we present a skeleton learning method based on mutual information to discover the networks skeleton. In the second phase, an entropy-based direction learning approach is applied to distinguish the directions between nodes. It constructs the whole network of the high dimensional data sets at the end of the last iteration. Experimental results show that the algorithm outperforms the state-of-art informationgeometry method especially when the dimension increases.

关键词： Iterative methods

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Wind-PV-storage optimal environomic design using multi-objective Artificial Bee Colony

Wind-PV-storage optimal environomic design using multi-objec...

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IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： H. Shayeghi M. Moradzadeh Y. Hashemi M. Saif L. Vandevelde Technical Engineering Department Ardabil Iran Dep. of Electrical and Computer Engineering University of Windsor Windsor Canada & the Electrical Energy Laboratory Ghent Belgium Centre for Engineering Innovation Dep. of Electrical and Computer Engineering University of Windsor Windsor Canada Dept. of Electrical Energy Systems and Automation & Energy knowledge platform Power-Link Ghent University Ghent Belgium

ISBN: (纸本)9781467381338

This paper proposes a multi-objective optimization formulation to design a hybrid wind-photovoltaic-storage system to supply the demand. This design problem aims to minimize the annual cost of the overall system as well as the CO2 emissions, and is solved by Artificial Bee Colony (ABC) algorithm. Solar irradiation, wind speed, and load data are assumed deterministic. Prices are all empirical and components of hybrid system are commercially available. A test system in the Northwestern Iran is investigated. The presented technique yields the optimal number of system devices such that the economic and environmental profits are maximized. A fuzzy decision making (FDM) method is applied for finding the best compromise solution from the set of Pareto-optimal solutions obtained by ABC.

关键词： Batteries Optimization Wind turbines Wind speed Renewable energy sources Frequency division multiplexing Maintenance engineering

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Design and Implementation for Multiple-robot Deployment in Intelligent Space

Design and Implementation for Multiple-robot Deployment in I...

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IEEE Conference on Emerging Technologies and Factory automation

作者： H. S. Lee J. H. Oh B. H. Lee Automation and Systems Research Institute Department of Electrical and Computer Engineering Seoul National University

ISBN: (纸本)9781467379304

This paper presents the problem of robot deployment for a number of scattered tasks. We aim to minimize the duration it takes for all robots to reach their assigned task locations. In previous work, we have proposed a team composed of one carrier robot (CR) and several servant robots to accomplish the mission. Then we have suggested an algorithm that determines a path of the CR for an efficient deployment under a few constraints, which is verified by simulations. Assuming that the servant robots are unmanned aerial vehicles (UAVs), the present paper extends the discussion to a real robot experiment. We design and implement a deployment system in intelligent space. The feasibility of the study is demonstrated through an experiment.

关键词： Robot deployment Unmanned Aerial Vehicle chromium

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Possible way of control of heat output in hotwater piping system of district heating

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International Journal of Circuits, Systems and Signal Processing 2015年 9卷 353-361页

作者： Navratil, Pavel Pekar, Libor Klapka, Jindrich Tomas Bata University Zlin Department of Automation and Control Engineering nam. T.G. Masaryka 5555 Zlin760 01 Czech Republic Brno University of Technology Department of Applied Computer Science Technická 2896/2 Brno616 69 Czech Republic

The paper deals with the description possible method of control of a heat output in district heating systems. This control method is called qualitative-quantitative control method of heat output with utilization of prediction of daily diagram of heat supply in hot-water piping systems of district heating. The control method consists in simultaneous and continuous acting of two variables influencing the transferred heat output and in using the prediction of required heat output in a specific locality. The control method should enable elimination of the influence of transport delay between the heat source and heat consumption of individual relatively concentrated consumers. Transport delay can be in the range up to several hours and depends on the length of feeder piping, which can be up to several kilometers, and on the flow speed of heat transfer medium. © 2015, North Atlantic University Union. All rights reserved.

关键词： District heating

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Symbolic time series analysis of the soft starting transient in induction machines

Symbolic time series analysis of the soft starting transient...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Petros Karvelis George Georgoulas Chrysostomos D Stylios Ioannis P. Tsoumas Jose Alfonso Antonino-Daviu Jesús Corral-Hernández Vicente Climente-Alarcón George Nikolakopoulos Dept. of Computer Engineering TEI of Epirus Arta Greece Dept. of Computer Engineering TEI of Epirus Arta Greece Larges Drives Products R&D Department Siemens Industry Sector-Drive Technologies Nuremberg Germany Instituto de Ingeniería Energética Universitat Politècnica de València Valencia Spain Department of Electrical Engineering and Automation Aalto University Finalnd Computer Science Luleå University of Technology Luleå Sweden

ISBN: (纸本)9781479978014

Induction motors are in the heart of almost every production line especially due to their robustness under harsh environments. Nevertheless, even induction machines are prone to faults. Among them, the faults related to the breakage of rotor bars have received special attention by the research community with a number of methods proposed both for the case of steady state as well as for transient operation. For the latter, methods relying on the analysis of the start-up transient have proven to be able to effectively isolate the faulty component that is created by the asymmetry caused by the bar breakage. However, very little work has been done concerning the soft starting of induction machines. In this work, preliminary results of the application of a symbolic time series technique for the analysis of the transient, when the motor is controlled by a soft starter, will be presented and experimentally evaluated.

关键词： Bars Time series analysis Rotors Induction motors Transient analysis Principal component analysis Harmonic analysis

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State constrained predictive control of cart with inverted pendulum

State constrained predictive control of cart with inverted p...

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International Conference on Control, engineering & Information Technology (CEIT)

作者： El Khansa Bdirina Mohamed Seghir Boucherit Ramdane Hadjar Madni Zineb Applied Automation and Industrial Diagnostic Laboratory Djelfa university Algeria LCP Laboratory National Polytechnic School of Algiers Algeria Department of Computer Engineering King Saud University Riyadh Kingdom of Saudi Arabia Department of electronics Djelfa uinversity Algeria

This paper presents the design of predictive control with state constraints for the swing-up and stabilizing control of a cart with an inverted pendulum system where the state constraints are proposed on angle and velocity of pendulum, position and velocity of cart, Since the system has strong nonlinearity and inherent instability, a step of linearization is necessary to extract linear state space model. Then the discrete-time predictive controller is applied to the linearized system, where the general design objective of this one is to compute a trajectory of a future manipulated variable u in order to walk the cart along a setpoint trajectory while keeping the pendulum to the equilibrium position. Maintaining the pendulum in the balanced position is achieved by including state constrained in control objective where the basic idea is to translate the state constraints problems to linear inequalities then parameterize them using the same parameter vector ΔU as the only one used in the design of predictive control, in order to relate to the original model predictive control problem, then the optimal solution is found by solving a quadratic optimization problem. Simulation results show clearly the effect of taking the state constraints in the control design in keeping the pendulum at the balanced position while moving the cart in predefined trajectory.

关键词： Predictive control Predictive models Mathematical model Aerospace electronics Trajectory Optimization

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An Arm for a Leg: Adapting a Robotic Arm for Gait Rehabilitation

An Arm for a Leg: Adapting a Robotic Arm for Gait Rehabilita...

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

作者： Giulia Franchi Ulrich Viereck Robert Platt Sheng-Che Yen Christopher J. Hasson the Department of Informatics and Automation Engineering University of Roma Tre Rome RM 00146 Italy the Department of Computer and Information Science Northeastern University Boston MA 02115 USA the Department of Physical Therapy Movement and Rehabilitation Sciences Northeastern University Boston MA 02115 USA

ISBN: (纸本)9781424492695

The purpose of this study was to adapt a multipurpose robotic arm for gait rehabilitation. An advantage of this approach is versatility: a robotic arm can be attached to almost any point on the body to assist with lower- and upper-extremity rehabilitation. This may be more cost-effective than purchasing and training rehabilitation staff to use several specialized rehabilitation robots. Robotic arms also have a more human-like morphology, which may make them less intimidating or alien to patients. In this study a mechanical interface was developed that allows a fast, secure, and safe attachment between a robotic arm and a human limb. The effectiveness of this interface was assessed by having two healthy subjects walk on a treadmill with and without a robotic arm attached to their legs. The robot's ability to follow the subjects' swinging legs was evaluated at slow and fast walking speeds. Two different control schemes were evaluated: one using the standard manufacturer-provided control algorithm, and another using a custom algorithm that actively compensated for robot-human interaction forces. The results showed that both robot control schemes performed well for slow walking. There were negligible differences between subjects' gait kinematics with and without the robot. During fast walking with the robot, similar results were obtained for one subject;however, the second subject demonstrated noticeable gait modifications. Together, these results show the feasibility of adapting a multipurpose robotic arm for gait rehabilitation.

关键词： Leg Adapting a Robotic Arm Gait Rehabilitation robotic arm Leg Locomotion Gait Rehabilitation Lake Restoration mechanical interfaces Robot

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