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DST index prediction using joint and dual unscented Kalman filter

DST index prediction using joint and dual unscented Kalman f...

13th IASTED International Conference on Software 13th IASTED International Conference on Software engineering and Applications, SEA 2009

作者： Kaewkham-Ai, Boonsri Harrison, Robert F. Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiangmai Thailand Department of Automatic Control and Systems Engineering Faculty of Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9780889868120

This paper presents a short-term prediction of the disturbance storm time (DST) index using unscented Kalman filter. Joint and dual estimation methods are studied to examine an improvement of DST index prediction by estimating modal parameters and updating recursively. Comparison between these teachniquies and a fixed model parameter prediction are made in terms of root mean square error (rmse). It is found that joint and dual estimation methods give less rmse than state estimation alone for all DST range, whereas state estimation alone shows better performance than joint and dual estimation for DST below-80 nT.

关键词： State estimation

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Extracting full dynamic equations of 3 degree of freedom rotary table

Extracting full dynamic equations of 3 degree of freedom rot...

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2009 2nd International Conference on Computer, control and Communication, IC4 2009

作者： Dorosti, Masoud Nobari, Jafar Heyrani Digital and Nonlinear Control Systems Lab. Electrical Engineering Department K. N. Toosi University of Technology Tehran Iran Digital and Nonlinear Control Systems Lab. Faculty of Electrical Engineering Department K. N. Toosi University of Technology Tehran Iran

ISBN: (纸本)9781424433148

A 3 Degree of Freedom Rotary Table is a robotic mechanism which brings about rotational movements. This mechanism helps to make a movement scenario in order to test Guidance and Navigation systems of moving vehicles. It has complicated dynamic equations. Having these equations in hand is crucial for control objectives. It is shown that we have obtained these equations by applying the Newton's Second Law for Rotation instead of using common methods in robotic modeling such as Denavit-Hartenberg and Newton-Euler methods. We have extracted full dynamic equations that contain all designing parameters such as Moment of Inertia factor in all round and even the unbalanced and wobble effect. Finally we have verified obtained equations by simulating them in MATLAB software.

关键词： Navigation systems

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Finite state machine with adaptive electromyogram (EMG) feature extraction to drive meal assistance robot

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2009年第2期129卷 308-313+17页

作者： Zhang, Xiu Wang, Xingyu Wang, Bei Sugi, Takenao Nakamura, Masatoshi Department of Automation East China University of Science and Technology 130 Meilong St. Shanghai 200237 China Department of Electrical and Electronic Engineering Faculty of Science and Engineering Saga University 1 Honjomachi Saga 840-8502 Japan Department of Advanced Systems Control Engineering Graduate School of Science and Engineering Saga University 1 Honjomachi Saga 840-8502 Japan

Surface electromyogram (EMG) from elbow, wrist and hand has been widely used as an input of multifunction prostheses for many years. However, for patients with high-level limb deficiencies, muscle activities in upper-limbs are not strong enough to be used as control signals. In this paper, EMG from lower-limbs is acquired and applied to drive a meal assistance robot. An onset detection method with adaptive threshold based on EMG power is proposed to recognize different muscle contractions. Predefined control commands are output by finite state machine (FSM), and applied to operate the robot. The performance of EMG control is compared with joystick control by both objective and subjective indices. The results show that FSM provides the user with an easy-performing control strategy, which successfully operates robots with complicated control commands by limited muscle motions. The high accuracy and comfortableness of the EMG-control meal assistance robot make it feasible for users with upper limbs motor disabilities. © 2009 The Institute of electrical Engineers of Japan.

关键词： Robots

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Expert knowledge-based automatic sleep stage determination by multi-valued decision making method

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2009年第4期129卷 614-619+6页

作者： Wang, Bei Sugi, Takenao Kawana, Fusae Wang, Xingyu Nakamura, Masatoshi Department of Advanced Systems Control Engineering Graduate School of Science and Engineering Saga University Honjomachi Saga 840-8502 Japan Department of Automation School of Information Science and Engineering East China University of Science and Technology 130 Meilong St. Shanghai 200237 China Department of Electrical and Electronic Engineering Faculty of Science and Engineering Saga University Honjomachi Saga 840-8502 Japan Department of Clinical Physiology Toranomon Hospital 2-2-2 Toranomon Minato-ku Tokyo 105-8407 Japan

In this study, an expert knowledge-based automatic sleep stage determination system working on a multivalued decision making method is developed. Visual inspection by a qualified clinician is adopted to obtain the expert knowledge database. The expert knowledge database consists of probability density functions of parameters for various sleep stages. Sleep stages are determined automatically according to the conditional probability. Totally, four subjects were participated. The automatic sleep stage determination results showed close agreements with the visual inspection on sleep stages of awake, REM (rapid eye movement), light sleep and deep sleep. The constructed expert knowledge database reflects the distributions of characteristic parameters which can be adaptive to variable sleep data in hospitals. The developed automatic determination technique based on expert knowledge of visual inspection can be an assistant tool enabling further inspection of sleep disorder cases for clinical practice. © 2009 The Institute of electrical Engineers of Japan.

关键词： Probability density function

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Modeling of hot rolling industrial process using fuzzy logic

Modeling of hot rolling industrial process using fuzzy logic

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22nd International Conference on Computer Applications in Industry and engineering 2009, CAINE 2009

作者： Sheta, A. Öznergiz, E. Abdelrahman, M.A. Babuska, R. Giza Egypt Automatic Control Department Mechanical Engineering Faculty Istanbul Technical University Istanbul 34437 Turkey Electrical and Computer Engineering Department Tennessee Technological University Cookeville TN 38505 United States Delft Center for Systems and Control Delft University of Technology Netherlands

ISBN: (纸本)9781615676668

Steel making is known as a complex manufacturing industrial process. Automation of the process represents a challenge. Empirical mathematical modeling of the process was used to design mill equipment, ensure productivity and service quality. This modeling approach shows many problems associated to complexity and time consumption. Soft computing techniques show significant modeling capabilities on handling complex nonlinear systems modeling. In this paper, we explore the use of Takagi-Sugeno (TS) technique to develop fuzzy models for the Hot-Rolling industrial nonlinear process. We propose three models for the rolling force, torque and slab temperature. A set of rules and membership functions which represents the dynamical relationship between the input and output of these models shall be presented. The performance of the fuzzy models will be compared to the known empirical models for the hot rolling system. Experimental data measured from the Ere˜gli Iron and Steel Factory in Turkey shall be used for the verification of the model outstanding performance.

关键词： Hot rolling

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A Precise SystemC-AMS Model for Charge Pump Phase Lock Loop with Multiphase Outputs

A Precise SystemC-AMS Model for Charge Pump Phase Lock Loop ...

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2009 IEEE 8th International Conference on ASIC(ASICON 2009)

作者： Huib Lincklaen Arriёns Rene van Leuken Alexander de Graaf with Circuits and Systems Group Department of microelectronics & Computer EngineeringFaculty of Electrical Engineering Mathematics and Computer ScienceDelft University of TechnologyNetherlands

SystemC-AMS as an extension of SystemC provides the essential capability to describe a mix-signal heterogeneous system,so that a virtual-prototype model can be generated to help analyze a whole mix-signal system and further guide the circuit *** paper presents an example of Systemc-ams modeling for a 10 phase 500MHz Charge Pump Phase Lock Loop,including digital models like Phase/Frequency Detector and clock N-divider,and analog models like Charge Pump,Low Pass Filter and Voltage controlled *** order to prove the model's accuracy,the SPICE simulation result from the corresponding CMOS circuits based on the same structure of these models is used for comparison,and PLL Systemc-ams model is validated.

关键词： SystemC-AMS,Charge Pump,PLL,CMOS

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Systematic analysis of the electric power and magnetic energy for linear electric and magnetic circuits with modifiable parameters

Systematic analysis of the electric power and magnetic energ...

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Eurocon

作者： Horia Andrei Fanica Spinei Ion Caciula Paul C. Andrei Control Systems and Computer Engineering Electrical Engineering Bucharest Polytechnic Institute Romania Radiating Systems Group Department of Applied Physics Faculty of Physics University of Bucharest Romania Romania Control Systems and Applied Informatics Valahia University of Targoviste Romania Department of Applied Informatics for Electrical Engineering Faculty of Electrical Engineering University of Bucharest Romania

The paper presents a new systematic analysis method in order to estimate the total absorbed power and energy in linear electric and magnetic circuits with modifiable parameters. The relation between the variation in one or all the resistances and reluctances of the networks and the variation of total absorbed power and energy are discussed using the Lagrange's method. For the considered applications the results are obtained with Mathematica and Maple useful for establishing the variation limits of absorbed power and energy.

关键词： Magnetic analysis Magnetic circuits Lagrangian functions Switching circuits H infinity control Stationary state Nonlinear systems

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LPV model identification using blended linear models with given weightings

LPV model identification using blended linear models with gi...

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15th IFAC Symposium on System Identification, SYSID 2009

作者： Zhu, Yucai Ji, Guoli Control Systems Faculty of Electrical Engineering Eindhoven University of Technology PO BOX513 5600MB Eindhoven Netherlands Department of Automation Xiamen University Xiamen 361005 China Tai-Ji Control Grensheuvel 10 5685 AG Best Netherlands

ISBN: (纸本)9783902661470

Nonlinear process identification is studied. In model identification, a linear parameter varying (LPV) model is used and it consists of weighted local linear models. In this work, predetermined weighting functions are used and the LPV model identification becomes a linear identification problem with multiple weighted input data sets. So simplicity is its strength. The developed method is especially suitable for batch processes for which only transition tests are feasible and no working point tests are permitted. It is also suitable for continuous nonlinear process identification. Identifiability and stability of the LPV model are discussed. Simulation studies will be used to verify the effectiveness of the method. © 2009 IFAC.

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Computing the Autopilot control Algorithm Using Predictive Functional control for Unstable Model

Computing the Autopilot Control Algorithm Using Predictive F...

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International Conference of Soft Computing and Pattern Recognition (SOCPAR)

作者： H. A. Kasdirin J. A. Rossiter Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Malaysia Department of Automatic Control & Systems Engineering University of Sheffield UK

This paper discusses the computing development of a control algorithm using predictive functional control (PFC) for model-based that having one or more unstable poles. One basic ballistic missile model is used as an unstable model to formulate the control law algorithm using PFC. PFC algorithm development is computationally simple as a controller and it is not very complicated as the function of a missile will explode as it reaches the target. Furthermore, the analysis and issues of the implementation relating linear discrete-time unstable process are also being discussed. Hence, designed PFC algorithm need to find the suitable tuning parameters as its play an important part of the designing the autopilot controller. Thus, the tuning of the desired time constant, ¿ and small coincidence horizon n1 in a single coincidence point shows that the PFC control law is built better in the dynamic pole of the unstable missile mode. As a result, by using a trajectory set-point, some positive results is presented and discussed as the missile follow its reference trajectory via some simulation using MATLAB 7.0.

关键词： Prediction algorithms Predictive models Design optimization Printing Integer linear programming Constraint optimization Testing Containers Pattern recognition Computer applications

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Review of prognostic problem in condition-based maintenance 10

Review of prognostic problem in condition-based maintenance

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2009 10th European control Conference, ECC 2009

作者： Dragomir, Otilia Elena Gouriveau, Rafael Dragomir, Florin Minca, Eugenia Zerhouni, Noureddine Valahia University of Târgoviste Electrical Engineering Faculty Automation and Information Department Unirii Avenue 18-20 Târgoviste Romania FEMTO-ST Institute CNRS - UFC Automatic Control and Micro-Mechatronic Systems Department 24 rue Alain Savary Besançon25000 France

ISBN: (纸本)9783952417393

Prognostic is nowadays recognized as a key feature in maintenance strategies as it should allow avoiding inopportune maintenance spending. Real prognostic systems are however scarce in industry. That can be explained from different aspects, on of them being the difficulty of choosing an efficient technology: many approaches to support the prognostic process exist, whose applicability is highly dependent on industrial constraints. Thus, the general purpose of the paper is to explore the way of performing failure prognostics so that manager can act consequently. Different aspects of prognostic are discussed. The prognostic process is (re)defined and an overview of prognostic metrics is given. Following that, the 'prognostic approaches' are described. The whole aims at giving an overview of the prognostic area, both from the academic and industrial points of views. © 2009 EUCA.

关键词： Condition based maintenance

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