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Nirma University International Conference on engineering (NUiCONE)

作者： Sandip Mehta Khushuben Vasoya Dipak Adhyaru Instrumentation and Control Engineering Section Institute of Technology Nirma University Ahmedabad Gujarat India

In this paper, design and implementation of Neuro-Fuzzy Algorithm for Fractional Order controller System has been carried out. Fractional order system and controller has wide application in control word. Simulation study for the fractional order transfer function using different control algorithm has been done. Fractional order system was controlled by ANFIS and Classical PID controller. Comparative analysis between ANFIS and PID has been carried out in this paper. From this analysis it is observed that ANFIS gives better performance.

关键词： control systems Mathematical model Fuzzy logic Simulation Adaptation models Adaptive systems MATLAB

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Comparative analysis of zoning based methods for Gujarati handwritten numeral recognition

Comparative analysis of zoning based methods for Gujarati ha...

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Nirma University International Conference on engineering (NUiCONE)

作者： Ankit K. Sharma Dipak M. Adhyaru Tanish H. Zaveri Priyank B Thakkar Instrumentation and Control Engineering Section Nirma University of Science and Technology Ahmedabad Gujarat IN Electronics and Communication Engineering Section Computer Engineering Section Nirma University Ahmedabad Gujarat India

Gujarati is one of the ancient Indian languages spoken widely by the people of Gujarat state. This paper is concerned with the recognition of handwritten Gujarati numerals. For recognition of Gujarati numerals zoning based Feature extraction method is used. Numeral image is divided in 16×16, 8×8, 4×4 and 2×2 Zones. After feature extraction through the zoning method, Naive Bayes classifier and multilayer feed forward neural network classifier are implemented for the classification of numerals. For the database generation, 14,000 samples of each numeral are used. The overall recognition rates of this method used for recognition of Gujarati numeral using 16×16, 8×8, 4×4 and 2×2 zoning with neural network are 93.03%, 95.92%, 91.89% and 61.78% and with Naive Bayes classifier are 75%, 85.60%, 81% and 53.75% respectively.

关键词： Feature extraction Handwriting recognition Neural networks Databases Character recognition Classification algorithms Optical character recognition software

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Application of model order reduction techniques to space-time kinetics model of AHWR

Application of model order reduction techniques to space-tim...

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International Conference on Industrial instrumentation and control (ICIC)

作者： A. Rajasekhar A. P. Tiwari Madhu. N. Belur Reactor Control System Design Section Electronics & Instrumentation Group Bhabha Atomic Research Centre Mumbai Dept. of Electrical Engineering Indian Institute of Technology Mumbai

ISBN: (纸本)9781479971664

Advanced Heavy Water Reactor (AHWR), a large nuclear reactor in which heat removal is based on natural circulation of light water in coolant channels, is described by an 80 th order model for accurate representation of its core neutronics behavior. The model, besides being nonlinear, is stiff and control design and analysis studies for AHWR are accompanied by serious numerical ill-conditioning problems. Hence, there is a strong motivation for obtaining reduced order model for AHWR. In particular, the application of model order reduction based on Davison's and Marshall's dominant mode retention and Singular Perturbation techniques has been explored. Also, their performance, relative to each other, has been assessed by comparing the characteristics of the three model reduction techniques with the characteristics of the original higher order model. All of these three techniques are found to be very effective in obtaining a lower order simpler models for AHWR.

关键词： Eigenvalues and eigenfunctions Zirconium Distance measurement

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A review of active yaw control system for vehicle handling and stability enhancement

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International Journal of Vehicular Technology 2014年第1期2014卷

作者： Aripin, M.K. Md Sam, Yahaya Danapalasingam, Kumeresan A. Peng, Kemao Hamzah, N. Ismail, M.F. Control Instrumentation and Automation Department Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka 76100 Durian Tunggal Melaka Malaysia Department of Control and Mechatronics Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor Malaysia Temasek Laboratories National University of Singapore 117411 Singapore 5A Engineering Drive 1 Singapore Faculty of Electrical Engineering UiTM Pulau Pinang 13500 Permatang Pauh Pulau Pinang Malaysia Industrial Automation Section Universiti Kuala Lumpur Malaysia France Institute 43650 Bandar Baru Bangi Selangor Jalan Teras Jernang Malaysia

Yaw stability control system plays a significant role in vehicle lateral dynamics in order to improve the vehicle handling and stability performances. However, not many researches have been focused on the transient performances improvement of vehicle yaw rate and sideslip tracking control. This paper reviews the vital elements for control system design of an active yaw stability control system;the vehicle dynamic models, control objectives, active chassis control, and control strategies with the focus on identifying suitable criteria for improved transient performances. Each element is discussed and compared in terms of their underlying theory, strengths, weaknesses, and applicability. Based on this, we conclude that the sliding mode control with nonlinear sliding surface based on composite nonlinear feedback is a potential control strategy for improving the transient performances of yaw rate and sideslip tracking control. © 2014 M. K. Aripin et al.

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Vehicle stability enhancement based on second order sliding mode control

Vehicle stability enhancement based on second order sliding ...

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2012 IEEE International Conference on control System, Computing and engineering, ICCSCE 2012

作者： Hamzah, Norhazimi Aripin, M Khairi Sam, Yahaya Md Selamat, Hazlina Ismail, Muhamad Fahezal Faculty of Electrical Engineering Universiti Teknologi MARA Pulau Pinang Malaysia Control Instrumentation and Automation Department Faculty of Electrical Engineering UTeM Melaka Malaysia Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Malaysia Industrial Automation Section UniklMfi Selangor Malaysia

ISBN: (纸本)9781467331432

The vehicle handling and stability in emergency situation can be enhanced with direct yaw moment control (DYC). In this paper, a new controller using super twisting technique based on second order sliding mode control (SOSM) is proposed for the yaw moment control. The controller is designed based on two degree of freedom (2DOF) nonlinear model. The effectiveness of the proposed controller is compared to PI controller and conventional sliding mode controller by co-simulations in CarSim and Matlab/Simulink. The results show that the SOSM give better performance in tracking the desired response necessary for the vehicle handling and stability. In addition, the chattering phenomenon is also reduced, giving a smooth tracking trajectory. © 2012 IEEE.

关键词： controllers

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Yaw stability improvement for four-wheel active steering vehicle using sliding mode control

Yaw stability improvement for four-wheel active steering veh...

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2012 IEEE 8th International Colloquium on Signal Processing and Its Applications, CSPA 2012

作者： Hamzah, Norhazimi Sam, Yahaya Md Selamat, Hazlina Aripin, M. Khairi Ismail, Muhamad Fahezal Faculty of Electrical Engineering Universiti Teknologi MARA Pulau Pinang Malaysia Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Malaysia Control Instrumentation and Automation Department Faculty of Electrical Engineering UTeM Melaka Malaysia Industrial Automation Section UniklMfi Selangor Malaysia

ISBN: (纸本)9781467309615

Active steering control is one of the approach that can be used to improve the vehicle's lateral and yaw stability. By combining active front steering and active rear steering control, the vehicle's handling and stability can be improved via four wheel active steering (4WAS) control. In this paper, a robust control algorithm of sliding mode control is designed for 4WAS vehicle. Single track 2 d.o.f linear model is utilized for controller design and simulation purpose. Simulation for 4WAS and front steering (AFS) is carried out in Simulink for step steer and double lane change maneuver to verify the effectiveness of the proposed control system. The result shows that the 4WAS perform better than the AFS in tracking the desired response trajectory. © 2012 IEEE.

关键词： Sliding mode control

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Fault detection and isolation for nonlinear systems via HOSM multiple-observer

Fault detection and isolation for nonlinear systems via HOSM...

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8th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, SAFEPROCESS 2012

作者： Ríos, H. Edwards, C. Davila, J. Fridman, L. National Autonomous University of Mexico Electrical Engineering Engineering Faculty C.P. 04510 Mexico D.F. Mexico Control and Instrumentation Research Group Department of Engineering University of Leicester University Road Leicester LE1 7RH United Kingdom National Polytechnic Institute Section of Graduate Studies and Research ESIME-UPT C.P. 07340 Mexico D.F. Mexico Department of Automatic Control CINVESTAV-IPN Mexico D.F. AP-14-740 Mexico

ISBN: (纸本)9783902823090

The fault detection and isolation problem is studied for a class of nonlinear systems. Under structural conditions, a bank of High-Order Sliding-Mode observers is proposed. The value of the equivalent output injection is used for detecting and isolating particular faults in the system. The proposed method provides finite-time isolation of actuator and plant faults. Simulation results support the proposed approach. © 2012 IFAC.

关键词： Fault detection

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Fault Detection and Isolation for Nonlinear Systems via HOSM Multiple-Observer *

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IFAC Proceedings Volumes 2012年第20期45卷 534-539页

作者： H. Ríos C. Edwards J. Davila L. Fridman National Autonomous University of Mexico Program of PhD in Electrical Engineering Engineering Faculty C.P. 04510 Mexico D.F Control and Instrumentation Research Group Department of Engineering University of Leicester University Road Leicester LE1 7RH UK National Polytechnic Institute Section of Graduate Studies and Research ESIME-UPT C.P. 07340 Mexico D.F Department of Automatic Control CINVESTAV-IPN Mexico D.F. AP-14-740 on leave on National Autonomous University of Mexico Engineering Department of Control and Robotics Division of Electrical Engineering Engineering Faculty C.P. 04510 Mexico D.F

关键词： High-order Sliding-Mode Observers Fault Detection Fault Isolation

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Optimized quality factor of fractional order analog filters with band-pass and band-stop characteristics

Optimized quality factor of fractional order analog filters ...

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International Conference on Computing and Networking Technology (ICCNT)

作者： Anindya Pakhira Saptarshi Das Anish Acharya Indranil Pan Suman Saha Department of Instrumentation and Electronics Engineering Jadavpur University Kolkata India Department of Power Engineering Jadavpur University Kolkata India MERG Energy Environment Modelling and Minerals E2M2) Research Section Department of Earth Science and Engineering Imperial College London London UK Drives and Control System Technology Group CSIR-Central Mechanical Engineering Research Institute Durgapur India

ISBN: (纸本)9781467356930

Fractional order (FO) filters have been investigated in this paper, with band-pass (BP) and band-stop (BS) characteristics, which can not be achieved with conventional integer order filters with orders lesser then two. The quality factors for symmetric and asymmetric magnitude response have been optimized using real coded Genetic Algorithm (GA) for a user specified center frequency. Parametric influence of the FO filters on the magnitude response is also illustrated with credible numerical simulations.

关键词： Numerical simulation Filtering Ear

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Verification and validation of attitude and orbit control systems for flexible satellites

Verification and validation of attitude and orbit control sy...

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作者： Wang, Wenfei Menon, Prathyush P. Bates, Declan G. Bennani, Samir Control and Instrumentation Research Group Department of Engineering University of Leicester United Kingdom Guidance Navigation and Control Section ESA ESTEC Noordwijk Netherlands

ISBN: (纸本)9781563479786

In this paper, an optimisation-based approach is proposed for the verification and validation (V & V) of an attitude and orbit control system (AOCS) for flexible satellites. Several optimisation methods, including local gradient-based algorithms, global evolutionary algorithms, and hybrid local/global algorithms are applied to the problem of analysing the robustness of a full-authority multivariable controller with respect to several frequency-domain performance criteria, for a 6 degree of freedom simulation model of a satellite with large sun shields. The results of our study reveal the advantages of optimisation-based worst-case analysis over traditional Monte-Carlo simulations for systems with flexible dynamics. In particular, it is shown that hybrid local/global optimisation algorithms can produce more reliable estimates of worst-case performance, while also reducing the associated computational overheads. The proposed approach appears to have significant potential for improving the industrial V & V process for next-generation high-performance satellite control systems. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Evolutionary algorithms

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