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2011 2nd IEEE International Conference on Signal and Image Processing Applications, ICSIPA 2011

作者： Varshney, P. Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology Dwarka New Delhi 110078 India

ISBN: (纸本)9781457702419

This paper deals with the study of effect of fractional operators in chaotic systems. Chaos means randomness and irregularity. Some of the typical features of chaos are non-linearity, determinism, sensitivity to initial conditions and irregularity. In this paper, three s-to-z transformations viz. Tustin, Al-Alaoui and Maneesha-Pragya-Visweswaran operators have been used to obtain integer order approximations of fractional integrators in z-domain. The stability of the proposed models has been investigated. These discretizations can be applied for analysis of fractional order Chua systems. A comparison with the existing approximations is also presented. The major purpose of the paper is to emphasize that the z-domain approximations proposed in this paper can be used for hardware realizations. © 2011 IEEE.

关键词： Chaotic systems

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Identification of optimal wavelet-based algorithm for removal of power line interferences in ECG signals

Identification of optimal wavelet-based algorithm for remova...

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India International Conference on Power Electronics, IICPE 2010

作者： Garg, Girisha Gupta, Shorya Singh, Vijander Gupta, J.R.P. Mittal, A.P. Department of Instrumentation and Control Engineering Netaji Subhas Institute of Technology University of Delhi New Delhi India

ISBN: (纸本)9781424478835

Identification of optimal denoising algorithm for ECG signals using DWT is described. The parameters are determined by comparing different types of wavelet functions, decomposition levels and threshold selection methods. The algorithm is used to improve the SNR of the ECG contaminated by disturbances like power line interferences, to present a clean signal for accurate auto diagnosis.

关键词： Electrocardiograms

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Evaluation and comparison of integer-order approximations for fractional integrators for application to fractional-order Chua systems

Evaluation and comparison of integer-order approximations fo...

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IEEE International Conference on Signal and Image Processing Applications (ICSIPA)

作者： P. Varshney Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology New Delhi India

关键词： Approximation methods Conferences Image processing Chaotic communication Simulation control systems

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New Approaches for Image Compression Using Neural Network

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Journal of Intelligent Learning Systems and Applications 2011年第4期3卷 220-229页

作者： Vilas H. Gaidhane Vijander Singh Yogesh V. Hote Mahendra Kumar Instrumentation and Control Engineering Division Netaji Subhas Institute of Technology University of Delhi Indian Institute of Technology Roorkee India Mahamaya Technical University

An image consists of large data and requires more space in the memory. The large data results in more transmission time from transmitter to receiver. The time consumption can be reduced by using data compression techniques. In this technique, it is possible to eliminate the redundant data contained in an image. The compressed image requires less memory space and less time to transmit in the form of information from transmitter to receiver. Artificial neural net- work with feed forward back propagation technique can be used for image compression. In this paper, the Bipolar Coding Technique is proposed and implemented for image compression and obtained the better results as compared to Principal Component Analysis (PCA) technique. However, the LM algorithm is also proposed and implemented which can acts as a powerful technique for image compression. It is observed that the Bipolar Coding and LM algorithm suits the best for image compression and processing applications.

关键词： Image Compression Feed Forward Back Propagation Neural Network Principal Component Analysis (PCA) Levenberg-Marquardt (LM) Algorithm PSNR MSE

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Verification of the veracity of brachistochrone curve and evolution of optimal control

Verification of the veracity of brachistochrone curve and ev...

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India International Conference on Power Electronics (IICPE)

作者： S. K. Jha H. Parthsarathy J. R. P. Gupta P. Gaur Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology New Delhi India Division of Electronics and Communication Engineering Netaji Subhas Institute of Technology New Delhi India

An evocative solution for the brachistochrone problem is presented by Euler-Lagrange equation. The solution of brachistochrone problem by variational approach i.e. Euler-Lagrange equation leads to the curve of a cycloid also known as brachistochrone curve. In this paper the exactness of the brachistochrone curve is verified through simulated studies in MATLAB, taking into cognizance different other curves viz. straight line and parabola along with cycloid. By computing the time taken by the bead in traversing the path between two points under gravity along all the curves considered, it is seen after comparison that the time taken along the cycloid is the least.

关键词： Mathematical model Optimal control Equations Instruments Calculus control engineering Educational institutions

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AI based controller for three phase three level, soft switched, phase shift PWM DC to DC converter for high power application

AI based controller for three phase three level, soft switch...

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India International Conference on Power Electronics, IICPE 2010

作者： Santosi, Himanshu Gaur, Prerna Virmani, Rahul Mittal, A.P. Singh, Bhim Divison of Instrumentation and Control Engineering Netaji Subhas Institute of Technology Univ. of Delhi New Delhi-110078 India Deptt. of Electrical Engineering Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India

ISBN: (纸本)9781424478835

An artificial intelligence controller for three phase three level soft switched, phase shifted PWM(phase shift modulation) dc to dc converter is proposed for high voltage and high power applications. In which, it is analyzed that four switches in a leg where outer switch behaves as a zero voltage switching and inner switch behaves as a zero current switching. The performance is analyzed by simulation in MATLAB/SIMULINK. ©2011 IEEE.

关键词： DC-DC converters

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Simulation and control of reactive distillation column

Simulation and control of reactive distillation column

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India International Conference on Power Electronics (IICPE)

作者： Ujjwal Kapoor Asha Rani Vijander Singh J. R. P Gupta Instrumentation and Control Engineering Division Netaji Subhas Institute of Technology University of Delhi New Delhi India

The paper discusses about the application of PID controller and fuzzy controller in reactive distillation column. A generic mathematical model of reactive distillation has been taken for simulation. The PID and fuzzy controllers are designed for the process and then the overall process is controlled by using conventional (PID) and intelligent (fuzzy) controllers separately. Conventional PID controller is used to control the temperature of the column and then it is replaced by fuzzy controller and then the results from both the controllers are compared.

关键词： Distillation equipment Feeds Temperature control Process control Temperature sensors Steady-state

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A novel method for extraction of speed from resolver output using neural network in vector control of PMSM

A novel method for extraction of speed from resolver output ...

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India International Conference on Power Electronics, IICPE 2010

作者： Gaur, Prerna Bhardwaj, Sumit Jain, Naveen Garg, Nipun Prashant, Ananthanara Mittal, A.P. Singh, Bhim Divison of Instrumentation and Control Engineering Netaji Subhas Institute of Technology Univ. of Delhi New Delhi-110078 India Deptt. of Electrical. Engineering Indian Institute of Technology Delhi Hauz KhasNew Delhi-110016 India

ISBN: (纸本)9781424478835

The rotor position is integrant information for vector control drive system of Permanent Magnet Synchronous Motor (PMSM). In this paper, the focus is on the rotor position of PMSM detecting by the resolver sensor. The outstanding features of this sensor are its robust structure and noise insensitivity. To extract speed from the output of resolver we need R/D demodulator circuit. A new Artificial Neural Network (ANN) Algorithm is proposed in this paper in substitution for R/D circuit and implemented in the vector control drive system of PMSM. The proposed scheme has been verified by simulation and experiment using MATLAB/Simulink. ©2011 IEEE.

关键词： Neural networks

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Identification of optimal wavelet-based algorithm for removal of power line interferences in ECG signals

Identification of optimal wavelet-based algorithm for remova...

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India International Conference on Power Electronics (IICPE)

作者： Girisha Garg Shorya Gupta Vijander Singh J. R. P. Gupta A. P. Mittal Department of Instrumentation and Control Engineering Netaji Subhas Institute of Technology University of Delhi New Delhi India

关键词： Electrocardiography Signal to noise ratio Noise reduction Discrete wavelet transforms

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Fuzzy reinforcement learning control for decentralized partially observable Markov decision processes

Fuzzy reinforcement learning control for decentralized parti...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Rajneesh Sharma Matthijs T. J. Spaan Instrumentation and Control Division Netaji Subhas Institute of Technology New Delhi India Institute of Systems and Robotics Instituto Superior Technico Lisboa Portugal

Decentralized Partially Observable Markov Decision Processes (Dec-POMDPs) offer a powerful platform for optimizing sequential decision making in partially observable stochastic environments. However, finding optimal solutions for Dec-POMDPs is known to be intractable, necessitating approximate/suboptimal approaches. To address this problem, this work proposes a novel fuzzy reinforcement learning (RL) based game theoretic controller for Dec-POMDPs. The proposed controller implements fuzzy RL on Dec-POMDPs, which are modeled as a sequence of Bayesian games (BG). The main contributions of the work are the introduction of a game based RL paradigm in a Dec-POMDP settings, and the use of fuzzy inference systems to effectively generalize the underlying belief space. We apply the proposed technique on two benchmark problems and compare results against state-of-the-art Dec POMDP control approach. The results validate the feasibility and effectiveness of using game theoretic RL based fuzzy control for addressing intractability of Dec-POMDPs, thus opening up a new research direction.

关键词： Joints Markov processes Games Learning Function approximation Infinite horizon Bayesian methods

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