Informatics Publishing Limited

Rita Saini ¹, Rajeev Gupta ¹, Girish Parmar ²

Affiliations
1 Electronics Engineering, RTU Kota, Kota, IN
2 Electronics Engineering, Modi Institute of Technology, Kota, IN

Abstract

This Paper tries to explore the potential of using artificial intelligence method in controllers and their advantages over conventional methods. PID controller, being the most widely used controller in industrial applications, needs efficient method to control the different parameters of the plant. This Paper asserts that the conventional approach of PID tuning is not very efficient due to the presence of non-linearity in the system of the plant. The output of the conventional PID system has a quite high overshoot and settling time. Tuning of the PID parameters continues to be important as these parameters have a great influence on the stability and performance of the control system. This paper proposes a method based on the ant colony optimization technique (ACO) to determine the parameters of the Proportional Integral Derivative (PID) controller for getting best performance for a given plant. The method searches the PID parameter that realizes the expected step response of the plant. It is based upon maximization of a fitness function. The plant model is represented by the transfer function T(s) of a low damping plant. The PID parameter is computed by ACO-based PID tuning method. The method show the effectiveness of the proposed tuning method.

Keywords

Ant Colony Optimization, PID Controller.

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Neeraj Jain ¹, Girish Parmar ¹, Rajeev Gupta ¹

Affiliations
1 Department of Electronics Engineering, Rajasthan Technical University, IN

Abstract

In this paper swarm intelligence based PID controller tuning is proposed for a nonlinear ball and hoop system. Particle swarm optimization (PSO), Artificial bee colony (ABC), Bacterial foraging optimization (BFO) is some example of swarm intelligence techniques which are focused for PID controller tuning. These algorithms are also tested on perturbed ball and hoop model. Integral square error (ISE) based performance index is used for finding the best possible value of controller parameters. Matlab software is used for designing the ball and hoop model. It is found that these swarm intelligence techniques have easy implementation & lesser settling & rise time compare to conventional methods.

Keywords

Swarm Intelligence, Ball and Hoop System, PID Controller, Integral Square Error.

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Jeetendra Agarwal ¹, Girish Parmar ¹, Rajeev Gupta ¹

Affiliations
1 Department of Electronics and Communication Engineering, Rajasthan Technical University, IN

Abstract

The water level of the U-tube steam generator (UTSG) in a nuclear power unit, which is an important process parameter, must be maintained in a safe range whether the unit is working under fixed or variable conditions. In this paper, a higher order UTSG model derived from the state equations is reduced using Balanced Truncation technique. Two controllers using Fuzzy logic and LQR techniques have been designed for the reduced UTSG model to control its water level. Comparison of these two controllers has also been shown through the simulation results. Also, a comparative analysis of the reduced order model and a previously developed UTSG model is presented by simulating both UTSG models with Fuzzy Logic and LQR techniques and the results are compared.

Keywords

Nuclear Reactor, UTSG Model, Model Order Reduction, LQR, Fuzzy Logic.

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M. L. Meena ¹, Mithilesh Kumar ¹, Girish Parmar ¹

Affiliations
1 Department of Electronics Engineering, University College of Engineering, Rajasthan Technical University, IN

Abstract

A modified design technique of unidirectional circular patch antenna with parabolic shape ground plane for the application of microwave links is being presented here. Firstly, T-slots are inserted diagonally at the corners of parabolic ground plane in order to increase the directivity. Thereafter, for the further improvement in the directivity as well as gain the ellipse slot in circular patch has also been introduced. The microstrip feed line is given for the proposed unidirectional antenna. The simulation analysis of the antenna is done on software CST Microwave Studio using FR-4 substrate with dielectric constant 4.3. The simulated results and parametric analysis show a good return loss with respect to -10 dB. The radiation pattern characteristic, gain characteristic, VSWR pattern and surface current distribution performance of the antenna have also been compared at different resonate frequencies.

Keywords

Parabolic Ground, Ellipse Slot, Unidirectional Antenna, Microwave Links, Microstrip Line.

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Jay Kumar ¹, Girish Parmar ²

Affiliations
1 Department of Electronics and Communication Engineering, Raja Balwant Singh Engineering Technical Campus, IN
2 Department of Electronics Engineering, Rajasthan Technical University, IN

Abstract

In this article, a new grounded to floating admittance convertor employing only two voltage differencing transconductance amplifiers (VDTAs) has been suggested. The proposed configuration is able to convert any arbitrary grounded admittance into floating admittance without any requirement of additional passive element. The equivalent floating admittance value can tuned electronically through VDTA transconductance. Depending on the passive element selection, the presented topology can simulate active floating resistor and floating capacitor. The presented circuit does not require any active/passive component matching constraints; it has low sensitivity values and good non-ideal behavior. The influence of VDTA port parasitic on proposed configuration is also investigated. The validity of proposed circuit is verified by some application examples. VDTA based Grounded to Floating Admittance converter is implemented & simulated with PSPICE using the 0.18um CMOS technology.

Keywords

Floating Admittance, VDTA, Electronic Control, No Matching Constraints.

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Mahendra Kumar Pandey ¹, Girish Parmar ¹, Rajeev Gupta ¹

Affiliations
1 Department of Electronics Engineering, Rajasthan Technical University, IN

Abstract

Due to development of the internet technologies and other services, requirement of rightful ownership and copyright is highly required. Hence to protect the copyrighted data from unauthorized user, a robust non-blind hybrid color image watermarking scheme is presented. In this proposed scheme, we use color watermark instead of gray watermark which is generally used in most of the existing digital image watermarking techniques. YCbCr color space used to separate the R, G and B channel of images. Y channel of color watermark is embedded into corresponding Y channel of cover image using proposed scheme. Arnold transform are used to scramble the watermark image before embedding process in order to provide more security. The singular value of bands is going to embed with singular values of watermark by making use of variable scaling factor (α). As original image is required at the time of extraction of watermark hence propose scheme belong to non-blind technique group. The two-fidelity parameter namely Peak signal to noise ratio (PSNR) and structural similarity (SSIM) index are used to measure the imperceptibility whereas similarity between original and extracted watermark is measured by using normalized correlation coefficient (NCC). We also compared the results of proposed scheme with other existing watermarking schemes. The experimental results prove effectiveness of the proposed image watermarking scheme in term of robustness and imperceptibility.

Keywords

Watermarking, Copyright Protection, Stationary Wavelet Transform, Singular Value Decomposition (SVD), Arnold Transform, PSNR, SSIM, NCC.

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