Marwadi Education Foundation Group of Institution

Rajkot Gujarat, India

Marwadi Education Foundation Group of Institution

Rajkot Gujarat, India
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Patel C.C.,Marwadi Education Foundation Group of Institution
International Journal of Advanced Structural Engineering | Year: 2017

In this paper, the response behaviors of two parallel structures coupled by Lead Extrusion Dampers (LED) under various earthquake ground motion excitations are investigated. The equation of motion for the two parallel, multi-degree-of-freedom (MDOF) structures connected by LEDs is formulated. To explore the viability of LED to control the responses, namely displacement, acceleration and shear force of parallel coupled structures, the numerical study is done in two parts: (1) two parallel MDOF structures connected with LEDs having same damper damping in all the dampers and (2) two parallel MDOF structures connected with LEDs having different damper damping. A parametric study is conducted to investigate the optimum damping of the dampers. Moreover, to limit the cost of the dampers, the study is conducted with only 50% of total dampers at optimal locations, instead of placing the dampers at all the floor level. Results show that LEDs connecting the parallel structures of different fundamental frequencies, the earthquake-induced responses of either structure can be effectively reduced. Further, it is not necessary to connect the two structures at all floors; however, lesser damper at appropriate locations can significantly reduce the earthquake response of the coupled system, thus reducing the cost of the dampers significantly. © 2017, The Author(s).


Mukhi R.,Marwadi Education Foundation Group of Institution | Lakhani M.,Ahmedabad University
International Conference on Automatic Control and Dynamic Optimization Techniques, ICACDOT 2016 | Year: 2017

The term Next Generation Technology has been often used by IT enthusiasts. Many see next generation technologies as one of the solution vectors for the global challenges of the 21st century. However, a small research has shed light on this term and specified its characteristics and meaning of it. Next generation technologies are critical to solve large problems faced by this world. Therefore, this paper aims to highlight the benefits of Next Generation Technology. The primary aim of this research paper was to highlight the importance of Next Generation Technology, to create awareness about its working principles and advantages and to inform its disadvantages. We have included the following concepts of the Next Generation Technology along with its implementing technology: Augmented Reality and Virtual Reality, Artificial Intelligence and Machine Learning, Autonomous Driving, Internet of Things, Modular Smartphones. © 2016 IEEE.


Senghani N.N.,Marwadi Education Foundation Group of Institution | Rao G.S.,Marwadi Education Foundation Group of Institution
Proceedings of the International Conference on Innovative Applications of Computational Intelligence on Power, Energy and Controls with Their Impact on Humanity, CIPECH 2014 | Year: 2014

This work describes four quadrant operation of D.C. motor with reduce number of switches in hybrid converter topology. By using such converter dc motor can operate in four quadrants. This concept reduces switching losses of MOSFET and improves efficiency, dynamic response of the system also shows the dynamic braking of motor to achieve forward braking and reverses braking operation successfully implemented in MATLAB/Simulink. A comparative study is performed with conventional eight switches converter with proposed two switches hybrid converter for four quadrant operation of a DC machine. The simple H-Bridge topology is used to eliminate switches from conventional converter, modified topology is also easy to control in braking mode also. The MATLAB simulation and results are discussed. © 2014 IEEE.


Bharatiraja C.,SRM University | Jeevananthan S.,Pondicherry Engineering College | Raghu S.,Marwadi Education Foundation Group of Institution | Arvind V.,SRM University | Sameer A.,SRM University
International Review on Modelling and Simulations | Year: 2013

This work presents multi-carrier interleaved PWM strategies to control common mode voltage (CMV) in three phase coupled inductor inverter (CII). The proposed scheme has the feature of reduced number of switches with higher output voltage level. The major problem in the coupled inductor inverter (CII) topology is power loss in inductor that is related to the magnitude of current ripple in the winding. The proposed multi-carrier interleaved PWM technique is easy to implement when compared to other PWM techniques. The additional advantage is reduction of the current ripple in inductor. The minimization of current ripple in inductor winding leads to the reduction in the common mode current participation in the (Y-Δ) connected induction motor. The common mode voltage is represented as the integration of the common mode current in each phase. The multi-carrier interleaved PWM consists of the continuous and discontinuous modes of operation. By choosing the high effective switching state with the help of Discontinuous PWM technique for inductor winding, the common mode voltage (CMV) can be reduced without degrading the performance of the inverter. The proposed scheme is applied for three-phase coupled inductor inverter (CII) to obtain the five level output. The benefit of these proposed switching strategies is reduction of the common mode voltage in the range of ±Vdc/12. The simulation with 1HP induction motor drive system is set-up in MATLAB and same result is validated effectively by hardware-FPGA SPARTAN-3E processor. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Bharatiraja C.,SRM University | Raghu S.,Marwadi Education Foundation Group of Institution | Rao P.,SRM University | Paliniamy K.R.S.,SRM University
International Journal of Power Electronics and Drive Systems | Year: 2013

This work presents the comparative study of the different PWM techniques to reduce the common-mode voltage (CMV) at the output of neutral point diode clamped inverter for variable speed drives. Here the comparative study is done by the phase opposition disposed (POD), sinusoidal pulse width modulation (SPWM), phase disposition (PD), phase shift (PS) space vector modulation (SVM) techniques are proposed. A good trade-off between the quality of the output voltage and the partial magnitude of the CMV is achieved in this work. The scheme is proposed for three-level inverter. This work realizes the implementation of Three-level diode clamped MLI for three-phase (Y-Δ) induction motor with the implementation of a space vector modulation technique without any additional control algorithm to reduce CMV within the range ± Vdc/6. The Simulation with a 1HP induction motor drive system is setup in Matlab-2011b and the same results validated effectively by hardware - FPGA-SPARTEN III processor and its shows that the CM voltage is effectively reduced and the maximum output voltage is not affected. © 2012 Institute of Advanced Engineering and Science. All rights reserved.


Seshagiri Rao G.,Marwadi Education Foundation Group of Institution | Raghu S.,Marwadi Education Foundation Group of Institution | Rajasekaran N.,Vellore Institute of Technology
International Journal of Power Electronics and Drive Systems | Year: 2013

In this paper a new method of controller design for boost type dc-dc converter is proposed. A feedback controller for DC-DC boost converter is designed to obtain constant output voltage of 24v.The optimal values of feedback controller is obtained using Genetic Algorithm (GA). Design equations are derived and it is modeled in MATLAB. Extensive simulation is carried out with linear controller parameters and the results are presented. To compare the output of the GA based design and BFOA, the controller parameters are also determined using conventional method (Z-N). Simulation results are validated through hardware results. © 2012 Institute of Advanced Engineering and Science. All rights reserved.

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