Singh R.,GND Engineering College
International Journal of Materials Engineering Innovation | Year: 2011
The purpose of the present investigations is to study the process capability of ultrasonic machining (USM) for titanium and its alloys. For the analysis purpose, Taguchi model of material removal rate (MRR), tool wear rate (TWR) and surface roughness (SR) for USM of titanium and its alloys has been used. Relationships between MRR, TWR, SR and other controllable machining parameters (power rating, tool type, slurry concentration, slurry type, slurry temperature and slurry size) have been deduced. The results of study suggest that the USM process lies in ±4.5 sigma (σ) limit as regard to MRR and TWR is concerned. For SR process capability is ±5.1 σ at the best settings of input parameters while machining of titanium alloys. © 2011 Inderscience Enterprises Ltd.
Kashappa N.,GND Engineering College |
Ramesh Reddy K.,GNITS
Research Journal of Applied Sciences, Engineering and Technology | Year: 2011
This study deals with comparison of 3-level inverter- fed induction motor drive with 9-level inverterfed induction motor drive. A conventional Voltage Source Inverter (VSI) fed induction motor drive is modelled and simulated using matlab simulink and the results are presented. 9-level inverter is also simulated and the corresponding results are presented. The FFT spectrums for the outputs are analyzed to study the reduction in the harmonics. © Maxwell Scientific Organization, 2011.
Krishnaiah T.,GND Engineering College |
Rao S.S.,National Institute of Technology Warangal |
Madhumurthy K.,National Institute of Technology Warangal
Energy Sources, Part B: Economics, Planning and Policy | Year: 2012
In this article, the techno-economic viability of a Stirling dish power generation system is explored and compared with a diesel generator for Indian conditions. A life cycle cost analysis is carried out over the system lifetime. From the life cycle cost, the unit cost of energy generation is estimated to be INR10.35/kWh for a Stirling dish system and INR11.40/kWh for a diesel generator. The payback period is computed as 9.5 yr for the Stirling dish system and 4.4 yr for the diesel generator. Then sensitivity analyses are presented, which further explore system comparisons as certain base-case assumptions like capital cost, diesel fuel cost, discount rate, and fuel escalation rate are varied. The results show the Stirling dish power generation system to be more cost-effective at low-power ranges of electrical energy supply to the rural communities in India. © 2012 Copyright Taylor and Francis Group, LLC.
Kapoor J.,GND Engineering College |
Singh S.,GND Engineering College |
Khamba J.S.,Punjabi University
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science | Year: 2012
In this article, the effect of cryogenic treatment on the brass wire electrode used in wire electrical discharge machining is investigated. Deep cryogenic (-184 C) treatment is given to the brass wire electrode. The microstructure and crystalline phase of deep and non-cryogenic treated brass wire electrodes is observed by scanning electron microscope and X-Ray diffraction. The experimental results show that the structure is more refined in deep cryogenic treatment as compared to non-cryogenic treatment. The electrical conductivity of deep electrode is greatly improved. The effect of deep cryogenic treatment on the brass wire electrode is also investigated for the performance of wire electrical discharge machining. Taguchi experimental design has been applied to investigate the optimal parameters for maximum material removal rate. The ANOVA analysis indicates that type of wire, pulse width, time between two pulses and wire tension are significant factors for maximization of material removal rate. The cryogenic treatment results in improved material removal rate. © IMechE 2012.
Veerendra,GND Engineering College |
Bakhar M.,GND Engineering College |
Vani R.M.,Gulbarga University |
Hunagund P.V.,Gulbarga University
IEEE MTT-S International Microwave and RF Conference 2014, IMaRC 2014 - Collocated with Intemational Symposium on Microwaves, ISM 2014 | Year: 2015
This paper presents the implementation and optimization of Modified MUtiple Signal Classification algorithm for smart antenna systems. In this work proposed algorithm can be used for direction of arrival (DOA) estimation of coherent signal sources with high resolution, high stability in real time which enhances the performance of DOA estimation. The proposed algorithm makes the accurate DOA estimation for less array elements and snapshots under low SNR. This reduces the computational complexity, enhances the system efficiency and makes it possible to use in performance driven communication system. This paper also presents the optimization of several parameters of proposed algorithm suitable for practical application. © 2014 IEEE.