Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Comparative analysis of fuzzy and LQR for water level control of U-tube steam generator

Abstract: The steam generator water level is an important process parameter in nuclear power stations. It is essential to provide continuous heat sink to reactor through primary heat transport system and to ensure reactor safety. While on power or during reactor shutdown, the level control system removes the decay heat from the reactor core via boiler. At low reactor power the level control is very much difficult due to unreliable flow measurement and non-minimum phase characteristics. In order to overcome shortcomings of the PID controller, a fuzzy controller has been proposed by using the experiences of plant operators. In this work, a novel concept of Linear Quadratic Regulator (LQR) control is proposed to achieve efficient control. A simulation model for steam generator in nuclear power plant as an example has been given to verify the effectiveness of fuzzy and LQR controller.

Design and simulation of Pt-based microhotplate, and fabrication of suspended dielectric membrane by bulk micromachining

Abstract: The paper presents the design and simulation of double spiral Pt-based microhotplate (MHP) for gas sensing application. A platinum resistor of 52 Ω has been designed and simulated on a 0.3 micron thick SiO 2 suspended membrane of size 40 × 40 μm2 using ANSYS. The SiO 2 membrane of size 40 × 40 μμm 2 and thickness 0.3 micron has been fabricated successfully by bulk micromachining in <100< orientation P-type silicon using 25% tetra methyl ammonium hydroxide (TMAH) solution. The simulated temperature and transit time response of microhotplate were obtained as 600.5 °C and 0.2 ms respectively at 4.8 mW power consumption.

Design and mathematical model of a ZnO-based MEMS acoustic sensor

Abstract: The paper presents the design and mathematical model of a ZnO-based MEMS acoustic sensor. The structure consists with a 3.0 μm thick piezoelectric ZnO layer sandwiched between a pair of aluminum electrodes on a 30 μm thick silicon diaphragm. The size of silicon diaphragm is 3.1 x 3.1 mm 2 . Resonance frequency of the structure is determined using harmonic analysis by ANSYS and found to be 41.8 KHz. Sensitivity of acoustic sensor with and without the effect of residual stress are obtained as 334.7μV/Pa and 221.6μV/Pa respectively. The proposed model of the acoustic sensor operated over a wide frequency range from 30 Hz to 8 kHz.

Eastern Arabic Numerals: A Stand out from Other Jargons

Abstract: Handwriting recognition is to accept and illustrate comprehensible handwritten input and Optical character recognition (OCR) is one of the approaches of loading texts in order to electronically search texts, which is going to be used in the machine learning techniques. Focusing on the Arabic numerals which are used in numerous languages like Farsi and Urdu still requires profound analysis. Whereas, Persian and Urdu languages include a variant of Eastern Arabic numerals and which is viewed as East Arabic-Indic. In this paper recognition of Eastern Arabic numerals is shown by OCR technique leading to accuracy of 82.91%.

Combustion, Performance and Emission Analysis of Diesel-Methanol Fuel Blend in CI Engine

Abstract: Due to serious environmental problems and the rising cost of fossil fuels, a lot of research work is going on for cleaner alternative fuels to improve engine performance and at the same time reduce emissions. Nowadays, methanol has emerged as a very strong alternative bio-fuel, which has a high potential to reduce subordination to crude oil and atmospheric pollution. Methanol also has inconsistent Physico-chemical and combustion properties, making it a more appropriate additive fuel than other available organic fuel additives for CI engines. Therefore, the aim of the present study is to review the impact of different methanol-diesel blends on CI engine combustion, emission, and performance characteristics. The combustion characteristics of the engine are evaluated by the heat release curve measured inside the cylinder pressure data under various engine operating conditions. Performance characteristics are also discussed for different methanol-diesel blends at various CI engine parameters. Smoke, CO, HC, NOx, and PM emissions of CI engine have been discussed with different engine parameters using methanol–diesel blends. The role of injection timing on engine emissions has been also discussed.