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- 저자 : Mukul Kumar Gupta (검색결과 3 건)
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Advances in Floating Aerogenerators: Present Status and Future
Amit Kumar Mondal,Surajit Mondal,Vindhya Devalla,Paawan Sharma,Mukul Kumar Gupta 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.11
High altitude winds are considered to be the most favorable source of renewable energy in the future. In this paper, review has been conducted on harnessing of high altitude wind energy via floating type aero-generators. This new generation of systems employs tethered wings, aircrafts, multi-copters, balloons in order to harness the higher atmospheric winds. A number of systems based on different concepts have been analyzed and tested from mid-seventies, with a rapid acceleration in last couple of years. This paper presents a comprehensive overview of different technologies that have been designed/ built to harvest the energy of high altitude winds, highlighting the accomplished results, technological issues and classification of such systems have been proposed on the basis of their working and design. Apart from the Airborne Wind Energy or High-Altitude Wind Energy based systems, a brief overview on offshore floating wind turbines have also been provided.
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Spetroscopic ellipsometry study on electrical and elemental properties of Sb-doped ZnO thin films
Sushil Kumar Pandey,Vishnu Awasthi,Shruti Verma,Mukul Gupta,Shaibal Mukherjee 한국물리학회 2015 Current Applied Physics Vol.15 No.4
Room-temperature spectroscopic ellipsometry data has been analyzed to determine the complex dielectric functions, ε(E) = ε1(E) + iε2(E) of as-deposited Sb-doped ZnO (SZO) thin films grown on n- Si(100) substrates by dual ion beam sputtering deposition system for different growth temperatures (Tg). The dielectric functions have been obtained from ellipsometry data analyses using Cody-Lorentz oscillator in the GenOsc model. A gradual reduction in the value of electron concentration and finally the conversion of doping characteristics from donor type to acceptor type was observed with the rise in Tg. This, in turn, resulted in the decline of broadening of ε1 peaks, and hence in the increase of excitonic lifetime. Optical band-gap energy was observed to decrease with increase in Tg from 200 to 300℃, and then rise continuously with further increase in Tg. X-ray diffraction measurements showed that all SZO films had (002) preferred crystal orientation. Hall measurement and X-ray photoelectron spectroscopy analysis confirmed that the change in the electrical conduction from n-to p-type was due to the enhancement in the value of Sb5+/Sb3+ ratio and SbZn-2VZn complex formation in SZO films.
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Intelligent control of robotic manipulators: a comprehensive review
Devendra Rawat,Mukul Kumar Gupta,Abhinav Sharma 대한공간정보학회 2023 Spatial Information Research Vol.31 No.3
Technological advancements in robotics significantly impact the design of robotic manipulators and their control. Manipulators find applications in electrical, mechanical, and process industries to reduce labor and improve accuracy. Controlling manipulators is challenging because of their complex dynamics and nonlinear properties. Researchers are exploring many ways to implement the effective control method, including classical and modern techniques. In all the applications, robotic manipulators interact with the real world. Therefore, they require an understanding of input–output relations, which raises the need for intelligent control methods. The revolutionized growth in artificial intelligence has significantly influenced robotic manipulators' control. This paper presents a detailed review of intelligent control techniques implemented on robotic manipulator systems. These intelligent control methods include artificial neural networks, fuzzy logic control, expert systems, metaheuristic algorithm, machine learning control, etc. These intelligent methods for robotic manipulators have gained more attention because they emulate human intelligence, which finds application in diverse fields of science and engineering. In this paper, authors have investigated and compared metaheuristic algorithm and their application in robotic manipulators.
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