College of Engineering, Pune

About: College of Engineering, Pune is a based out in . It is known for research contribution in the topics: Sliding mode control & Control theory. The organization has 4264 authors who have published 3492 publications receiving 19371 citations. The organization is also known as: COEP.

Dynamic Nonlinear Gradient Observer based Extremum Seeking Control for Optimum Braking

Abstract: The application of extremum seeking control (ESC) algorithm to antilock braking systems (ABSs) is attractive for maximizing the longitudinal frictional force. Most currently reported results suffer from the drawback of steady state oscillations around the extremum or the need to have the gradient information. In this paper, a new ESC algorithm is proposed for application to ABSs to overcome these two drawbacks. The proposed algorithm is based on a novel dynamic nonlinear gradient observer (DNGO) and a longitudinal frictional force estimator. The performance and the ultimate boundedness of the proposed ESC, DNGO and the force estimator are analysed. The proposed method is validated by simulation for dry and wet road surfaces and compared with two established results. The method is further validated on an experimental setup in the laboratory for dry and oily surfaces.

An adaptive distance relay protection scheme for enhanced protection security

Abstract: The advantage of distance relay to provide remote backup protection is a matter of concern to power system security under system stressed conditions. The zone 3 of the distance relay is prone to mal-operate under well known system stresses such as power swing, load encroachment and voltage stress; causing undesired relay operation which may further lead to system collapse. This paper proposes an adaptive distance protection scheme based on the decomposition of the current and voltage signals into carrier signals and modulating signals using the amplitude demodulation technique. The magnitudes of the carrier signals are controlled adaptively by a magnitude monitoring function based on the information content in the modulating signal. During power system stressed conditions, the positive sequence impedance trajectory is restrained from entering the distance relay trip zones until a fault occurs on the system. The proposed algorithm is tested on a two area − 4 generator − 10 bus system modeled in ATP-EMTP environment and the simulation results show the reliability of the scheme.

Effective energy conservation for the agricultural sector using line start permanent magnet synchronous motors

Abstract: The growing demand for electricity in developing countries calls for a continuous increase in the installed capacity. However, with installed capacity unable to meet the pace of increase in demand, increase in efficiency of energy conversion devices is a vital requirement. The present paper considers one such energy improvement method in the form of a Line Start Permanent Magnet Synchronous Motor (LSPMSM) which is intended as a substitute for induction motors in developing countries. The economic benefits due to the utilization of such machines, their commercial viability and their life cycle costing have all been considered here. The paper also presents theoretical results obtained for various rotor configurations of the LSPMSM and practical results for the selected spoke type rotor geometry.

A review of Augmented Reality and its application in context aware library system

Abstract: Augmented Reality has revolutionized the way of looking at actuality. The colossal developments in this area have led to visualizations beyond desktop. Unreal objects can be augmented on real surfaces. Augmented Reality has converged the knowledge of computer vision, virtual reality, image-processing, human-to-computer interaction and more such areas. It has found applications in various expanses like Games, Entertainment, Military, Navigation and many more. One such application could be in Library Management System. Earlier systems for book tracking involved immobile computers that only had the shelf numbers nested with book id to locate a book. A borrower needed to ask the Librarian/support staff to look up the shelf number from the system so as to find a book or simply do it manually by himself by searching each shelf. The application of Augmented Reality in Library Administration is useful in automating the proximity location tracking of a book and providing alternatives to the borrower in the books context. The borrower is navigated through the library till he/she reaches the shelf where the book is kept. The spine of the book serves as the index of the required book and contextual information is augmented once the book is located. Thus Augmented Reality can prove immensely helpful for Library Administration.