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Your search keyword '"Palaniappan, Karthik"' showing total 39 results
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39 results on '"Palaniappan, Karthik"'

4. Hardware-in-the-Loop Simulation of High-Power Modular Converters and Drives

Author

Dufour, Christian, Palaniappan, Karthik, Seibel, Brian J., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Zamboni, Walter, editor, and Petrone, Giovanni, editor

Published
2020
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13. Rapid estimation of impaired-aircraft aerodynamic parameters

Author

Kim, Jinwhan, Palaniappan, Karthik, and Menon, P.K.

Subjects
Algorithms -- Analysis, Algorithm, Aerospace and defense industries, Business, Science and technology
Abstract

An estimation of aerodynamic models of impaired aircraft using an innovative differential vortex-lattice method tightly coupled with extended Kalman filters is discussed. The proposed approach significantly reduces the order of the estimation problem by exploiting the prior knowledge about the undamaged aircraft and the detected information on the approximate location and extent of damage. Three different extended Kalman filter formulations are developed and their comparative analyses are performed through numerical simulations. Algorithms given in this paper can be used as the basis for online derivation of an aircraft performance model, which can then form the basis for designing safe landing guidance laws for damaged aircraft. DOI: 10.2514/1.46914

Published
2010

37. An Analysis of Bodies Having Minimum Pressure Drag in Supersonic Flow: Exploring the Nonlinear Domain.

Author

Groth, Clinton, Zingg, David W., Palaniappan, Karthik, and Jameson, Antony

Abstract

One of the most interesting problems in supersonic aerodynamics has been to find profile shapes that have minimum pressure drag, subject to a set of geometric constraints. Considerable work was done in this area in the fifties, all of which relied on a linearized flow model. We revisit this problem using a more sophisticated flow model. It is logical to expect the optimum profile shape to look different. We confirm this, but also note that the differences are very small. We then examine the equations of fluid flow and try to see why the linearized flow model works well for this problem and where the differences come from. [ABSTRACT FROM AUTHOR]

Published
2006
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39. Propagation of updates to replicas using error-correcting codes

Author

Palaniappan, Karthik

Subjects
Computer science
Abstract

With the increase in percentage of replicas of data in the Internet, reducing the amount of bandwidth needed for propagation of updates across the replicas has become a major issue. Objective of our investigation is to design an update propagation mechanism focused on reducing the amount of bandwidth needed to propagate the change across multiple distinct versions of the replicas in a distributed system. We obtain the estimated amount of bytes changed from the user and generate parity information needed to correct these bytes using Error Correcting Codes. Transferring the parity information propagates the update. The updated data can be constructed using the parity information and the outdated data. Our investigation proved that the approach would be bandwidth efficient but computation intensive. We conclude our investigation with an update propagation mechanism that we believe would be less computationally intensive and also reduced bandwidth requirements.

Published
2001

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