Papers by Keyword: Local Mode

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Authors: Zhi Jian Liu, Rong Huang, Shu Ming Zhou, Qi Song
Abstract: Coherency is used to characterize the degree of confusion between generators which oscillate against each other, so it can judge the process which generators oscillate from local mode to inter-area mode. The coherency is the value of the direction cosine by using angle of the generators. when the direction cosines of two generator is 1 that indicates the oscillation direction between the two generators is inter-area oscillation mode; when the direction cosines of two generator is-1 that indicates the oscillation direction between the two generators is local oscillation mode. Coherency is affected by speed governing system and excitation system of generator.Using two area systems verifies the theoretical analysis is correct.
136
Authors: Xiang Sheng Gao, Yi Du Zhang, Qiong Wu
Abstract: A dynamic model of the spindle-cutter coupling system is established including the gyroscopic effects and shear deformation. Dynamic characteristic of the system is analyzed by utilizing the whole transfer matrix method (WTMM) based on the Riccati transformation, and strain energy distribution of the system is estimated. Dynamic characteristic of the system is optimized by univariate search technique. And optimal path in the system optimization is provided. According to the optimal path, a method of local mode elimination by decreasing stickout length of the milling cutter is proposed. The calculation results indicate that preload level of front bearing and rear bearing is the key factor of dynamic optimization after local mode elimination.
17
Authors: M.J. Romčević, D.R. Khokhlov, N.Ž Romčević
231
Authors: Alison Mainwood, Alan T. Collins, Peter Woad
29
Authors: H.P. Gislason, K. Leosson, H. Svavarsson, Kimmo Saarinen, A. Mari
1813
Authors: Brian Bech Nielsen, K. Tanderup, M. Budde, K. Bonde Nielsen, J. Lennart Lindström, R. Jones, Sven Öberg, B. Hourahine, Patrick R. Briddon
391
Authors: B. Pajot, E. Artacho, Lyudmila I. Khirunenko, Kohei Itho, Eugene E. Haller
41
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