Nano Science and Technology Institute
MSM 2000
MSM 2000
Technical Proceedings of the 2000 International Conference on Modeling and Simulation of Microsystems
Chapter 6: Characterization, Parameter Extraction, Calibration

Auto-Regressive Time Series Modeling of Stochastic Surfaces

Authors:B.N.P. Rao and V.S.R. Murti
Affilation:Osmania University, IN
Pages:241 - 244
Keywords:time-series, EDM, stochastic surface profiles
Abstract:Roughness profiles of EDM surfaces were obtained from a perthometer and digitized through AUTO CAD. Fortran program was developed for fitting ARMA (n, n-1) models. A significant observation was that for the sinking electrode type. EDM generally AR (1) or AR (2) models were adequate but for wire cut EDM higher order models, generally ARMA (3,2) and ARMA (4,3) were required. The higher order models indicate additional factors like wire vibration influencing the dynamics of wire EDM process.
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