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Wheel-rail contact parameters estimation for a conical solid-axle railway wheelset using least-absolute error with variable forgetting factor method

Selamat, Hazlina and Yusof, Rubiyah (2009) Wheel-rail contact parameters estimation for a conical solid-axle railway wheelset using least-absolute error with variable forgetting factor method. In: International Conference on Industrial Technology (IEEE-ICIT 2009), 2009, Gippsland, Victoria, Australia.

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Official URL: http://dx.doi.org/10.1109/ICIT.2009.4939485

Abstract

This paper addresses the specific problem of estimating the ‘conicity’ and ‘creep coefficients’ values of a conical railway wheelset, which vary significantly as the vehicle runs along straight tracks with lateral irregularities. The performances of the continuous-time (C-T) least-squares error (LSE), least-absolute error (LAE) and least-absolute error with variable forgetting factor (LAE+VFF) estimators that employ the linear integral filter (LIF) method are compared. For each experiment, the LAE + VFF estimator performed the best because the algorithm combines the least-absolute error identification that has an instrumental variable element to overcome estimation bias problem and the variable forgetting factor for fast tracking and smooth steady-state estimation. The estimator, designed based on a fifth order wheelset model was then directly applied to a 14th-order two-axle railway vehicle. The LAE + VFF estimator produced similar estimated front and rear wheelset parameters values, and hence simplifying the estimation process of the more complex 2-axle railway vehicle model.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:16118
Deposited By: Liza Porijo
Deposited On:18 Oct 2011 09:57
Last Modified:18 Oct 2011 09:57

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