This contribution introduces a virtual measurement device for the reconstruction of the in practice unmeasureable rail-wheel contact forces. For this aim the Proportional-Integral (PI)-Observer is used. Then, the concept of a measurement sleeve at the axle bearing is shown. With the displacement measurements resulting from the sleeve using the PI-Observer, an estimation of the tangential contact force and the dynamic normal force is possible. Using the simulation of the rail-wheel contact, the feasibility of the estimation of the contact force behavior is shown. As an outlook for further applications of the PI-Observer in the context of rail-wheel contact force estimation, the reconstruction of contact forces by using acceleration measurements is demonstrated by an example of an elastic beam for the first time.
Reconstruction of the dynamic rail-wheel contact forces
2003
9 Seiten, 12 Quellen
Aufsatz (Konferenz)
Englisch
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