In a rail vehicle (100) a control unit (140) controls a set of brake/ traction units (101, 161; 102, 162; 103, 163; 104, 164) by control signals (B1, A1; B2, A2; B3, A3; B4, A4) to apply a respective brake/traction force to a respective wheel axle (131, 132, 133, 134 to cause retardation/acceleration of the rail vehicle (100). The control unit (140) obtains a first wheel speed signal (ω1) indicating a rotational speed of at least one first wheel (121), and obtains a second wheel speed signal (ωa) indicating an average rotational speed of at least one second wheel (122, 123, 124). The control unit (140) produces a first control signal (BF; A1) to the first brake/ traction unit (101, 161) such that this unit applies a gradually increasing brake/traction force to the first wheel axle (131) until an absolute difference (|ω1 - ωa|) between the first and second wheel speed signals (ω1; ωa) exceeds a threshold value. In response to the absolute difference (|ω1 - ωa|) exceeding the threshold value, the control unit (140) determines a parameter (µm) reflecting a friction coefficient (µe) between the wheels (121, 122, 123, 124) and a set of rails (181, 182) upon which the rail vehicle (100) travels.
FRICTION TESTING SYSTEM, COMPUTER-IMPLEMENTED FRICTION-TESTING METHOD FOR A RAIL VEHICLE, COMPUTER PROGRAM AND NON-VOLATILE DATA CARRIER
REIBUNGSTESTSYSTEM, COMPUTER-IMPLEMENTIERTES REIBUNGSTESTVERFAHREN FÜR SCHIENENFAHRZEUGE, COMPUTERPROGRAMM UND NICHTFLÜCHTIGER DATENTRÄGER
SYSTÈME DE TEST DE FRICTION, PROCÉDÉ DE TEST DE FRICTION MIS EN OEUVRE PAR ORDINATEUR POUR UN VÉHICULE FERROVIAIRE, PROGRAMME INFORMATIQUE ET SUPPORT DE DONNÉES NON VOLATILES
2023-11-15
Patent
Elektronische Ressource
Englisch
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