Verfahren zur Regelung der Kontaktkraft zwischen Stromabnehmer und Fahrdraht

A method for regulating the contact force between a pentograph and an overhead cable, by means of at least two contact force measuring sensors for determining the contact force is disclosed, whereby the drop-out of a contact force measuring sensor is determined from the contact force measured signals (y1, y2). A comparison can be made between the current average quadratic deviation ((a) or cov(ys)) derived from the measured values (y1, y2) and the average quadratic deviation in an undisturbed nominal case ((b) or con(ys)o) and the above used for detection of the drop-out of a contact force measuring sensor, or, alternatively a comparison can be made between the current average amount of the derivation (PT1(|ys-X|2.5s)) derived from the measured values (y1, y2) and the average amount of the deviation in the undisturbed nominal case (PT1(|ys-X|2.5s)q) and the above used for detection of the drop-out of a contact force measuring sensor.