The invention discloses an initial failure diagnosis method for an automobile braking system. The method comprises the following specific steps: acquiring and analyzing the brake pedal displacement value x of an automobile in the running process of the automobile; acquiring and calculating an automobile acceleration value y (heading direction acceleration) corresponding to x; constructing and storing a (x, y) sample; continuously acquiring, calculating and storing in the running process of the automobile to obtain a plurality of (x, y) samples; fitting a plurality of (x, y) samples in a certain time period by adopting an exponential function y=a*bx+c; performing braking system degradation state classification on characteristic values (a, b and c) by using a trained support vector machine; judging whether or not the automobile braking system encounters an initial failure based on a degradation state classification result. According to the initial failure diagnosis method, an initial failure judgment is made according to the input and output of the braking system, so that the problem in safety traveling caused by failure of automobile braking can be well solved.
Initial failure diagnosis method for automobile braking system
2015-07-15
Patent
Elektronische Ressource
Englisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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