Abstract
This paper describes malfunction of vehicle suspension by wavelet transform. Using two degree of freedom vertical vibration model of the rolling stock, the signal with the signal in which the amplitude changed was created. By the Wavelet transformation, it was tried that the weak and abnormal signal which is buried under the noise was detected. Acceleration signal including malfunction is generated by 2D of vehicle model. It is pointed out that the detection of malfunction under measurement noise can be possible by wavelet transform.
