Online detection method and device for running stability parameters of railway vehicle

The invention relates to an online detection method and device for running stability parameters of a railway vehicle. The method comprises the following steps: acquiring a strain data segment of a force measuring wheel set of the railway vehicle; processing the strain data segment to obtain a limited amplitude; performing amplitude limiting filtering processing on the strain data segment accordingto the limited amplitude to obtain amplitude limiting filtering data; carrying out median filtering processing to obtain median filtering data; obtaining a zero line value according to the median filtering data; obtaining null shift correction data according to the null line value null shift correction median filtering data; performing absolute value processing on the null drift correction data to obtain positive waveform data; searching all wave peak values in the positive waveform data to obtain effective data; performing calibration processing on the effective data to obtain calibration data; calculating vehicle o