The analysis of bus air spring condition influence upon the vibration signals at bus frame

Abstract

The paper analyses the spread of vibration intensity through the bus frame mechanical structure. The research has been completed upon application of the theory of covariance functions. Results of measuring the intensity of vibrations at fixed bus framepoints were recorded on the time scale in the form of data arrays (matrixes). The authors have completed the estimation of covariance functions by measuring the intensity of vibrations between the arrays of digital results and auto-covariance functions of single arrays upon changing the quantization interval on the time scale. The research results enable to define if the solidity of bus frame is disordered and to assess the technical condition of pneumatic suspension considering the vibration of frame points. Dangerous zones of bus suspension and reliability level of bus exploitation can be determined by application of these results.