Vibration induced from road surface has an impact on the durability and reliability\nof electrical and mechanical components attached on the vehicle. There is little research\npublished relevant to the durability assessment of a flywheel energy recovery system installed\non city and district buses. Relevant international standards and legislations were reviewed and\nlarge discrepancy was found among them, in addition, there are no standards exclusively\ndeveloped for kinetic energy recovery systems on vehicles. This paper describes the\nexperimentation of assessment of road surface vibration input to the flywheel on a bus as\nobtained at the MIRA Proving Ground. Power density spectra have been developed based on\nthe raw data obtained during the experimentation. Validation of this model will be carried out\nusing accelerated life time tests that will be carried out on a shaker rig using an accumulated\nprofile based on the theory of fatigue damage equivalence in time and frequency domain\naligned with the model predictions.
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