Generation of driving profile on a multi-axial vibration table for vibration fatigue testing

A multi-axial simulation table (MAST) is widely used for vibration fatigue testing; it reliably reproduces the operational multi-axial motion of a specimen. The main concern in this multi-axial testing is to determine the driving profile because this profile guarantees the service life cycle of a specimen. This paper presents a method for generating a driving profile using a combination of measured acceleration responses under special events. To explain this method clearly, vehicle components are selected as target components, and the corresponding driving profile of each component is derived using the proposed method.

► Fatigue damage of measured acceleration is calculated using energy isoclines.
► Driving profile of MAST system is derived from the optimal algorithm.
► The measured acceleration data are converted to energy matrix.
► The optimal algorithm determines the combination of special events as driving profile.
► The maximum relative error of fatigue damage is about 3% at practical example.