1.4.2.1 Parametric Study - Automobile Suspension
In the following section, the effects of modifying the essential parameters of the dual-mass model on the body acceleration are investigated. Even without a human evaluation of the seat suspension and vibration, this investigation can be considered as a rough assessment criterion for the suspension comfort and relative (specific) dynamic wheel load, i. e. road grip of the wheels (driving safety).
The equations of vibrations for the dual-mass model are constructed in MATLAB and excited by an artificially generated road signal. On the basis of the simulation results, the spectral power densities of body acceleration and dynamic wheel load are determined. The road signal used for simulation is shown in the figure as displacement-time function as well as time-frequency-dependent power density.