| 摘要 |
The present invention refers to a control system for improving comfort and maneuverability of automotive vehicles. The control system uses the measurements of the displacement variables of the suspended mass and the displacement of the unsuspended mass. The control system reduces the vertical acceleration of the suspended mass according to the index of desired comfort, maintaining a safe deflection according to the suspension characteristics (maximum travel of the suspension) without affecting the maneuverability of the suspension by limiting the deflection of the tires. The control system uses the estimation of the frequency in real time and the application of a dampener predetermined for predetermined frequency bandwidths. The estimation of the frequency is obtained by the division of the standards of order 2 of two measured signals. The standard of each signal is obtained by an arrangement of the last n values measured from the signal. The signals are the deflection of the suspensi on and the relative speed of the suspension. The estimated frequency is compared to some frequency intervals. The frequency intervals have associated a dampening coefficient. When the estimated frequency and the frequency corresponding to a control target are coincident, the dampening is applied and linked to that estimated frequency. The algorithm allows at least two control targets, which are comfort and maneuverability, to be controlled with a low computational cost. |
