Wheel hop estimation on rough roads
The vertical translation of the unsprung masses of a vehicle on a rough road is estimated through the use of a Kalman filter. The estimator requires only easily measured states and parameters. The estimator is first evaluated against simulation results with acceptable per-formance. A novel stereographic camera system is then used to experimentally validate the estimator’s performance. The estimator is able to estimate the vertical wheel hop, with a slight discrepancy at frequencies below 2 Hz. It is recommended that an estimator model with more degrees of freedom be used to improve the performance.