A single-wheel suspension car model is considered. A controller is designed for a quarter-car model under industrial performance specifications. The benefits of controlled semi-active suspensions compared to passive ones are here emphasized. The contribution relies on robust analysis of a controller which improves comfort and road holding of the car under industrial specifications. Simulations on an exact nonlinear model of the suspension are performed for control validation. The robust stability and performance analysis points out that the controller remains stable for large uncertainty (in particular 10 % for the sprung mass). Concerning robust performance, the performance specifications are kept for parameter uncertainties up to 22 % for the sprung mass and 7.5 % for the remaining masses and stiffness. This is quite good as the sprung mass can be measured in practice when the car is stopped. By applying the controllers on a exact nonlinear simulation model, the improvement in comfort is emphasized. Road holding is, according to the industrial performance specifications, almost equivalent to the passive suspension case. The results thus show the interest of control for semi-active car suspensions.
Robust H infinity control of quarter-car semi-active suspensions
Robuste H<sub>unendlich</sub>-Regelung der quasi-aktiven Radaufhängung eines Einradsystems
2003
6 Seiten, 15 Bilder, 10 Quellen
Conference paper
Storage medium
English
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