This thesis presents a control algorithm for semi-active suspensions to reduce the braking distance of passenger cars. Active shock absorbers are controlled and used to influence the vertical dynamics during ABS-controlled full braking. The core of the approach presented in this paper is based on a switching control logic. The control algorithm is implemented in a compact class passenger car. Test drives on a real road, using a braking machine for reproducibility reasons, have been executed. It could be shown that it is possible to reduce the braking distance by affecting on the vertical dynamics of a passenger car in general. This is the first experimental result of this kind published ever. The amount of reduction depends on the height profile of the testing track chosen and on the initial velocity. On a road with an uneveness comparable to the one on a typical German Autobahn an average reduction of 1-2 %, compared to the best passive damping, was achieved.
Reducing braking distance by control of semi-active suspension
Reduzierung des Bremsweges durch Regelung einer halbaktiven Aufhängung
2007
180 Seiten, 76 Bilder, 9 Tabellen, Quellen
Theses
German
Reducing braking distance by control of semi-active suspension
TIBKAT | 2007
|Automotive engineering | 2008
|British Library Conference Proceedings | 2008
|Improving braking performance by control of semi-active suspension
Tema Archive | 2007
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