In this paper, the ride heights (roll, pitch, and heave) and normal force distribution control problem is considered for a nonlinear vehicle model. Using four active suspension actuators, it is possible to drive the ride heights and the normal force distribution factor to their desired set points at steady state. Regulating the normal force distribution factor for a suitable coefficient t, one can influence the understeer/oversteer characteristics of the vehicle favorably. As a result, the closed-loop system attains a less oscillatory yaw rate behavior than the open-loop system. In order to solve the regulation problem, an Hinfinity optimal design approach is utilized. The driver's steering input is modeled as a plant disturbance because it has a considerable effect on the regulated variables. As an inherent disadvantage of the (output feedback) Hinfinity design procedure the resulting controller has the same order as the open-loop system, which is 21.
Optimal design of a normal force controller
Die optimale Auslegung eines Normalkraftreglers für Fahrwerksunruhen
1995
6 Seiten, 9 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
Optimal Design of a Normal Force Controller
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