It is known that road vehicle suspension systems have to satisfy conflicting design requirements. For ride comfort the suspension should isolate the body from high frequency road surface excitation. On the other hand, requirements on handling ability imply that at lower frequencies the body and the wheel should closely follow the vertical inputs due to the road surface. In addition, the suspension has to control body motion due to changes in payload, forces from braking, curving and also in aerodynamic forces. The compromise among these design requirements can significantly be achieved by application of active elements in the suspension systems, since active suspensions can remove some inherent restrictions posessed by passive systems. In the design of active suspensions the vehicle and suspension systems are usually described by a system of linear differential equations that can be converted to state-space form. The control input to this dynamic model is provided by some actuates e.g. servovalves and the hydraulic cylinders, and the disturbance input is the road surface excitation. Using this modeling concept, the active system is realised by variations of linear state variable feedback. The results published in the literature differ in the complexity of state-space model describing the body and the suspension system of the vehicle, and also on choosing a particular observer configuration and state feedback law. This paper discusses the active suspension system design from an eigenstructure assignment viewpoint. The effect of changes in the design parameter will be illustrated by computer simulations.
Design of active suspension system for road vehicles: An eigenstructure assignement approach
Entwurf eines aktiven Aufhängungssystems für Kraftfahrzeuge. Eine abnahmereife Lösung für die Eigenstruktur
1990
6 Seiten, 5 Bilder, 8 Quellen
Aufsatz (Konferenz)
Englisch
Design of active suspension system for road vehicles:an eigenstructure assignement approach
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