The control of an active suspension system is dealt with. A limited-bandwidth quarter-car system incorporates an actuator in series with a passive spring, the combination being in parallel with a passive damper. Control design is carried out using discrete-time linear quadratic regulator theory with try deflection, suspension working space, vertical body acceleration and control demand. A preview control is realised by means of a sensor, which detects the roughness of the road surface some sampling time of the control ahead. The control signal consists of two parts, state feedback control and preview feedforward control. Several simulations illustrate the method. By increasing preview time, the cost function of the control performance can be reduced until it reaches a saturation value, which depends on the actuator bandwidth chosen. Increasing the actuator bandwidth beyond a certain value has only a small influence on the preview time needed for the diminishing returns to set in. Improving the road holding requires fast actuators, but comparatively short distances. Ride comfort can be influenced by a rather slow controller, but requires a long preview time.
Performance enhancement of limited-bandwidth active automotive suspensions by road preview
Leistungssteigerung bei einer aktiven Kraftfahrzeug-Radaufhängung mit begrenzter Frequenzbandbreite durch Vorhersage der Straßenqualität
IEE Proceedings - Control Theory and Applications ; 142 , 2 ; 140-148
1995
9 Seiten, 10 Bilder, 1 Tabelle, 18 Quellen
Article (Journal)
English
On the preview control of limited bandwidth vehicle suspensions
Online Contents | 1993
|On the Preview Control of Limited Bandwidth Vehicle Suspensions
SAGE Publications | 1993
|On the preview control of limited bandwidth vehicle suspensions
Automotive engineering | 1993
|On the preview control of limited bandwidth vehicle suspensions
Tema Archive | 1993
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