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.


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    Title :

    Performance enhancement of limited-bandwidth active automotive suspensions by road preview


    Additional title:

    Leistungssteigerung bei einer aktiven Kraftfahrzeug-Radaufhängung mit begrenzter Frequenzbandbreite durch Vorhersage der Straßenqualität


    Contributors:
    Prokop, G. (author) / Sharp, R.S. (author)

    Published in:

    Publication date :

    1995


    Size :

    9 Seiten, 10 Bilder, 1 Tabelle, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    On the Preview Control of Limited Bandwidth Vehicle Suspensions

    Pilbeam, C / Sharp, R S | SAGE Publications | 1993


    On the preview control of limited bandwidth vehicle suspensions

    Pilbneam,C. / Sharp,R.S. / Cranfield Inst.of Technology et al. | Automotive engineering | 1993


    On the preview control of limited bandwidth vehicle suspensions

    Pilbeam, C. / Sharp, R.S. | Tema Archive | 1993


    Optimization and performance enhancement of active suspensions for automobiles under preview of the road

    Louam,N. / Wilson,D.A. / Sharp,R.S. et al. | Automotive engineering | 1992