The fesibility of frame vibration control in automotive vehicles using active hydraulic engine mounts is investigated. The focus of the study is on engine idle conditions. A 38th dynamic model of a simplified vehicle system is used. The simplified system consists of a powertrain and a bare chassis supported by air pillow mounts at four corners. A modified LQG (linear-quadratic-Gaussian) control design method was used to synthesize a reduced order controller with improvd robustness to harmonic disturbances. This modified LQG controller design is compared to a standard LQG controller. First, the conceptual implementation of active hydraulic mounts is proposed. The proposed mounts use a close-coupled servo-valve for high speed fluid injection. The active mounts are capable of producing either attractive or repulsive forces between the powertrain and chassis. Predictions are made for levels of frame vibration reduction and actuator power consumption from simulation of closed-loop system responses. These results provide an estimate of hardware requirements for the implementation of an active mount system. Various issues in conrol design for flexible structures are addressed. Chief among these are the issues of model order reduction and controller order reduction. Other issues addressed are disturbance robustness and paramter robustness.


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    Title :

    Active frame vibration control for automotive vehicles with hydraulic engine mounts


    Additional title:

    Akive Steuerung der Rahmenschwingungen in einem Kraftfahrzeug durch hydraulische Motorbefestigungselemente


    Contributors:
    Graf, P.L. (author) / Shoureshi, R. (author) / Starkey, J. (author) / Novotny, D. (author) / Stevens, R.W. (author)

    Published in:

    SAE-Papers ; Mar ; 1-9


    Publication date :

    1988


    Size :

    9 Seiten, 7 Bilder, 1 Tabelle, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Active frame vibration control for automotive vehicles with hydraulic engine mounts

    Graf,P.L. / Novotny,D. / Shroureshi,R. et al. | Automotive engineering | 1988


    Active Frame Vibration Control for Automotive Vehicles with Hydraulic Engine Mounts

    Novotny, D. / Starkey, John / Graf, Peter L. et al. | SAE Technical Papers | 1988


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    Active engine mounts for vehicles

    Swanson, D.A. | Tema Archive | 1993