Insight into the design of a vibration isolation system for a neonatal transport cart is presented with a simple 2 dof system model. Parametric studies performed with these models show that a passive isolation system provides stable dynamic behavior without sufficient damping. It was also found that some limited control over isolator frequency can be achieved by changing the pneumatic pressure of air-spring isolators. The passive system configuration can greatly affect the response amplitude at lower frequencies (< 10 Hz). It was found that the configuration 2 provided the best isolation characteristics for a passive system among the test cases. In terms of active control, the effect of varying both air-spring stiffness and derivative gain results in a trade-off in the damping associated with the first and second modes. Although a loss of stability occurs it is not in the range of operation for the system. Varying air-spring stiffness and the proportional gain produced similar results. Based on this study, a prototype system developed for passive isolation will be further implemented, tested to confirm system behavior and tested in clinical trials. A vibration isolation system with a lower vertical profile than the current passive solution would be beneficial in terms of ergonomics for medical personnel. The stability of the isolette in tipping during braking is to be further investigated. One damping solution of interest is to apply magneto-rheological (MR) fluid-based dampers for vibration isolation in the neonatal transport system and is a matter of future research interest to the authors.


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    Titel :

    System design for isolation of a neonatal transport unit using passive and semi-active control strategies


    Weitere Titelangaben:

    Systementwurf für einen Transportwagen für Neugeborene mit passiv und halbaktiv geregelter Schwingungsisolierung


    Beteiligte:

    Erschienen in:

    Journal of Sound and Vibration ; 286 , 1/2 ; 382-394


    Erscheinungsdatum :

    2005


    Format / Umfang :

    13 Seiten, 6 Bilder, 2 Tabellen, 14 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch