The performance of the passive and semi-active secondary airspring suspension on rail passenger vehicles has been examined theoretically and experimentally. The semi-active damper concept was realized in a laboratory test by a butterfly valve for which a practical position control logic was developed. Simulation and test results have shown that once the orifice damping is made variable, the r.m.s. vehicle body acceleration and dynamic suspension working space could be reduced on average by 20 per cent and 10 per cent respectively. The quarter vehicle test results have indicated that the simplest control law (using body speed signals only) gave the best performance. For the full vehicle, predicted results have shown that the optimal control law is superior to the local sky-hook damper logic because it optimized the overall vehicle performance. The gradient search method may not be able to find the numerical solution for the limited state feedback in a complex system. Instead, the relevant gain values calculated for the full state feedback law could, therefore, be used in the tuning process on the vehicle or in its computer simulation model. Compared with the quarter vehicle test results, the prediction from the non-linear simulation model of the variable damper system is on the conservative side.


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    Titel :

    Passive and semi-active airspring suspensions for rail passenger vehicles - theory and practice


    Weitere Titelangaben:

    Passive und halbaktive Luftfederungen für Eisenbahnpersonenwaggons - Theorie und Experiment


    Beteiligte:
    Tang, J.S. (Autor:in)


    Erscheinungsdatum :

    1996


    Format / Umfang :

    15 Seiten, 20 Bilder, 3 Tabellen, 13 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch







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