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Roll- and pitch-plane coupled hydro-pneumatic suspension. Part I Feasibility analysis and suspension properties

Cao, Dongpu and Rakheja, Subhash and Su, Chun-Yi (2010) Roll- and pitch-plane coupled hydro-pneumatic suspension. Part I Feasibility analysis and suspension properties. Vehicle system dynamics, 48 (3). pp. 361-386. ISSN 0042-3114

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    Abstract

    Passive fluidically coupled suspensions have been considered to offer a promising alternative solution to the challenging design of a vehicle suspension system. A theoretical foundation, however, has not been established for fluidically coupled suspension to facilitate its broad applications to various vehicles. The first part of this study investigates the fundamental issues related to feasibility and properties of the passive, full-vehicle interconnected, hydro-pneumatic suspension configurations using both analytical and simulation techniques. Layouts of various interconnected suspension configurations are illustrated based on two novel hydro-pneumatic suspension strut designs, both of which provide a compact design with a considerably large effective working area. A simplified measure, vehicle property index, is proposed to permit a preliminary evaluation of different interconnected suspension configurations using qualitative scaling of the bounce-, roll-, pitch- and warp-mode stiffness properties. Analytical formulations for the properties of unconnected and three selected X-coupled suspension configurations are derived, and simulation results are obtained to illustrate their relative stiffness and damping properties in the bounce, roll, pitch and warp modes. The superior design flexibility feature of the interconnected hydro-pneumatic suspension is also discussed through sensitivity analysis of a design parameter, namely the annular piston area of the strut. The results demonstrate that a full-vehicle interconnected hydro-pneumatic suspension could provide enhanced roll- and pitch-mode stiffness and damping, while retaining the soft bounce- and warp-mode properties. Such an interconnected suspension thus offers considerable potential in realising enhanced decoupling among the different suspension modes.

    Item Type: Article
    Journal or Publication Title: Vehicle system dynamics
    Additional Information: The final, definitive version of this article has been published in the Journal, Vehicle System Dynamics, 48 (3), 2010, © Informa Plc
    Uncontrolled Keywords: vehicle dynamics ; interconnected suspension ; hydro-pneumatic coupling ; feasibility analysis ; suspension property ; tuning flexibility ; VEHICLES
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Departments: Faculty of Science and Technology > Engineering
    ID Code: 50047
    Deposited By: ep_importer_pure
    Deposited On: 29 Sep 2011 14:38
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Jan 2014 05:21
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/50047

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