It is shown that time-dependent periodic control can improve the fuel economy of vehicles in cruise. The time-dependent controls considered are relaxed steady-state (RSS) control, quasi-steady-state (QSS) control, and quasi-relaxed steady-state (QRSS) control. Examples are given which show that QRSS control may give better performance than either RSS or QSS control. Properties of optimal cost functions (dependent on the minimum required average speed) are derived. The possibility or impossibility of improved performance through the use of QRSS, QSS, and RSS control is investigated in terms of assumptions on the vehicle drag and fuel-consumption functions.


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    Title :

    Periodic Control of Vehicle Cruise: Improved Fuel Economy by High and Low Frequency Switching


    Contributors:

    Publication date :

    1975


    Size :

    11 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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