Automobile sub-limit performance maneuvers and measures were developed for investigating the influence of vehicles-in-use steering, suspension, and brake system degradation and tire factors on vehicle handling. The maneuvers and performance measures are directed at vehicle static and dynamic stability characteristics, vehicle controllability, driver workload, and vehicle path stability under unbalanced force or moment disturbance inputs. The NHTSA automobile simulation was modified to incorporate various steering and suspension degradations and was employed to guide selection of maneuver and component degradation levels for full-scale vehicle testing. Over 1800 full-scale test runs were made with three passenger automobiles in assessing maneuver procedures and component degradation influences. Tests run with the Variable Steering Servo automobile are the first known direct measurements of steering, suspension, and tire degradation influences on vehicle open-loop dynamic characteristics and on driver/vehicle closed-loop interactions.


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    Title :

    Development of Vehicles-In-Use Sub-Limit Maneuvers. Volume II. Technical Report


    Contributors:

    Publication date :

    1977


    Size :

    172 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






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