A process for establishing an accelerated proving ground durability schedule for a vehicle suspension system, based on real customer roads, was developed in this work. The available road load data for a specific chassis design was acquired by using a test vehicle that was equipped to measure the front and rear spindle loads, wheel-to-body displacements, and body mount loads. The test target representing the customer usage consists of a combination of 5 tracks of public roads located in Michigan, adding up to 100 miles, and is based upon a previous work by Ferris, J.B. and Larsen, J.L. [2]. It was then extrapolated to a target customer equivalent mileage of 150, 000 miles with an assigned extrapolation factor for each public road. A repeat value for each of seven test tracks at the Chelsea Proving Grounds was generated using state-of-the-art optimization techniques to match the weighted, rainflow cycle histograms from the road load data channels, . These repeat values represent how many total passes of each event would need to be combined to duplicate spindle loads and wheel-to-body displacements during 150, 000 miles of public road usage for the 95th percentile customer.


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    Title :

    Reliability-based Test Track Schedule Development for a Vehicle Suspension System


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 2007



    Publication date :

    2007-04-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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