A rigid body model to represent a side impact crash is constructed using five degrees-of-freedom (dof) for the vehicle and three dof for each occupant in the vehicle. Nonlinear stiffness and damping elements and the presence of physical gaps between several components make the model highly nonlinear. The model is validated using experimental crash test data from a National Highway Traffic Safety Administration (NHTSA) database. To simplify the parameter identification process and reduce the number of parameters to be identified at each stage, a two-step process is adopted in which the vehicle is first assumed to be unaffected by the presence of the occupants, and its model parameters are identified. Subsequently, the parameters in the occupant models are identified.

    The active set method with a performance index that includes both the L2 and L norms is used for parameter identification. A challenge is posed by the fact that the optimisation problem involved is non-convex. To overcome this challenge, a large set of random initial values of parameter estimates is generated and the optimisation method is applied with all these initial conditions. The values of parameters that provide the minimal performance index from the entire set of initial conditions are then chosen as the best parameter values. The optimal parameters values thus identified are shown to significantly improve the match between the model responses and the experimentally measured sensor signals from the NHTSA crash test.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Dynamic model for automotive side impact crashes


    Contributors:

    Published in:

    Vehicle System Dynamics ; 52 , 7 ; 875-890


    Publication date :

    2014-07-03


    Size :

    16 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Dynamic model for automotive side impact crashes

    Sun, Ludong | Online Contents | 2014


    Dynamic model for automotive side impact crashes

    Sun, Ludong / Taghvaeeyan, Saber / Rajamani, Rajesh | Tema Archive | 2014


    Dynamic model for automotive side impact crashes

    Sun,L. / Taghvaeeyan,S. / Rajamani,R. et al. | Automotive engineering | 2014


    Vehicle Far-Side Impact Crashes

    Stolinski, R. / Grzebieta, R. / Fildes, B. et al. | British Library Conference Proceedings | 1998


    Intrusion in Side Impact Crashes

    Patel, Deena / Ross, Marc | SAE Technical Papers | 2007