Browse Publications Technical Papers 980373
1998-02-23

Automatic Optimization of Pre-Impact Parameters Using Post Impact Trajectories and Rest Positions 980373

When vehicle to vehicle collisions are analyzed using a discrete kinetic time forward simulation, several simulation runs have to be performed, to find a solution, where post impact trajectories and rest positions correspond with the real accident. This paper describes in detail a method to vary the pre-impact parameters automatically and to evaluate the simulation results.
In a first step the different pre-impact parameters are discussed. Their influence on the impact and the post impact movement is shown. Furthermore the necessary specifications to define the post crash movement are presented. The necessity to define tire marks and rest positions of the vehicles involved is outlined. An effective evaluation criteria is derived, which is used to calculate a simulation error. This error is then used as a target function to control the optimization process.
Two different optimization strategies are presented. Their performance is discussed in relation to the numerical stability, progress rate and accuracy.
The optimization method can, in principle, be used together with any discrete kinetic time forward simulation model also in connection with various collision models. For the current paper the simulation models of PC-Crash [1], [2], [3] were used.
In the last part of the paper several sample cases from crash tests and real life accidents are presented together with the result of the automatic optimization process.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
JOURNAL ARTICLE

Optimization Strategies to Explore Multiple Optimal Solutions and Its Application to Restraint System Design

2012-01-0578

View Details

TECHNICAL PAPER

Dynamic Suspension Simulation

2003-01-3648

View Details

TECHNICAL PAPER

Modeling and Measurement of Payload Mass of the Wheel Loader in the Dynamic State based on Experimental Parameter Identification

2016-01-0469

View Details

X