F2008-07-005
Functional Target Value Deduction Using Approximate Models in Conceptual Design Considering Model Accuracy
In the early conceptual phase of a car its major properties have to be set. In the majority of cases basic properties already exist, such as size, cost range, weight (CO_2 production and acceleration behaviour). However other properties such as passenger safety and therefore crash performance, stiffness, handling and vibration behaviour have to be defined. Obviously the future vehicle should be as good as possible, but these values will be restrained to the basic properties and are therefore limited, due to the technical possibilities available. In order to define achievable and optimal targets for the car body development the criteria size of the car, weight and cost limit have to be considered and combined with the technical possibilities as well as the engineering know how.
The current paper demonstrates a method to derive reasonable and optimal balanced functional targets for car bodies based on approximate models representative for the early design phase. It will be shown how the coarse model accuracy is considered to leave a working range for the addressed values.
This abstract is supplemented by a PDF, which can be viewed here.
Session: Vehicle Development