Synergy Effects by using SysML Models for the Lightweight Design Method “Extended Target Weighing Approach”

摘要

Product engineering processes are multidisciplinary and comprise several methods and tools. These methods and tools often coexist and are not linked to each other. In order to come closer to a continuous coupling of models, this paper shows how SysML model data can be used for the execution of a lightweight design method called “Extended Target Weighing Approach (ETWA)”.The Extended Target Weighing Approach is a function-based lightweight design method for the systematic identification and evaluation of lightweight design potentials with regard to costs and CO2-emissions. It is based on a Function-Effort-Matrix, which quantifies the percentage contribution of each component to the fulfilment of the functions.A model, which is created according to the FAS4M approach (with SysML/MechML), contains both functions and the components involved in its design. The mass, costs and CO2-emissions of the components can be specified and, if necessary, retrieved from a CAD model via an interface. A matrix can be derived automatically from the available SysML model data, in which each component is linked to the function realized by it.This contribution shows how the Function-Effort-Matrix required for the ETWA can be automatically derived from models generated according to the FAS4M approach. This makes it possible not only to shorten the time-consuming preparatory work for the execution of the ETWA considerably with an existing SysML model but also to reduce possible sources of error, which occur during the filling of the Function-Effort-Matrix. In addition, further synergy potentials through the coupling of system modelling according to FAS4M and the ETWA like the reuse of existing SysML models or the reuse of discarded concept ideas will be demonstrated.