This paper describes the virtual development process of automotive audio systems in a multidisciplinary simulation environment. First a multiphysical framework and process flow for digital prototyping of loudspeakers, packaging and the in-situ situation in the car cabin is presented. Furthermore, the virtual audio system, solely described by computer models, is virtually tuned and auralized long before a single piece of hardware exists. During the tuning and auralization process the framework is extended towards a multidisciplinary approach as digital signal processing methodologies, psychoacoustical effects, binaural audio technologies and subjective evaluation concepts (listening tests) are taken into account as well. This multidisciplinary digital model of an automotive audio system is achieved by extensive use of matrix methods, especially finite and boundary element methods and finite difference schemes, as well as geometrical acoustics (e.g. ray/cone tracing). First we will give a short overview about the theory of the numerical methods used for such predictive engineering tasks, while subsequently the multiphysical model is extended to a multidisciplinary model. Based on some typical examples out of our daily business we will describe the modeling of loudspeakers, the packaging situation (i.e. built-in situation of the loudspeaker in the car, interaction with enclosures) and a full system model simulating the radiation of loudspeakers into the car cabin. Finally we will present how the human factor (i.e. how audio events are perceived by humans with respect to spectral and spatial effects) is added in the tuning process and how we ultimately auralize such an audio system by means of a binaural playback system. Additionally we will make some remarks on the business benefits of these methods and we will also address uncertainties in our simulation models which are inherent to every modeling approach.
Multidisciplinary simulations for virtual product development of automotive audio systems
2010
9 Seiten, 14 Bilder, 7 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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