Predicting the in-vehicle noise contribution of components, such as powertrain, road, HVAC and steering system during early development, is tremendously challenging. To avoid endless design iterations, engineers need modular technologies that leverage measured individual component models into full-vehicle noise predictions. This is exactly the scope of component-based TPA. The process starts by characterizing the source loads independently, based on acquired free velocities or blocked forces. Next, using sub-structuring techniques, engineers can study the component-level NVH performance without having to physically create the full vehicle in all its variants. Such early predictions help to avoid issues and allow a more realistic design target setting.

Verify noise contributions using a time-domain transfer path analysis model. This model allows you to listen to the recorded sound of the powertrain components, tire friction, wind, and other contributors. It extends the use of TPA models to sound design and sound quality engineering. This process can also be applied to transient events such as engine restart and acceleration pedal tip-in/tip-out.

Powertrain NVH engineers will seek to trace the flow of vibro-acoustic energy from the powertrain and identify path contributions in order to analyze the variables that can have an effect on the vibro-acoustic results. TPA allows you to assess several variants and compare and evaluate results. It plays a crucial role in the optimization process of the full vehicle NVH performance.

Identify the root causes of noise and vibration issues with experimental transfer path analysis. This method provides deep insight into the system’s noise and vibration behavior. It is based on the source-transfer-receiver model and allows setting correct and precise countermeasures. In early development phases, it also helps to set realistic design targets on full system and component levels.