This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Utilizing Engine Dyno Data to Build NVH Simulation Models for Early Rapid Prototyping
Technical Paper
2021-01-1069
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
As the move to decrease physical prototyping increases the need to virtually prototype vehicles become more critical. Assessing NVH vehicle targets and making critical component level decisions is becoming a larger part of the NVH engineer’s job. To make decisions earlier in the process when prototypes are not available companies need to leverage more both their historical and simulation results. Today this is possible by utilizing a hybrid modelling approach in an NVH Simulator using measured on road, CAE, and test bench data.
By starting with measured on road data from a previous generation or comparable vehicle, engineers can build virtual prototypes by using a hybrid modeling approach incorporating CAE and/or test bench data to create the desired NVH characteristics. This enables the creation of a virtual drivable model to assess subjectively the vehicles acoustic targets virtually before a prototype vehicle is available. This approach can also be used with, but not limited to, (pre)prototype powertrain, exhaust, and intake systems.
To create drivable NVH models for target setting, operating source level and path sensitivities are required. While these measurements can typically be a limiting factor without a prototype vehicle the hybrid model approach allows for flexibility. This flexibility comes from the fact that any combination of on road data, CAE, or test bench data can be utilized to build the model. This flexibility allows for models to be built earlier than by using a traditional model that would require measured on road data of a prototype vehicle.
Once a model is assembled it is possible to assess "what if" scenarios to determine targets or to do A-To-B comparisons of different sub-systems or components. This can be completed by applying filters to already assembled contributions or substituting CAE or test bench data for new parts. This paper will share an example of how using an NVH simulator allows for a powertrain subsystem to be substituted into a different vehicle virtually and made it possible to drive and assess subjectively to identify NVH concerns at an early stage. This was done by creating a source/path/contribution model and including where needed simulation data from CAE.
Recommended Content
Authors
Topic
Citation
Thom, B., Singh, V., Newton, G., Rengarajan, R. et al., "Utilizing Engine Dyno Data to Build NVH Simulation Models for Early Rapid Prototyping," SAE Technical Paper 2021-01-1069, 2021, https://doi.org/10.4271/2021-01-1069.Also In
References
- Bogema , D. The Benefits of Experiencing NVH and CAE Data from Preconcept to Production SIA Automotive NVC Comfort Conference Le Mans 2016
- Bogema , D. Auralization of Vehicle Sound in Development and Production SAE Technical Paper 2014-36-0804 2014 https://doi.org/10.4271/2014-36-0804
- Cundy , C. , Stickler , M. , and Luken , R. Utilizing a Source-Path-Contribution Approach with a Desktop NVH Simulator to Improve Powertrain NVH Development Efficiency Proceedings of Automotive Acoustics Conference 2019 10.1007/978-3-658-27669-0_12
- Lim , C. , Han , E. , Apelian , C. , and Bogema , D. A Study on North American Customer Preference to Interior Noise using Sound Balance Analysis SAE Int. J. Passeng. Cars - Mech. Syst. 7 1 2014 32 40
- Freeman , T. and Cerrato , G. Source-Path-Contribution Methodologies across a Wide Range of Product Types SAE Int. J. Passeng. Cars - Mech. Syst. 8 2 2015 10.4271/2015-01-2360