- Category Technical paper
- Related event International Congress : Automotive NVH comfort - 22 & 23 October 2014
- Edition SIA
- Date 10/22/2014
- Author F. Barillon, L. Polac, C. Thévenard - Renault
- Language English
Type PDF file (383.5 Ko)
(Downloadable immediately on receipt of online payment)
- Number of pages 9
- Code R-2014-09-23
- Fee from 8.00 € to 10.00 €
Today, fuel consumption and weight reduction issues in automotive industry leads to downsizing with the development of 3-cylinder engines. These powertrains present high level of idle vibrations due to the excitation of engine rigid body modes. Inertia properties thus need to be well known to be reintroduced into finite element analysis.
Pendulum method and modal method are well-known methods to estimate the inertia tensor of a solid, but reveals quite difficult and time consuming to be applied in situ on a complete vehicle. This paper proposes an original method to estimate the inertia properties (c.o.g. position, mass and inertia tensor) of a powertrain using operational vibrations. Both numerical and test results are presented showing the efficiency of the method.
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