This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Experimental Determination of an Engine's Inertial Properties
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 15, 2007 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Determination of an engine's inertial properties is critical during vehicle dynamic analysis and the early stages of engine mounting system design. Traditionally, the inertia tensor can be determined by torsional pendulum method with a reasonable precision, while the center of gravity can be determined by placing it in a stable position on three scales with less accuracy. Other common experimental approaches include the use of frequency response functions. The difficulty of this method is to align the directions of the transducers mounted on various positions on the engine. In this paper, an experimental method to estimate an engine's inertia tensor and center of gravity is presented. The method utilizes the traditional torsional pendulum method, but with additional measurement data. With this method, the inertia tensor and center of gravity are estimated in a least squares sense. To validate this method, a uniform rectangular box was used as a test sample, of which the inertial properties are known. The experimental results have a difference of less than 2% compared with the theoretical results. A through discussion and test procedure is presented.
|Aerospace Standard||Direction Instrument, Non-Magnetic, Stabilized Type (Directional Gyro)|
|Ground Vehicle Standard||Personnel Protection - Compact Tool Carriers|
|Technical Paper||Developing Robust Vibration Excitation and Control Methods for Evaluating Rattle Noise in Automotive Components|
CitationLiu, C. and Orzechowski, J., "Experimental Determination of an Engine's Inertial Properties," SAE Technical Paper 2007-01-2291, 2007, https://doi.org/10.4271/2007-01-2291.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
- Harris, C. M. and Crede, C. E. edited, “Shock and Vibration Handbook”, McGraw-Hill, New York, 1961, Vol.1, Chapter 3, pp. 12-15.
- Mangus, J. A., Passerello,C., Van Karsen, C. Direct Estimation of Rigid Body Properties from Frequency Response Functions, Proceedings of the 10th International Modal Analysis Conference, 1992.
- Mangus, J. A., Passerello, C., Van Karsen, C., Estimating Rigid Body Properties from Reaction Measurements, Proceedings of the 11th International Modal Analysis Conference, 1993.
- Toivola, J., Nuutila, O., Comparison of Three Methods for Determining Rigid Body Inertia Properties from Frequency Response Functions, Proceedings of the 11th International Modal Analysis Conference, 1993.
- Urgueira, A. P., On the Rigid Body properties Estimation from Modal testing, Proceedings of the 13th International Modal Analysis Conference, 1995.
- Huston R. L. and Liu C. Q., “Formulas for Dynamic Analysis”, Marcel Dekker, Inc, 2001.