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Mathematical Problems in Engineering - Volume 2015 2015, Article ID 175257, 11 pages -

Research ArticleSchool of Automotive Engineering, Shandong Jiaotong University, Jinan 250023, China

Received 14 July 2015; Accepted 10 September 2015

Academic Editor: Anders Eriksson

Copyright © 2015 Chuanyan Xu and Fengping Cao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The interpolation method of discrete spectrum is applied to the engine excitation force identification. The frequency, amplitude, and phase of the vibration response of each measuring point on cylinder surface are obtained accurately based on the interpolation method. Combination with the inertia parameters and the dynamic properties of the mounts, the excitation force, and moment at the center of gravity of engine can be exactly retrieved. The nonlinear problem caused by the imprecise phase of the measurement points is avoided, and the identified method is simplified. Simulation results confirm the importance of the interpolation method on the accurate identification of the excitation force. Influences on the excitation force identification are analyzed quantitatively. The reasons causing the errors are analyzed and the avoidance methods are given too. Through the multi-rigid-body dynamics model simulation, the excitation force identification method is confirmed. Then, the proposed method is carried out on an engine.

Autor: Chuanyan Xu and Fengping Cao

Fuente: https://www.hindawi.com/


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