Experimental Study on Identification Inertia Parameters of the cab Based on the Mass Line Method

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (16) : 193-197.

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Experimental Study on Identification Inertia Parameters of the cab Based on the Mass Line Method

Yunkai Gao, Haixing Feng, Jianguang Fang, Dawei Zhong

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Abstract

Accurate inertia parameters of the heavy truck cab, including the mass, the position of mass center, the moment of inertia and the product of inertia, and so on are basic parameters of the whole vehicle dynamic analysis. A domestic heavy truck cab has been studied. The Frequency Response Functions (FRFs) are obtained by LMS data acquisition system. The center of mass in the XY plane of the cab is obtained by the weighing method. And the center of mass of the cab is calculated based on the mass line which is extracted from the FRFs. The center of mass in the XY plane extracted from experiment data and that measured by weighing method are compared. The result of the comparison is that the error in X direction is 1.99cm and the error in Y direction is 0.68cm. This result indicates that the mass line method has good measurement precision. Then the moment of inertia, product of inertia, principal moment of inertia and principal axis direction are obtained. Finally, the reasons of the error have been analyzed and discussed.

Key words

Heavy truck cab / Mass line method / Moment of inertia / Frequency Response Functions

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Yunkai Gao;Haixing Feng;Jianguang Fang;Dawei Zhong. Experimental Study on Identification Inertia Parameters of the cab Based on the Mass Line Method[J]. Journal of Vibration and Shock, 2013, 32(16): 193-197