Impact force identification by using modal transformation method for automobile test Rig.

Rahman, A.G.A., Yee, K., Ismail, Z., Tong, C.W. and Noroozi, S., 2014. Impact force identification by using modal transformation method for automobile test Rig. Applied Mechanics and Materials, 471, 102 - 106.

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DOI: 10.4028/www.scientific.net/AMM.471.102

Abstract

In the automobile industry, impact force is the main cause for material fatigue in lightweight vehicles. Bump-excited impact force is the most common case, which causes damage to vehicles and reduces the quality of the ride. Force identification is important to reflect the structure's health so that action such as structure modification can be taken before material fatigue. However, direct measurement by using force transducer is not practical due to difficulty in force sensor configuration. A methodology utilizing Operating Deflection Shape (ODS) analysis, Frequency Response Function (FRF) measurement and Modal Transformation Method (MTM) to evaluate the dynamic force is proposed here. This method is called indirect force measurement by using inverse technique. The performance of this approach was demonstrated via experiment. From the measured responses and measured dynamic characteristics of an automobile test rig, a real time mathematical manipulation can generate the system's input force. The force location is known in priori for impact excitation and therefore the inverse problem is well-posed. This method was tested using different force location with unique input force. It shows that high quality of curve fitting to extract the modal parameters such as damped natural frequency, modal damping and residue mode shape is essential to obtain a high accuracy force determination © (2014) Trans Tech Publications, Switzerland.

Item Type:Article
ISSN:1662-7482
Uncontrolled Keywords:Correlation; Frequency Response Function; Impact Force Identification; Lightweight Structure; Modal Transformation Method; Operating Deflection Shape
Subjects:UNSPECIFIED
Group:Faculty of Science & Technology
ID Code:24957
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:14 Nov 2016 16:09
Last Modified:05 Dec 2016 16:39

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