Transactions of the JSME (in Japanese)
Online ISSN : 2187-9761
ISSN-L : 2187-9761
Dynamics & Control, Robotics & Mechatronics
A method for suppressing resonance response of a vibration system coupled by springs
Masashi KOMADAYuichi MATSUMURAIchiro KIDOEiji NAKATSUGAWA
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2019 Volume 85 Issue 879 Pages 19-00171

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Abstract

Since interior noise of an electric vehicle driven by motor has no engine noise, the contribution of the road induced noise at the low-middle vehicle speed range is higher and the noise is more noticeable for passengers compared to a conventional internal combustion engine vehicle. For this background, to reduce the road induced noise, this paper proposes a new method for suppressing the resonance response of the two vibration systems coupled by springs, which simulate a car body assuming the use of semi-active stiffness control. When the compliance matrix at coupling degrees of freedom is decomposed into eigenvalues and eigenvectors, it is known that resonance responses of a whole structure depend on the product of the eigenvector corresponding to zero eigenvalue and the compliance matrices of subsystems. Therefore, we proposed a method to suppress resonance response by setting the product to a zero vector. Firstly, an eigenvector is specified to achieve the zero vector. Then, to realize the specified eigenvector, the coupling stiffness between two subsystems, which is used in semi-active control, is changed. Finally, we apply this method to a beam structure and verify its effectiveness.

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© 2019 The Japan Society of Mechanical Engineers
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