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Bidirectional active vibration control of two-dimensional structure inspired by automotive engine mounting system

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Abstract

Recently, active mounting systems have been applied to automotive engine mounts to effectively mitigate structure-borne vibrations throughout the vehicle chassis. Active mounting systems have been investigated extensively to alleviate the vibration and noise of automobiles; however, the actual engine mounting orientation is not considered, and only an extremely small range of specific vibration and noise control is examined. This paper presents the modeling, analysis, and control of a source structure with an active mounting system while considering the location and direction of actual automotive engine mounts. Two active mounts comprising a piezoelectric stack actuator arranged in series with an elastomeric mount are applied to mitigate both vertical and horizontal vibrations by setting a variable parameter via the dynamic relation of the source structure. When harmonic excitation forces are employed, the secondary force required by each active mount can be calculated mathematically, and a control signal is applied to reduce vibrations through destructive interference with the input signal. Simulation results show that the excitation vibration can be reduced using this bidirectional active mount. Hence, noise vibration harshness is expected to be improved by controlling the vibration of the actual automotive engine structure and the secondary force of actuators.

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Abbreviations

m :

Mass

I :

Inertia

l :

Distance

k :

Stiffness

ε :

Displacement

ξ :

Displacement at each actuator part

θ :

Rotational displacement

w :

Shaker force

f :

Actuator force

μ :

Step size (mu)

a :

Output signal at each actuator path

M :

Mass matrix

C :

Damping matrix

K :

Stiffness matrix

W :

Shaker force vector

F :

Actuator force vector

q :

Displacement vector

c :

Damping coefficient

φ :

Phase

ω :

Frequency

C :

Dynamic stiffness matrix

H :

Compliance matrix

θ :

Amplitude

β :

Phase

1 :

Upper structure (source)

2 :

Lower structure (receiver)

aci :

Actuator

sti :

Stack actuator

f :

Flank

x :

X-direction

y :

Y-direction

z :

Z-direction

gi :

Actuator position

:

Complex number

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Acknowledgments

This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2022R1 F1A1076089) and also supported by the 2022 Yeungnam University Research Grant (222A380002).

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Correspondence to Byeongil Kim.

Additional information

Dongwoo Hong received his Ph.D. from the Department of Mechanical Engineering at the Yeungnam University, Republic of Korea. He is currently a Senior Researcher at the Daegu Mechatronics & Materials Institute. His research interests are smart structures, vibration control, and deep learning, especially in automotive NVH applications.

Hojoon Moon received his M.S. from the Department of Mechanical Engineering at the Yeungnam University, Republic of Korea. He is currently a full-time researcher at the Research Institute of Mechanical Technology at the Yeungnam University. His research interests are smart structures and vibration control for automotive mounting systems.

Byeongil Kim received his Ph.D. from the Department of Mechanical Engineering at the Ohio State University, USA. He is currently an Associate Professor at Yeungnam University, Republic of Korea. His research interests are active noise and vibration control, adaptive structures and NVH control based on deep learning in automotive, aerospace, and industrial applications.

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Hong, D., Moon, H. & Kim, B. Bidirectional active vibration control of two-dimensional structure inspired by automotive engine mounting system. J Mech Sci Technol 38, 2231–2246 (2024). https://doi.org/10.1007/s12206-024-0406-4

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  • DOI: https://doi.org/10.1007/s12206-024-0406-4

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