SSHS LAB

Research

b. Passive and Active Shock & Vibration Control

Shock & Vibration Control

Research

Shock & Vibration Control

b. Passive and Active Shock & Vibration Control

Principal Investigator : Jae-Hung Han (SSHS), Han-Lim Choi (LiCS)
Participating Graduate Research Assistants: Jae-Won Park (SSHS), Dae-Sung Jang, Sung-Hun Kim (LiCS)

Summary:

Vibration control group in the triple S Lab develops the vibration suppression techniques for aerospace structures using smart materials such as piezoelectric materials. In order to suppress a low-frequency, low-damping vibration, we applied shunted piezoelectric materials to a cantilevered beam and a plate in a passive or a semi-active way. We analyzed the sensitivities of the damping performance for shunted piezoelectrics with different shunt circuit types.

Related Recent Publication:

[1] Park, J.-W., Han, J.-H.,, and Oh, H.-U., “Sensitivity Analysis of Shunted Piezoelectrics in Vibration Damping Performance under Temperature Variation,” International Congress on Sound and Vibration (ICSV19), Vilnius, Lithuania, Jul.10, 2012.
[2] Park, J.-W., Han, J.-H.,, and Kang, L.-H., “Vibration Control using Shunted PUMPS,” The 7th World Congress on Biomimetics, Artificial Muscles and Nano-Bio (BAMN), Jeju Island, Korea, Aug. 26-30, 2013.

Vibration Control using Shunted Piezoelectric Materials

1.Goals

Enhencement of damping performance at a resonant frequency of a structure

2. Approaches

Analytical modeling of shunted piezoelectric using electro-mechanical coupling
Experimental implementation of shunted piezoelectrics
Analytical and numerical analysis of performance sensitivity

3. Research Achievements

Performance Analysis of Shunted Piezoelectrics

Mathematical modeling of shunted pieozlectrics using piezoelectric coupling effect
Tuning of shnut circuit element for the maximum damping at a mechanical resonance

Experiment Setup for Vibration Control in Passive and Semi-active Ways

Experiment setup and implementation of shunt circuit
Construction of semi-active switching controller for shunt circuit

Experiment results using semi-active synchronized switching controller

Sensitivity Analysis of Damping Performance for Shunted Piezoelectrics

Damping performance index for RES is selected as a loss factor from an effective modulus
Damping performance indices for RSPs are selected as maximum magnitudes of a transfer functions around resonances