The design of a piezostack-based active mount and application to a vibration control system

Abstract

In this work, a new active mount featuring piezostack actuators and a rubber element is proposed and applied to a vibration control system. After describing the configuration and operating principle of the proposed mount, an appropriate rubber element and appropriate piezostacks are designed and manufactured. Subsequently, the dynamic characteristics of the piezostacks and the rubber element are experimentally identified. A vibration control system with a supported mass of 50 kg is then constructed, and its governing equations of motion are derived. In order to actively attenuate the vibration transmitted from the base excitation, a robust sliding mode controller is formulated with consideration of parameter uncertainties. The controller is then experimentally realized and vibration control performances (acceleration and transmitted force) of the proposed mount are evaluated in both time and frequency domains.

A Study on the Hybrid Mount against Vibration and Shock for Naval Ships

“…The experimental results show that the two piezostack actuators have nearly the same characteristics. Nguyen et al [11] addressed the detail parameter identification. Figures 8 and 9 show the bode plots from base exciting acceleration to equipment acceleration and from piezo stack actuating control force to equipment acceleration, respectively.…”

“…Under controlled condition, a robust sliding mode control method was adapted to drive the piezostack actuators. Detail description and test results on the control algorithm are presented in a reference [11]. Several experiments with the excitation ranging from 100 Hz to 1,000 Hz were carried out to evaluate the control performance, the results of which are summarized in Table 7, where the 2 nd column is the amplitude of the transmissibility of the (SC)7E450 passive mount; the 3 rd column is the amplitude of the transmissibility of the hybrid mount with controlled, respectively.…”

An inertia-type hybrid mount combining a rubber mount and a piezostack actuator for naval shipboard equipment

“…The hybrid type, which can be activated by various types of actuators including hydraulic actuators (Turnip et al, 2009), electromagnetic actuators (Howard et al, 2000;Lee and Lee, 2009) or piezoelectric actuators (Kamada et al, 1997;Choi et al, 2004;Nguyen et al, 2009), is utilized to improve the isolation performance of the passive type. In our previous research (Moon et al, 2010;Nguyen et al, 2008), a 100 kg-class hybrid mount-combined with a rubber mount and piezostack actuators -was developed for use with various items of shipboard machinery installed on naval ships.…”

A dynamic model for a displacement amplified magnetostrictive driver for active mounts

“…However, these actuators exhibit a frequency bandwidth lower than 80 Hz. To achieve broader frequency bandwidth, actuators using smart material drivers have been considered [4][5][6].…”