Optimum vibration control of CFRP sandwich beam using electro-rheological fluids and piezoceramic actuators

Abstract

In the present study, the vibration control of a hybrid smart composite beam actuated by both electro-rheological fluids (ERFs) and piezoceramic actuators is investigated. A carbon fiber reinforced plastics beam, including interleaved ERF and bonded piezoceramics, is prepared and tested under sinusoidal external excitations. Four kinds of feedback control strategies for both ERF and piezoceramic actuators are adopted in order to suppress the deflection at the free end of the cantilevered composite beam. The optimum combination of these control strategies for two types of actuators is discussed when the two actuators operate simultaneously.

Dynamic characteristics and control of magnetorheological/electrorheological sandwich structures: A state-of-the-art review

“…Choi et al (1996) involved the actuator characteristics into governing equations of motion of a cantilever sandwich beam containing ER fluid to design an active controller. Fukuda et al (2000) employed ER fluid core layer and piezoceramic actuator to realize an active controller and suppress Figure 23. Tip deflection responses of the fully treated MR sandwich beam with and without the LQR control and subject to a unit load impulse: (a) time-history: without control and (b) time-history: with observer-based control (Rajamohan et al, 2011). deflection at the free end of the cantilever composite beam.…”

“…Semi-active controllers have been applied to the MR/ER sandwich structures through various control strategies such as ON–OFF control law (Liao et al, 2012; Sapiński and Snamina, 2008), linear quadratic regulator (LQR) (Rajamohan et al, 2011), sliding mode (Allahverdizadeh et al, 2013c; Hasheminejad et al, 2013; Kim et al, 1992), and real-time control (Zhang and Li, 2009). The performance of the controllers was demonstrated by suppressing external disturbances such as sinusoidal signal (Choi et al, 1996; Fukuda et al, 2000; Liao et al, 2012), random signal (Allahverdizadeh et al, 2013c; Choi et al, 1996; Han et al, 1994; Liao et al, 2012), impulse (Allahverdizadeh et al, 2013c; Liao et al, 2012; Rajamohan et al, 2011), and white noise (Rajamohan et al, 2011). Furthermore, some studies investigated the effects of semi-active controllers on free vibration of sandwich structures (Cho et al, 2005; Rajamohan et al, 2011).…”

“…Choi et al (1996) involved the actuator characteristics into governing equations of motion of a cantilever sandwich beam containing ER fluid to design an active controller. Fukuda et al (2000) employed ER fluid core layer and piezoceramic actuator to realize an active controller and suppress deflection at the free end of the cantilever composite beam. Four types of feedback control strategies including deflection feedback control (DFC) and velocity feedback control (VFC) through or not through a relay element for both of the ER fluid and piezoceramic actuator were considered.…”

Supersonic flutter suppression of electrorheological fluid-based adaptive panels resting on elastic foundations using sliding mode control

“…Shaw [26] employed a hybrid controller, consisting of a semi-active controller based on a fuzzy-like control strategy for varying the stiffness and damping characteristics of the structure along with an active controller which uses a plant disturbance canceler for disturbance canceling, to conduct experimental studies on vibration suppression of a cantilevered ER sandwich beam subjected to periodic disturbances. Fukuda et al [27] investigated the feedback control of vibrations of a hybrid smart composite beam fabricated from carbon fiber reinforced plastics and actuated by ERFs and piezoceramic actuators. Kang et al [28] used a finite element method based on a viscoelastic model to investigate the passive and active damping characteristics of symmetric, multilayer laminated beams with double ER fluid layers for various fiber orientations and various electric fields, aiming at maximization of the damping capacity.…”

Resonant controllers for smart structures

“…The advancement in materials technology has enabled multi-layered structures where actuators, sensors and the main structure form one whole component [1]. These composite structures are called intelligent or smart structures.…”