Vibration Control Of Smart Beam Research Articles

Active vibration control of smart beam by μ -synthesis technology: modeling via finite element method based on FSDT

This article proposes an efficient strategy for the active vibration control of smart beam that combines the Finite Element Method (FEM) and advanced robust control to suppress vibration. The piezoelectric actuator and sensor are coupled as part of the smart structure by using the 2D First-order Shear Deformation (FSDT) plate theory. The accurate modeling of the mechanical displacement field and electric potential field is achieved by approximating the sub-layered coupling of the piezoelectric potential field in the z-axis direction. In practice, most active controls of smart structures do not take into account the influence of the piezoelectric itself and the piezoelectric effect on the natural frequency of the smart structures, and they do not emphasize the internal stability and stability margin of the control system. Regarding the above questions, a modeling method of a generalized uncertain plant for the piezoelectric smart beam is proposed in this article. Fully considering the uncertainty of the system model caused by parameter perturbation and modeling error, a dynamic controller is designed with the μ-Synthesis technology. The proposed approach is numerically verified to have good robust performance on piezoelectric smart beam, which can effectively enhance the performance of smart structure control in other scenarios.

Active vibration control of smart beam under parametric variations

Vibration control is one of the prominent factors, especially in lightweight structures in space technology. These structures, due to their low mass and thinness, frequently lose the stability under environmental disturbances. Piezoelectric materials as sensors/actuators have been widely used to control vibrations and mode shapes of such structures. Nowadays, piezoelectric and passive materials like viscoelastic materials have shown combined advantage of hybrid damping (active constrained layer damping) and with different parametric variations in them have shown remarkable property for control authority. This paper presents the details of parametric variations in smart structure using energy methods to demonstrate the utility for further structure design. Finite element model has been implemented using MATLAB software to analyze its effect of various parameters. Different environmental temperatures as thermal loads have been considered, and their effect on damping ratio is investigated. Parameters like percentage coverage of viscoelastic, piezoelectric material patches and the shape of patches on damping characteristics have been demonstrated.

Simulation and experimental analysis of active vibration control of smart beams under harmonic excitation

In the present study, active control of a smart beam under forced vibration is analyzed. The aluminum smart beam is composed of two piezoelectric patches and strain gauge. One of the piezoelectric patches is used as controlling actuator while the other piezoelectric patch is used as vibration generating shaker. The smart beam is harmonically excited by the piezoelectric shaker at its fundamental frequency. The strain gauge is utilized to sense the vibration level. Active vibration reduction under harmonic excitation is achieved using both strain and displacement feedback control. Control actions, the finite element (FE) modeling and analyses are directly carried out by using ANSYS parametric design language (APDL). Experimental applications are performed with LabVIEW. Dynamic behavior at the tip of the beam is evaluated for the uncontrolled and controlled responses. The simulation and experimental results are compared. Good agreement is observed between simulation and experimental results under harmonic excitation.

Effects of piezoelectric sensor/actuator debonding on vibration control of smart beams

Abstract In vibration control of smart structures, piezoelectric sensors/actuators are usually bonded to the surface of a host structure. Debonding may occur between the piezoelectric sensors/actuators and the host structure, and it may decrease the control efficiency of vibration suppression or even lead to an unstable closed loop control system. This paper investigates the effect of the debonding on vibration control of beams with piezoelectric sensors and actuators. Presented is a novel model, which takes into account both flexural and longitudinal displacements of the host beam and piezoelectric layers as well as the peel and shear strains of the adhesive layer. Both collocated and non-collocated control schemes are used to study the effects of sensor or actuator debonding on active vibration control of smart beams.

Distributed piezoelectric segment method for vibration control of smart beams

Distributed piezoelectric segment method for vibration control of smart beams