scholarly journals Reduction of the Radiating Sound of a Submerged Finite Cylindrical Shell Structure by Active Vibration Control

Sensors ◽  
2013 ◽  
Vol 13 (2) ◽  
pp. 2131-2147 ◽  
Author(s):  
Heung Kim ◽  
Jung Sohn ◽  
Juncheol Jeon ◽  
Seung-Bok Choi
Keyword(s):  
Cylindrical Shell ◽  
Vibration Control ◽  
Shell Structure ◽  
Active Vibration Control ◽  
Active Vibration ◽  
Finite Cylindrical Shell

Optimal Placement of MFC Actuators for Vibration Control of Cylindrical Shell Structure

2008 ◽  
Vol 56 ◽  
pp. 253-258 ◽  
Author(s):  
Jung Woo Sohn ◽  
Seung Bok Choi
Keyword(s):  
Cylindrical Shell ◽  
Vibration Control ◽  
Shell Structure ◽  
Fiber Composite ◽  
Active Vibration Control ◽  
Smart Structure ◽  
Optimal Placement ◽  
Structural Vibration ◽  
Effective Control ◽  
Lagrange’S Equation

In the present paper, active vibration control of cylindrical shell structure is conducted based on optimized actuator placement. Anisotropic piezoelectric actuator named as Macro Fiber Composite (MFC) is adopted for vibration control. The governing equations of motions of the cylindrical shell structure including MFC actuators are derived from Lagrange’s equation. For the verification of the proposed analytic model, numerical results of modal analysis are compared with those of experimental test results. Optimal placements of the MFC actuators are determined with Genetic Algorithm for the effective control performance. Robust controller is then designed to suppress structural vibration of the proposed smart structure and control performances are evaluated.

Active Vibration Control of a Double-Curved Shell Structure Using the Example of Stuttgart Smartshell

2012 ◽  
Author(s):  
Martin Weickgenannt ◽  
Oliver Sawodny ◽  
Stefan Neuhaeuser ◽  
Werner Sobek
Keyword(s):  
Vibration Control ◽  
Control Strategy ◽  
Shell Structure ◽  
Active Vibration Control ◽  
Optimal Control Strategy ◽  
Present Contribution ◽  
Control Concept ◽  
Hydraulic Cylinders ◽  
Active Vibration ◽  
System States

The present contribution deals with concepts for active vibration control of a thin double-curved shell structure. The structure, Stuttgart SmartShell, is located at the University of Stuttgart. It is made of softwood and is equipped with strain gages to determine the state of static and dynamic loading. Furthermore a force input is provided at the supports of the structure using hydraulic cylinders. Here a model-based two-degree-of-freedom control concept for vibration damping is presented which is based on a dynamical model derived from Finite Element simulations. The control strategy uses modal decoupling of the system states to enable the manipulation and damping of single eigenmodes. An optimal control strategy is chosen to dampen oscillations as quickly as possible while considering limitations on the force input and peak stresses. The proposed control algorithms are applied to the shell structure under consideration and their applicability is demonstrated by simulation and experimental results.

scholarly journals Active vibration control of a conical shell using piezoelectric ceramics

2017 ◽  
Vol 36 (4) ◽  
pp. 366-375 ◽  
Author(s):  
Longfei Sun ◽  
Weijia Li ◽  
Yaozhong Wu ◽  
Qiuhua Lan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Vibration Control ◽  
Shell Structure ◽  
Conical Shell ◽  
Sliding Mode ◽  
Active Vibration Control ◽  
Sliding Mode Controller ◽  
Fuzzy Sliding Mode ◽  
Active Vibration

Conical shell structures are commonly used in many engineering systems, and vibration suppression is very important to realize the desired function. In this study, piezoelectric ceramics were used as actuators/sensors with a multimodal fuzzy sliding mode controller to suppress vibrations of conical shell structure for the first time. The structure’s natural frequencies and mode shapes were obtained through modal analysis using finite element method and verified by modal tests. The agreement between analysis and test results verified the finite element method was appropriate. A multimodal fuzzy sliding mode controller was subsequently designed based on the analysis to provide active vibration control. The resulting controller was tested experimentally for the conical shell structure. The experimental results indicated that the proposed controller can effectively use to suppress vibration for the conical shell structure.

Sign in / Sign up

Export Citation Format

Share Document