Implementation of swarm algorithm in modeling a flexible beam structure

Flexible multi-beam structures are significant components of large space station, architecture engineering and other structural systems. The understanding of the dynamic characteristics of these structures is essential for their design and control of vibrations. In this paper, the planar nonlinear vibrations and chaotic dynamics of an L-shape flexible beam structure will be investigated using theoretical and experimental methods. The L-shape beam structure considered here is composed of two flexible beams with right-angle. The governing equations of motion for the L-shape beam structure are established firstly. Then, the method of multiple scales is utilized to obtain a four-dimensional averaged equation. Numerical method is used to analyze the nonlinear dynamic responses and chaotic motions. Finally, The experimental apparatus and schemes for measuring the amplitude of nonlinear vibrations for the L-shape beam structure are introduced briefly. Then, the detailed analysis for experimental data and signals which represent the nonlinear responses of the beam structure are given.

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Neuro-fuzzy Identification of Flexible Beam Structure

2012 IEEE Conference on Control, Systems & Industrial Informatics ◽

10.1109/ccsii.2012.6470498 ◽

2012 ◽

Cited By ~ 1

Author(s):

Nurhanafifi Abd. Jalil ◽

Intan Z. Mat Darus ◽

Maziah Mohamad

Keyword(s):

Flexible Beam ◽

Beam Structure ◽

Fuzzy Identification ◽

Neuro Fuzzy

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Motion planning for a flexible beam structure with macro-fiber composite actuators

2009 European Control Conference (ECC) ◽

10.23919/ecc.2009.7074730 ◽

2009 ◽

Author(s):

Johannes Schrock ◽

Thomas Meurer ◽

Andreas Kugi

Keyword(s):

Motion Planning ◽

Fiber Composite ◽

Flexible Beam ◽

Beam Structure ◽

Macro Fiber Composite

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Evolutionary adaptive active vibration control

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1243/0959651971539722 ◽

1997 ◽

Vol 211 (3) ◽

pp. 183-193 ◽

Cited By ~ 11

Author(s):

M A Hossain ◽

M O Tokhi

Keyword(s):

Vibration Control ◽

Control Mechanism ◽

Vibration Suppression ◽

Active Vibration Control ◽

Adaptive Controller ◽

Recursive Least Squares ◽

Flexible Beam ◽

Beam Structure ◽

Comparative Performance ◽

Active Vibration

This paper presents an investigation into the development of an adaptive active control mechanism for vibration suppression using genetic algorithms (GAs). GAs are used to estimate the adaptive controller characteristics, where the controller is designed on the basis of optimal vibration suppression using the plant model. This is realized by minimizing the prediction error of the actual plant output and the model output. A MATLAB GA toolbox is used to identify the controller parameters. A comparative performance of the conventional recursive least-squares (RLS) scheme and the GA is presented. The active vibration control system is implemented with both the GA and the RLS schemes, and its performance assessed in the suppression of vibration along a flexible beam structure in each case.

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Hardware-in-the-loop optimization of an active vibration controller in a flexible beam structure using evolutionary algorithms

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x13502874 ◽

2013 ◽

Vol 25 (10) ◽

pp. 1211-1223 ◽

Cited By ~ 10

Author(s):

Hadi Nobahari ◽

Seyed A Hosseini Kordkheili ◽

Sajad Saraygord Afshari

Keyword(s):

Evolutionary Algorithms ◽

Flexible Beam ◽

Hardware In The Loop ◽

Beam Structure ◽

Loop Optimization ◽

Active Vibration

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Active multimodal vibration suppression of a flexible structure with piezoceramic sensor and actuator by using loop shaping

Journal of Vibration and Control ◽

10.1177/1077546310393440 ◽

2011 ◽

Vol 17 (13) ◽

pp. 1994-2006 ◽

Cited By ~ 30

Author(s):

V Sethi ◽

MA Franchek ◽

G Song

Keyword(s):

Vibration Suppression ◽

Parametric Identification ◽

Open Loop ◽

Pole Placement ◽

Flexible Beam ◽

Loop Model ◽

Linear Quadratic ◽

Beam Structure ◽

Control Effort ◽

Loop Shaping

This paper represents active multimodal vibration control of a flexible beam structure with piezoceramic (PZT) actuators and sensors using the loop shaping method. With surface-bonded PZT patch actuators and sensors, the flexible beam has both sensing and actuating capacities. Due to its flat auto spectrum in the specified frequency range, the Schroeder wave is used as an excitation signal for the non-parametric identification of the flexible beam structure. The identified open loop model is then used for the closed loop design by using the loop shaping method based on the extended sensitivity charts. A loop shaping compensator is designed to achieve multimodal vibration suppression. Numerical results showed a reduction of 8 decibels for the first mode and 12–14 decibels for the second and third modes. Experimental results closely match the simulation results. Furthermore, the results of loop shaping method are compared with those of the methods of linear quadratic regulator and pole-placement control, which are designed based on state space models via the parametric identification of the flexible beam. Comparisons show that the loop shaping method is easier to design since a parametric identification is not required and requires less control effort while maintaining the effectiveness in vibration suppression.

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