Continuous ant colony optimisation for active vibration control of flexible beam structures

2011 ◽  
Author(s):  
Maziah Mohamad ◽  
M. O. Tokhi ◽  
M. Omar
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Ant Colony ◽  
Flexible Beam ◽  
Ant Colony Optimisation ◽  
Beam Structures ◽  
Active Vibration

scholarly journals Self-Tuning Active Vibration Control in Flexible Beam Structures

1994 ◽  
Vol 208 (4) ◽  
pp. 263-278 ◽  
Author(s):  
M O Tokhi ◽  
M A Hossain
Keyword(s):  
Vibration Control ◽  
Vibration Suppression ◽  
Finite Difference Methods ◽  
Active Vibration Control ◽  
Digital Signal ◽  
Flexible Beam ◽  
Beam Structures ◽  
Single Input Single Output ◽  
Active Vibration ◽  
Single Input

This paper presents the design and performance evaluation of an adaptive active control mechanism for vibration suppression inflexible beam structures. A cantilever beam system in transverse vibration is considered. First-order central finite difference methods are used to study the behaviour of the beam and develop a suitable test and verification platform. An active vibration control algorithm is developed within an adaptive control framework for broadband cancellation of vibration along the beam using a single-input multi-output (SIMO) control structure. The algorithm is implemented on a digital processor incorporating a digital signal processing (DSP) and transputer system. Simulation results verifying the performance of the algorithm in the suppression of vibration along the beam, using single-input single-output and SIMO control structures, are presented and discussed.

Comparison of Active and Hybrid Vibration Confinement With Conventional Active Vibration Control

1999 ◽  
Author(s):  
Lawrence R. Corr ◽  
William W. Clark
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Numerical Study ◽  
Active Vibration Control ◽  
Piezoelectric Actuators ◽  
Control Technique ◽  
Flexible Beam ◽  
Velocity Feedback ◽  
Active Vibration ◽  
Piezoelectric Actuators And Sensors

Abstract This paper presents a numerical study in which active and hybrid vibration confinement is compared with a conventional active vibration control method. Vibration confinement is a vibration control technique that is based on reshaping structural modes to produce “quiet areas” in a structure as opposed to adding damping as in conventional active or passive methods. In this paper, active and hybrid confinement is achieved in a flexible beam with two pairs of piezoelectric actuators and sensors and with two vibration absorbers. For comparison purposes, active damping is achieved also with two pairs of piezoelectric actuators and sensors using direct velocity feedback. The results show that both approaches are effective in controlling vibrations in the targeted area of the beam, with direct velocity feedback being slightly more cost effective in terms of required power. When combined with passive confinement, however, each method is improved with a significant reduction in required power.

Study on Vibration Control of a Flexible Cantilever Beam Based on Fuzzy PID

2013 ◽  
Vol 421 ◽  
pp. 579-584 ◽  
Author(s):  
Xian Jun Sheng ◽  
Sheng Zhong ◽  
Ke Xin Wang ◽  
Tao Jiang
Keyword(s):  
Vibration Control ◽  
External Disturbance ◽  
Active Vibration Control ◽  
Flexible Beam ◽  
Fuzzy Pid ◽  
Aerospace Vehicles ◽  
External Interference ◽  
Aircraft Wings ◽  
Vibration Effect ◽  
Active Vibration

The overall performance of large aerospace vehicles is determined to a great extent by the wings structure of aircrafts. In order to prevent wings vibration due to external interference, schemes of combined fuzzy-PID and fuzzy adapt PID controllers are proposed based on flexible beam structure. The MATLAB simulation model demonstrates that the proposed controllers not only has good dynamic characteristics, but also reduce the vibration effect greatly caused by external disturbance, which lay the foundation for the active vibration control of aircraft wings.

ANFIS Active Vibration Control of Flexible Beam Structures

Volume 1 ◽  
2004 ◽  
Author(s):  
S. Z. Mohd. Hashim ◽  
M. O. Tokhi
Keyword(s):  
Vibration Control ◽  
Fuzzy Inference System ◽  
Dynamic Range ◽  
Vibration Suppression ◽  
Fuzzy Inference ◽  
Least Squares Method ◽  
Active Vibration Control ◽  
Flexible Beam ◽  
Beam Structures ◽  
Inference System

This paper presents the development of an adaptive neuro-fuzzy inference system (ANFIS) controller for vibration control of flexible beam structures. ANFIS constructs a fuzzy inference system (FIS) whose membership function parameters are tuned (adjusted) using the backpropagation algorithm and least squares method. This allows the fuzzy system to learn from the data modeling. To allow the non-linear dynamics of the system be incorporated within the design, a pseudo random binary signal (PRBS) covering the dynamic range of interest of the system is used to train the ANFIS model, which gives good output prediction. Simulation results showing the performance of the developed control scheme in vibration suppression of flexible beam structures, with changes in the excitation signal, are presented and discussed.

Vibration Control of a Beam Using the Nearly Optimal Control Algorithm with a Disturbance Force Observer

2001 ◽  
Vol 17 (4) ◽  
pp. 173-177
Author(s):  
Der-An Wang ◽  
Yii-Mai Huang
Keyword(s):  
Optimal Control ◽  
Feedback Control ◽  
Vibration Control ◽  
Feedforward Control ◽  
Active Vibration Control ◽  
Asymptotic Properties ◽  
Control Law ◽  
Flexible Beam ◽  
Active Vibration ◽  
Modal Space

ABSTRACTActive vibration control of a flexible beam subjected to arbitrary, unmeasurable disturbance forces is investigated in this paper. The concept of independent modal space control is adopted. Both the feedforward and feedback control is implemented here to reduce the beam vibration. Because of the existence of the disturbance forces, the feedforward control is applied by employing the idea of force cancellation. A modal space disturbance force observer is then established in this paper to observe the disturbance modal forces for the feedforward control. For obtaining the feedforward and feedback control gains with the optimal sense, the nearly optimal control law is derived, where the modal disturbance forces are regarded as additional states. The vibration control performances and the asymptotic properties of the control law are discussed.

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