Vibration Control of a Flexible Beam with Input Backlash

Abstract The idea of a tendon vibration control system for a beam-like flexible space structure has been proposed. To verify the feasibility of the concept, an experimental tendon control system has been constructed for the vibration control of a flexible beam simulating Large Space Structures (LSS). This paper discusses modeling, identification, actuator disposition, and controller design for the experimental system. First, a mathematical model of the whole system of the beam and tendon actuator is developed through a finite element method (FEM). Second, to obtain an accurate mathematical model for designing a controller, unknown characteristic parameters are estimated by using an output error method. The validity of the proposed identification scheme is demonstrated by good agreement between the transfer functions of the experimental system and an identified model. Then, disposition of actuators is discussed by using the modal cost analysis. Finally, controllers are designed for SISO and MIMO systems. The feasibility of the proposed controller is verified through numerical simulation and hardware experiments.

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EXPERIMENTAL STUDY ON VIBRATION CONTROL OF SHAPE MEMORY ALLOY ACTUATED FLEXIBLE BEAM

International Journal on Smart Sensing and Intelligent Systems ◽

10.21307/ijssis-2017-387 ◽

2010 ◽

Vol 3 (2) ◽

pp. 156-175 ◽

Cited By ~ 4

Author(s):

K. Dhanalakshmi ◽

Aditya Avinash ◽

M. Umapathy ◽

M. Marimuthu

Keyword(s):

Experimental Study ◽

Shape Memory Alloy ◽

Shape Memory ◽

Vibration Control ◽

Flexible Beam

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

Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc99/vib-8303 ◽

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.

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