Vibration isolation of a beam via negative resistance electromagnetic shunt dampers

In this study, two novel electromagnetic shunt damping vibration isolators (EMSD-VIs) were developed for the vibration isolation of a beam structure. The proposed isolator utilizes a pair of electromagnetic coils and permanent magnet and a box-shaped spring to generate both variable damping and spring effect. The governing equation of the EMSD-VI-supported beam was established according to Galerkin method. The negative resistance was proposed to improve the performance of the isolator. The stability analysis was investigated to determine the design rules of the shunted negative resistance. The acceleration transmissibility of the beam system was simulated by using passive EMSD-VI control and negative resistance (NR)-EMSD-VI control. The experiment was conducted to verify the theoretical model and the numerical simulation. The experimental results demonstrated that the proposed NR-EMSD-VI is capable of isolating the first-order and the third-order vibrations. Also, a discussion of the resonance frequency shift toward higher value was given.

[1]  Il-Kwon Oh,et al.  Electromagnetic multi-mode shunt damper for flexible beams based on current flowing circuit , 2009, International Conference on Smart Materials and Nanotechnology in Engineering.

[2]  Xinong Zhang,et al.  Damper based on electromagnetic shunt damping method , 2010 .

[3]  Xinong Zhang,et al.  A new electromagnetic shunt damping treatment and vibration control of beam structures , 2009 .

[4]  Jiong Tang,et al.  Damping Reduction in Structures Using Piezoelectric Circuitry With Negative Resistance , 2011 .

[5]  Daniel J. Inman,et al.  Application of a Negative Capacitance Circuit in Synchronized Switch Damping Techniques for Vibration Suppression , 2011 .

[6]  J. Wallaschek,et al.  Vibration damping with piezoceramics shunted to negative capacitance networks , 2009, 2009 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

[7]  Nesbitt W. Hagood,et al.  Damping of structural vibrations with piezoelectric materials and passive electrical networks , 1991 .

[8]  S.O.R. Moheimani,et al.  Inertial vibration control using a shunted electromagnetic transducer , 2006, IEEE/ASME Transactions on Mechatronics.

[9]  S. O. Reza Moheimani,et al.  Vibration isolation using a shunted electromagnetic transducer , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[10]  S.O. Reza Moheimani,et al.  Electromagnetic shunt damping , 2003, Proceedings 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM 2003).

[11]  Chul H. Park,et al.  Multiple-mode structural vibration control using negative capacitive shunt damping , 2003 .

[12]  S.O.R. Moheimani,et al.  Passive vibration control via electromagnetic shunt damping , 2005, IEEE/ASME Transactions on Mechatronics.

[13]  Tadao Takigami,et al.  Vibration suppression of scale model of railway carbody with piezoelectric elements: a study focused on designing shunt circuits , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[14]  A. Preumont,et al.  Vibration damping with negative capacitance shunts: theory and experiment , 2008 .

[15]  Manuel Collet,et al.  Experimental assessment of negative impedance shunts for vibration suppression on a beam , 2008, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[16]  Kon Well Wang,et al.  An Active-Passive Piezoelectric Absorber for Structural Vibration Control Under Harmonic Excitations With Time-Varying Frequency, Part 1: Algorithm Development and Analysis , 2002 .