scholarly journals Damper based on the magnetorheological elastomer for active vibration isolation of nanotechnological equipment

2013 ◽  
Author(s):  
В.П. Михайлов ◽  
◽  
И.К. Зобов ◽  
А.С. Селиваненко ◽  
◽  
...  
Keyword(s):  
Vibration Isolation ◽  
Magnetorheological Elastomer ◽  
Active Vibration ◽  
Active Vibration Isolation

Research of the mechanical properties of a magnetorheological elastomer for an active vibration isolation system

2021 ◽  
pp. 60-64
Author(s):  
Keyword(s):  
Mechanical Properties ◽  
Polymer Material ◽  
Vibration Isolation ◽  
Gas Release ◽  
Magnetorheological Elastomer ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Active Vibration ◽  
Isolation Systems ◽  
Active Vibration Isolation

The use of a magnetorheological elastomer (MRE) — polymer material, in vibration isolation systems is considered. The best composition and concentration of MRE components for active vibration isolation systems operating in vacuum are determined. Keywords: magnetorheological elastomer, polymer material, tension, compression, vacuum, gas release, active vibration isolation, deformation. [email protected]

scholarly journals Tilt Active Vibration Isolation Using Vertical Pendulum and Piezoelectric Transducer with Parallel Controller

2021 ◽  
Vol 11 (10) ◽  
pp. 4526
Author(s):  
Lihua Wu ◽  
Yu Huang ◽  
Dequan Li
Keyword(s):  
Piezoelectric Transducer ◽  
Vibration Isolation ◽  
Vertical Vibration ◽  
Open Loop ◽  
Negative Effects ◽  
Voltage Controller ◽  
Hysteresis Nonlinearity ◽  
Passive Vibration Isolation ◽  
Active Vibration ◽  
Active Vibration Isolation

Tilt vibrations inevitably have negative effects on some precise engineering even after applying horizontal and vertical vibration isolations. It is difficult to adopt a traditional passive vibration isolation (PVI) scheme to realize tilt vibration isolation. In this paper, we present and develop a tilt active vibration isolation (AVI) device using a vertical pendulum (VP) tiltmeter and a piezoelectric transducer (PZT). The potential resolution of the VP is dependent on the mechanical thermal noise in the frequency bandwidth of about 0.0265 nrad, which need not be considered because it is far below the ground tilt of the laboratory. The tilt sensitivity of the device in an open-loop mode, investigated experimentally using a voltage controller, is found to be (1.63±0.11)×105 V/rad. To compensate for the hysteresis nonlinearity of the PZT, we experimentally established the multi-loop mathematical model of hysteresis, and designed a parallel controller consisting of both a hysteresis inverse model predictor and a digital proportional–integral–differential (PID) adjuster. Finally, the response of the device working in close-loop mode to the tilt vibration was tested experimentally, and the tilt AVI device showed a good vibration isolation performance, which can remarkably reduce the tilt vibration, for example, from 6.0131 μrad to below 0.0103 μrad.

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