Active and passive noise control using electroactive polymer actuators (EAPAs)

1999 ◽  
Author(s):  
Kartik Ramanathan ◽  
Bei Zhu ◽  
Woosuk Chang ◽  
Vasundara V. Varadan ◽  
Vijay K. Varadan
Keyword(s):  
Noise Control ◽  
Electroactive Polymer ◽  
Polymer Actuators ◽  
Passive Noise

Electroactive polymer actuators as artificial muscles: are they ready for bioinspired applications?

2011 ◽  
Vol 6 (4) ◽  
pp. 045006 ◽  
Author(s):  
Federico Carpi ◽  
Roy Kornbluh ◽  
Peter Sommer-Larsen ◽  
Gursel Alici
Keyword(s):  
Electroactive Polymer ◽  
Artificial Muscles ◽  
Polymer Actuators

Active Helmholtz Resonator With Positive Real Impedance

2006 ◽  
Vol 129 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Jing Yuan
Keyword(s):  
Noise Control ◽  
Helmholtz Resonator ◽  
Control Device ◽  
Positive Real ◽  
Noise Field ◽  
Strictly Positive Real ◽  
Control Devices ◽  
Passive Noise ◽  
Active Resonator ◽  
Electronic Resonance

The impedance of a passive noise control device is strictly positive real, if the device is installed in noise fields with weak mean flows. Passive noise control devices are, therefore, more reliable than active ones. Active control may be applied to a Helmholtz resonator to introduce electronic resonance. It will affect the impedance Zact of the resonator. A controller may be designed such that (a) Zact is small and resistive at some tunable frequencies; and (b) Re{Zact}⩾0 in the entire frequency range of interest. If criterion (a) is satisfied, the active resonator can suppress duct noise at tunable frequencies. It is difficult to design a controller to satisfy criterion (b) because parameters of the controller depend on acoustic parameters of the noise field. A new method is proposed here to design an active controller to meet both criteria simultaneously. The satisfaction of criterion (b) implies a positive real Zact and a robust active resonator with respect to parameter variation in the noise field. Experimental results are presented to verify the performance of the active resonator.

Hybrid active and passive noise control in ventilation duct with internally placed microphones module

2022 ◽  
Vol 188 ◽  
pp. 108525
Author(s):  
Lifu Wu ◽  
Lei Wang ◽  
Shuaiheng Sun ◽  
Xinnian Sun
Keyword(s):  
Noise Control ◽  
Passive Noise ◽  
Ventilation Duct

Micro-mechanics of ionic electroactive polymer actuators

2015 ◽  
Author(s):  
Andres Punning ◽  
Inga Põldsalu ◽  
Friedrich Kaasik ◽  
Veiko Vunder ◽  
Alvo Aabloo
Keyword(s):  
Electroactive Polymer ◽  
Polymer Actuators

Martian jumping rover equipped with electroactive polymer actuators: A preliminary study

2007 ◽  
Vol 43 (1) ◽  
pp. 79-92 ◽  
Author(s):  
Federico Carpi ◽  
Aldo Tralli ◽  
Danilo Rossi ◽  
Paolo Gaudenzi
Keyword(s):  
Electroactive Polymer ◽  
Polymer Actuators ◽  
Preliminary Study

Utilization of electroactive polymer actuators in micromixing and in extended-life biosensor applications

2010 ◽  
Author(s):  
Vinh Ho ◽  
Mark Shimada ◽  
David Szeto ◽  
Xavier Casadevall i Solvas ◽  
Daniel Scott ◽  
...  
Keyword(s):  
Electroactive Polymer ◽  
Polymer Actuators ◽  
Extended Life ◽  
Biosensor Applications
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