Basic considerations in flowing electrorheological fluids

1991 ◽  
Vol 64 (5-6) ◽  
pp. 1059-1072 ◽  
Author(s):  
James E. Stangroom
Keyword(s):  
Electrorheological Fluids

Coating of Polyaniline with an Insulating Polymer to Improve the Power Efficiency of Electrorheological Fluids

1999 ◽  
Vol 13 (14n16) ◽  
pp. 1931-1939 ◽  
Author(s):  
J. Akhavan ◽  
K. Slack ◽  
V. Wise ◽  
H. Block
Keyword(s):  
Power Efficiency ◽  
Electrorheological Fluids ◽  
Emeraldine Base ◽  
Heavy Duty ◽  
Base Form ◽  
Static Yield ◽  
High Fields ◽  
Er Fluids ◽  
Er Fluid ◽  
A Current

Currents drawn under high fields often present practical limitations to electrorheological (ER) fluids usefulness. For heavy-duty applications where large torques have to be transmitted, the power consumption of a ER fluid can be considerable, and for such uses a current density of ~100μ A cm -2 is often taken as a practical upper limit. This investigation was conducted into designing a fluid which has little extraneous conductance and therefore would demand less current. Selected semi-conducting polymers provide effective substrates for ER fluids. Such polymers are soft insoluble powdery materials with densities similar to dispersing agents used in ER formulations. Polyaniline is a semi-conducting polymer and can be used as an effective ER substrate in its emeraldine base form. In order to provide an effective ER fluid which requires less current polyaniline was coated with an insulating polymer. The conditions for coating was established for lauryl and methyl methacrylate. Results from static yield measurements indicate that ER fluids containing coated polyaniline required less current than uncoated polyaniline i.e. 0.5μ A cm -2. The generic type of coating was also found to be important.

Experiment on dual-chamber parallel piezoelectric stack pump for electrorheological fluids

2011 ◽  
Author(s):  
Jianfang Liu ◽  
Xuguang Sun ◽  
Guojun Liu ◽  
Xiaotao Li ◽  
Yong Liu
Keyword(s):  
Electrorheological Fluids ◽  
Dual Chamber

Temperature effect of electrorheological fluids based on polyaniline derived carbonaceous nanotubes

2010 ◽  
Vol 20 (1) ◽  
pp. 015002 ◽  
Author(s):  
Jianbo Yin ◽  
Xiang Xia ◽  
Liqin Xiang ◽  
Xiaopeng Zhao
Keyword(s):  
Temperature Effect ◽  
Electrorheological Fluids

scholarly journals Modeling, Mathematical and Numerical Analysis of Electrorheological Fluids

2004 ◽  
Vol 49 (6) ◽  
pp. 565-609 ◽  
Author(s):  
Michael Růžička
Keyword(s):  
Numerical Analysis ◽  
Electrorheological Fluids

Nonlinear Modeling and Control of Hysteresis in Active Material Systems

1999 ◽  
Author(s):  
Glenn V. Webb ◽  
Dimitris C. Lagoudas ◽  
Andrew J. Kurdila
Keyword(s):  
Shape Memory ◽  
Nonlinear Modeling ◽  
Active Material ◽  
Electrorheological Fluids ◽  
Adaptive Model ◽  
Structural System ◽  
Modeling And Control ◽  
Significant Challenge ◽  
Hysteresis Nonlinearity ◽  
And Control

Abstract Active material actuators present a significant challenge to researchers interested in applying them to aerospace structures. Materials such as shape memory alloys, piezo-ceramcs and electrorheological fluids exhibit hysteresis to varying degrees. Not only do they exhibit hysteresis, but in some cases the hysteresis is non-stationary. We present a methodology that allows for design of controllers for the structural system from linear system theory. This is accomplished by compensating, or linearizing, the hysteresis nonlinearity using an adaptive model of hysteresis. Experimental results for adaptive control of shape memory alloy actuators with non-stationary hysteresis are provided.

Properties of Electrorheological Fluids Containing Numerously Sulfonated Polymer Particles

1995 ◽  
pp. 147-156 ◽  
Author(s):  
Yoshinobu Asako ◽  
Satoru Ono ◽  
Ryuji Aizawa ◽  
Toshihiro Kawakami
Keyword(s):  
Electrorheological Fluids ◽  
Polymer Particles

POLAR MOLECULE TYPE ELECTRORHEOLOGICAL FLUIDS

2007 ◽  
Author(s):  
KUNQUAN LU ◽  
RONG SHEN ◽  
XUEZHAO WANG ◽  
GONG SUN ◽  
WEIJIA WEN ◽  
...  
Keyword(s):  
Polar Molecule ◽  
Electrorheological Fluids ◽  
Molecule Type
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