Experimental study of an ER long-stroke vibration damper

1997 ◽  
Author(s):  
David J. Peel ◽  
Roger Stanway ◽  
William A. Bullough
Keyword(s):  
Experimental Study ◽  
Vibration Damper ◽  
Long Stroke

An ER Long-Stroke Damper: Performance Modelling Under Quasi-Steady Conditions

1995 ◽  
Author(s):  
David J. Peel ◽  
Roger Stanway ◽  
John L. Sproston ◽  
William A. Bullough
Keyword(s):  
Temperature Effects ◽  
Excitation Frequency ◽  
Fluid Inertia ◽  
Vibration Damper ◽  
Performance Modelling ◽  
Piston Cylinder ◽  
Force Velocity ◽  
Long Stroke

Abstract A hydraulic piston/cylinder arrangement is connected to an externally located ER valve to provide a controllable vibration damper. This arrangement is analysed and a technique developed to predict the force/velocity characteristics under quasi-steady conditions. The basis of the technique is a generalised non-dimensional presentation of fluid-alone data. In the work described here fluid inertia, compressibility and temperature effects are not included. This limits the application of the results to cases where the excitation frequency is low whilst allowing a clear portrayal of the potential controllability of a long-stroke damping device.

Modeling and control of an ER long-stroke vibration damper

1998 ◽  
Author(s):  
David J. Peel ◽  
Roger Stanway ◽  
William A. Bullough
Keyword(s):  
Vibration Damper ◽  
Modeling And Control ◽  
Long Stroke ◽  
And Control

Feedback control of an electrorheological long-stroke vibration damper

1999 ◽  
Author(s):  
Neil D. Sims ◽  
Roger Stanway ◽  
Andrew R. Johnson ◽  
David J. Peel ◽  
William A. Bullough
Keyword(s):  
Feedback Control ◽  
Vibration Damper ◽  
Long Stroke

Experimental testing and control of an ER long-stroke vibration damper

2001 ◽  
Author(s):  
Neil D. Sims ◽  
Roger Stanway ◽  
Andrew R. Johnson
Keyword(s):  
Experimental Testing ◽  
Vibration Damper ◽  
Long Stroke ◽  
And Control

Experimental Study on Reducing Diesel Engine Noise by Using Torsional Vibration Damper

2013 ◽  
Vol 321-324 ◽  
pp. 90-93
Author(s):  
Zhi Gang Zhang
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Torsional Vibration ◽  
Power Level ◽  
Direct Injection ◽  
Sound Power ◽  
Vibration Damper ◽  
Sound Power Level ◽  
Turbo Charge ◽  
Four Cylinders

The noise of the engine and torsional vibration of the engine’s shafting is been tested. The engine is a direct injection turbo charge inter-cooling four cylinders one. In the testing, the original pulley and three different torsional vibration dampers are compared.The result shows that it can reduce the vibration of the shafting, triangular belt, the accessory, and can reduce 1 to 2 decibel of the engine’s sound power level by using the torsional vibration damper.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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