Analytical and experimental study on a piezoelectric linear motor

1998 ◽  
Vol 7 (3) ◽  
pp. 382-388 ◽  
Author(s):  
Shih-Fu Ling ◽  
Hejun Du ◽  
Tieying Jiang
Keyword(s):  
Experimental Study ◽  
Linear Motor

scholarly journals Novel permanent magnet linear motor with isolated movers: Analytical, numerical and experimental study

2014 ◽  
Vol 85 (10) ◽  
pp. 105007 ◽  
Author(s):  
Liang Yan ◽  
Juanjuan Peng ◽  
Zongxia Jiao ◽  
Chin-Yin Chen ◽  
I-Ming Chen
Keyword(s):  
Experimental Study ◽  
Permanent Magnet ◽  
Linear Motor ◽  
Permanent Magnet Linear Motor

Experimental Study of Linear Motor Direct-Driven Thermocompressor

2013 ◽  
Vol 732-733 ◽  
pp. 1147-1152
Author(s):  
Xiao Hua Wu ◽  
Lu Wei Yang ◽  
Jun Ling Yang ◽  
Wen Ye Lin
Keyword(s):  
Experimental Study ◽  
Total Mass ◽  
Peak Pressure ◽  
Heating Temperature ◽  
Pressure Ratio ◽  
Linear Motor ◽  
Filling Pressure ◽  
Pulse Tube ◽  
Optimal Frequency ◽  
Better Than

A prototype thermocompressor driven by linear motor was setup and experimental tudied. Peak-peak pressure in the system was influenced by the regenerator, the heating temperature and the gap clearance between piston and cylinder. The optimal frequency of the system was determined by spring constant and total mass of piston, shaft and moving iron. The peak-peak pressure was found to change little with filling pressure when the heating temperature was lower than 250°C, employing with N2 or He4 as the working substance. But when the heating temperature was higher than 250°C, peak-peak pressure increased with filling pressure. Besides, Helium4 was found to perform better than Nitrogen as the working substance. For heating temperature of 650°C and cooling temperature of 40°C, the peak-peak pressure could reach 0.412MPa with pressure ratio of 1.13 when the filling pressure was 2.2MPa, which could be used to drive the pulse tube crycooler (PTC).

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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