scholarly journals Cable Pulley Test

2021 ◽  
Author(s):  
Jason Nguyen
Keyword(s):  
Landing Gear ◽  
Small Space ◽  
Pulley System ◽  
Rigid System ◽  
Cluster Interaction ◽  
System A ◽  
Definite Answer ◽  
Structural Deformations

<div>This report will investigate the interactions regarding a cable pulley system within the nose landing gear. There is the possibility of tension drops occurring within this system. A test was done to determine the tension values within the system, this test was to isolate two possibilities that could</div><div>cause the tension drop. These two possibilities were structural deflection within the nose landing gear or the tension loss occurring within the pulley cluster. With this test it was found that there are in fact tension drops when the pulley cluster was used on a rigid system without the structural deformations of the nose landing gear. There are some discrepancies where a basic cable test was done without the pulley cluster and no tension drop was found. This would lead to an investigation to occur after this test</div><div>to determine why the tension drop happens with the cable and pulley cluster interaction. Some reasons to the tension drop within the pulley cluster would be unwinding of the cable as well as deformation occurring. There is however no definite answer for the tension drop as the observation was difficult within such a confined and small space of the pulley cluster.</div>

Cable Pulley Test

2021 ◽  
Author(s):  
Jason Nguyen
Keyword(s):  
Landing Gear ◽  
Small Space ◽  
Pulley System ◽  
Rigid System ◽  
Cluster Interaction ◽  
System A ◽  
Definite Answer ◽  
Structural Deformations

<div>This report will investigate the interactions regarding a cable pulley system within the nose landing gear. There is the possibility of tension drops occurring within this system. A test was done to determine the tension values within the system, this test was to isolate two possibilities that could</div><div>cause the tension drop. These two possibilities were structural deflection within the nose landing gear or the tension loss occurring within the pulley cluster. With this test it was found that there are in fact tension drops when the pulley cluster was used on a rigid system without the structural deformations of the nose landing gear. There are some discrepancies where a basic cable test was done without the pulley cluster and no tension drop was found. This would lead to an investigation to occur after this test</div><div>to determine why the tension drop happens with the cable and pulley cluster interaction. Some reasons to the tension drop within the pulley cluster would be unwinding of the cable as well as deformation occurring. There is however no definite answer for the tension drop as the observation was difficult within such a confined and small space of the pulley cluster.</div>

The thrust measurement system research for combined nozzle in small space

2018 ◽  
Vol 41 (4) ◽  
pp. 1149-1159
Author(s):  
Yonghua Lu ◽  
Jing Li ◽  
Xiang Zhang ◽  
Yang Li
Keyword(s):  
Measurement System ◽  
Force Sensor ◽  
Test Method ◽  
Small Space ◽  
System A ◽  
Calibration Experiment ◽  
Different Types ◽  
Thrust Measurement ◽  
Nozzle Thrust ◽  
Thrust Forces

For measuring the thrust of combined nozzles in satellite thruster with a small space, the test method that the nozzle directly sprays on the load baffle is employed in this paper. The key problem is how to design the positions of 10 load baffles and how to construct the measurement system. A set of complete and automatic nozzle thrust measurement system is designed and built, and the influence of the load baffle applied on the flow field of nozzles is analyzed using the software FLUENT. Furthermore, the load surface locations of the sensors for the different types of nozzles are analyzed. We draw the conclusion that the load baffle position should range from 4–8 mm for the I-type nozzle and range in 6–12 mm for II-type and III-type nozzle. The correction coefficients of the thrust forces for all channels of the measurement system are determined in the calibration experiment. The uncertainty of measurement system is estimated and the error source of the measurement system is traced. We found that the systematic uncertainty is mainly contributed by the A-type uncertainty which is related with the nozzle dimension and its inner structure. The B-type uncertainty of system is contributed by the force sensor.

THE PULLEY SYSTEM: A LAPAROSCOPIC TESTIS RETRACTION AID

2009 ◽  
Vol 181 (4S) ◽  
pp. 384-385
Author(s):  
Richard S Hurwitz
Keyword(s):  
Pulley System ◽  
System A

Reconstruction of The Digital Flexor Pulley System: A Retrospective Comparison of Two Methods of Treatment

2007 ◽  
Vol 32 (1) ◽  
pp. 60-66 ◽  
Author(s):  
R. ARORA ◽  
D. FRITZ ◽  
R. ZIMMERMANN ◽  
M. LUTZ ◽  
F. KAMELGER ◽  
...  
Keyword(s):  
Pulley System ◽  
System A ◽  
Retrospective Comparison ◽  
Methods Of Treatment

Design of Combined Switching Valve of High Pressure Abrasive Jet Mixing System

2014 ◽  
Vol 556-562 ◽  
pp. 1139-1142
Author(s):  
Lei Chen ◽  
Cheng Jun Wang ◽  
Hai Lang Song ◽  
Dong Dong Han ◽  
Juan Chang
Keyword(s):  
High Pressure ◽  
High Reliability ◽  
Small Space ◽  
Compact Structure ◽  
Jet Mixing ◽  
Switching Valve ◽  
System A ◽  
Electric Control ◽  
Control Switch ◽  
Space Occupation

In order to simplify the structure of switching valve groups and reduce the failure rate in the high pressure abrasive jet mixing system, a combined switch valve for the system has been designed. The combined switching valve can implement a motor to drive four spools for two open and two closed electric control switch of high pressure abrasive jet mixing system, which has the advantages of compact structure, small space occupation, convenient control and high reliability.

New Design for a Differentially Pumped Hydration Chamber for a Siemens IA

1971 ◽  
Vol 29 ◽  
pp. 44-45
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Electron Microscopy ◽  
Water Vapor ◽  
Electron Diffraction ◽  
Water Vapor Pressure ◽  
Biological Materials ◽  
Thin Membrane ◽  
Reliable System ◽  
System A ◽  
Water Films ◽  
Aperture Opening

Electron microscopy and diffraction of biological materials in the hydrated state requires the construction of a chamber in which the water vapor pressure can be maintained at saturation for a given specimen temperature, while minimally affecting the normal vacuum of the remainder of the microscope column. Initial studies with chambers closed by thin membrane windows showed that at the film thicknesses required for electron diffraction at 100 KV the window failure rate was too high to give a reliable system. A single stage, differentially pumped specimen hydration chamber was constructed, consisting of two apertures (70-100μ), which eliminated the necessity of thin membrane windows. This system was used to obtain electron diffraction and electron microscopy of water droplets and thin water films. However, a period of dehydration occurred during initial pumping of the microscope column. Although rehydration occurred within five minutes, biological materials were irreversibly damaged. Another limitation of this system was that the specimen grid was clamped between the apertures, thus limiting the yield of view to the aperture opening.

High-resolution electron microscopy of Cu2O surfaces

1986 ◽  
Vol 44 ◽  
pp. 396-397
Author(s):  
V. Castano ◽  
W. Krakow
Keyword(s):  
High Resolution ◽  
Natural Extension ◽  
High Resolution Electron Microscopy ◽  
Point Of View ◽  
Initial Oxidation ◽  
System A ◽  
Resolution Electron ◽  
Surface Reconstructions ◽  
Atomic Surface ◽  
Au Thin Films

In non-UHV microscope environments atomic surface structure has been observed for flat-on for various orientations of Au thin films and edge-on for columns of atoms in small particles. The problem of oxidation of surfaces has only recently been reported from the point of view of high resolution microscopy revealing surface reconstructions for the Ag2O system. A natural extension of these initial oxidation studies is to explore other materials areas which are technologically more significant such as that of Cu2O, which will now be described.

Twin boundary structure of a Y-Ba-Cu-O superconductor

1989 ◽  
Vol 47 ◽  
pp. 168-169
Author(s):  
Yimei Zhu ◽  
Masaki Suenaga ◽  
R. L. Sabatini ◽  
Youwen Xu
Keyword(s):  
Twin Boundary ◽  
Fine Particles ◽  
Imaging Techniques ◽  
Fine Powder ◽  
Orthorhombic Phase ◽  
Boundary Structure ◽  
Crystallographic Axis ◽  
System A ◽  
High Resolution Structure ◽  
Electron Microscopes

The (110) twin structure of YBa2Cu3O7 superconductor oxide, which is formed to reduce the strain energy of the tetragonal to orthorhombic phase transformation by alternating the a-b crystallographic axis across the boundary, was extensively investigated. Up to now the structure of the twin boundary still remained unclear. In order to gain insight into the nature of the twin boundary in Y-Ba-Cu-O system, a study using electron diffraction techniques including optical and computed diffractograms, as well as high resolution structure imaging techniques with corresponding computer simulation and processing was initiated.Bulk samples of Y-Ba-Cu-O oxide were prepared as described elsewhere. TEM specimens were produced by crushing bulk samples into a fine powder, dispersing the powder in acetone, and suspending the fine particles on a holey carbon grid. The electron microscopy during this study was performed on both a JEOL 2000EX and 2000FX electron microscopes operated at 200 kV.

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