Active loose bolt detection in a complex satellite structure

2010 ◽  
Author(s):  
Whitney D. Reynolds ◽  
Derek Doyle ◽  
Brandon Arritt
Keyword(s):  
Satellite Structure ◽  
Loose Bolt Detection

Experimental Study of Impact Modulation for Quantifying Loose Bolt Torque in On-Demand Satellites

2010 ◽  
Author(s):  
Janette L. Jaques ◽  
Douglas E. Adams ◽  
Derek Doyle ◽  
Whitney Reynolds
Keyword(s):  
Experimental Study ◽  
Structural Integrity ◽  
Analytical Models ◽  
Time Constraints ◽  
Variable Geometry ◽  
Bolted Joint ◽  
Rapid Testing ◽  
Satellite Structure ◽  
On Demand ◽  
Loose Bolt Detection

The development of on-demand satellites has created the need for methods that quickly assess the structural integrity of the system. In particular, because of rapid testing and assembly, workmanship errors such as loose bolts within the satellite structure are a concern. Current methods of loose bolt detection, which often rely on baseline data or analytical models, are not practical due to the variable geometry of the satellites and the time constraints on testing. The method of impact modulation is a nonlinear vibration method which is quick to perform and is robust to changes in the geometry of the structure. This paper presents the results of applying impact modulation to a simplified structure used to model a single bolted joint within a satellite. Results show that impact modulation can distinguish changes in torque within the bolted joint. In addition, several examples of how the underlying linear characteristics of the system affect impact modulation results are given.

Auger vacancy satellite structure in the L3M4,5M4,5Auger spectra of copper

1975 ◽  
Vol 8 (13) ◽  
pp. L301-L304 ◽  
Author(s):  
E D Roberts ◽  
P Weightman ◽  
C E Johnson
Keyword(s):  
Satellite Structure

Solid-state effects on the satellite structure of KLL Auger spectra in Cu and Ni

2000 ◽  
Vol 30 (1) ◽  
pp. 199-201 ◽  
Author(s):  
I. Cserny ◽  
L. K�v�r ◽  
H. Nakamatsu ◽  
T. Mukoyama
Keyword(s):  
Solid State ◽  
Satellite Structure ◽  
Auger Spectra

Heavy ion induced Ti X-ray satellite structure for Ti, TiN, and TiO2 thin films

2018 ◽  
Vol 47 (6) ◽  
pp. 475-483 ◽  
Author(s):  
Marko Käyhkö ◽  
Mikko R. J. Palosaari ◽  
Mikko Laitinen ◽  
Kai Arstila ◽  
Ilari J. Maasilta ◽  
...  
Keyword(s):  
Thin Films ◽  
Heavy Ion ◽  
Tio2 Thin Films ◽  
Satellite Structure ◽  
X Ray
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