Computer Science
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.524...49t&link_type=abstract
In: Proceedings of the 10th European Space Mechanisms and Tribology Symposium, 24-26 September 2003, San Sebastián, Spain. Compi
Computer Science
Tribology
Scientific paper
Mechanical components on board spacecraft experience strong vibrations during the launch operations. Such vibrations can adversely affect mechanical components, cause solid lubricant wear, and, in the worst case, lead to a malfunction. During launch operations, a launch vehicle travels from ground to space. Payloads will therefore be subjected to vibrations in vacuum as well as in air. Thus, to realistically simulate vibration effects during the launch operations, vibration tests should also be carried out in vacuum. In our research, a specially designed Vacuum Vibration Test Facility enabled vibration tests in a 10-6 Pa vacuum. A comparison of the vibration test results measured in 10-6 Pa vacuum and 1 atm. revealed the effects of vibrations in vacuum. As a starting point of the research, we selected a solid lubricated ball bearing as a test sample. After the vibration tests, we conducted a surface analysis of the solid lubricant on the bearings and numerical simulations of the test.
Imagawa Kichiro
Maniwa Kazuaki
Obara Shingo
Sasaki Akira
Tanaka Yasuo
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