Thermal distortion testing of a 90-degree deployment hinge

Details Thermal distortion testing of a 90-degree deployment hinge Thermal distortion testing of a 90-degree deployment hinge

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.524..361l&link_type=abstract

In: Proceedings of the 10th European Space Mechanisms and Tribology Symposium, 24-26 September 2003, San Sebastián, Spain. Compi

Computer Science

Performance

Deployment Mechanisms

Scientific paper

Virtually all modern spacecraft have at least one (if not many) deployable items, some of which require a high degree of positional accuracy and repeatability. There are many variables that affect the deployment performance, and often the most critical and difficult variable to quantify is the affect of the thermal environment on the deployment mechanisms. Temperature changes before and after deployment can greatly affect the final deployment position and the subsequent thermal distortion of the mechanism, and it is critical to properly quantify these factors. Historically the affects of temperature change on deployment mechanisms have been evaluated via analysis due to the relative cost and difficulty in performing a test. However, during the design process of a recent Lockheed Martin deployment hinge, the engineers wanted to provide their customer with a more reliable empirical assessment. Thus, it was decided to conduct a thermal distortion and repeatability test on the hinge during the qualification phase. Testing of this nature is very rare for relatively inexpensive deployment hinges and is usually reserved for high precision, actively-latched optical hinges. Results of this testing are presented, along with lessons learned when performing the test.

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