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Foundation ::
Engineering Applications ::
SHAFT ORBIT
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SHAFT ORBIT
Shaft Orbit Display program
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SOURCE CODE AVAILABLE
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When testing turbopumps, invaluable information concerning the position and condition of a shaft can be gained by placing two displacement sensors 90 degrees from each other perpendicular to the shaft. Until now, this information could only be displayed during the test as a flat, Lissajous display on an oscilloscope. SHAFT ORBIT displays digitized voltage readings from these sensors in a 3-D graph of x/y coordinates versus time to show the shaft's position, balance and overall health in near real time. This program is able to display this data over the length of the test. This allows comparison of the shaft orbit at the beginning of the test with successive orbits throughout the test, something which oscilloscope monitoring was incapable of doing. All of this data is then stored on disk for easy post-test manipulation.
SHAFT ORBIT utilizes a Tektronix 7D20 digitizing oscilloscope, a National Instruments IEEE-488 interface and controller, and the Tekmar Graphics Library package from Advanced Systems Consultants to perform real-time graphics.
SHAFT ORBIT carries the NASA case number MFS-29732. It was originally released as part of the COSMIC collection.
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