Sub-Miniature Pressure Sensor Installation for UH-60A Main Rotor Blade Air Loads Flight Test Program
Author
Gagnon, RobertAffiliation
United TechnologiesIssue Date
1989-11
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Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.Abstract
A UH-60A (Black Hawk) full-scale main rotor blade has been instrumented with 242 subminiature pressure transducers placed beneath the blade skin. The instrumented blade will be flight tested on a UH-60A helicopter at the AMES Research Center. The pressure transducers are of the sub-miniature silicon full-bridge type with a small diameter tube (.028 inches OD) leading into the pressure sensing cavity. Fifty of the transducers have built-in temperature monitoring sensors used in correcting the pressure data. The pressure signals and corresponding temperature signals will be processed by PCM Encoders and FM mulitplex systems. This paper describes the following: the pre-selection testing of the pressure transducers which included sensitivity, centrifugal effects, fatigue testing, etc.; the mechanical method of installing the transducers as well as the wiring installation beneath the main rotor blade skin surface and the final/periodic calibration of the installed transducers by using a "Vacuum bag" which encompasses the entire main rotor blade.Sponsors
International Foundation for TelemeteringISSN
0884-51230074-9079