Application of low-power, high-rate PCM telemetry in a helicopter instrumentation systemThe use of low-power, high-rate pulse code modulation (PCM) in a helicopter instrumentation system is examined. A Helicopter Instrumentation and Recording System (HIARS) was developed to obtain main rotor blade measurements and fuselage performance measurements. The HIARS consists of a low-power PCM telemeter, a digital PCM system, an optical rotor position sensor, and a PCM decommutation unit; the components and functions of these subsystems are described. Flight tests were conducted to evaluate the ability of the HIARS to measure aircraft parameters. The test data reveal that the PCM telemetry is applicable to helicopter instrumentation systems.
Document ID
19870043826
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thomas, Mitchel E. (NASA Langley Research Center Hampton, VA, United States)
Diamond, John K. (NASA Langley Research Center Hampton, VA, United States)