Critique of ballistic vehicle vibration measurements
Abstract
Atmospheric reentry-induced, band-limited vibration response measurements aboard a ballistic vehicle are presently noted to require filtering between sensors and signal-conditioning amplifiers, especially in the cases of channels that monitor locations on, or near, the reentry vehicle's structural shell. Flight test data have suggested, and laboratory experiments have confirmed, that if the excitation energy within the measurement passband is sufficiently low, an over-ranging of the signal conditioner by out-of-band HF excitation will cause the measured environment to be overstated; the spectrum will accordingly appear 'flat'. If the excitation energy is sufficiently high, the measured environment will be understated.
- Publication:
-
SAE
- Pub Date:
- October 1987
- Bibcode:
- 1987saea.conf.....N
- Keywords:
-
- Ballistic Vehicles;
- Flight Tests;
- Frequency Modulation;
- Reentry Vehicles;
- Signal To Noise Ratios;
- Vibration Measurement;
- Data Processing;
- Degrees Of Freedom;
- Instruments;
- Payloads;
- Power Spectra;
- Spectrum Analysis;
- Spacecraft Instrumentation