Mechanical Vibration and Shock Measurements |
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Page 102
... limit for measurements can be set to one - third of the ac- celerometer's resonance frequency so that vibration components measured at this limit will be in error by no more than + 12 % ( ~ 1 dB ) . Small , low mass ac- celerometers can ...
... limit for measurements can be set to one - third of the ac- celerometer's resonance frequency so that vibration components measured at this limit will be in error by no more than + 12 % ( ~ 1 dB ) . Small , low mass ac- celerometers can ...
Page 105
... limit is determined by the accelerometer's structural strength . General purpose accelerometers are linear up to 50 to 100 kms - 2 ( 5000 to 10000 g ) which is well into the range of mechanical shocks . For very high shock measurements ...
... limit is determined by the accelerometer's structural strength . General purpose accelerometers are linear up to 50 to 100 kms - 2 ( 5000 to 10000 g ) which is well into the range of mechanical shocks . For very high shock measurements ...
Page 131
... Limit 40 20 0.1 3 Hz Lower Limit , 18 dB / Octave Gain from input to external filter output ( dB ) 100 1 Hz Hz Lower Limit 3 Hz Lower Limit 10 Hz Lower Limit 30 dB / Octave 12 dB / Octave -20 0.1 120 100 80 Acceleration 15 kHz Upper Limit ...
... Limit 40 20 0.1 3 Hz Lower Limit , 18 dB / Octave Gain from input to external filter output ( dB ) 100 1 Hz Hz Lower Limit 3 Hz Lower Limit 10 Hz Lower Limit 30 dB / Octave 12 dB / Octave -20 0.1 120 100 80 Acceleration 15 kHz Upper Limit ...
Contents
INTRODUCTION | 13 |
CHARACTERISTICS OF VIBRATION AND SHOCK | 20 |
RESPONSE OF MECHANICAL SYSTEMS | 40 |
Copyright | |
13 other sections not shown
Common terms and phrases
acceleration accelerometer Acoustic Emission amplitude application averaging axis balancing band bandwidth Brüel & Kjær calibration Charge Amplifier curve damping decibel degree-of-freedom system digital filter displacement dynamic range effects element equation equipment example excitation fatigue force frequency analysis frequency components Frequency Hz frequency range frequency response frequency spectrum function harmonic high frequency impedance input instruments integration Level Recorder limit linear load machine mass mechanical impedance Mechanical vibration method mm/sec modes monitoring motion mounted noise non-linear normally obtained octave output parameters peak piezoelectric preamplifier quency random signals random vibrations real-time resonant frequency rotating rotor S-N curve scale sensitivity Shock and Vibration shock pulse shown sinusoidal spectra spectral density spring structure techniques tion transducer transient transmissibility typical unbalance values velocity vibration and shock vibration isolation vibration level vibration measurements Vibration Meter vibration signals vibration test visco-elastic