PULSE Reflex Shock Response Spectrum
PULSE Reflex Shock Response computes the shock response spectrum (SRS) from transients in the time domain.
The advantages of the Shock Response Spectrum implementation in PULSE Reflex are:
- Over and above importing acceleration transients, the engineer can import velocity or displace-ment data which will automatically be differentiated to acceleration data before the Shock Response Spectrum calculation
- Pre-processing includes DC removal and accelerometer drift correction. For pyroshock applications it may be desirable to force the end velocity of the input to zero before computing the shock response. This feature is implemented as ‘zero velocity change’ as a pre-processing functionality
- The Shock Response Spectrum computation is compatible with the ISO 18431-4:2007 standard for shock response analysis
- The implementation reduces errors at high frequencies by using ramp-invariant z-transform. This is especially useful for applications involving pyroshock. Bias error is reduced using dynamic oversampling which also improves the accuracy of peak detection.
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| PULSE Reflex Shock Response Spectrum user interface |
PULSE Reflex Shock Response Spectrum includes, not only the Shock Response Spectrum calculations, but pre-processing of the shock event. The input data can be viewed in the Time Editor before individual shock events are selected for analysis. These events can be corrected for DC offset, drift and zero end velocity before the Shock Response Spectrum calculation.
A number of well known Shock Response Spectrum models are implemented in the application, including
- Absolute Acceleration
- Equivalent Static Acceleration
- Pseudo Velocity
- Relative Velocity
- Relative Displacement
This means that there are potentially 45 different possibilities for the user; 5 shock response models and 9 amplitude outputs.
