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Amplitude vs frequency for LRM vibration tests based on GR-63-CORE

Amplitude vs frequency for LRM vibration tests based on GR-63-CORE. Jonathan King. IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise. Summary of GR-63-CORE operational tests. Effects of office vibration are simulated by a swept sine wave, with tests in 3 orthogonal axes

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Amplitude vs frequency for LRM vibration tests based on GR-63-CORE

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  1. Amplitude vs frequency for LRM vibration tests based on GR-63-CORE Jonathan King IEEE802.3aq Channel model ad hocTask 2: Time-varying study & modal noise

  2. Summary of GR-63-CORE operational tests • Effects of office vibration are simulated by a swept sine wave, with tests in 3 orthogonal axes • Frequency range and acceleration are defined: • for frame mounted equipment • 0.1g from 5 to 100Hz, test in each of 3 orthogonal axes • for electronic sub assemblies • 1g from 5 to 100Hz, test in each of 3 orthogonal axes Note: constant acceleration definition leads to a 1/f2 amplitude vs frequency characteristic

  3. GR-63-CORE amplitude vs frequency Sinusoid y(t)=A.sin(w.t); Acceleration, a(t) = d2y(t)/dt2 = -(A.(w2).sin(w.t) i.e. Amax= -amax/(w2) notes: p-p amplitude is 2.A At 1Hz, 0.1g, the p-p amplitude is ~2 inches, similar to the TI/EIA-455-203 shaker At 2Hz, 1g, amplitude is ~5 inches p-p , similar to vigorous manual shaking of a fibre coil At 10Hz, 1g, amplitude is ~5mm p-p At 20Hz, and amplitude of ~5mm p-p, the acceleration is 4g (4 times the GR-63-CORE office vibration spec)

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