Formulas: Instantaneous Root-Mean-Square (rms)

MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests

Last Updated 29 Oct 2026

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Formula 1

For the measurement $a(t)$ $0\leq t\leq T$ , the instantaneous rms level is defined over the same interval

0\leq t\leq T

as follows: $a_{inms}(t)=\sqrt{a^{2}(t)}\geq0$ for $0\leq t\leq T$ , where “irms" stands for “instantaneous root-mean-square level".

a_{inms}(t)=\sqrt{a^{2}(t)}\geq0

MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests

Last Updated 29 Oct 2026

Hover any section to copy its link or text, ask Copilot about it, or bookmark it.

For the measurement $a(t)$ $0\leq t\leq T$ , the instantaneous rms level is defined over the same interval

0\leq t\leq T

as follows: $a_{inms}(t)=\sqrt{a^{2}(t)}\geq0$ for $0\leq t\leq T$ , where “irms" stands for “instantaneous root-mean-square level".

a_{inms}(t)=\sqrt{a^{2}(t)}\geq0