Construct · 1 fields · 2 citations

stability margin: a standalone construct

One name. One construct. A landmark on the map.

● anchor · standalone: control theory Nearest construct by meaning·not indexed
stabilitymargin1 CONSTRUCTStability marginNYQUIST · 1932

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Control engineering

How much loop gain or phase you can lose before instability

A stability margin measures how close a feedback loop sits to the brink of instability, expressed as the extra gain or phase lag the open loop could absorb before its response would begin to sustain oscillation. The idea rests on Nyquist's 1932 Regeneration Theory, which tied closed-loop stability to how the open-loop response encircles the critical point, and texts such as Ogata's Modern Control Engineering formalise the gain margin and phase margin read from that response. The referent is a quantitative cushion of relative stability (larger margins mean a more robust, better-damped loop), and it anchors the robustness vocabulary of classical control.[1][2]

Unit
The gain margin (in decibels) and phase margin (in degrees) of the open loop
Recovery means
Not applicable
Measured by
Read from the open-loop frequency response as the gain at phase crossover and the phase at gain crossover relative to the stability boundary

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Nearby constructs

feedback4 fields · 5 citationsjingle · one word, four constructslag3 fields · 4 citationsjingle · one word, three constructserror4 fields · 8 citationsjingle · one word, four constructs

References

  1. Nyquist, H. (1932). Regeneration theory. Bell System Technical Journal, 11(1), 126–147. https://doi.org/10.1002/j.1538-7305.1932.tb02344.x
  2. Ogata, K. (2010). Modern control engineering (5th ed.). Prentice Hall. ISBN 9780136156734

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