Closer Control of Loops with Dead Time.¶
Smith, O. J. M. (1957). Closer Control of Loops with Dead Time. Chemical Engineering Progress, 53(5), 217-219.
Cited by¶
2 citations across 2 artifacts.
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Primes¶
- Efference Copy
- It recurs in control engineering as the Smith predictor and internal model control:
This sourceIntroduces the Smith predictor: a forward internal model that compensates for transport delay so control acts on the prediction error rather than the raw delayed output.
- It recurs in control engineering as the Smith predictor and internal model control:
- Latency
- Loops with significant dead time must be detuned, predicted (Smith predictor), or restructured, because a controller that reacts aggressively to delayed feedback chases a state that no longer exists.
This sourceIntroduces the Smith predictor: compensates for transport dead time by acting on a model of the un-delayed state, the canonical compensate-for-delay design move that supply-chain safety-stock reasoning mirrors structurally.
- Loops with significant dead time must be detuned, predicted (Smith predictor), or restructured, because a controller that reacts aggressively to delayed feedback chases a state that no longer exists.
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