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¶
3 citations across 3 artifacts.
Each citation links to the sentence it supports in the citing article.
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.
Mechanisms¶
- Delay Compensation Tuning Sheet
- The sheet's whole value is turning "the loop overshoots" into specific, delay-aware settings — the same logic a Smith predictor formalizes in hardware.
This sourceIntroduces the predictive control arrangement now known as the Smith predictor for feedback loops with dead time.
- The sheet's whole value is turning "the loop overshoots" into specific, delay-aware settings — the same logic a Smith predictor formalizes in hardware.
Verification¶
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Registry ID ref:64c5fb907f38 · see in the full table