Open-Loop System
Updated 2026-08-08
INTRODUCTION
English translation pending.
CORE DEFINITION
In control theory, an open-loop system applies a predetermined input without measuring the output, as a washing machine does when it stops after a set time regardless of whether the clothes are clean. Such designs are simple and cheap but cannot correct for disturbances or model error. Closed-loop systems, which compare output against a target and adjust, are the alternative when accuracy matters.
SCAFFOLDING EFFECT
Reduce cognitive load
- Check for feedback: ask whether the system ever measures what it produced before deciding again - Spot blind execution: treat any rule applied without regard to results as open-loop - Add the sensor: install a feedback path when disturbances or model error are large
Anchor fast decisions
Because no measurement of the result returns to the controller, the system cannot know whether its action worked. Errors accumulate unchecked until an external observer intervenes. The design is adequate only when the environment is stable and the model is accurate enough that the planned action stays correct on its own.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Open-loop_controllerverified
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