Relay Auto-Tuning
Replaces the controller with an on-off relay of amplitude d, driving the loop into a small controlled limit cycle; the oscillation amplitude a and period give Ku ≈ 4d/(pi*a) and Pu without ever pushing the plant to instability. The Astrom-Hagglund method behind the 'autotune' button on commercial controllers.
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Replaces the controller with an on-off relay of amplitude d, driving the loop into a small controlled limit cycle; the oscillation amplitude a and period give Ku ≈ 4d/(pi*a) and Pu without ever pushing the plant to instability. The Astrom-Hagglund method behind the 'autotune' button on commercial controllers.
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