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Square Root Function Improves Thermostat: 09/30/99 EDN-Design Ideas /
(added 6/03) Perhaps the most elementary rule of control-loop design theory is
that feedback-loop performance is fundamentally linked to the careful choice—and
stability—of loop gain. Insufficient loop gain leads to poor setpoint accuracy.
Too much gain can induce feedback instabilities, such as overshoot, ringing, and,
ultimately, oscillation. Therefore, the greater the accuracy you expect from a
control system, the more critical maintaining near-optimal loop gain becomes. |
