A 'Proportional Only' controlled automatic...

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Question 1 of 205eccefa5bacbc34ba4d4884d

A 'Proportional Only' controlled automatic process loop is oscillating continually, above and below the setpoint. To stabilize this controller and loop using the 'gain' adjustment, what controller/loop response would you expect upon process changes vs. setpoint?

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🔍 Key Concepts

• Proportional-only control behavior when gain is too high vs. too low • Relationship between gain (P-band) and tendency to oscillate or overdamp • Difference between gain (proportional) and reset (integral) in a controller

💭 Think About

• If a proportional-only loop is continually oscillating, what does that usually say about whether the gain is too high or too low? • When tuning for a classic "quarter-wave" response, do you increase or decrease gain from the point of continuous cycling? • Which adjustment (gain vs. reset) actually applies in a strictly proportional-only controller?

✅ Before You Answer

• Confirm whether a proportional-only controller uses any reset (integral) action at all • Think about how reducing gain affects overshoot and oscillations in basic feedback systems • Match the answer choice wording to the idea of a quarter-wave decay (each swing smaller than the last by about 1/4).

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