In the operation of a proportional-plus-reset...

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Question 1 of 205eccefa5bacbc34ba4d48807

In the operation of a proportional-plus-reset controller, the proportional action __________. aids the reset action during increasing error transients and the reset action are completely independent of one another

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🔍 Key Concepts

• Proportional control (P) action in a PI (proportional-plus-reset) controller • Reset (integral, I) action and how it responds to sustained error • Dynamic response to an increasing error transient (how P vs I behave when error is changing quickly)

💭 Think About

• Think about how proportional action reacts when the error suddenly increases: does it immediately change the output, or does it build up over time? • Consider what the reset (integral) part does when there is a steady error versus a fast-changing error—does it mainly help with offset, dynamics, or both? • Ask yourself whether P and I in a PI controller are designed to support each other’s behavior during transients, or whether they operate without influencing each other’s actions.

✅ Before You Answer

• Be clear on the definition of reset (integral) action: it is related to the time-accumulation of error, not just the instantaneous error. • Verify whether proportional action directly affects how fast the integral term builds, or if they truly function in isolation. • Check if, in a typical PI controller, the output during a transient is the sum of P and I contributions, and how that affects the statement that they are "completely independent".

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