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Process Control: Modeling, Design, and Simulation by B. Wayne Bequette

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M6.6. Summary

Frequency-response techniques have been used to study the robustness of a simple first-order + time-delay process model. The gain margin is a measure of gain uncertainty that can be tolerated, while phase margin is a measure of dead time uncertainty that can be tolerated. An uncertain time constant affects both the gain margin and phase margin.

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