The Nyquist Criterion is a fundamental principle used in control systems and stability analysis, which determines the stability of a system based on the open-loop frequency response. It connects the behavior of a system to its frequency response, allowing for the assessment of stability margins by analyzing the Nyquist plot, which represents how the system's output responds to various frequencies of input signals. This criterion helps engineers design and analyze feedback systems to ensure they perform reliably without oscillations or instability.
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