Glossary: Sensitivity Response

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Sensitivity Response

The sensitivity response type is also used to adjust and identify axis performance. The sensitivity response is the response from a position command input at r to the position error output at e without feedforward compensation. This is equivalent to the response from a process disturbance at d to the feedback control effort at u_c. The sensitivity response identifies how the servo loop responds to disturbances, where a lower sensitivity magnitude makes the axis better at rejecting disturbances at that frequency. This response type also shows the sensitivity peak to make sure that the axis is stable.