Small Signal Gain

This block is included only in the PLECS Standalone library.

Purpose

Measure loop gain of closed control loop using small-signal analysis

Library

Control / Small Signal Analysis

Description

../../_images/smallsignalgain.svg

This block uses the Small Signal Perturbation block and the Small Signal Response block to inject a perturbation into a feedback loop and measure the system response. To see the implementation choose Look under mask from the Edit > Subsystem menu or the block’s context menu.

For detailed information regarding small-signal analysis see chapter Analysis Tools.

Parameters

Compensate for negative feedback

When set to on, the underlying Small Signal Response block inverts the reference input in order to compensate for a negative unity gain that is introduced when the feedback signal is subtracted from a reference signal.

When set to off, the reference input is taken as is.