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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

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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 Subsystem submenu of the block's context menu.

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

Parameter

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.