Edge Detector

(To be removed) Detect change in logical signal state

The Specialized Power Systems library will be removed in R2026a. Use the Simscape™ Electrical™ blocks and functions instead. For more information on updating your models, see Upgrade Specialized Power System Models to use Simscape Electrical Blocks.

Library

Simscape / Electrical / Specialized Power Systems / Control

  • Edge Detector block

Description

The Edge Detector block outputs a needle impulse when a change in the logical input is detected.

The Edge Detector block can be programmed to detect a rising edge (when the input goes from false to true), a falling edge (when the input goes from true to false), or either edge (any change in input is detected).

Parameters

Edge detection

Select the detection criteria triggering the output impulse. Choices are Rising (default), Falling, or Either.

Initial condition of previous input

Specify the initial value of the previous input. The Edge Detector block can detect an edge at t = 0 if the input is different from the specified value. Default is 0.

Sample time (-1 for inherited)

Specify the sample time of the block, in seconds. Set to 0 to implement a continuous block. Default is 0.

Inputs and Outputs

The input signal must be a Boolean signal. The output is Boolean.

Characteristics

Direct FeedthroughYes
Sample TimeSpecified in the Sample Time parameter
Scalar ExpansionYes
DimensionalizedYes
Zero-Crossing DetectionYes

Version History

Introduced in R2013a