DRMS

R2026b

Compute discrete-time, cumulative root mean square (DRMS) of signal

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DRMS block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simulink Design Optimization / RMS Blocks

Description

Attach the DRMS block to a signal to compute its discrete-time, cumulative root mean square (DRMS) value, which provides a measure of the average energy in a signal.

The discrete-time, cumulative root mean square value of a signal u(t) is defined as

$$DRMS=\sqrt{\frac{1}{N}{\displaystyle \sum _{i=1}^N{\Vert u(t_i)\Vert }^2}}$$

To optimize the signal energy, use this block in conjunction with the Check Custom Bounds block.

Ports

Input

Port_1 — Input signal

scalar

Input value, specified as a scalar signal.

Output

Port_1 — DRMS value

scalar

Computed discrete-time, root mean square value, output as a scalar signal.

Parameters

Sampling interval — Sample time

1 (default) | positive scalar

Sample time for computing DRMS value.

Programmatic Use

Parameter: Ts

Value: positive scalar in quotes

Default: '1'

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"sdolib/RMS Blocks/DRMS"

Example: add_block("sdolib/RMS Blocks/DRMS","myModel/myBlock",MakeNameUnique="on")

Version History

Introduced in R2009a