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Discrete RMS Value

Purpose

Calculate root mean square (RMS) value of input signal

Library

Control / Discrete

Description

pict

This block calculates the RMS value of a periodic input signal based on discrete samples. The sample time and the number of samples can be specified. The fundamental frequency f   of the running window is

                  1
f = sample-time-×-number-of samples.

The Discrete RMS Value block is implemented with the Discrete Mean Value block.

Parameters

Initial condition
The initial condition describes the input signal before simulation start. If the input is a scalar signal the parameter can either be a scalar or a column vector. The number of elements in the vector must match the value of the parameter Number of samples - 1. If input and output are vectorized signals a matrix can be used. The number of rows must be 1 or match the number of input signals. The default value of this parameter is 0.
Sample time
The time interval between samples. See also the Discrete-Periodic sample time type in section Sample Times.
Number of samples
The number of samples used to calculate the RMS value.