Unit Delay

Delays the input signal by a sample period

Description

The Unit Delay component is described as follows:

 $y=\frac{u}{z}$

The output signal, $y$, is the input signal, $u$, of the previous sample instant. Before the second sample instant, the output, $y$, is identical to the parameter, ${y}_{0}$.

The Signal Size parameter allows the block to operate on a vector of signals rather than a single signal.

Connections

 Name Description $u$ Continuous input signal connection $y$ Continuous output signal connection

Parameters

 Symbol Default Units Description Modelica ID ${y}_{0}$ $0$ - Initial value of the output signal y_start Sample Period $0.1$ $s$ Sample period of the component samplePeriod ${T}_{0}$ $0$ $s$ First sample time instant startTime Signal Size $1$ - Dimension of input and output signals signalSize