Transport delay

A pure time delay.

  • signal
  • Gradara equations
  • 2 ports
  • 1 parameter
BlockTransport delayKinddelayLibraryContinuous

Description

Delays its input by a fixed time T. Use it for transport or communication lag.

Example

Step responses A unit step through a first-order filter, a second-order system, an integrator, and a delay; a ramp through a derivative.

Step at 0.1 sFirst orderSecond orderIntegratorDelay 0.3 sRamp, slope 2Derivative
In Gradara, select a Transport delay block and press F1, then choose Open example. It opens as a new model in My models, ready to run.

Also in this example:Limited integratorStepLow-pass filterRampDerivativeSecond-order

Ports

Inputs 1

  • usignal

    Input signal.

Outputs 1

  • ysignal

    Output signal, u delayed by T.

Parameters

  • DelayT0.05 s

    ≥ 0

    Delay time, in seconds. 0 or more.

Equations

Modelica
y(t) = u(t − T)
For t < T, y = u(0) (the input at the start of the run).

Implementation

The block’s Modelica model
y = delay(u, T);

Assumptions and limitations

  • The delay is fixed during a run.

See also

Select a block in Gradara and press F1 to open its page offline.