Time Delay

Snapshot of the front panel of the simulator:

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• Tips for using the simulator.
• The simulator: timedelay.exe . The simulator runs immediately after the download by clicking Open in the download window. Alternatively, you can first save a copy of the exe-file on any directory (folder) on your PC and then run the exe-file, which starts the simulator.

Description of the simulated system

The simulator simulates a pure time delay between the input signal u and the output signal y:

y(t)=u(t-T_d)

The time delay T_d can be adjusted while the simulator runs.

Aims

The main aim is to develop an understanding of how a time delay works in the time domain.

Motivation

The time delay is an important phenomenon in practical systems. It appears in transportation of material and signals. A time delay can be used to represent imperfect blending in tanks. In feedback control systems time delays are important identify since any increase of the time delay will decrease the stability of the control loop.

Task

1. Adjust the input signal in any way, and observe how the response in the output signal depends on the time delay.

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Updated 14. January 2008. Developed by Finn Haugen. E-mail: finn@techteach.no.