Control of Airflow

E6.3.1.3

System

The experiments are set up with experiment plates in profile frames. The controlled system or control circuit are activated with the Profi-CASSY and the relevant measurement values recorded.

Educational objectives

Get familiar with the basic principles of controllers
Setpoint and disturbance control
Handle analysis and simulation software

Function
The airflow system is comprised of a sensor for measuring the flow and a controllable wind generator. The wind generator is directly activated, with a PID controller for example. An external power amplifier is not necessary for this. The airflow in the measuring tube is measured with a vane wheel anemometer. The cap on the air tube acts upon the controlled system as an external disturbance variable.

Method
The equipment is ideal for demonstration and students' experiments. The tests were carried out with an electronic manual and the data files for CASSY Lab 2 and WinFACT. It is true Plug & Play: The measurement starts automatically after loading the data file.

Target groups
Students completing vocational training in electrical engineering the industry and students of automation engineering and mechatronics are the target group. The course offers introductory experiments that are very simple and also addresses difficult topics for bachelor-level studies.

Topics

Measuring airflow
Step responses of the controlled system
Evaluation of the step response with adjusting function
Determination of the system parameters of a PT2 component
Computer-based system identification
Empirical optimisation for the airflow system
Two-point controlling of the airflow system
ZN optimisation for the airflow system
ZN optimisation for the airflow system with PT2 prefilter
CHR optimisation for the airflow system with PT2 prefilter
Airflow controlling with software controller
Controlling the airflow - simulation

Similar figure

1	734 02 8	Reference variable generator
1	734 011 4	Two position controller
1	734 064N 8	PID digital controller net
1	734 091	Digital Controlled System
1	666 630 8	Blower
1	666 632	Windmill type anemometer
1	524 016S2 8	Profi-CASSY Starter 2
1	726 09 4	Panel frame T130, two-level
1	726 86 4	Stabilised power supply unit ±15 V / 3 A
1	500 59 8	Safety bridging plugs, black, set of 10
1	500 592 8	Safety bridging plugs with tap, black, set of 10
3	500 641 8	Safety experiment cable, 100 cm, red
3	500 642 4	Safety experiment cable, 100 cm, blue
2	500 644 8	Safety experiment cable, 100 cm, black
1	775 682DE 4	LIT-print: Control of airflow, German
1	775 682EN 4	LIT-print: Control of airflow
1	734 501 4	WINFACT LD Starter (one computer)
1	726 10 4	* Panel frame T150, two-level
1	734 502 4	* WINFACT LD Starter (site license)
1	734 504	* WINFACT LD Edition (one computer)
1	734 505 4	* WINFACT LD Edition (Site Licence)
1		additionally required: 1 PC with Windows 7 / 8.1 / 10 (x86 or x64)

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

Control of Airflow

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