Control of Airflow

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

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