Teaching process control in instrumentation and control laboratory
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The Instrumentation and Control Laboratory (IC-lab) was designed to provide separated modules of different types of heat exchangers, air- pressured vessels, water tanks, pumps, flow meters and control valves. These module s can be connected to provide various conventional pieces of process control equipment. Through the experiments designed for the IC-lab, students can obtain real hands-on experience. In the first two years of the IC course students learn to perform step-tests, develop linear and non-linear model, then design and implement P, PI and PID cont rollers in the real time systems. More sophisticated control schemes such as Cascade, Feedforward, Generic Model Control (GMC) or Fuzzy Logic Control can also be achieved in the lab. This paper demonstrated an example of generating a nonlinear system by connecting two pressured- air tanks and other modules. A step test is perform ed to determine an approximate model for the PI controller design. At the same time a mathematical model of the system is developed based on measurements and calibrations of the system. A GMC scheme is applied based on this model. Comparison of performances of the PI and GMC controllers to control the pressure in the vessel are finally presented and discussed.
|Publication Type:||Conference Paper|
|Murdoch Affiliation:||School of Engineering and Energy|
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