Case Study Problems in Multivariable Control

Some real multivariable process control problems are presented here. Follow the links to the case study problem of your interest. Each of these problems deals with the control of (typically) a 2x2 MIMO system. Some of the case studies do have more than two outputs, in which case you are required to control two outputs and monitor the performance of the others.

Each project will, in general, involve the following phases : literature review, model development and process identification, control structure selection and controller tuning for SISO systems, multiple SISO loop tuning. Details will be provided by your project 'advisor' at the appropriate time. Some general guidelines are provided below, and deescriptions of the individual projects may be obtained by following the links.

A Simulink file appropriate to your case study will be provided by your project advisor, and will play the role of the 'plant' you want to control. While developing your model for the process, bear in mind that the output of the Simulink file contains the 'true' output of the plant corrupted by (measurement) noise.

Anaerobic Sludge Digesters : Anaerobic sludge digesters are used to degrade compounds (in waste waters high in suspended solids) to carbon dioxide and water.

Drug Infusion System : This deals with the administration of drugs to a patient undergoing surgery or some sort of trauma (e.g., a heart attack)

Fluidized Catalytic Cracking Unit : A fluidized catalytic cracking unit (FCCU) is used to produce the majority of gasoline in an oil refinery.

Reactive Ion Etcher : Plasma etching (or reactive ion etching) is an important process in the semiconductor device manufacturing.

Rotary Lime Kiln Temperature Control : Lime kilns are used in the paper (and other) industries to convert lime mud to lime.