Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New methodology to design complete mould QFT multivariable controllers

25.10.2002


This project has been proposed in the doctoral thesis of professor Igor Egaña Santamarina of the Public University of Navarre, called “Design of complete mould QFT multivariable controllers”. Professor Mario Garcia Sanz, from the Department of Automation and Computer Science of the Public University of Navarre, has supervised the project.

Air traffic controllers and wind generator controllers

Control engineering involves the design of mathematical laws that modify the way in which industrial processes progress. That way, for example, when the way in which warming power affects the temperature of the oven is established, it is possible to determine how power must be modified so that opening and closing of the door produces a minimum effect in the inner temperature. But control engineering is present in many other industrial processes. For example, when the ABS reduces the braking of a car to avoid the blocking of wheels, or in case of an electronic circuit that tunes the exact frequency of a digital radio.



The doctoral thesis is set within the Quantitative Feedback Theory (QFT), whose development started at the end of the 50s under the supervision of professor Horowitz. Since then, some of the technical applications based on QFT are air traffic controllers of the most modern airplanes, monitoring systems of high precision satellites, sewage treatment plants or robotic. Similarly, in Navarre, Mario Garcia Sanz –director of this thesis- applies at the present this technology in the design of control systems of a wind generator of 1,5 MW for the company M. Torres Diseños Induatriales S.A.

More efficient way to reduce “coupling”

The doctoral thesis of Igor Egaña has been focused on the study of multivariable systems, that is, with multiple entries that affect multiple outputs. According to professor Egaña, the main characteristic of this kind of processes is that when measuring an error in an output and trying to reduce it acting one of the inputs, causes a failure in various outputs. That is known as the coupling effect between the links. In that sense, the thesis defends a more efficient way to reduce those interactions between links.

As a consequence of the theoretical study, it has been analysed the inclusion of some elements of the controller that usually are not considered in multivariable processes: the elements located outside the main diagonal of the controller.

To verify the validity of those theoretical results, the methodology has been applied in two different processes. On the one side, the introduction of a controller in an industrial robot of the type SCARA has proved the viability of the technical proposal. On the other side, the design of the control algorithm for the heat exchanger of a milk pasteurisation plant, which according to professor Egaña is a process with more complex characteristics from the control point of view, has strengthened the applicability of the new contribution made by this doctoral thesis.

Garazi Andonegi | alfa
Further information:
http://www.basqueresearch.com/index.asp?Gelaxka=1&hizk=I

More articles from Process Engineering:

nachricht Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht A laser for divers
03.05.2017 | Laser Zentrum Hannover e.V.

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: 3-D scanning with water

3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects

A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

Ultrathin device harvests electricity from human motion

24.07.2017 | Power and Electrical Engineering

Scientists announce the quest for high-index materials

24.07.2017 | Materials Sciences

ADIR Project: Lasers Recover Valuable Materials

24.07.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>