Friday, 28 August 2009

Wseas Transactions

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Transactions: WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL
Transactions ID Number: 29-665
Full Name: Bohumil Šulc
Position: Professor
Age: ON
Sex: Male
Address: Czech Technical University in Prague, Faculty of Mechanical Engineering, Technická 4, 166 07 Prague 6 - Dejvice
Country: CZECH REPUBLIC
Tel: 224352531
Tel prefix: +420
Fax:
E-mail address: bohumil.sulc@fs.cvut.cz
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Title of the Paper: Some Observations on Development and Testing of a Simple Autotuning Algorithm for PID Controllers
Authors as they appear in the Paper: Bohumil Šulc, Stanislav Vrána
Email addresses of all the authors: bohumil.sulc@fs.cvut.cz, stanislav.vrana@fs.cvut.cz
Number of paper pages: 12
Abstract: Although a wide range of control algorithms are available, PID controllers are still the most widely used type. Even control engineers who have a good knowledge of advanced control algorithms prefer PID controllers when they are asked to design the control circuit for a new device. This is because of their price and because of the simplicity and reliability of the control algorithm. The PID control algorithm enables anyone with a basic knowledge of mathematics to gain some idea of what happens inside the controller during the control process, how the manipulated value is computed and its dependence on the control error. The main disadvantage of standard PID type controllers is the absence of autotuning features. Implementation of such controllers requires time-consuming tuning, and very often the presence of expensive experts. Therefore, there is quite strong pressure to equip new PID controllers with simple autotuners. Recently, tuners based on relay experiments h!
ave become popular. However, the use of autotuners of this kind requires the control process to be stopped temporarily during the relay experiment. For these reasons, even controllers equipped with these autotuning facilities are used without any tuning, sometimes even with the factory presetting. This unsatisfactory situation has motivated us to develop a new frequency response based autotuning algorithm that does not use any model of the controlled plant and enables the controller parameters to be changed without the necessity to break the control process.
Keywords: PID controller, Laboratory model, Tuning, Model-free, Implementation, Optimality, Mathematical model, Autotuning
EXTENSION of the file: .pdf
Special (Invited) Session: Some observations on Teching Practical controller tuning methods in a laboratory set-up
Organizer of the Session: 620-588
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