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Title: | AUTOMATIC TUNING OF DIRECT DIGITAL CONTROL LOOPS |
Authors: | Tomar, Sumit |
Keywords: | ELECTRICAL ENGINEERING;AUTOMATIC TUNING;DIRECT DIGITAL CONTROL LOOPS;TUNING PROPERTY |
Issue Date: | 1996 |
Abstract: | The concept of tuning in control systems have matured over the last few years from a theoretical subject to one which has become an important tool for industry. The basic idea of tuning property is straight forward. A design procedure for a process with known parameters which fits the particular application is first chosen. When the parameters of the process are not known, they are estimated recursively and the controller parameters are recalculated at each step using the updated estimates. There are many different design methods and many different parameter estimation schemes; consequently there is a large number of combination which possibly possesses the tuning property. Most of them deal with tuning of second order systems only. But large scale systems are essential features of our society. Trying to represent such systems lead to complex and large scale models, thus making it very difficult to analyze, understand and tune them due to large dimensions of model, which requires a large computer storage capacity and considerable simulation time. A software has been developed for the tuning technique of control systems consisting of large number of control loops. For the simulation purpose a higher order plant transfer function is taken. Then for the tuning first of all the order of the plant transfer function is reduced. After reducing the order of plant transfer function, the tuning is performed by "minimum variance control". The "recursive parameter estimation" scheme for estimating the controller parameters has been used. The time responses of original and reduced order model, the outputs of the DDC system for different values of set point and load changes have been studied. The computer programs have been developed using the programming language FORTRAN 77. ( |
URI: | http://hdl.handle.net/123456789/7624 |
Other Identifiers: | M.Tech |
Research Supervisor/ Guide: | Parida, Rajendra |
metadata.dc.type: | M.Tech Dessertation |
Appears in Collections: | MASTERS' THESES (Electrical Engg) |
Files in This Item:
File | Description | Size | Format | |
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EED 247597.pdf | 2.52 MB | Adobe PDF | View/Open |
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