CONTROLLER-DESIGN FOR NONLINEAR-SYSTEMS VIA DIFFERENT TRANSFORMATIONS

Authors
Citation
Ct. Liou et Th. Hsiue, CONTROLLER-DESIGN FOR NONLINEAR-SYSTEMS VIA DIFFERENT TRANSFORMATIONS, Journal of the Chinese Institute of Chemical Engineers, 26(4), 1995, pp. 203-212
Citations number
19
Categorie Soggetti
Engineering, Chemical
ISSN journal
03681653
Volume
26
Issue
4
Year of publication
1995
Pages
203 - 212
Database
ISI
SICI code
0368-1653(1995)26:4<203:CFNVDT>2.0.ZU;2-N
Abstract
The designs of the level control in process flow systems with the type s of cylindrical, conical and hemispherical configurations are studied . All of the systems are non-linear and can be transformed to the line ar systems. However, we find that the transformation is not unique and that the non-linear output signal is also different depending on the choice of the transformation function. How to find a suitable transfor mation function is now investigated. First, we define the suitable tra nsformation function be integratable, invertable and effective. Then, define a sensitivity function for finding an appropriate form. Finally , by introducing a variable lambda(x) to the transformation function, one degree of freedom is obtained and two classes of suitable forms fo r transformation function are recommended. The simulation results demo nstrate that the same non-linear output responses with a better perfor mance can be obtained by the suitable choice of the transformation fun ction.