Grey box identification for the free electron laser FLASH exploiting symmetries of the RF-system

Journal
IFAC Proceedings Volumes  
Volume
44
Issue
1
Start Page
10770
End Page
10775
Citation
IFAC Proceedings Volumes (IFAC-PapersOnline) 44 (1): 10770-10775 (2011)
Contribution to Conference
18th World congress. International Federation of Automatic Control (IFAC), 2011  
Publisher DOI
10.3182/20110828-6-IT-1002.02558
Scopus ID
2-s2.0-84866774794
ISBN of container
978-3-902661-93-7
Appropriate models are essential to achieve high performance control for particle accelerators, which are the basis for free electron lasers. This papers deals with a significant reduction of the model complexity by exploiting physical symmetries of the plant. It is shown how models obeying the inherent SO(2) symmetry of the cavities and the radio frequency subsystem are set up and their parameters are identified from data generated at the FLASH facility. Validation of the symmetric models gives results which are competitive to those of black box models but with a reduced number of parameters. © 2011 IFAC.
Subjects
Free electron lasers
Grey-box parameter identification
Symmetries
DDC Class
600: Technik
620: Ingenieurwissenschaften