Improved Local Rational Method by incorporating system knowledge: with application to mechanical and thermal dynamical systems. Issue 15 (2018)

• Record Type: Journal Article
• Authors: Evers, Enzo; de Jager, Bram; Oomen, Tom
• Is Part Of: IFAC-PapersOnLine. Volume 51:Issue 15(2018)
• Page Start: 808
• Page End: 813
• Publication Date: 2018
• Subjects: Frequency Response Function -- Local Polynomial Method -- Orthonormal Basis Functions -- Transient Reduction; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2018.09.127
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: A key step in experimental modeling of mechatronic systems is Frequency Response Function (FRF) identification. Applying these techniques to systems where measurement time is limited leads to a situation where the accuracy is deteriorated by transient dynamics. The aim of this paper is to develop a local parametric modeling technique that improves the identification accuracy of a range of systems by exploiting prior knowledge. The method is to impose a prior on the approximate locations of the system poles. This leads to better fit results and enables an accurate variance characterization. As a special case, traditional LPM is recovered.