A STOCHASTIC REALISATION ALGORITHM WITH APPLICATION TO MODAL PARAMETER ESTIMATION

✍ Scribed by JOSEPH LARDIÈS

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 293 KB
• Volume: 15
• Category: Article
• ISSN: 0888-3270
• DOI: 10.1006/mssp.2000.1363

✦ Synopsis

This paper presents procedures that allow us to estimate the frequencies and damping coe$cients of a vibrating system in time domain, from multioutput data only. The system is excited by a random force and a stochastic state space model is considered. Two algorithms are used to determine the transition matrix of the system which contains all modal information. The "rst algorithm uses a forward-innovation representation, and the transition matrix is connected to the controllability matrix of the system. The second algorithm uses a backward-innovation representation and the transition matrix is used to the observability matrix of the system. A numerical example is treated and compare these algorithms.