Identifiability of physical parameters in systems with limited sensors
2014 (English)In: Proceedings of the 19th IFAC World Congress, 2014, 6454-6459 p.Conference paper (Refereed)
In this paper, a method for estimating physical parameters using limited sensors is investigated. As a case study, measurements from an IMU are used for estimating the change in mass and the change in center of mass of a ship. The roll motion is studied and an instrumental variable method estimating the parameters of a transfer function from the tangential acceleration to the angular velocity is presented. It is shown that only a subset of the unknown parameters are identifiable simultaneously. A multi-stage identification approach is presented as a remedy for this. A limited simulation study is also presented to show the properties of the estimator. This shows that the method is indeed promising but that more work is needed to reduce the variance of the estimator.
Place, publisher, year, edition, pages
2014. 6454-6459 p.
, IFAC-PapersOnLine, ISSN 2405-8963 ; 47(3)
IdentifiersURN: urn:nbn:se:liu:diva-111052DOI: 10.3182/20140824-6-ZA-1003.02272OAI: oai:DiVA.org:liu-111052DiVA: diva2:752850
19th IFAC World Congress, South Africa, Cape Town, August 2014.