14th IFAC Symposium on System Identification, SYSID 2006

SYSID-2006 Paper Abstract


Paper WeA6.4

Smogeli, Oyvind Notland (Norwegian Univ. of Science and Tech.), Soerensen, Asgeir (Norwegian Univ. of Science and Tech.)

Adaptive Observer Design for a Marine Propeller

Scheduled for presentation during the Invited Session "Essential Aspects of Marine Systems Dynamics Identification" (WeA6), Wednesday, March 29, 2006, 11:30−11:50, Newcastle Room

14th IFAC Symposium on System Identification, March 29 - 31, 2006, Newcastle, Australia

This information is tentative and subject to change. Compiled on July 17, 2018

Keywords Mechanical and Aerospace, Nonlinear System Identification, Identification for Control


Recently, new control designs and performance monitoring schemes for electrically driven marine propellers have been developed. The new control designs have been shown to increase the thrust capability, reduce mechanical wear and tear, and limit power transients. To achieve optimum performance, these designs rely on knowledge of the friction in the propeller drive system. Since this information not necessarily is available, a nonlinear adaptive observer for estimating the propeller load torque and the coefficient of friction is developed. Experiments are provided to verify the observer performance.