Linear control of 3D disturbances on a flat-plate
2010 (English)In: SEVENTH IUTAM SYMPOSIUM ON LAMINAR-TURBULENT TRANSITION / [ed] Schlatter P; Henningson DS, 2010, Vol. 18, 373-378 p.Conference paper (Refereed)
Using a number of localized sensors and actuators, a feedback controller is designed in order to reduce the growth of three-dimensional disturbances in the hotplate boundary layer. A reduced-order model of the input-output system (composed of the linearized Navier-Stokes equations including inputs and outputs) is computed by projection onto a number of balanced truncation modes. It is shown that a model with 50 deuces of freedom captures the input-output behavior of the high-dimensional (n similar to 10(7)) system. The controller is based on a classical LQG scheme with a row of three sensors in the spanwise direction connected to a row of three actuators further downstream. The controller minimizes the perturbation energy in a spatial region defined by a number of (objective) functions.
Place, publisher, year, edition, pages
2010. Vol. 18, 373-378 p.
, IUTAM Bookseries, 18
IdentifiersURN: urn:nbn:se:kth:diva-29871DOI: 10.1007/978-90-481-3723-7_60ISI: 000277097200060ScopusID: 2-s2.0-79959225838ISBN: 978-90-481-3722-0OAI: oai:DiVA.org:kth-29871DiVA: diva2:399177
7th IUTAM Symposium on Laminar-Turbulent Transition, Royal Inst Technol, Stockholm, SWEDEN, JUN 23-26, 2009
QC 201102212011-02-212011-02-172011-02-21Bibliographically approved