Accession Number : AD1042296


Title :   Predictive Flow Control to Minimize Convective Time Delays


Descriptive Note : Conference Paper


Corporate Author : USAF Academy USAF Academy United States


Personal Author(s) : Fagley,Casey ; Porter,Chris ; McLaughlin,Thomas


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1042296.pdf


Report Date : 19 Aug 2013


Pagination or Media Count : 11


Abstract : To overcome the convective time delay issue for active closed-loop flow control, a model based predictive control algorithm is analyzed. From a controls perspective, forms of internal model control or model predictive control can be used to accommodate and minimize the effect of systems with pure time delays. Moreover, the Smith predictor is a commonly employed control technique to negate the pure time delay in a closed-loop system.This form of model predictive control is applied to the asymmetric vortex problem of an axisymmetric forebody (specifically a von Karman ogive with fineness ratio of 3.5) at high angle of attack (a = 50). Full order Navier Stokes are numerically solved and provide the plant process.


Descriptors :   flow fields , fluid dynamics , fluid flow , closed loop systems , delay , navier stokes equations , control systems


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE