15th Triennial World Congress of the International Federation of Automatic Control
  Barcelona, 21–26 July 2002 
ACTIVE SUPERSONIC FLOW CONTROL USING HYSTERESIS COMPENSATION AND ERROR GOVERNOR
Marina Tharayil, Andrew Alleyne
University of Illinois at Urbana-Champaign
Department of Mechanical and Industrial Engineering
1206 West Green Street
(217) 244-6534 (fax), alleyne@uiuc.edu

This paper introduces a novel concept termed Smart Mesoflaps for Aeroelastic Recirculation Transpiration SMART for controlling shock boundary layer interactions SBLI in supersonic jet inlets. The control strategy for a subsystem of the SMART project, subject to hysteresis and actuator saturation, is presented. A Hysteresis Compensation scheme, as well as results from experimental application of HC to the SMART subsystem are presented next. A generalized Error Governor EG for PID controllers to compensate for actuator saturations is developed. Finally, the PID with HC and modified EG applied to a benchtop system is shown to be successful at preventing excessive control efforts.
Keywords: Actuators, Control design, Saturation, PID controllers, Error analysis, Error control, Aerospace control, Flow control, Hysteresis.
Session slot T-Tu-A06: Space Craft and Missile Control/Area code 8a : Aerospace