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

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