Preliminary Air Bleed Heat Exchanger Control Design Study With Adaptive Controller Steve Rogers 5 May 2011
Table of Contents Preliminary Air Bleed Heat Exchanger Control Design Study With Adaptive Controller..............................1 Table of Contents........................................................................................................................................1 Introduction.............................................................................................................................................1 Operating Conditions...............................................................................................................................2 Model Linearization.................................................................................................................................2 Simulink Dynamic Model.........................................................................................................................3 Pole Placement Method..........................................................................................................................4 LQR Method...........................................................................................................................................11 Optimization Using LQR.........................................................................................................................15 L1 Adaptive Control Algorithm..............................................................................................................16 Conclusions............................................................................................................................................17 Appendix................................................................................................................................................18 Appendix – operating condition 1..........................................................................................................18 Appendix – operating condition 2..........................................................................................................19 Appendix – operating condition 3..........................................................................................................21 ...............................................................................................................................................................21 Appendix – operating condition 4..........................................................................................................22 ...............................................................................................................................................................22 Appendix – Operating Condition 5.........................................................................................................23 Appendix – L1 Performance Comparison with LQR...............................................................................24
Introduction Air bleed control systems for jet engines involve pressure, flow, and temperature regulation. Heat exchangers, control valves, and sensor suites are components of the system to be regulated. Ordinarily a cascade control system is used, with flow/pressure on the inner loop and temperature on the outer 1