Flight Control Design Using Mixed H2/Microns Optimization.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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This thesis examines the use of the mixed H2Microns optimal control synthesis method in the design of a flight control system for the lateraldirectional axes of the F-16 Variable Stability In-Flight Simulator Test Aircraft VISTA. The method is designed to minimize the H2 norm two-norm for a given value of microns. This should provide adequate noise and disturbance rejection while maintaining robustness against several types of uncertainties in the system. This thesis finds that, for this problem, the two-norm is not an accurate representation of the outputs of interest. When the two-norm is broken up into its constituent parts an appropriate solution can be found. This thesis also finds that it is possible to use an H2 controller which is destabilizing to the evaluation model as the starting point in the mixed H2IL curve and still get an acceptable answer. A numerical approach was used, utilizing a recently improved computer algorithm.
- Military Aircraft Operations
- Computer Programming and Software