RECONFIGURABLE FLIGHT CONTROL ON SLIDING MODES ADDRESSING ACTUATOR DEFLECTION AND DEFLECTION RATE SATURATION

An aircraft flight control problem is addressed via multiple time scale sliding mode controller. Limitations to actuator's deflection and deflection rate are addressed via sliding mode controller reconfiguration. The designed re-configurable sliding mode controller achieves a robust, high accuracy tracking performance to mission angles in an outer loop before and after damage to an aircraft. Angular rate commands are robustly tracked in an inner loop. The developed re-configurable control strategy is based on a continuous sliding mode controller with a boundary layer re-configuration (direct adaptation). On-line explicit system (damage) identification is not required. A re-configurabl e sliding mode controller is designed for an F-16 jet fighter with a nonlinear flight dynamics model. Computer simulations demonstrate high accuracy tracking performance. Actuator's deflection and deflection rate do not saturate.

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