UAV Lateral Path Following: Nonlinear Sliding Manifold for Limited Actuation
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摘要
The lateral guidance objective is to derive the cross track error towards zero with graceful and stable maneuvers and then to keep it as minimum as possible. A nonlinear sliding surface based lateral guidance scheme is proposed here for Unmanned Aerial Vehicles(UAVs) application with limited actuation. Following the inner(control) and outer(guidance)loop structure, the proposed guidance scheme resides in outer loop and generates reference bank angle commands for the inner control loop. The proposed 1~(st) order SMC algorithm based on nonlinear sliding surface is derived using the kinematic equations for bank-to-turn vehicles. Mathematical proof of existence of sliding mode and actuation boundedness of the closed-loop is also provided. The proposed guidance and control system performance is verified via simulation results for different scenario. A high fidelity nonlinear 6-degrees-offreedom(6-dof) scaled Yak-54 UAV mathematical model is used for flight simulations. Simulation results validated the effectiveness and performance of the proposed lateral guidance scheme.
The lateral guidance objective is to derive the cross track error towards zero with graceful and stable maneuvers and then to keep it as minimum as possible. A nonlinear sliding surface based lateral guidance scheme is proposed here for Unmanned Aerial Vehicles(UAVs) application with limited actuation. Following the inner(control) and outer(guidance)loop structure, the proposed guidance scheme resides in outer loop and generates reference bank angle commands for the inner control loop. The proposed 1~(st) order SMC algorithm based on nonlinear sliding surface is derived using the kinematic equations for bank-to-turn vehicles. Mathematical proof of existence of sliding mode and actuation boundedness of the closed-loop is also provided. The proposed guidance and control system performance is verified via simulation results for different scenario. A high fidelity nonlinear 6-degrees-offreedom(6-dof) scaled Yak-54 UAV mathematical model is used for flight simulations. Simulation results validated the effectiveness and performance of the proposed lateral guidance scheme.
引文
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