The issue of formation rearrangement for a troop of cooperative unmanned vertical takeoff and landing (VTOL) aircrafts in an obstacle-loaded atmosphere is figured out using a
purposed backstepping based proportional–integral–derivative controller (PID). The
designed controller is developed to regulate every unmanned quadrotor within the troop in
an exceedingly localized manner guaranteeing the reserving of the required geometric
formation. The backstepping technique could be a promising control technique for nonlinear
and coupled multivariable systems. The essential contribution in this paper concentrates on
resolving the formation issue for a troop of cooperative pilotless VTOL airplanes in a
decentralized manner via backstepping PID regulator. The designed decentralized controller
guarantees the success of the required mission of the swarming troop. The simulation results
declare the successes of the proposed controller in guaranteeing the stability of the system
and reserving of the desired geometric formation either within the existence or absence of
obstacles.
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