Attitude controller for quadrotor unmanned aerial vehicle with dynamic characteristics being unknown and method
A dynamic characteristic, quad-rotor aircraft technology, applied in attitude control, non-electric variable control, control/regulation system, etc., can solve the problem of being susceptible to aerodynamic disturbance parameter perturbation, model parameters cannot be accurately measured, and the quality of quad-rotor UAV. , small moment of inertia, etc.
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[0079] Below in conjunction with accompanying drawing and example the present invention will be further described:
[0080] The quadrotor UAV is a typical nonlinear system, with six degrees of freedom, that is, displacement in three directions and rotation around the three axes of the coordinate system, while the aircraft only has four independent inputs, that is, the output generated by the four propellers. lift. The dynamic model of the quadrotor UAV is established under the geographic coordinate system {E} and the body coordinate system {B}.
[0081] In order to simplify the motion model of the quadrotor aircraft and ignore the elastic deformation during flight, the following assumptions are made:
[0082] 1) The aircraft is rigid and symmetrical;
[0083] 2) The ground coordinate system is an inertial coordinate system, and the acceleration of gravity does not change with the change of flight altitude;
[0084] 3) Neglecting the influence of the earth's rotation and rev...
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