Posture nonlinear self-adaptive control method for small unmanned helicopter
An unmanned helicopter, adaptive control technology, applied in the direction of attitude control, etc., can solve the problems that the independence of the estimator cannot be guaranteed, and the convergence rate of the parameter estimation error cannot be adjusted.
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[0057] The technical scheme adopted in the present invention is: in the situation that the small unmanned helicopter has parameter uncertainty, the immersion-invariant set method is used in the attitude system control of the small unmanned helicopter, comprising the following steps:
[0058] 1) Determine the coordinate system definition of the small unmanned helicopter;
[0059] The definition of the small unmanned helicopter coordinate system mainly involves three coordinate systems, the inertial coordinate system {I}={O I ,x I ,y I ,z I}, current body coordinates {B}={O B ,x B ,y B ,z B} and target body coordinate system where O i (i=I,B,B d ) represents the origin of the coordinate system, x i ,y i ,z i (i=I,B,B d ) respectively correspond to the unit vectors in the directions of the three principal axes of the coordinate system, and the definition of each coordinate system follows the right-hand rule. The rotation matrix from the current body coordinate syst...
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