We consider a family of damped quasi-Newton methods for solving unconstrained optimization problems. This family resembles that of Broyden with line searches, except that the change in gradients is replaced by a certain hybrid vector before updating the current Hessian approximation. This damped technique modifies the Hessian approximations so that they are maintained sufficiently positive defi...

The underactuated quadrotor unmanned aerial vehicle (UAV) is one of the nonlinear systems that have few actuators as compared to degree freedom (DOF); thus, it a strenuous task stabilize its attitude and positions. Moreover, an induction unmodelled dynamic factors uncertainties make more difficult control maneuverability. In this paper, model-free based single-dimension fuzzy sliding mode (MFSD...