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In this work we address the position and attitude control problems for autonomous vehicles in 6 Degrees of Freedom (DOFs), with monodirectional actuators and whose mathematical description includes uncertainties and disturbances. Quaternion-based guidance rules are proposed for attitude and position control at the kinematic level. The actuation system consists of seven monodirectional jets, suitably...
New definitions of approximability are presented for nonlinear second-order sliding mode control systems. Such robustness properties are compared with those already known for first-order methods. Sufficient conditions are obtained for second-order regularization, a sliding error estimate is derived, and some relevant examples are discussed.
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