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This paper studies the speed and yaw control problem for an underactuated unmanned surface vehicle (USV) with only two propellers. Firstly, it transforms the dynamical system of speed and yaw into a cascade nonlinear system, and the resulting cascade system can be reduced to the stabilization control problem of a surge speed and yaw subsystem. Secondly, the surge speed and yaw controller are proposed...
This paper considers the path tracking problem for a class of underactuated autonomous underwater vehicles (AUVs), where only surge force and stern plane are available for vehicle's 3DOF diving motion. For these torpedo-type flying vehicles, the pitch moment is proportional to the vehicle's forward speed. Therefore, if vehicle takes slow motion, then we cannot fully excite the vehicle's pitch motion...
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