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Stability and performance are two main issues in motion of bipeds. To ensure stability, motion of a biped need to follow specific pattern to comply with certain stability criterion such as zero moment point. However, there are infinity many patterns of motion, i.e. different paths, which may ensure stability, so one might think of achieving better performance by choosing proper parameters of motion...
This paper is focused on the motion control problem for a laparoscopic surgery robot assistant with an actuated wrist. These assistants may apply non-desired efforts to the patient abdomen. Therefore, this article proposes a control methodology based on three feedback levels, which have been defined as layers. These layers control different aspects of the endoscope movement. A low level assures the...
This paper deals with the robust stabilization and trajectory-tracking problems of a riderless bicycle. A dynamic model, which takes into account geometric-stabilization mechanisms due to bicycle trail, is presented. A posture controller which combines second-order sliding-mode control and disturbance observer is derived. Then, an innovative tracking controller based on the proposed posture controller...
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