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The attitude control of a quadrotor is addressed in this paper. Although PID is the most widely used control law in quadrotor control, its limits in accuracy and robustness still restrict the applications of quadrotors. This paper introduces the characteristic model-based all-coefficient adaptive control method into the quadrotors attitude control. Improved tracking performance is validated by comparing...
This paper addresses the fast adaption of the characteristic model-based golden-section adaptive control(CM-GSAC). The CM-GSAC is well-known for its simplicity and guaranteed transient performance, which depend on the projection of the identified parameters onto a bounded convex domain. In order to avoid excessive efforts in calculating those parameter bounds, a second level adaption procedure is...
We built and studied the size scaling effect of perpendicular magnetic tunnel junctions (p-MTJs) with step-etch structure and dual-MgO/CoFeB interfaces. The step-etch structure yields symmetrical R-H loop, while dual-MgO/CoFeB interfaces raises cell anisotropy, thus the data retention time. The p-MTJ of 45-nm diameter shows spin-transfer torque switching voltage Vsw with tight temporal sigma (\(\sigma \) ...
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