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Pt/Co/heavy metal (HM) tri-layered structures with interfacial perpendicular magnetic anisotropy (PMA) are currently under intensive research for several emerging spintronic effects, such as spin-orbit torque (SOT) [1, 2], domain wall motion [3, 4] and room temperature skyrmions [5, 6].
A simple eigenvalue representation result that justifies the celebrated phase compensation principle, from algebraic point of view, is presented. The result generalizes phase compensation principle, it appears as a stability criterion, applicable to multi-machine systems. It allows us to find compensation angle for machines individually. Furthermore, the problem of gain coordination is also reduced...
Theoretical model of symmetrical constrained damping structure for railway wheel is established based on complex stiffness method. Four parameters are related to the noise-restraint performance of wheel with damping treatment, which are the thickness of constrained layer, the thickness of damping layer, the loss factor and the complex shear module of damping material. Optimal calculation in the frequency...
This paper studies the stability of the central difference method (CDM) for real-time substructure test considering the mass of specimen (i.e., experimental substructure). To obtain correct reaction inertia force, an explicit acceleration formulation is assumed for the CDM. The analytical work shows that the stability of the algorithm decreases with increasing specimen mass if the experimental substructure...
The authors extend energy-balancing-based control for set-point regulation to the problem of trajectory tracking for Euler-Lagrange (EL) systems. In addition to producing a new tracking control, this method also provides a re-interpretation of established results, such as computed torque control, PD+ control and Slotine-Li control. The authors also consider port-controlled Hamiltonian (PCH) systems,...
Power system stabilizer (PSS) is one the most economical and effective controllers to enhance the power system damping. Under multioperating conditions, the probabilistic PSS (PPSS) design problem can be formulated as a parameter optimization problem with probabilistic eigenanalysis included and the statistical nature of the eigenvalues is described by their expectations and variances. This paper...
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