نتایج جستجو برای: magnetic levitation
تعداد نتایج: 339513 فیلتر نتایج به سال:
The introduction of centrifugal pumps as artificial heart devices has spawned a number of interesting controls problems including magnetic levitation and motoring of a thin, gyroscopic impeller subject to significant but poorly characterized fluid couplings; parameter estimation based observation of magnetic circuits to determine impeller position; and potentially complex coordination of impell...
We report diamagnetic levitation of droplets and/or particles of pico–femtoliter volume and demonstrate their on-chip storage and high precision manipulation (translation, merging, assembling and rotation). We also demonstrate a levitation based microfluidic processor to process droplets/particles with up to a billion times smaller volume than in typical microfluidic devices. The levitated part...
The LevitronTM is an axisymmetric top magnetized parallel to its symmetry axis. It can levitate above a specially constructed magnetic base if spun rapidly enough (and, as we found, not too rapidly). We have written a complete, coupled, nondissipative Hamiltonian system that describes the dynamics of the top. The system is twelfth order and is too complicated for general analysis. We have integ...
Paramagnetic ionic liquids (PILs) provide new capabilities to measurements of density using magnetic levitation (MagLev). In a typical measurement, a diamagnetic object of unknown density is placed in a container containing a PIL. The container is placed between two magnets (typically NdFeB, oriented with like poles facing). The density of the diamagnetic object can be determined by measuring i...
The working principle of the motor can cause unbalanced magnetic pull (UMP) between stator and rotor unavoidably. Previous research about nonlinear vibration excited by UMP was focused on supported traditional mechanical bearings or gas bearings. However, levitation is particular due to low rigidity provided active bearing (AMB). amplifies in resonant zone further excites electromagnetic force,...
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