Viscous Drag Reduction Based On Size Effect For Micro-gyroscope

Micro gyroscope has an important role in today’s society more and more important,its development by leaps and bounds, but there are some problems. Among them, due tothe use of magnetic suspension rotor micro gyroscope eddy current effect, the heat willbe low lateral stiffness of the rotor also limits its speed increase; And electrostaticsuspended gyro although accuracy is very high, but processing cost is high, the highelectrostatic voltage required support shortcomings. Aiming at the shortcomings anddisadvantages, this article mainly from the breakthrough on the rotor structure, so as torealize relatively simple structure, high speed, high precision of the new type ofgyroscope.Based on the related basic principle of liquid floated gyro proposed new ball discrotor with the interface size effect, using softwares such as Ansys Workbench and Fluentbased on rotor model, finite element analysis and the friction between the rotor andstator, size optimization.First of all, use Workbench for system modeling, the preliminary design size,examining interference and other issues.Second, using Ansys finite element analysis was carried out on the rotor itself,applying the boundary conditions, respectively to the rotor by stress, producing strain,and its modal analysis. Investigation into the feasibility of this structure, prove itsadvantages.Then, use Workbench to design various graphic elements added to the rotor surface,examine the relationship between specific graphic elements and the surface slip length.Surface slip length will be set in gyroscope model, examine the influence of theinterface friction size effect on the high-speed rotation of the rotor.Finally, according to the above results, this work leads to the optimization of thedesign of the rotor size and morphology with micro-nano dual structure, to producehigh-speed, high-precision liquid floating rotor micro-gyroscopes.