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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (9): 2874-2883.doi: 10.7527/S1000-6893.2015.0307

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Optimal design of rotary table for spherical rotor of magnetically suspending gambling flywheel

WANG Weijie1, REN Yuan1, LIU Qiang2, FAN Yahong3   

  1. 1. Department of Space Equipment, Equipment Academy, Beijing 101416, China;
    2. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
    3. Beijing Institute of Control Engineering, Beijing 100190, China
  • Received:2015-09-25 Revised:2015-11-01 Online:2016-09-15 Published:2015-11-25
  • Supported by:

    National Natural Science Foundation of China (51475472)

Abstract:

In order to achieve magnetic circuit decoupling of magnetically suspending flywheel (MSFW), and to eliminate the magnetic bearing interference, one spherical rotor of the magnetically suspending gambling flywheel(MSGFW) is proposed. Magnetic bearings with both axial and radial spherical magnetic resistance types are used to control the rotor's 3 translational degrees of freedom (DOFs); combining with the Lorentz force magnetic bearing, we achieve the rotor's 5 DOFs active control and all channel magnetic circuit decoupling so that the rotor's universal deflection is precisely controlled. The project support is provided to improve the MSFW attitude control moment bandwidth and attitude sensitive precision. Based on the structure of spherical rotor, taking the mass of rotary table as the optimization objective, considering the constraint conditions including the first order resonance frequency, maximum equivalent stress, rigid body displacement, polar inertial moment, ratio of inertial moment, and distance between centroid and geometric center, using the software of multidisciplinary optimization iSIGHT to integrate the software of finite element analysis ANSYS, we optimally design the rotary table of spherical rotor by NLPQL algorithm. The results indicate that the mass of rotary table reduces by 2.98 %, the distance between centroid and geometric center is lowered by 1 order of magnitude, only 12 μm, and the rigid body displacement of rotor at high rotation speed is 13.65 μm. The stability and reliability of spherical rotor in operation are guaranteed effectively.

Key words: magnetically suspending gambling flywheel, spherical rotor, universal deflection, rotary table, optimal design, finite element

CLC Number: