CAJ | 학술논문

为了有效抑制航天器转动部件对敏感载荷的扰动，将电磁技术应用于变频吸振器上，从经典电磁理论出发，建立了斥力悬浮型电磁变频装置的数学模型。该型电磁变频装置通过两个电磁铁对中间的永磁体产生排斥作用来产生恢复力：当中间永磁体偏离平衡位置时，由于两边电磁铁斥力的非线性变化使得二者对中间永磁体产生一个指向平衡位置的恢复力。理论分析表明，在气隙不大的情况下，该力与永磁体偏离平衡位置的位移成正比，同时其与电磁铁中通入的电流成正比关系，进一步的仿真也验证了该结论，这为有效、精确控制变频吸振器的工作频率提供了理论依据。根据理论计算和有限元仿真，采用了电磁技术的变频装置可以提供4500 N/m左右的刚度变化范围，应用该变频装置的吸振器可以提供近50 Hz的频率变化范围，同时其调节速度和精度也能满足航天器对变频吸振器相关性能的要求。
위료유효억제항천기전동부건대민감재하적우동，장전자기술응용우변빈흡진기상，종경전전자이론출발，건립료척력현부형전자변빈장치적수학모형。해형전자변빈장치통과량개전자철대중간적영자체산생배척작용래산생회복력：당중간영자체편리평형위치시，유우량변전자철척력적비선성변화사득이자대중간영자체산생일개지향평형위치적회복력。이론분석표명，재기극불대적정황하，해력여영자체편리평형위치적위이성정비，동시기여전자철중통입적전류성정비관계，진일보적방진야험증료해결론，저위유효、정학공제변빈흡진기적공작빈솔제공료이론의거。근거이론계산화유한원방진，채용료전자기술적변빈장치가이제공4500 N/m좌우적강도변화범위，응용해변빈장치적흡진기가이제공근50 Hz적빈솔변화범위，동시기조절속도화정도야능만족항천기대변빈흡진기상관성능적요구。
The rotating parts on the spacecraft can seriously disturb working payload. In order to decrease this effect, electronic magnetic technology was applied to adaptive vibration absorber. This EM frequency control system worked through the repulsions from two electromagnets: when the central magnet left the balance place, repulsions of the electromagnets on both sides of the magnet would change. Because of the nonlinearity of the repulsions, the combining force would point to the balance just like a restoring force. Theoretical analysis showed that if the distance between the two electromagnets was sufficiently small, such restoring force was proportional to the displacement of central magnet from the balance place . Fur-thermore, it was also proportional to the currency in the electromagnet. These conclusions are supported by simulation too. That means it can be taken as the base of an effective, high-accurate DVA control method. According to the theoretical calculation and FEM simulation results, the whole system can change its stiffness in a range of 4 500 N/m. Through choosing right mass ratio, the adaptive vibration absorber could adjust its working frequency in a range of 50 Hz. The performance of the vibration ab-sorber can meet the need of spacecraft.