CAJ | 학술논문

变频吸振器可以有效减少航天器转动部件对航天器主结构的扰动，但机械式变频器的体积和质量较大，难以应用于航天领域。通过将电磁技术应用于变频吸振器中，提出一种基于电磁变频原理的吸振器，并建立其数学模型，对其性能进行分析和仿真。在理论和有限元计算的基础上，制作原理样机，测试其变频性能。实验表明，应用于吸振器上的电磁变频装置可以提供4000 N/m的刚度变化范围，对应的最大吸振频率可达45 Hz，能在较宽的频带范围内有效降低主结构的振动响应，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。
변빈흡진기가이유효감소항천기전동부건대항천기주결구적우동，단궤계식변빈기적체적화질량교대，난이응용우항천영역。통과장전자기술응용우변빈흡진기중，제출일충기우전자변빈원리적흡진기，병건립기수학모형，대기성능진행분석화방진。재이론화유한원계산적기출상，제작원리양궤，측시기변빈성능。실험표명，응용우흡진기상적전자변빈장치가이제공4000 N/m적강도변화범위，대응적최대흡진빈솔가체45 Hz，능재교관적빈대범위내유효강저주결구적진동향응，동시기조절속도화정도야능만족항천기대변빈흡진기상관성능적요구。
Adaptive dynamic vibration absorbers (ADVA) have been proved effective to reduce the vibration response of the main structure to the rotating parts of spacecraft. However, mechanical ADVA is too large and heavy to be attached to satellites. In this article, a type of electromagnetic ADVA was introduced and its mathematic model was built. Also, its performance was analyzed and simulated. Based on the theoretical analysis and finite element computation, the prototype of the electromagnetic ADVA was prepared, and its frequency changing ability was tested. The experimental result shows that the prototype can provide up to 4 000 N/m stiffness changing, the corresponding maximum vibration absorbing frequency can reach 45 Hz. It is also shown that the ADVA is able to reduce the vibration of the main structure and the adjusting speed and accuracy can meet the requirement of spacecraft application.