SPACE ANTENNA STRUCTURE VIBRATION SUPPRESSION VIA A NOVEL ELECTROMAGNETIC SHUNT DAMPING METHOD

摘要

In this work, a kind of the negative resistance electromagnetic shunt damping is proposed to reduce the vibration of the antenna structure. In detail, the negative resistance can cancel the inherent resistance of the coils, so that the total impedance of the circuit can be decreased which improves the vibration control effectiveness. First of all, a kind of the electromagnetic transducer is built up, the schematic of the negative resistance shunt controller is developed and the corresponding vibration control principle of the shunt is illustrated theoretically. Secondly, the theoretical model of the coupled antenna system is established by using finite element method. The simulation is carried out, and the result show the proposed method can control the vibration of the antenna. Finally, the ground experimental system of the antenna structure is setup. The responses of the antenna are tested. The results demonstrates that the proposed vibration control method can tremendously isolate the vibration of the space antenna. The electromagnetic shunt damping method does not need any other sensoring and feedback system compared to the active one. Thus,it has great application potentials in space engineering.