CAJ | 학술논문

　　航天技术中很重要的一项课题就是大型化高精度星载天线结构的研究开发，而大型柔性环形天线则是当前星载天线结构研究中的一个重点研究对象，它具有尺寸大、柔性大、刚度低、重量轻、阻尼弱、固有频率低等特点。随着天线口径的增大，其低阶频率会进入星体调姿频段，这将会导致星体调姿过程中发生低频、大幅度、长时间的星线耦合振动，影响天线的精度和卫星星体的调姿过程。所以必须对星线耦合振动响应的抑制问题进行研究。传统的增强刚度的设计对于星线耦合振动响应的抑制已不能满足要求，传统的振动被动控制方式也因为控制能力的限制而难以胜任。本文以某星载大型柔性环形天线的振动主动控制为背景，将一种新型压电作动器应用于柔性环形天线结构的振动主动控制，并对此进行了探讨和试验验证。
　　항천기술중흔중요적일항과제취시대형화고정도성재천선결구적연구개발，이대형유성배형천선칙시당전성재천선결구연구중적일개중점연구대상，타구유척촌대、유성대、강도저、중량경、조니약、고유빈솔저등특점。수착천선구경적증대，기저계빈솔회진입성체조자빈단，저장회도치성체조자과정중발생저빈、대폭도、장시간적성선우합진동，영향천선적정도화위성성체적조자과정。소이필수대성선우합진동향응적억제문제진행연구。전통적증강강도적설계대우성선우합진동향응적억제이불능만족요구，전통적진동피동공제방식야인위공제능력적한제이난이성임。본문이모성재대형유성배형천선적진동주동공제위배경，장일충신형압전작동기응용우유성배형천선결구적진동주동공제，병대차진행료탐토화시험험증。
One of the important space technology researches is the study of large-diameter high-precision satellite antenna structure, and the large loop satellite antenna is one of the key studies of the large-diameter high-precision satellite antenna structure. The large loop satellite antenna has the characteristics of large-size, big-flexible, low-stiffness, light-weight, weak-damping and low-natural frequency. With the increasing of antenna diameter, the low-order frequency of the large loop satellite antenna will located in the frequency range of satellite attitude adjustment, then the low-frequency, large-amplitude and long-time coupled vibration will be occurred during the adjustment process, it will affect the accuracy of the antenna and the process of orbital transfer. So we have to study the method to suppress the coupling vibration happening during the satellite attitude adjustment. Because of the limitation of spacecraft launch load, traditional methods such as design of enhancing the stiffness of satellite and antenna can’t meet the requirements. The control capacity of traditional passive vibration control can’t meet the requirements, either. On the background mentioned above, this paper studied active control of vibration of flexible loop antenna structure using a new PZT actuators, and performed further discussions and experiment study for them.