摘要
磁悬浮飞轮(magnetic suspension flywheel,MSF)具有摩擦更低、超高转速等诸多优势,是高精度航天器理想的姿态控制执行机构。MSF的磁轴承力主动可调,与惯性作动器的工作原理极为相似。基于该原理,创新性地提出采用MSF作为主动作动器,对航天器结构微振动进行抑制。首先,选取MSF及其安装的航天器舱板结构作为研究对象,分析两者之间的相互作用及运动学关系,建立了MSF与舱板结构的耦合动力学与控制模型;然后,利用该模型分别对系统的稳定性、动力学特性进行了数值仿真,并通过振动能量流动特性对比分析了主动抑振前后的振动传递规律。结果表明,MSF不仅可以降低航天器舱板结构的整体微振动传递,还可以消减舱板上指定位置处的微振动响应,在100 Hz以内的消振效果尤为明显。研究结果验证了采用MSF进行结构主动振动抑制的可行性,为MSF在航天器上进行姿控、储能、抑振等多功能一体化应用提供了技术支撑。
Magnetic suspension flywheel(MSF)offers numerous advantages,such as lower friction and ultra-high rotational speeds,making it ideal attitude control actuators for high-precision spacecraft.The magnetic bearing forces of a MSF are actively adjustable,which is similar in principle to the operation of inertial actuators.Based on this principle,this study proposes using an MSF as an active actuator to suppress micro-vibrations of spacecraft structures.First,the MSF and the spacecraft panel structure where it was installed were selected as the research objects.The interaction and kinematic relationships between them were analyzed,and a coupled dynamic and control model of the MSF and the panel structure was established.Then,using this model,numerical simulations were conducted on the system’s stability and dynamic characteristics,and a comparative analysis of vibration transmission before and after active vibration suppression was performed through vibrational energy flow characteristics.The results indicate that the MSF can reduce overall micro-vibration transmission in spacecraft panel structures and attenuate micro-vibration responses at specified locations on the panel,with particularly appreciable suppression effects within the frequency range below 100 Hz.The findings verify the feasibility of MSF for active structural vibration suppression,providing technical support for their multifunctional integrated applications in spacecraft,including attitude control,energy storage,and even vibration suppression.
作者
罗青
于涛
张激扬
周珞晶
樊亚洪
罗睿智
LUO Qing;YU Tao;ZHANG Jiyang;ZHOU Luojing;FAN Yahong;LUO Ruizhi(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Beijing Institute of Control Engineering,Beijing 100090,China)
出处
《振动与冲击》
北大核心
2025年第24期246-258,共13页
Journal of Vibration and Shock
基金
国家自然科学基金(12472350)。
关键词
航天器结构
磁悬浮飞轮(MSF)
微振动抑制
主动作动器
spacecraft structure
magnetic suspension flywheel(MSF)
micro-vibration suppression
active actuator
