一种改进的卫星旋转载荷动平衡的振动结构  

Improved vibrational mechanism for dynamic balance of satellite-borne rotating playload

作　　者：王秋晓[1] 汪飞[1] 孔波[1] 

机构地区：[1]重庆大学机械工程学院,重庆400030

出　　处：《振动与冲击》2016年第3期204-208,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51175529)

摘　　要：卫星旋转天线的动不平衡对卫星在轨姿态稳定性有重大影响,必须加以控制。由于其工作转速低、质偏和高度较大、离心力产生的平动量远小于倾覆力矩产生的摆动量,平衡机测量精度低。提出了一种振动结构,能够将弱的离心力信号从较强的力矩信号中分离开来,并且采用固定摆动中心的方式,确定了振动中心位置。理论和实验表明,平动振动与摆动振动有效实现了机械分离,避免了振动中心不稳定引起的误差等问题,为最终卫星旋转载荷动平衡机的研制提供了理论基础。The dynamic unbalance of a satellite-borne antenna has great influence on the attitude of on-orbit satellite and must be eliminated. However, the current balancing machines＇ measurement accuracy is rather poor due to that the working rpm of the rotating playload is low, the centroidal deviation is large and high, and the translational motion produced by centrifugal force is much less than the rotational motion produced by overturning moment. A vibrational mechanism was introduced which is able to separate the weak centrifugal force signal from the strong moment signal, and the way of fixing the vibration center was adopted in order to make sure that the position of the vibration center could be determined. The theoretical and experimental results show that the signals of translational motion and rotational motion can be separated effectively, and the errors caused by unstable vibration center are avoided, which provides the fundamental basis for the development of a new dynamic balancing machine for the satellite＇s rotating playload.

关 键 词：动平衡机 振动结构 卫星旋转载荷 平动与摆动分离 

分 类 号：TH113.1[机械工程—机械设计及理论]