Flexible aerospace structure presents dynamic characteristics of low natural frequency and slow amplitude attenuation. Attitude adjustment or orbital maneuver for the spacecraft can excite the vibration of its flexible appendages/structures, which is prone to affect the normal operation of spacecraft. To address such problems, this paper introduces a feasible methodology by using reaction wheel (RA). The active feedback control strategy is established based on the relation of the measured bending moment and the wheel's rotating speed. The control law with a PD controller is adopted. The torque induced by the speed change of RA can be considered as an artificial damping to accelerate structural vibration attenuation. To guarantee the vibration suppression effectiveness and efficiency for engineering application, a modal identification approach using RA is proposed. The identification algorithm is designed by a vector fitting algorithm of rational polynomial combined with Fast Fourier Transform algorithm. The identified modal parameters are also utilized to design input shaper for the RA braking speed function, which is well verified to avoid undesired excitation. Both the numerical simulation and experimental research demonstrated the success of adopting reaction wheel as an actuator. For a full-scale solar array, the time required for vibration attenuation to the same amplitude is reduced from 602.8 sec to 162.4 sec.

灵活的航空航天结构具有低固有频率和慢幅度衰减的动态特性。航天器的姿态调整或轨道操纵会激发其柔性附件/结构的振动，这容易影响航天器的正常运行。为了解决这些问题，本文介绍了一种使用反作用轮（RA）的可行方法。根据测得的弯矩与车轮转速之间的关系，建立主动反馈控制策略。采用带PD控制器的控制律。RA的速度变化所引起的扭矩可被视为人工阻尼，以加速结构振动的衰减。为了保证减振效果和工程应用效率，提出了一种使用RA的模式识别方法。通过有理多项式的矢量拟合算法结合快速傅里叶变换算法设计识别算法。识别出的模态参数也可用于设计用于RA制动速度功能的输入整形器，已对其进行了很好的验证，以避免产生不希望的激励。数值模拟和实验研究均表明采用反作用轮作为致动器是成功的。对于全尺寸太阳能电池阵列，将振动衰减到相同幅度所需的时间从602.8秒减少到162.4秒。识别出的模态参数也可用于设计用于RA制动速度功能的输入整形器，已对其进行了很好的验证，以避免产生不希望的激励。数值模拟和实验研究均表明采用反作用轮作为致动器是成功的。对于全尺寸太阳能电池阵列，将振动衰减到相同幅度所需的时间从602.8秒减少到162.4秒。识别出的模态参数也可用于设计用于RA制动速度功能的输入整形器，已对其进行了很好的验证，以避免产生不希望的激励。数值模拟和实验研究均表明采用反作用轮作为致动器是成功的。对于全尺寸太阳能电池阵列，将振动衰减到相同幅度所需的时间从602.8秒减少到162.4秒。