Spacecraft vibration suppression based on micro-gimbal moment of magnetically suspended flywheel with dynamic feedback and feedforward decoupling control
Spacecraft vibration suppression based on micro-gimbal moment of magnetically suspended flywheel with dynamic feedback and feedforward decoupling control
复制标题
基于动态反馈和前馈解耦控制的磁悬浮飞轮微万向节力矩的航天器振动抑制
DOI：
10.1177/0954406217745339
复制
发表时间：
2018-11-01
影响因子：
2
通讯作者：
Liu, Qiang
中科院分区：
文献类型：
--
作者：
Chen, Xiaocen;Cai, Yuanwen;Liu, Qiang
针对航天器高频振动抑制的突出问题，创造性地提出了一种基于磁悬浮飞轮微框架力矩的动态反馈前馈解耦控制新方法。首先建立了在轨磁悬浮飞轮的动力学模型，设计了航天器的解耦控制律和磁悬浮飞轮的微框架转向律。为了消除航天器对磁悬浮飞轮的扰动，提出了基于动态反馈-前馈电流的扰动补偿器。然后将非线性在轨磁悬浮飞轮系统转化为无航天器耦合的线性系统，采用状态反馈解耦控制器实现磁悬浮飞轮的高精度微框架力矩控制。为了减小未建模动力学对解耦性能的影响，进一步开发了动态补偿滤波器，提高了振动抑制的收敛速度。这三个部分共同构成了动态反馈和前馈解耦控制器。仿真结果表明了该方法的有效性和优越性。
Aimed at solving the prominent issue of spacecraft high-frequency vibration suppression, this paper creatively puts forward a novel method based on the micro-gimbal moment of magnetically suspended flywheel with dynamic feedback and feedforward decoupling control. The dynamic model of the on-orbit magnetically suspended flywheel is established first and the decoupling control law of spacecraft as well as the micro-gimbal steering law of the magnetically suspended flywheel is designed. The disturbance compensator based on dynamic feedback–feedforward current is put forward to cancel the disturbance of spacecraft to the magnetically suspended flywheel. Then the nonlinear on-orbit magnetically suspended flywheel system is converted into a linear system without spacecraft coupling, and the state feedback decoupling controller is used to realize the high-precision micro-gimbal moment control of the magnetically suspended flywheel. The dynamic compensation filter is further developed to reduce the influence of unmodeled dynamics on decoupling performances, improving the rate of convergence of vibration suppression. The above three components constitute together the dynamic feedback and feedforward decoupling controller. The simulation results show the effectiveness and superiority of this method.