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考虑挠性附件的振动,研究了航天器在轨质量特性辨识问题。利用推力器产生激励,采用陀螺仪、加速度计和振动信号传感器作为敏感器,设计了模态滤波器提取各阶模态响应。通过交互迭代,设计了转动惯量和质心位置的辨识算法;根据加速度计原理,设计了质量的辨识算法。采用批量最小二乘法对算法进行求解。该算法适用于模态参数已知、任意初始状态航天器的质量特性辨识。仿真结果表明算法收敛速度快、辨识精度高。
Considering the vibration of the flexible attachments, the recognition of on-orbit mass characteristics of the spacecraft is studied. Using thrusters to generate stimuli, gyroscopes, accelerometers and vibration signal sensors are used as sensors. Modal filters are designed to extract the modal responses of each stage. Through the interaction iteration, the identification algorithms of moment of inertia and centroid position are designed. According to the principle of accelerometer, the identification algorithm of mass is designed. Solve the algorithm by using batch least square method. The algorithm is applicable to the identification of the mass characteristics of spacecraft with known modal parameters and any initial state. The simulation results show that the algorithm converges fast and the identification accuracy is high.