摘要
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。
By considering flexible vibration,a study on identification of mass property for spacecrafts is implemented. By actuating thrusters,information is obtained by using gyro,accelerometer and vibration signal sensor,then modal response is acquired by applying modal filter,and inertia tensor and center of mass position are calculated by interactive iteration,and the total mass is calculated by accelerometer＇s principle.This algorithm＇s numerical solution is solved by batch least square. The algorithm is suitable for spacecrafts whose mode parameters are known and initial states are random. The simulation results indicate that this algorithm can converges rapidly and has high identification precision.
出处
《航天控制》
CSCD
北大核心
2017年第5期9-14,36,共7页
Aerospace Control
关键词
质量特性
挠性附件
交互迭代
模态滤波器
最小二乘法
Mass property
Flexible appendage
Interactive iteration
Modal filter
Least square
