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针对航天器质量特性参数辨识问题,提出一种仅仅利用空间机械臂运动作为激励的非合作目标航天器质量特性参数辨识方法。先通过空间机械臂的大范围运动来改变航天器的速度,然后基于动量守恒原理辨识出非合作目标航天器质量特性参数的最小二乘解。其优点是实现了质量、质心与惯性张量等辨识参数的相互解耦,不需要消耗航天器上宝贵的喷气燃料,仅需要空间机械臂进行大范围运动。仿真结果表明,该方法可操作性强、辨识精度高。
Aiming at the problem of spacecraft mass characteristic parameter identification, a parameter identification method of non-cooperative target spacecraft mass characteristic parameter is proposed, which only uses space manipulator motion as excitation. Firstly, the spacecraft velocity is changed by the large-scale movement of the space manipulator, and then the least squares solution of the mass characteristic parameter of the non-cooperative target spacecraft is identified based on the principle of conservation of momentum. The advantage of this method is that decoupling of identification parameters such as mass, centroid and inertial tensor can be achieved without consuming valuable jet fuel on the spacecraft and only requiring space manipulator for a wide range of motion. Simulation results show that this method is feasible and accurate.