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. For the identification of mass parameter of non-cooperative space target in on-orbit servicing missions, a method of mass identification based on vibration characteristic of the flexible-joint manipulator is proposed. Firstly, the flexible-joint manipulator captures non-cooperative target. Then, the dynamic model of the combined-body formed by operational spacecraft, flexible-joint manipulator and non-cooperative space target is established. Finally, the mass of non-cooperative space target is identified by analyzing the vibration frequency of the manipulator. Numerical simulation results show the effectiveness of the method.

Identification of Mass Parameter of Non-Cooperative Space Target based on Vibration Characteristic of Flexible-joint Manipulator