【摘要】 针对黏附卫星会自然激励目标改变运动状态的现象,提出一种利用黏附激励进行空间非合作目标惯性参数的辨识方法。黏附前,利用主星对目标特征点的视觉测量,建立估计目标惯性参数与相对运动参数的滤波器,并估计目标的转动惯量比和质心;黏附后,主星直接利用该滤波器估计目标的新的质心速度,并基于动量守恒原理计算目标质量。该方法不仅充分利用黏附过程的自然激励,无需常规辨识必须的主动激励,而且激励前后算法一致,无需切换。数字仿真证实了算法的有效性。更多还原

【Abstract】 Focusing on the phenomenon that the adhesive satellites excite a target to change its motion states, a new identification method based on adhesive excitation for the inertial parameter identification of a non-cooperative spacecraft is proposed based on the adhesive excitation. Before the adhesive process, a filter to estimate the target inertial parameters and relative motion parameters is constructed based on the vision information between the master satellites and feature points on target, and is used to estimate the inertia moment ratio and centroid of the target. After the adhesive process, the filter will directly estimate the target centroid velocity changed by the adhesion excitation, and the target mass could be identified by the principle of momentum conservation. The proposed method not only can sufficiently apply the natural excitation in the adhesive process to avoid the extra active excitation required in conventional identification methods, but also maintain the algorithm’s consistency through the adhesive process to avoid the algorithm switch. The numerical simulation confirms the effectiveness of the proposed method.更多还原