黏附激励下空间目标惯性参数的辨识方法

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.