撓性欠驅(qū)動(dòng)航天器的姿態(tài)鎮(zhèn)定方法
[Abstract]:Aiming at the problem of attitude stabilization of flexible underactuated spacecraft, a fault tolerant control method based on adaptive observer is proposed, which makes the angular velocity and attitude of spacecraft converge to a bounded region. The flexible spacecraft under consideration is almost axisymmetric, in which the small parameter 蔚 gives the degree of asymmetry of the spacecraft with respect to the underdrive axis. Firstly, the idea of homogeneous system is used to simplify the model of the system and eliminate some coupling items which are difficult to deal with. Secondly, the adaptive observer is designed to estimate the unknown information of the flexible nonlinear term, and the norm boundary between the observed value and the true value is given. Furthermore, a fault-tolerant controller is designed so that the output of the system is stable in the input state for the estimation of the coupling term. Finally, the simulation results show the effectiveness of the proposed method.
【作者單位】: 南京航空航天大學(xué)自動(dòng)化學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(6127317161473143) 中央高;究蒲袠I(yè)務(wù)費(fèi)(NE2014202,NE2015002,NE2015103)
【分類號(hào)】:V448.22
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