三体直连式旋转电动力绳系卫星系统起旋过程柔性形变控制

This paper studies the control problem of three-inline tether satellite system using electric power to accelerate from a stationary state to the desired spinning rate. It has been found in this paper that, due to the coupling effect of two tethers, more significant tether deformation emerges during the spin-up process than that of a single tether system, which is the main challenge for the spin-up process of tether satellite system. To solve this problem, in this paper, the feedback control of the current is investigated to suppress the flexible deformation of the tether in the spinning process, to achieve the stable and synchronous spinning of the two tethers. Firstly, the Lagrange approximation model for controller design and the flexible lumped model for controller verification are established. Secondly, an adaptive sliding mode controller based on prescribed performance is proposed to solve the deformation problem of tethered satellite system. Numerical simulation results demonstrate that under the regulation of this control strategy, the spinning motion of the tether can achieve stable performance and the tether deformation is suppressed to an insignificant level.