To detect and forecast solar weather in advance is of great importance for humankind to protect power infrastructure on ground and communication satellites in orbit from damaging. In this regard, a large space platform consisting of a solar weather detector, long space tether and a sailcraft with actively adjustable lightness number is constructed. Within the elliptic Sun-Earth restricted three-body system (ESERTBS), merely the motion of the platform along the Sun-Earth line is focused on, full nonlinear dimensional and dimensionless dynamics of the system is established with a massless, taut and rigid/flexible tether. A sliding mode controller is developed to make the closed-loop dynamics asymptotically stable and the prescribed constant dimensional distance between the Sun and detector is maintained thereby. The time histories of some critical variables of the closed-loop system are presented to verify the performance of the developed controller, to check the lightness number of the sailcraft required, to show the internal tension/strain within the tether etc. Moreover, the steady-state responses of the closed-loop dynamic system are also presented to give more information. The lightness number of a single sailcraft used for performing the mission is compared to the lightness number of the sailcraft of the proposed platform. Some discussions and suggestions for selecting the tether’s length and elasticity are presented from the aspect of the lightness number required, the internal tension and strain based on numerical simulations.

提前探测和预报太阳天气对于人类保护地面电力基础设施和在轨通信卫星免受破坏具有重要意义。在这方面，建造了一个由太阳天气探测器、长空间系绳和可主动调节亮度数的帆船组成的大型空间平台。在椭圆型日地限制三体系统（ESERTBS）中，仅关注平台沿日地线的运动，系统的全非线性维数和无量纲动力学建立在无质量、紧绷和刚性/灵活的系绳。开发了一种滑模控制器，使闭环动力学渐近稳定，从而保持太阳和探测器之间规定的恒定尺寸距离。提出了闭环系统的一些关键变量的时间历程，以验证开发的控制器的性能，检查所需的帆船的轻量化，显示系绳内的内部张力/应变等。此外，稳定还提供了闭环动态系统的状态响应以提供更多信息。将用于执行任务的单个帆船的亮度数与所提议平台的帆船的亮度数进行比较。基于数值模拟，从所需的轻度数、内部张力和应变方面提出了选择系绳长度和弹性的一些讨论和建议。检查所需的帆船的轻量化，显示系绳内的内部张力/应变等。此外，还提供了闭环动态系统的稳态响应以提供更多信息。将用于执行任务的单个帆船的亮度数与所提议平台的帆船的亮度数进行比较。基于数值模拟，从所需的轻度数、内部张力和应变方面提出了选择系绳长度和弹性的一些讨论和建议。检查所需的帆船的轻量化，显示系绳内的内部张力/应变等。此外，还提供了闭环动态系统的稳态响应以提供更多信息。将用于执行任务的单个帆船的亮度数与所提议平台的帆船的亮度数进行比较。基于数值模拟，从所需的轻度数、内部张力和应变方面提出了选择系绳长度和弹性的一些讨论和建议。将用于执行任务的单个帆船的亮度数与所提议平台的帆船的亮度数进行比较。基于数值模拟，从所需的轻度数、内部张力和应变方面提出了选择系绳长度和弹性的一些讨论和建议。将用于执行任务的单个帆船的亮度数与所提议平台的帆船的亮度数进行比较。基于数值模拟，从所需的轻度数、内部张力和应变方面提出了选择系绳长度和弹性的一些讨论和建议。