With the development of space technology,it is possible to build a space station in Earth-Moon space as a transit for Earth-Moon round-trip and entering in the deep space.Rendezvous and docking is one of the key techn...With the development of space technology,it is possible to build a space station in Earth-Moon space as a transit for Earth-Moon round-trip and entering in the deep space.Rendezvous and docking is one of the key technologies for building an Earth-Moon space station.A guidance strategy for rendezvous and docking from the Earth orbit to the space station in the Earth-Moon NRHO orbit is proposed in this paper,which is suitable for engineering applications.Firstly,the rendezvous and docking process is divided into three sections,i.e.,the large-range orbit transfer section,far-range guidance section,and close-range approaching section.The suitable terminal of large-range orbit transfer is selected according to the eigenvalue of NRHO orbit state transition matrix.The two-impulse guidance method based on the relative motion equation in the three-body problem is adopted for the far-range guidance section.The impulse time and amplitude are solved with the optimization algorithm.The linear constant three-body relative motion equation is proposed for the close-range approaching section,and the rendezvous and docking is completed by a two-stage linear approximation.Finally,a simulation analysis is carried out,and the simulation results show that the adopted dynamics equations and the designed guidance law are effective,and the three flight phases are naturally connected to accomplish the rendezvous and docking mission from the Earth orbit to the space station on the Earth-Moon NRHO.展开更多
储能(Energy Storage,ES)仅参与电网单一场景(调峰或调频)控制,利用率低。首先,提出一种基于ES荷电状态(State of charge,SoC)的调峰调频工作区域划分方法和协同控制策略,可实现ES在调峰与调频控制间切换,进而提高利用率。其次,为进一...储能(Energy Storage,ES)仅参与电网单一场景(调峰或调频)控制,利用率低。首先,提出一种基于ES荷电状态(State of charge,SoC)的调峰调频工作区域划分方法和协同控制策略,可实现ES在调峰与调频控制间切换,进而提高利用率。其次,为进一步提高ES调峰调频效果,在调峰单一场景中分别提出变功率调峰策略和虚拟惯性与下垂控制相结合的综合调频控制策略。然后,在此基础上进一步提出调峰调频协同控制策略。最后,通过仿真实例发现,相比单调峰与单调频控制,基于多时间尺度的协同控制策略,ES利用率分别提高了16.25%与37.29%,说明了该方法和策略的可行性。展开更多
基金National Natural Science Foundation of China(U20B2054)。
文摘With the development of space technology,it is possible to build a space station in Earth-Moon space as a transit for Earth-Moon round-trip and entering in the deep space.Rendezvous and docking is one of the key technologies for building an Earth-Moon space station.A guidance strategy for rendezvous and docking from the Earth orbit to the space station in the Earth-Moon NRHO orbit is proposed in this paper,which is suitable for engineering applications.Firstly,the rendezvous and docking process is divided into three sections,i.e.,the large-range orbit transfer section,far-range guidance section,and close-range approaching section.The suitable terminal of large-range orbit transfer is selected according to the eigenvalue of NRHO orbit state transition matrix.The two-impulse guidance method based on the relative motion equation in the three-body problem is adopted for the far-range guidance section.The impulse time and amplitude are solved with the optimization algorithm.The linear constant three-body relative motion equation is proposed for the close-range approaching section,and the rendezvous and docking is completed by a two-stage linear approximation.Finally,a simulation analysis is carried out,and the simulation results show that the adopted dynamics equations and the designed guidance law are effective,and the three flight phases are naturally connected to accomplish the rendezvous and docking mission from the Earth orbit to the space station on the Earth-Moon NRHO.
文摘储能(Energy Storage,ES)仅参与电网单一场景(调峰或调频)控制,利用率低。首先,提出一种基于ES荷电状态(State of charge,SoC)的调峰调频工作区域划分方法和协同控制策略,可实现ES在调峰与调频控制间切换,进而提高利用率。其次,为进一步提高ES调峰调频效果,在调峰单一场景中分别提出变功率调峰策略和虚拟惯性与下垂控制相结合的综合调频控制策略。然后,在此基础上进一步提出调峰调频协同控制策略。最后,通过仿真实例发现,相比单调峰与单调频控制,基于多时间尺度的协同控制策略,ES利用率分别提高了16.25%与37.29%,说明了该方法和策略的可行性。
