A5025459251- Astro and Planetary Science
- Spacecraft Dynamics and Control
- Space Satellite Systems and Control
- Spacecraft and Cryogenic Technologies
- Sports Performance and Training
- Experimental and Theoretical Physics Studies
- Sports Dynamics and Biomechanics
- Gas Dynamics and Kinetic Theory
- Rocket and propulsion systems research
Nanjing University of Aeronautics and Astronautics
2022-2025
This paper presents a reinforcement-learning (RL)-based robust low-thrust guidance method for asteroid approaching under process uncertainties. Markov decision processes with stochastic dynamics are formulated RL. To overcome the problem of low terminal accuracy in RL-based transfer trajectory design, zero-effort-miss/zero-effort-velocity (R-ZEM/ZEV) is proposed. Originally, an eigenvalue-related term defined according to stability conditions ZEM/ZEV feedback system and chosen as learning...
Jupiter exploration is one of the focuses deep space in near future. Design and optimization trajectories Jovian system are crucial technologies for missions due to unique challenging multi-body dynamical environment. Various methodologies have been proposed developed. However, there a lack comprehensive review these methodologies, which unfavorable further developing new design techniques proposing mission schemes. This provides systematic summarization past state-of-art 4 main phases,...
Tisserand-leveraging transfers (TILTs) were proposed as techniques to achieve an endgame tour with small orbit insertion maneuvers and short flight times in low-energy regions of the planar, circular, restricted three-body problem. This paper presents a new formulation TILTs framework similar classical Lambert The developed algorithm searches for trajectories constraints on boundary values time by solving one-dimensional root-finding Compared traditional TILTs, enhances its generality...
For the mission requirement of collision-free asteroid landing with a given time flight (TOF), fast generation method reachable domain based on section and expansion is proposed. First, to overcome difficulties trajectory optimization caused by anti-collision path constraints, two-stage model used improve efficiency optimization. Second, velocity increment under long TOF analyzed obtain distribution law affected TOF, problem transformed into solution initial boundary continuous boundary....