In this paper a new drag-energy scheme for atmospheric entry guidance, based on the use of pseudospectral methods and convex optimization, is proposed. One of the most successful technologies to deal with atmospheric entry is the class of drag-tracking schemes, a direct heritage of the Space Shuttle program. The method that we propose exploits the drag-dynamics, and allows for an efficient automatic design of an optimal entry profile satisfying all the longitudinal constraints acting on the vehicle. A new representation of the entry-guidance problem, able to loss-less convexify the formulation, is provided. Numerical simulations confirm the validity of the proposed scheme as tool for further improving the autonomy of modern entry guidance systems, with a mean final range-to-go error at the end of entry phase smaller than 2 km, and the capability to re-compute a complete constrained trajectory to meet the mission requirements.

在本文中，基于伪谱方法和凸优化的使用，提出了一种用于大气进入引导的新阻力能量方案。处理大气进入最成功的技术之一是阻力跟踪方案，这是航天飞机计划的直接遗产。我们提出的方法利用了阻力动力学，并允许对满足作用在车辆上的所有纵向约束的最佳入口轮廓进行有效的自动设计。提供了一种新的入口引导问题表示，能够无损地凸化公式。数值模拟证实了所提出的方案作为进一步提高现代进入制导系统自主性的工具的有效性，进入阶段结束时的平均最终距离误差小于 2 公里，