Terminal Landing Guidance Law Using Analytic Gravity Turn Trajectory

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AAS-23-152.pdf (3.62 MB)
Author(s)
Han, Seungyeop
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Daniel Guggenheim School of Aerospace Engineering
The Daniel Guggenheim School of Aeronautics was established in 1931, with a name change in 1962 to the School of Aerospace Engineering
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https://hdl.handle.net/1853/74898
Abstract
This paper introduces the terminal landing guidance law based on the analytic solution of gravity-turn trajectory. Characteristics of the derived solution are investigated, and the solution is used for the generation of a reference two-dimensional vector field that satisfies terminal landing conditions. In addition, the vector field is further expanded to consider ground collision avoidance as well as three-dimensional problem. A nonlinear control law is applied to track the reference vector efficiently within a finite time. The effectiveness of the proposed method is demonstrated through nonlinear numerical simulations, and performances are compared with existing methods.
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2023-01
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