Integrated Targeting and Guidance for Powered Planetary Descent

The Journal of the Astronautical Sciences - 2018
Dilmurat M. Azimov1, Robert H. Bishop2
1Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, USA
2Department of Electrical engineering, University of South Florida, Tampa, USA

Tóm tắt

This paper presents an on-board guidance and targeting design that enables explicit state and thrust vector control and on-board targeting for planetary descent and landing. These capabilities are developed utilizing a new closed-form solution for the constant thrust arc of the braking phase of the powered descent trajectory. The key elements of proven targeting and guidance architectures, including braking and approach phase quartics, are employed. It is demonstrated that implementation of the proposed solution avoids numerical simulation iterations, thereby facilitating on-board execution of targeting procedures during the descent. It is shown that the shape of the braking phase constant thrust arc is highly dependent on initial mass and propulsion system parameters. The analytic solution process is explicit in terms of targeting and guidance parameters, while remaining generic with respect to planetary body and descent trajectory design. These features increase the feasibility of extending the proposed integrated targeting and guidance design to future cargo and robotic landing missions.

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The Journal of the Astronautical Sciences

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