Control-Oriented Deep Space Communications For Unmanned Space Exploration
Xinran Fang, Wei Feng, Yunfei Chen, Ning Ge, and Gan Zheng

TL;DR
This paper develops a control-oriented communication optimization scheme for unmanned space exploration, focusing on the mother-daughter system to enhance the efficiency of the sensing, communication, computing, and control loops.
Contribution
It introduces a novel optimization framework for downlink communication in space robot systems, including solutions for block length and power allocation, with analytical insights and simulation validation.
Findings
The proposed scheme optimizes LQR cost effectively.
Derived closed-form solutions for power allocation.
Proved equivalence to max-min rate scheme for certain tasks.
Abstract
In unmanned space exploration, the cooperation among space robots requires advanced communication techniques. In this paper, we propose a communication optimization scheme for a specific cooperation system named the "mother-daughter system". In this setup, the mother spacecraft orbits the planet, while daughter probes are distributed across the planetary surface. During each control cycle, the mother spacecraft senses the environment, computes control commands and distributes them to daughter probes for actions. They synergistically form sensing-communication-computing-control () loops. Given the indivisibility of the loop, we optimize the mother-daughter downlink for closed-loop control. The optimization objective is the linear quadratic regulator (LQR) cost, and the optimization parameters are the block length and transmit power. To solve the nonlinear…
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Taxonomy
TopicsSpacecraft Dynamics and Control · Space Satellite Systems and Control · Space Science and Extraterrestrial Life
MethodsFocus
