Lunar Satellite Function Assignment via Relative Position Control
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Solution Overview
Problem
Existing lunar orbiting satellite systems struggle with assigning functions such as communication and positioning to artificial satellites based on their relative position to the Earth, and lack clear methods for orbit and attitude control for satellites in lunar orbits other than Earth orbits.
Innovation Solution
A lunar orbiting satellite system with a control unit that includes a satellite orbit planning unit to assign functions like communication or positioning to artificial satellites based on their two-dimensional projected relative position to the Moon, and a satellite control unit to execute orbit and attitude adjustments accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If artificial satellites are used for GPS positioning on Earth orbit, then positioning accuracy is improved, but the satellites cannot be assigned to other functions such as communication depending on their relative position with respect to the Earth
Solution Approach 1:
The patent implements dynamic function assignment that changes based on the real-time relative position between satellites and the Moon. The control unit continuously monitors satellite positions and dynamically assigns functions (positioning, communication, observation) according to the two-dimensional projected relative position, allowing the system to adapt to changing geometric configurations and eliminate idle standby periods.
Solution Approach 2:
The system changes the operational parameters of satellites based on their relative position to the Moon. By calculating the two-dimensional projected relative position and using this as a basis for function assignment, the system transforms the fixed Earth-orbit operational mode into a flexible lunar-orbit mode where satellite functions are continuously optimized according to positional parameters.
2Adaptability or versatility
If artificial satellites fly on Earth orbits such as sun-synchronous orbit, then specific observation functions are achieved, but the technology cannot be applied to lunar orbits
Solution Approach 1:
The patent creates a universal control system that can manage satellites in any orbit type, including lunar orbits. The control unit is designed to calculate relative positions and assign functions regardless of whether satellites are in Earth orbit or lunar orbit, making the system multi-functional and applicable to different orbital environments without requiring separate control mechanisms.
Solution Approach 2:
The system dynamically adjusts control parameters based on the orbital environment. By continuously calculating the relative position between satellites and the Moon and using this information for function assignment, the system adapts to the specific characteristics of lunar orbits while maintaining the same fundamental control architecture, thus reducing overall system complexity.
3Productivity
If the relative position of artificial satellites with respect to the Moon changes due to the Moon's revolution period, then observation conditions from Earth vary, but function assignment becomes less efficient
Solution Approach 1:
The control unit implements a feedback mechanism that continuously monitors the relative position between satellites and the Moon, and uses this information to dynamically adjust function assignment. This closed-loop control ensures that satellites are always assigned to optimal functions based on current geometric configurations, eliminating standby time caused by unfavorable relative positions and maximizing productivity.
Data Source
AI summary
A lunar orbiting satellite system executes orbit planning of assigning a function (positioning, communication, and flashing) to an artificial satellite (AS) depending on a relative position of the AS to the moon at a time when the moon and the AS are observed from an input point on the earth, and correcting the relative position, which changes in accordance with the moon revolution period. The system includes: a satellite orbit planner which assigns a function to each ASs forming an AS group flying around the moon depending on a relative position of each ASs to the moon at a time when the moon and ASs are observed from an input point on the earth, and set a target orbit according to the function; and a satellite controller which causes the each ASs to execute control based on the function to implement switching of the function.