Satellite Attitude Control Accuracy Adjustment for Battery Conservation
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Solution Overview
Problem
Artificial satellites powered by solar energy face limitations in image quality due to battery depletion, necessitating a method to ensure image quality while minimizing battery consumption.
Innovation Solution
An artificial satellite system that adjusts attitude control accuracy and imaging conditions based on remaining battery levels, including changing shutter speed, sensitivity, and reducing image resolution, to conserve power while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high accuracy attitude control is maintained, then image quality is improved, but battery consumption increases
Solution Approach 1:
The patent applies dynamics by making the attitude control accuracy adjustable rather than fixed. The management unit dynamically changes the attitude control accuracy based on the remaining battery amount, allowing the system to adapt between high precision (when battery is充足) and energy saving (when battery is low), thus resolving the contradiction between image quality and battery consumption
Solution Approach 2:
The patent changes the parameter of attitude control accuracy based on battery status. When the remaining battery amount is sufficient, high accuracy attitude control is maintained for high quality imaging. When battery is low, the attitude control accuracy is reduced to save power, and imaging parameters are adjusted accordingly to maintain acceptable image quality
2Productivity
If imaging is performed frequently, then productivity is improved, but battery depletes faster
Solution Approach 1:
The system dynamically adjusts imaging frequency and parameters based on battery status. When battery is sufficient, frequent high-quality imaging is performed. When battery is low, imaging frequency is reduced and parameters are adjusted, extending the operational duration of the satellite
Solution Approach 2:
The patent applies partial action by performing imaging at reduced quality or frequency when battery is low, rather than maintaining full imaging capabilities. This allows the satellite to extend its operational life by using only the necessary imaging capacity required by the remaining energy
Data Source
AI summary
The present technology relates to an artificial satellite and a control method thereof that enable to ensure quality of a captured image while suppressing battery consumption. An artificial satellite includes: an imaging device configured to perform imaging of a predetermined region on the ground; and a management unit configured to change accuracy of attitude control in accordance with a remaining battery amount at an instructed imaging time, and configured to change an imaging condition in accordance with accuracy of the attitude control. The present technology can be applied to, for example, an artificial satellite or the like that performs satellite remote sensing by formation flight.