Satellite Deorbiting Drag Device Deployment via Health Sensor Feedback
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Solution Overview
Problem
The increasing amount of space debris in low Earth orbit poses a significant safety risk for satellites and astronauts, with collisions potentially leading to catastrophic events and the Kessler effect, which exacerbates debris accumulation, necessitating a method to reduce satellite orbit lifespan and mitigate debris.
Innovation Solution
A system for deploying a deorbiting drag device on a satellite, comprising a drag device, a health sensor, and a release actuator powered by a photovoltaic panel, which monitors the satellite's health status and releases the drag device when certain conditions are met, such as lack of signal or power draw, to initiate deorbiting through increased atmospheric drag or electrodynamic interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a satellite remains operational for a long duration in orbit, then it can complete its mission objectives, but it eventually becomes space debris contributing to the Kessler effect
Solution Approach 1:
The deorbiting device is deployed in advance when the satellite reaches end-of-life, immediately initiating the deorbiting process before the satellite becomes hazardous debris. The health sensor detects satellite failure conditions and triggers the release actuator to deploy the drag device, converting the satellite from a long-term orbital object to one that will rapidly reenter the atmosphere.
Solution Approach 2:
The satellite's own photovoltaic panel, which generates power during operation, is repurposed to power the release actuator that deploys the deorbiting device. The same solar panels that enabled the satellite's mission are now used to facilitate its controlled demise, converting the power-generating component into a mechanism for active deorbiting.
2Duration of action of moving object
If a deorbiting device is deployed early in the satellite's mission, then the satellite's orbit lifespan is reduced, but the satellite cannot complete its mission objectives
Solution Approach 1:
The health sensor continuously monitors satellite operational status and provides feedback to the control system. When the sensor detects that the satellite has reached end-of-life (through parameters such as power system failure, communication loss, or critical component malfunction), it triggers the release actuator to deploy the deorbiting device. This feedback mechanism ensures the deorbiting device is deployed at the precise moment the satellite is no longer functional, preventing premature deployment that would interfere with mission objectives.
Solution Approach 2:
The deorbiting device remains in a stowed, retained configuration throughout the satellite's operational life, ready for deployment but not yet activated. The release actuator holds the drag device in place until the health sensor confirms satellite failure, at which point the actuator is triggered to release the device. This preliminary positioning without activation allows the satellite to complete its mission while preparing for controlled deorbiting.
3Ease of operation
If a manual deorbiting system is used, then deployment requires human intervention, but response time is delayed and automation is reduced
Solution Approach 1:
The satellite's own health sensor and power system are used to automatically trigger and power the release actuator. The system monitors its own operational status and autonomously initiates deorbiting when failure conditions are detected, without requiring external human intervention. The photovoltaic panel provides power to the actuator, making the system self-sufficient.
Solution Approach 2:
The health sensor continuously monitors satellite parameters and automatically triggers the release actuator when end-of-life conditions are detected. This closed-loop feedback system eliminates the need for manual intervention by automatically detecting failure conditions and initiating deployment, significantly reducing response time from hours or days of human reaction to immediate automated response.
4Device complexity
If the photovoltaic panel is used to power the release actuator, then no additional power source is needed, but the system complexity increases
Solution Approach 1:
The photovoltaic panel serves dual functions: generating power during the satellite's operational phase and powering the release actuator for deorbiting deployment. This multi-functionality eliminates the need for separate power sources for different system phases, reducing overall system complexity while maintaining reliability through resource reuse.
Solution Approach 2:
Instead of discarding the photovoltaic panel's power-generating capability at end-of-life, the system recovers and repurposes it to power the release actuator. The same solar panels that enabled the mission are now utilized to facilitate controlled deorbiting, extending their useful function beyond the primary mission and eliminating waste.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces the satellite's orbit lifespan, thereby decreasing space debris by ensuring safe and controlled re-entry of satellites, addressing the challenge of managing small, fast-moving debris and reducing long-term satellite viability risks.
Implementation Method 1
a photovoltaic panel coupled to a satellite-power inlet, the health sensor, and to the release actuator
Implementation Method 2
decreasing the orbit lifespan of satellites in order to reduce space debris
Data Source
AI summary
To reduce space debris and decrease risks for future space flights and currently operating satellites, NASA requires all satellites to have an end of life deorbiting plan to prevent satellites from having long and indefinite orbit lifespan. Accordingly, disclosed herein are systems and methods for deploying a deorbiting drag device to dramatically decrease the orbit lifespan of satellites. One of the methods comprises: providing power, using a photovoltaic panel, to a central processing unit (CPU) of the satellite; determining, using a health sensor, a health status of the satellite by monitoring activities of the CPU; and releasing a deorbiting drag device based on the health status by diverting power from the photovoltaic panel to a release actuator.