Rover Radiation Control Using Error Feedback and Orientation
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Solution Overview
Problem
Existing rovers face significant challenges in reducing the effects of cosmic radiation, which cause bit flipping and increased failure rates in electronic components, especially when using terrestrial components not designed for space environments.
Innovation Solution
A control device that computes radiation effects based on error information from multiple processing devices, using mounting position and durability information to adjust rover orientation, power levels, and deploy shields to mitigate radiation impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If terrestrial components are used in the rover, then manufacturing cost and ease of manufacture are improved, but reliability under radiation exposure deteriorates due to bit flipping and component failures
Solution Approach 1:
The system performs preliminary detection of radiation-induced errors by monitoring bit flipping in real-time. The detection unit identifies errors before they cause complete system failure, allowing for preventive corrective actions to be taken. This aligns with the patent's approach of continuously monitoring error information from terrestrial components and taking corrective measures based on detected radiation effects.
Solution Approach 2:
The system implements a feedback mechanism where error information from terrestrial components is continuously detected and fed back to the control unit. The control unit then adjusts system parameters or activates protective measures based on this feedback. This closed-loop approach maintains reliability while using terrestrial components, directly addressing the contradiction between ease of manufacture and reliability under radiation.
2Reliability
If radiation shielding is added to protect components, then reliability under radiation exposure is improved, but device complexity and weight increase
Solution Approach 1:
Instead of providing uniform radiation shielding across the entire rover, the system applies protective measures locally to specific components based on their radiation sensitivity and error detection results. The control unit selectively activates protective functions for affected components, reducing overall system complexity while maintaining reliability where needed.
Solution Approach 2:
The patent introduces an intermediary detection and control system between the radiation environment and the terrestrial components. Rather than directly shielding all components, the error detection unit acts as an intermediary that identifies radiation effects and triggers selective protective responses, reducing the need for extensive physical shielding while maintaining component reliability.
3Reliability
If error detection and correction systems are implemented, then reliability is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The terrestrial components are equipped with self-diagnostic capabilities that allow them to automatically detect radiation-induced errors without requiring complex external monitoring systems. The components monitor their own error states and can trigger protective measures autonomously, reducing the overall system complexity while maintaining high reliability through self-service error detection and correction.
Data Source
AI summary
A control device includes a computation section that computes information related to an effect of radiation received by a rover based on error information of a processing device provided to the rover, and a control section that performs control so as to reduce the effect of radiation received by the rover based on the information related to an effect of radiation computed by the computation section.