Processor State Preservation During Nuclear Events
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Solution Overview
Problem
Electronic devices in areas with increased atmospheric radiation levels, such as after nuclear events, face erratic operation due to radiation-induced shutdowns, leading to loss of processor state as volatile storage is lost upon reboot.
Innovation Solution
An electronic device system comprising a nuclear event detector, primary and backup power supplies, non-volatile storage, and a processor that switches between power sources based on radiation and power status signals to preserve the processor state and ensure continuous operation by using a backup power supply during radiation events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the processor continues operation during nuclear events, then continuous operation is maintained, but processor state is lost due to radiation-induced shutdowns and volatile storage loss
Solution Approach 1:
The system performs preliminary actions by detecting nuclear events before they cause processor shutdown and immediately storing the current processor state to non-volatile storage. This proactive state preservation occurs during the nuclear event window, ensuring that when radiation-induced shutdown occurs, the processor can resume from the last saved state rather than losing all information.
Solution Approach 2:
Non-volatile storage acts as an intermediary between the volatile processor memory and the external nuclear event environment. By transferring critical processor state information to this intermediate non-volatile storage medium, the system isolates the processor from radiation effects while maintaining the ability to restore operational state after shutdown.
2Reliability
If the system uses only primary power supply, then device complexity is reduced, but reliability decreases during power events and nuclear events
Solution Approach 1:
The backup power supply is pre-configured and pre-charged during normal operation, standing by in advance to take over when the primary power supply fails or during nuclear events. This preliminary preparation ensures immediate switchover capability without adding complex real-time power management systems.
Solution Approach 2:
The system changes the power supply parameter by switching from primary to backup power source based on detected conditions (power events or nuclear events). This parameter change enables the system to adapt to adverse conditions while maintaining a relatively simple overall architecture through conditional switching rather than complex continuous management.
3Reliability
If the processor saves state frequently to non-volatile storage, then processor state preservation is improved, but productivity decreases due to storage operations
Solution Approach 1:
Instead of frequently saving the entire processor state, the system applies local quality by selectively saving only critical processor state information to non-volatile storage. This targeted approach preserves essential state data while minimizing the time and resources required for storage operations, thus maintaining higher processing productivity.
Solution Approach 2:
The system performs state saving as a preliminary action triggered by specific events (nuclear event detection) rather than continuously or at fixed intervals. This event-driven approach ensures state preservation occurs only when necessary, avoiding unnecessary storage operations that would reduce productivity during normal operation.
Data Source
AI summary
In some examples, a system comprises a nuclear event detector (NED) to issue a nuclear event status signal, a primary power supply to issue a power status signal, a backup power supply, a non-volatile storage, and a processor coupled to the non-volatile storage and the NED and switchably coupled to the primary and backup power supplies. The processor is to store a state of the processor to the non-volatile storage based on the nuclear event status signal, and the processor is to selectively receive power from either the primary power supply or the backup power supply based on the nuclear event status signal and the power status signal.