Lifetime Controller for Dynamic Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices often exceed their designed service lifetime due to conservative reliability analysis, leading to over-engineering and increased costs, while also allowing devices that do not experience worst-case conditions to have extended but unnecessary lifetimes.
Innovation Solution
A lifetime controller that monitors and manages operating conditions by allowing strenuous use initially, accumulating 'credit' for later high-stress periods, and reducing performance to extend the device's lifespan, thereby maintaining a low failure rate and accommodating user demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conservative reliability analysis is used to ensure devices meet target service lifetime, then device reliability is improved, but device complexity and cost increase due to over-engineering
Solution Approach 1:
The patent implements dynamic control of operating conditions based on real-time monitoring of stress factors and accumulated damage. The system adjusts operational parameters dynamically rather than using fixed conservative design margins, allowing the device to operate optimally while managing wear and tear throughout its lifecycle.
Solution Approach 2:
The system continuously monitors operating conditions, stress factors, and device state, then uses this feedback to adjust control decisions. This closed-loop feedback mechanism enables reliable operation without requiring over-engineering, as the system adapts to actual device condition rather than relying on worst-case design assumptions.
2Reliability
If devices are designed with conservative margins to ensure lifetime, then failure rate is reduced, but productivity and performance are reduced due to limited strenuous operation
Solution Approach 1:
The system allows temporary excessive operation beyond normal limits by accumulating and spending operational credit. When damage accumulation is low, the device can operate at higher performance levels or under more strenuous conditions, enabling productivity boosts without compromising long-term reliability.
Solution Approach 2:
The control system dynamically changes operational parameters such as power consumption, processing load, and stress factors based on real-time device state. This allows the device to switch between conservative and aggressive operating modes, optimizing both reliability and productivity based on current conditions.
3Productivity
If devices operate continuously at high performance levels, then productivity is improved, but device lifetime is reduced due to increased wear and tear
Solution Approach 1:
The system implements periodic monitoring and control adjustments, alternating between high-performance operation and recovery periods. By cycling through different operational intensities and managing accumulated damage over time, the system maintains high average productivity while preventing excessive wear that would reduce device lifetime.
4Adaptability or versatility
If operational credit is accumulated during low-stress periods to enable future high-stress operation, then adaptability is improved, but control complexity increases
Solution Approach 1:
The device autonomously monitors its own state, accumulates operational credit based on actual wear and tear, and makes control decisions without external intervention. This self-service approach enables adaptive operation while keeping the control system relatively simple, as the device manages its own lifecycle based on real-time feedback.
Data Source
AI summary
In an embodiment, a lifetime controller is configured to monitor operating conditions for a device, and to control operating conditions based on the previous conditions to improve the reliability characteristics of the device while permitting strenuous use as available. For example, the lifetime controller may permit strenuous use when the device is first powered on. Once a specified amount of strenuous use has occurred, the controller may cause the operating conditions to be reduced to reduce the wear on the device, and thus help to extend the lifetime of the device. Similarly, if a device is used in less strenuous conditions, the controller may accumulate credit which may be expended by permitting the device to operate in more strenuous conditions for a period of time.