Rack Interlock System Limits Sled Extension for Stability
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Solution Overview
Problem
In systems with multiple rack-mounted devices, the partial insertion of chassis can create a tipping moment that may cause the rack to topple, especially during service or seismic events, as each chassis can be cantilevered and contribute to the overall instability.
Innovation Solution
A rack interlock system equipped with sensors and a controller that monitors the number of extended sleds and activates a locking mechanism to prevent excessive tipping by locking remaining sleds in place once a predetermined number is extended, thereby maintaining rack stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple sleds are extended simultaneously for hardware transfer, then productivity is improved, but the rack stability deteriorates due to increased tipping moment
Solution Approach 1:
The system uses sensors to detect the position of each sled and provides feedback to the controller. The controller monitors the number of extended sleds and automatically activates the locking mechanism when the predetermined limit is reached, creating a closed-loop control system that prevents tipping while allowing efficient hardware transfer
Solution Approach 2:
The locking mechanism acts as an intermediary between the sleds and the rack structure. It selectively restricts the movement of non-extended sleds while allowing extended sleds to remain accessible, mediating between the need for stability and the need for productivity
2Stability of the object's composition
If a locking mechanism is implemented to prevent tipping, then rack stability is improved, but device complexity increases
Solution Approach 1:
The system is designed to be self-regulating through automatic sensor detection and controller activation. Once a predetermined number of sleds are extended, the locking mechanism automatically engages without requiring manual intervention, and automatically releases when sleds are retracted, making the system self-service and reducing operational complexity
Solution Approach 2:
The patent replaces purely mechanical interlocking systems with an integrated sensor-controller-actuator system. This substitution allows for more precise control and monitoring while maintaining relatively simple mechanical locking components, reducing overall system complexity through intelligent control
Data Source
AI summary
A system and method are provided for an interlock that limits the number of electronic devices that may extend from a rack system. In the system, sensors attached to the rack detect the extension of a rail from the rack. The sensors provide a controller with data from which the controller determines a number of rails that are extended from the rack. If the number of extended rails is determined by the controller to exceed a threshold number, the controller actuates a latch system that closes to lock the remaining devices within the rack.