Safety-Enabled Control System for Mode Switching
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Solution Overview
Problem
Existing control systems lack the capability to ensure safe and authorized switching between autonomous and supervised modes, and do not allow centralized control of multiple systems from a single remote unit.
Innovation Solution
A safety-enabled control system that includes a safety system interposed between a control system and a system-under-control, performing command gating and input validation to ensure safe control values are transmitted, with explicit authorization for mode switching and centralized control via a remote unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mode switching is allowed without explicit authorization, then operational flexibility is improved, but safety and reliability deteriorate
Solution Approach 1:
The patent introduces an authorization management mechanism as an intermediary between mode switching requests and execution. This mechanism verifies explicit authorization before allowing transitions between autonomous and supervised modes, ensuring safety while maintaining operational flexibility. The intermediary checks authorization credentials and validates switching conditions before permitting mode changes.
2Adaptability or versatility
If each system is controlled by separate remote units, then system independence is improved, but control complexity deteriorates
Solution Approach 1:
The patent implements a universal remote control unit capable of controlling multiple different systems through a standardized communication interface. This multi-functional approach allows a single remote unit to operate various systems independently while maintaining consistent control protocols, reducing overall control complexity without compromising system independence.
Solution Approach 2:
The control architecture is segmented into independent system modules, each with its own control parameters and operational modes. This segmentation allows each system to be controlled independently through the universal remote unit while maintaining clear boundaries and separate control logic for each system component.
3Reliability
If safety validation is performed on all input commands, then safety is improved, but processing time deteriorates
Solution Approach 1:
The patent implements preliminary validation of control inputs against predefined safety criteria and operational parameters before commands are executed. By performing safety checks in advance and caching validated control ranges, the system ensures comprehensive safety validation without adding significant processing delays during critical operation phases.
Solution Approach 2:
The safety validation mechanism applies full verification to critical control parameters while using simplified checks for non-critical inputs. This partial validation approach focuses computational resources on safety-critical functions while maintaining acceptable processing speeds for routine operations, balancing thorough safety checking with real-time performance requirements.
Data Source
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AI summary
Systems and methods for safety-enabled control.