Vehicle Speed Control System for Transitory Limits
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Solution Overview
Problem
Current vehicle control systems face inefficiencies due to the need for manual intervention when speed limits change, particularly with transitory speed limits, leading to unnecessary delays and reduced automatic control time, especially when slow orders expire during long trips.
Innovation Solution
A control system that determines the status of transitory speed limits and automatically adjusts operational settings to ensure compliance, generating new trip plans to optimize speed and arrival times, thereby reducing manual intervention and increasing automatic control time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vehicle system travels through multiple route segments with transitory speed limits over long distances, then the vehicle must frequently adjust speeds to comply with speed limits, but manual intervention is required when slow orders expire, leading to unnecessary delays and reduced automatic control time
Solution Approach 1:
The control system automatically monitors the expiration status of slow orders and self-adjusts operational settings without requiring manual operator intervention. The system queries the status of transitory speed limits, determines expiration automatically, and switches speed limits autonomously, enabling the vehicle system to serve itself in managing speed compliance throughout the trip.
Solution Approach 2:
The control system continuously queries the status of transitory speed limits and receives feedback about expiration. This feedback mechanism allows the system to detect when a slow order has expired and automatically adjust the speed limit accordingly, creating a closed-loop control system that maintains optimal automatic control time.
2Reliability
If the control system manually monitors and adjusts speed limits for each route segment, then speed compliance can be maintained, but operator workload increases and automatic control time is reduced
Solution Approach 1:
The control system performs self-monitoring of slow order expiration status and self-adjusts speed limits automatically. This eliminates the need for operators to manually track and respond to speed limit changes, significantly reducing operator workload while maintaining reliable speed compliance through automated enforcement.
Solution Approach 2:
The control system proactively queries the status of transitory speed limits before they expire and prepares speed adjustments in advance. This preliminary action ensures smooth transitions between speed limits without requiring reactive manual intervention, maintaining compliance while reducing operational complexity.
3Productivity
If the vehicle system maintains automatic control throughout the entire trip, then operational efficiency is maximized, but the system may not respond appropriately to expiring slow orders without manual intervention
Solution Approach 1:
The control system maintains automatic control while incorporating continuous feedback queries about slow order expiration status. This feedback loop enables the system to adapt automatically to changing speed limit conditions, responding appropriately to expiring slow orders without breaking automatic control mode, thus preserving both productivity and adaptability.
Solution Approach 2:
The control system dynamically adjusts its behavior based on the expiration status of slow orders. It automatically switches between different speed limits and operational modes in response to real-time conditions, enabling the system to remain adaptable to changing requirements while maintaining continuous automatic control and maximizing operational efficiency.
Data Source
AI summary
A control system includes a controller that may determine whether a second speed limit, which is less than or equal to a first speed limit, is in effect for a segment of the route. The controller may switch one or more operational settings of a vehicle from the first speed limit to the second speed limit, and may operate the vehicle at the first speed limit outside of the segment of the route and operate the vehicle at or below the second speed limit while the vehicle is approaching or within the segment of the route.