Adaptive Cruise Launch Timing for Intersection Vehicle Queues
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Solution Overview
Problem
Current full speed range adaptive cruise control systems face challenges in determining the optimal launch time from a stop at intersections, leading to potential driver annoyance or confusion due to timing delays and variations in vehicle queues, which are not adequately addressed by existing systems.
Innovation Solution
A full speed range adaptive cruise control system that calculates an adaptive launch time based on the vehicle's position within a queue, overall queue length, situational data, and timing delays, while also considering user preferences, environmental factors, and dynamic inputs to customize the launch time for improved synchronization with surrounding vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vehicle resumes driving immediately after the traffic light changes from red to green, then the vehicle can reduce waiting time and improve productivity, but this may cause driver anxiety or override the autonomous control due to unsafe launch timing
Solution Approach 1:
The system performs preliminary analysis of queue dynamics, timing delays, and environmental factors before determining the optimal launch time. By calculating the adaptive launch time in advance based on predicted queue behavior, the system ensures safe and timely vehicle resumption without causing driver anxiety.
Solution Approach 2:
The system continuously monitors queue dynamics, vehicle positions, and driver responses to refine the adaptive launch time calculation. By incorporating real-time feedback from queue progression and driver state, the system optimizes the launch timing to balance productivity with driver acceptance and safety.
2Reliability
If the vehicle waits for the complete queue to clear before launching, then the vehicle can ensure safe launch timing and improve reliability, but this increases waiting time and reduces productivity
Solution Approach 1:
The system dynamically adjusts the launch timing parameters based on queue length, position in queue, and timing delay characteristics. By optimizing these parameters, the system determines the earliest safe launch time that ensures reliability while maximizing productivity, rather than waiting for complete queue clearance.
Solution Approach 2:
The system adapts the launch timing strategy in real-time based on changing queue conditions, vehicle positions, and environmental factors. This dynamic approach allows the vehicle to launch at the optimal moment that balances safety requirements with throughput optimization.
3Ease of operation
If the system uses a fixed launch time strategy, then the system complexity is reduced and ease of operation is improved, but the system cannot adapt to varying queue dynamics and environmental conditions
Solution Approach 1:
The system pre-calculates the adaptive launch time by analyzing queue characteristics, timing delays, and environmental conditions before the vehicle needs to launch. This preliminary analysis simplifies the actual launch decision while incorporating complex adaptive considerations, maintaining ease of operation with enhanced adaptability.
4Productivity
If the vehicle launches too early from the stop, then the vehicle can improve productivity and reduce waiting time, but this may create driver confusion or override the autonomous control
Solution Approach 1:
The system monitors driver state and responses to adjust the launch timing accordingly. By incorporating driver feedback and physiological state information, the system ensures that productivity optimizations do not compromise driver confidence or lead to unwanted overrides.
Data Source
AI summary
A full speed range adaptive cruise control system for a vehicle that stops at an intersection includes one or more controllers that execute instructions to receive localization data and situational data related to the vehicle. The one or more controllers determine, based on localization data and situational data, that the vehicle is approaching an intersection and will come to a stop at the intersection, where the vehicle is part of a queue including one or more surrounding vehicles. In response to determining the vehicle has come to a stop, the controller determines a position of the vehicle within the queue and an overall length of the queue. The controller calculates an adaptive launch time based on at least the position of the vehicle within the queue, the overall length of the queue, the situational data, and a timing delay associated with the queue.