Lane Change Time Adjustment for Driver Security
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Solution Overview
Problem
Existing automatic driving systems do not adequately consider the presence of moving objects in the environment when setting lane change times, leading to feelings of insecurity or unease for drivers during lane changes.
Innovation Solution
An automatic driving system that includes an information acquiring device to gather driving environment information and a running control device to set lane change times based on the relative position and speed of moving objects, adjusting the initial lane change time to reduce driver unease and enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane change time is set based on vehicle speed only, then the control is simple and fast, but the driver feels insecure or uneasy when moving objects are present
Solution Approach 1:
The system introduces feedback by continuously monitoring the presence and state of moving objects around the vehicle during lane change operations. The lane change time is dynamically adjusted based on feedback from sensors detecting moving objects, their positions, and relative speeds, creating a closed-loop control system that adapts to real-time conditions rather than relying solely on pre-set vehicle speed parameters.
Solution Approach 2:
The lane change time parameter is transformed from a static value determined only by vehicle speed into a dynamic parameter that automatically adjusts based on the detected moving object environment. The system calculates different lane change times depending on whether moving objects are present in the target lane, their relative positions, and their motion states, making the control adaptive and context-dependent.
2Reliability
If the lane change time is extended to account for moving objects, then driver security improves, but the lane change operation takes longer
Solution Approach 1:
The system changes the lane change time parameter dynamically based on the detected state of moving objects. When no moving objects are present or they are at safe distances, the system uses a standard lane change time for efficiency. When moving objects are detected in critical positions or moving towards the vehicle, the system extends the lane change time to ensure safe completion, thus adapting the time parameter to the specific operational context.
Solution Approach 2:
The system applies different lane change time adjustments based on the local spatial distribution and motion characteristics of moving objects. Rather than uniformly extending the lane change time for all situations, the system selectively adjusts the time parameter based on the specific position, speed, and trajectory of detected moving objects, applying extended timing only where and when necessary for safety.
3Reliability
If the system monitors moving objects and adjusts lane change time dynamically, then safety improves, but the calculation and control complexity increases
Solution Approach 1:
The system performs preliminary detection and assessment of moving objects before initiating lane change control. By提前 identifying the presence, position, and motion state of moving objects in the target lane, the system can pre-determine the appropriate lane change time adjustment, simplifying the real-time control calculations during the actual lane change execution rather than requiring complex continuous recalculation throughout the maneuver.
Data Source
AI summary
An automatic driving system that is mounted in a vehicle includes: an information acquiring device configured to acquire driving environment information indicating a driving environment of the vehicle; and a running control device configured to execute lane change control from a first lane to a second lane, and set a lane change time which is a time required for lane change The running control device is configured to set an initial value of the lane change time, determine whether a moving object having a highest degree of approach to the vehicle is present in the second lane, and change the initial value based on a relative position of the moving object with respect to the vehicle and a relative speed of the vehicle with respect to the moving object when it is determined that the moving object having the highest degree of approach is present in the second lane.