Vehicle Speed Control Profiles for Lane Change Positioning
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Solution Overview
Problem
Autonomous vehicles face challenges in adjusting their speed and position to safely interact with other traffic participants and obstacles, particularly when attempting to reach a target position or perform maneuvers like lane changes.
Innovation Solution
A method and device for determining a control profile with control parameters to adjust a vehicle's speed from an initial to a target speed, using a speed control system, and integrating this with a detection system to account for surrounding vehicles and conditions, optimizing for time, wear, and energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle adjusts its speed frequently to reach target position and interact with traffic participants, then the positioning accuracy and interaction safety are improved, but the wear on braking and acceleration systems increases
Solution Approach 1:
The control profile is determined in advance to include both acceleration and deceleration phases. The method calculates the complete speed adjustment trajectory before execution, planning the deceleration phase alongside the acceleration phase. This preliminary planning allows the vehicle to reach target positions efficiently while minimizing unnecessary braking and acceleration cycles, thereby reducing wear on the systems.
Solution Approach 2:
The system dynamically adjusts speed based on determined control profiles that adapt to varying traffic conditions, target positions, and interaction requirements. The speed control system continuously monitors and adjusts parameters within the control profile to optimize the balance between reaching targets accurately and minimizing energy-consuming maneuvers.
2Manufacturing precision
If the vehicle uses multiple control profile parts with switching points for speed adjustment, then the speed control precision is improved, but the control system complexity increases
Solution Approach 1:
The control profile is divided into multiple control profile parts, each with specific acceleration or deceleration characteristics. Switching points are introduced to transition between these parts, allowing precise control of speed adjustments. The segmentation enables the system to handle complex speed control scenarios by breaking them down into manageable phases while maintaining overall precision.
Solution Approach 2:
The speed control system monitors actual vehicle speed and position, comparing them against the planned control profile. Based on this feedback, the system adjusts the execution of control profile parts and switching points to achieve the desired speed control precision while managing system complexity through adaptive regulation.
3Use of energy by moving object
If the vehicle optimizes speed adjustment for energy efficiency, then the fuel consumption is reduced, but the time to reach target position increases
Solution Approach 1:
The control profile is determined in advance to optimize the balance between energy efficiency and time consumption. The method calculates the optimal speed trajectory that considers both fuel-efficient acceleration/deceleration patterns and the time required to reach target positions. This preliminary optimization ensures that the vehicle minimizes energy consumption while maintaining acceptable travel times.
Solution Approach 2:
The system adjusts control parameters within the profile, such as acceleration rates and switching point timing, to optimize the trade-off between energy efficiency and time consumption. By dynamically modifying these parameters based on traffic conditions and target requirements, the system achieves fuel-efficient operation without excessive delays in reaching targets.
Data Source
AI summary
A method for adjusting the speed of a vehicle (EGO) moving with an initial speed to a target speed, including: determining a control profile comprising at least one control profile part, in which the control profile includes at least one control parameter for the vehicle (EGO) and allowing the vehicle (EGO) to change its speed from the initial speed to the target speed, and adjusting the speed of the vehicle (EGO) according to the control profile. A further method is disclosed for leading a vehicle (EGO) that is moving on a lane into a target position with respect to at least one other vehicle, in which the method is used to adjust the speed of the vehicle (EGO) to reach the target position. Also described are a related device, a system, a vehicle, a computer program product and a storage medium.