Vehicle Remaining Distance Control for Comfortable Precise Stopping
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Solution Overview
Problem
Existing vehicle control systems struggle with inconsistent and uncomfortable braking during automated maneuvers due to scatter in remaining distance control, leading to unnecessary hard braking and deviations from the desired stopping position.
Innovation Solution
A method for closed-loop control of a vehicle's remaining distance that selectively switches between a comfort mode and a high-precision mode based on the current situation, using a list of specified situations to determine the appropriate mode for each maneuver, incorporating factors like maneuver performance accuracy, clearance, and surface conditions to mimic human driving behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single remaining distance control mode is used for all maneuvers, then the control system is simple, but the braking comfort and precision deteriorate due to inconsistent braking actions
Solution Approach 1:
The system dynamically selects between comfort mode and high-precision mode based on the current maneuver situation. The remaining distance control is performed in comfort mode for standard maneuvers to ensure braking comfort, and switched to high-precision mode for maneuvers requiring higher precision, such as when maneuver performance accuracy is insufficient or clearance is limited. This dynamic adaptation resolves the contradiction by providing comfortable braking when possible while maintaining the ability to switch to precision mode when needed.
Solution Approach 2:
The system changes the control parameters by selecting different modes (comfort mode with higher tolerance for remaining distance variations vs. high-precision mode with stricter control). The mode selection is based on parameters such as maneuver performance accuracy, clearance to obstacles, and surface conditions. This parameter change allows the system to optimize braking comfort in suitable situations while ensuring precision when required.
2Manufacturing precision
If high-precision mode is used for all maneuvers, then stopping precision is improved, but user comfort deteriorates due to frequent hard braking actions
Solution Approach 1:
The system dynamically adjusts the control precision based on the maneuver situation. For maneuvers with sufficient maneuver performance accuracy and adequate clearance, the system uses comfort mode which allows smoother braking and better user comfort. For maneuvers requiring higher precision (e.g., limited clearance, poor maneuver accuracy), the system switches to high-precision mode. This dynamic adjustment ensures high stopping precision is only applied when necessary, avoiding unnecessary hard braking and maintaining user comfort.
Solution Approach 2:
The control parameter (mode selection) is changed based on the maneuver characteristics. Comfort mode is selected when parameters such as clearance and maneuver accuracy indicate sufficient margin, providing smoother braking. High-precision mode is selected when parameters indicate tighter constraints, ensuring accurate stopping. This parameter-based selection resolves the contradiction by matching precision level to actual maneuver requirements.
3Adaptability or versatility
If mode selection is based on multiple factors, then adaptability to different driving scenarios is improved, but system complexity increases
Solution Approach 1:
The system evaluates multiple parameters (maneuver performance accuracy, clearance to obstacles, surface conditions such as pitch) to determine the appropriate mode. These parameters are assessed against predefined criteria to select between comfort mode and high-precision mode. This multi-parameter evaluation approach provides high adaptability to different driving scenarios while keeping the system structure manageable through clear parameter-based decision rules.
Solution Approach 2:
The situation evaluation is segmented into discrete factors (maneuver performance accuracy, clearance, surface conditions) that are evaluated independently and combined to determine mode selection. This segmentation makes the complex evaluation process more manageable by breaking it down into distinct assessable components, each with clear evaluation criteria.
Data Source
AI summary
A method for closed-loop control of a remaining distance for a vehicle to stop the vehicle at a specified stopping position is used in a maneuver in which the vehicle is guided to the specified stopping position in several maneuver moves. The individual maneuver moves each end in a target position where the vehicle is to be stopped. A current situation is determined considering an already performed maneuver move. Depending on the specific current situation, a selection is made as to whether the vehicle is to be operated in the comfort mode or in the high-precision mode. The selection is based on a comparison of the current situation with a list of specified situations. It is predetermined in the list for each of the specified situations, whether the remaining distance control is to be carried out in the comfort mode or in the high-precision mode in the respective situation.