Vehicle Braking Distance Smoothing via Corrected Trajectory Profiles
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Solution Overview
Problem
Existing methods for maneuvering motor vehicles face challenges in reliably determining the distance to go before the braking system is activated, leading to unsteady braking due to fluctuations in the information distance and collision distance, which can be affected by changes in trajectory and detected objects.
Innovation Solution
A method that continuously determines a corrected reference distance and collision distance based on time profiles, smoothing out fluctuations and jumps to provide a stable distance-to-go for the braking system, ensuring reliable activation and preventing unsteady braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the remaining distance is determined based on indication distance and collision distance, then the braking system can be controlled during maneuvering, but the remaining distance fluctuates greatly causing unsteady braking
Solution Approach 1:
The patent applies preliminary action by determining a corrected indication distance in advance based on the current indication distance and previously determined corrected indication distances. This smoothing process prepares a stabilized distance value before it is used for braking control, preventing the fluctuations that cause unsteady braking while maintaining reliable braking activation.
2Loss of information
If the indication distance is used to determine the remaining distance, then the distance to turning point can be calculated, but the indication distance changes over time causing distance-to-go fluctuations
Solution Approach 1:
The patent implements feedback by continuously determining corrected indication distances based on current indication distances and previously determined corrected values. This creates a feedback loop that smooths out fluctuations in the distance-to-go signal by comparing current measurements with historical data, thereby improving reliability while preserving trajectory information.
3Measurement precision
If the collision distance is determined as a function of current trajectory and detected objects, then the distance to objects can be measured, but the stability of detected objects causes collision distance changes
Solution Approach 1:
The patent applies preliminary action by smoothing the collision distance determination through the corrected collision distance calculation. Before using the collision distance for braking control, it is processed to remove fluctuations caused by object detection instability, ensuring that precise measurements are maintained while stability is improved.
Data Source
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AI summary
The invention relates to a method for maneuvering a motor vehicle (1), wherein a trajectory for maneuvering the motor vehicle (1) is determined and, during the maneuvering of the motor vehicle (1) along the trajectory, a distance to notification (DTH), which describes a distance to a turning point of the trajectory, and a distance to collision (DTC), which describes a distance to an object (8) in an environment (7) of the motor vehicle (1), are determined and a remaining distance (R) until activation of a brake system of the motor vehicle (1) is determined on the basis of the distance to notification (DTH) and the distance to collision (DTC), wherein a corrected distance to notification (DTHk) is continuously determined on the basis of changes in the time curve of the distance to notification (DTH), a corrected distance to collision (DTCk) is continuously determined on the basis of changes in the time curve of the distance to collision (DTC), and the remaining distance (R) is determined on the basis of the corrected distance to notification (DTHk) and the corrected distance to collision.