Active Steering Safety System for Collision Avoidance
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Solution Overview
Problem
Current active steering systems for vehicles fail to adequately account for adjacent obstacles and lane conditions, such as friction coefficient and width, which can lead to unsafe lane changes and increased occupant discomfort during collision avoidance maneuvers.
Innovation Solution
An active steering system equipped with sensors and a control module that calculates a steering profile to perform a lane change maneuver while ensuring the vehicle does not exceed occupant comfort thresholds and does not cross the outer boundary of the adjacent lane, by considering the relative distances and velocities of leading and adjacent obstacles, as well as the friction coefficients and widths of lanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If active steering systems execute abrupt lane changes to avoid collisions, then response time is improved, but occupant comfort is worsened due to excessive acceleration
Solution Approach 1:
The system applies dynamics by continuously adjusting the steering profile during the lane change maneuver. The control module calculates optimal steering angles that vary over time, balancing the need for quick response with the constraint of maintaining acceleration within comfortable limits. This dynamic adjustment allows the vehicle to respond promptly to leading obstacles while minimizing occupant discomfort through smooth, calculated motion profiles.
2Device complexity
If active steering systems use simplified lane change models, then system complexity is reduced, but measurement precision is worsened due to failure to account for lane friction and width
Solution Approach 1:
The system applies preliminary action by pre-calculating the steering profile before executing the lane change maneuver. The control module uses stored lane parameters (friction coefficients, width, boundary positions) to compute the optimal steering angles in advance, ensuring precise account of lane conditions without adding complex real-time calculation requirements during the actual maneuver.
Data Source
AI summary
The present teachings provide for an active steering system for controlling a vehicle. The system can include at least one sensor and a control module. The at least one sensor can be configured to detect a leading obstacle. The control module can be configured to receive a signal from the at least one sensor, to determine a steering profile, and to execute a lane change maneuver based on the steering profile. The steering profile can include a plurality of steering angles and corresponding vehicle positions for maneuvering the vehicle from a current lane to an adjacent lane. The steering angles can be calculated to not increase the acceleration of the vehicle above an occupant comfort threshold value and to not cause the vehicle to cross an outer boundary of the adjacent lane.