Lane Change Assistance Device Dynamic Time Adjustment
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Solution Overview
Problem
Existing lane change assistance devices often result in excessively large or small steering angles and yaw rates during lane changes, causing discomfort for drivers when the vehicle's position or yaw angle deviates from the lane center before changing lanes.
Innovation Solution
A lane change assistance device that adjusts the change time for lane changes based on the vehicle's yaw angle and lateral position relative to the target lane, using a microcomputer system with sensors and mapping algorithms to control the steering unit, setting shorter change times when approaching the target lane and longer times when farther away, thereby optimizing steering angles and yaw rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a constant change time is used for lane change, then the lane change execution time is predictable and consistent, but the steering angle and yaw rate become excessively large or small when the vehicle position or yaw angle deviates from lane center, causing driver discomfort
Solution Approach 1:
The patent applies dynamics by making the change time variable rather than constant. The control device dynamically adjusts the change time based on the detected lateral position and yaw angle of the vehicle before lane change. When the vehicle is closer to the lane center or has smaller yaw angle, a shorter change time is used; when farther away or with larger yaw angle, a longer change time is used. This dynamic adjustment resolves the contradiction by maintaining execution precision while adapting to different initial conditions to ensure driver comfort.
Solution Approach 2:
The patent changes the parameter of change time based on the vehicle's initial state. By detecting lateral position and yaw angle, the system selects appropriate change time values from multiple candidates. This parameter change approach allows the system to maintain consistent execution precision while adjusting the change time to prevent excessively large steering angles and yaw rates, thereby resolving the contradiction between precision and driver comfort.
2Adaptability or versatility
If the vehicle position or yaw angle deviates from lane center before lane change, then the vehicle has more flexibility in positioning, but the steering angle during lane change becomes excessively large when using constant change time
Solution Approach 1:
The patent changes the change time parameter based on the vehicle's lateral position and yaw angle before lane change. When the vehicle is positioned away from the lane center or has a non-zero yaw angle, the system detects these conditions and selects a longer change time from multiple candidates. This parameter adjustment prevents excessively large steering angles while maintaining the vehicle's positioning flexibility, resolving the contradiction between adaptability and steering control.
3Ease of operation
If a longer change time is used for lane change, then the steering angle and yaw rate become smaller and more comfortable, but the lane change execution time increases and reduces efficiency
Solution Approach 1:
The patent changes the change time parameter dynamically based on the vehicle's initial state rather than using a fixed long duration. By detecting lateral position and yaw angle, the system selects from multiple change time candidates - using shorter times when the vehicle is already well-positioned and longer times only when necessary. This approach maintains driver comfort by preventing excessively large steering angles while preserving lane change efficiency by avoiding unnecessary time extensions.
Solution Approach 2:
The patent applies dynamics by making the change time adaptive rather than statically long. The control device dynamically determines the appropriate change time based on real-time detection of vehicle position and orientation. This dynamic approach ensures comfort by limiting steering angles and yaw rates while maintaining efficiency by using the minimum necessary time for each specific situation, resolving the contradiction between comfort and productivity.
Data Source
AI summary
Disclosed herein is a lane change assistance device, including: a change time setting unit configured to set a change time required for the lane change; a yaw angle acquisition unit configured to acquire a yaw angle of an own vehicle before starting the lane change; and a steering control unit configured to control a steering unit of the own vehicle to perform the lane change in the change time set by the change time setting unit, wherein when the yaw angle acquired by the yaw angle acquisition unit is a yaw angle in a state where the own vehicle approaches a target lane designated during the lane change, the change time setting unit sets the change time shorter than in other states, and when the yaw angle acquired by the yaw angle acquisition unit is a yaw angle in a state where the own vehicle stays away from the target lane, the change time setting unit sets the change time longer than in the other states.