Yaw Rate Controller Intervention for Driver Control
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Solution Overview
Problem
Existing active safety systems in vehicles often lead to a loss of driver control during autonomous accident avoidance maneuvers and may rely on erroneous sensor data, increasing safety concerns.
Innovation Solution
A driver assist arrangement featuring a first yaw rate controller, a hazard evaluation unit, and a second yaw rate controller that intervenes in potentially hazardous situations to enhance yaw rate control, allowing higher lateral acceleration and maintaining driver control by detecting and responding to driver-initiated avoidance maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a system autonomously avoids accidents by intervening in driver control, then accident avoidance capability is improved, but driver control and safety perception deteriorate
Solution Approach 1:
The system dynamically adjusts the level of intervention based on detected driving situations. The second yaw rate controller is configured to intervene only when specific hazardous conditions are met (risk above threshold AND avoidance maneuver detected), allowing the system to transition between autonomous control and driver control modes, thus maintaining both safety and driver agency
Solution Approach 2:
The intervention is applied locally to specific control parameters (yaw rate) rather than complete autonomous control. The system selectively applies brakes of respective wheels to achieve desired yaw rate while leaving other aspects of vehicle control with the driver, maintaining driver control over the vehicle while providing targeted safety assistance
2Speed
If autonomous control is used to avoid accidents, then response speed is improved, but driver confidence and control perception worsen
Solution Approach 1:
The system provides rapid autonomous response only when hazardous conditions are detected (risk above threshold and avoidance maneuver detected), otherwise allowing normal driver control. This dynamic switching maintains driver confidence by preserving control in normal situations while providing fast protective response when needed
3Extent of automation
If the system relies on sensor data for autonomous control, then automation capability is improved, but reliability deteriorates due to erroneous sensor information
Solution Approach 1:
The system continuously monitors driving situations and driver maneuvers through sensors, using this feedback to determine when intervention is appropriate. The hazard evaluation unit and driver intention evaluation unit process sensor data to detect risky situations and driver avoidance maneuvers, providing feedback that triggers or prevents second controller intervention, thus improving reliability through continuous situational awareness
Data Source
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AI summary
A driver assist arrangement (1) is provided comprising a first yaw rate controller (7), a hazard evaluation unit (9) and a driver intention evaluation unit (13). The first yaw rate controller (7) is configured to control a yaw rate of the hosting vehicle (5), by comparing an expected yaw rate with an actual yaw rate and in response thereto selectively apply brakes of respective wheels of the host vehicle (5). The arrangement (1) further comprises a second yaw rate controller (15), configured to intervene in the control of the first yaw rate controller (7), in case the evaluated risk of an accident is above a threshold value and occurrence of an avoidance manoeuvre initiated by the driver (3) is detected. The present invention also relates to a vehicle (5) comprising a driver assist arrangement (1) and a method of assisting a driver (3) of a vehicle (5).