Steering Torque Control for Manual Return to a Preset Route
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems fail to prevent vehicles from deviating from a preset operation route during manual driving, particularly in areas where autonomous driving is not available, leading to potential delays and incorrect route selection.
Innovation Solution
A vehicle controller and method that generates steering torque to guide the vehicle back to the preset route during manual driving, while allowing driver intervention without immediate resistance, and switches driving modes to prevent unintended route deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steering torque is generated to guide the vehicle back to the preset route during manual driving, then the vehicle is prevented from deviating from the operation route, but the driver's intentional steering intervention is restricted
Solution Approach 1:
The steering torque generation is made dynamic by adjusting it based on the magnitude of steering operation detected by the steering operation detection unit. When the driver performs large steering operations indicating intentional intervention, the torque is reduced or canceled, allowing driver intent to override the route guidance. This dynamic adjustment resolves the contradiction by adapting the level of steering assistance to the driver's actual needs.
Solution Approach 2:
The system changes the parameter of steering torque magnitude based on detected steering operation characteristics. By monitoring steering angle changes and determining whether they represent routine lane adjustments or intentional route changes, the system adjusts the torque parameter accordingly, enabling both route adherence and driver freedom under different operating conditions.
2Reliability
If steering torque is continuously generated to maintain the vehicle on the preset route, then route deviations are minimized, but steering resistance that disturbs driver intention is created
Solution Approach 1:
The system applies preliminary anti-action by generating steering torque only when necessary to prevent route deviations, rather than continuously. The steering operation detection unit monitors driver inputs and suppresses torque generation when the driver's steering actions indicate intentional route changes, thereby preventing harmful steering resistance from opposing driver intention.
Solution Approach 2:
The system uses feedback from the steering operation detection unit to continuously monitor driver steering behavior and adjust torque generation in real-time. When feedback indicates the driver is making intentional steering interventions, the system reduces or cancels torque generation, eliminating harmful resistance. This closed-loop feedback mechanism ensures route adherence only when it does not conflict with driver intention.
3Adaptability or versatility
If the vehicle allows manual driving mode for driver intervention, then driving flexibility is improved, but the vehicle may travel toward roads deviating from the operation route
Solution Approach 1:
The steering control unit serves multiple functions: it provides route guidance torque to maintain adherence to the preset operation route, and simultaneously detects and responds to driver steering operations to allow intentional route changes. This multi-functionality enables the system to maintain both route accuracy and driving flexibility within a single integrated control mechanism.
Solution Approach 2:
The system performs preliminary action by establishing the preset operation route in advance and continuously comparing actual vehicle position against this predefined path. The steering torque is proactively generated to guide the vehicle back toward the route before significant deviations occur, while the detection mechanism is prepared to immediately suppress this torque when driver intervention is detected, thus maintaining both route accuracy and flexibility.
Data Source
AI summary
The vehicle controller of the present disclosure acquires a preset operation route, and causes the vehicle to travel along the preset operation route in one of an autonomous driving mode and a manual driving mode. The autonomous driving mode is a mode in which the vehicle is operated by autonomous driving. The manual driving mode is a mode in which the vehicle is operated by manual driving in which at least steering is manually performed. The vehicle controller of the present disclosure generates steering torque in a direction of returning the vehicle to the preset operation route in response to detection of steering toward a road deviating from the preset operation route during operation in the manual driving mode.