Steering Angle Regulating Device with Compensation Circuit
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Solution Overview
Problem
Existing electromechanical steering systems lack the ability to influence control behavior without an interface, leading to unwanted counter-steering torque and oscillations during cooperative driving, especially when the driver's input is not accounted for.
Innovation Solution
A regulating device with a first controller unit and a compensation control circuit that adjusts steering angle information based on driver input and driving conditions, using feedback paths and control elements like dead zones, low-pass filters, and limiters to mitigate these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an integrating regulating component is used in the steering angle regulation, then the regulating behavior is improved and transverse forces are compensated, but unwanted counter-steering torque builds up during cooperative driving
Solution Approach 1:
The patent implements a feedback mechanism where the actual steering angle is continuously measured and compared with the target steering angle. The control difference is fed back to the regulating device, which adjusts the actuator's output torque in real-time to compensate for deviations caused by the integrating component, thereby preventing unwanted counter-steering torque buildup.
Solution Approach 2:
The patent modifies the control parameters of the regulating device by introducing a scaling factor that adjusts the influence of the integrating component based on driving conditions. This dynamic parameter change allows the system to reduce the integrating component's effect during cooperative driving while maintaining its benefits during normal operation.
2Stability of the object's composition
If the control behavior is adjusted depending on driving conditions, then oscillating steering movements are reduced and cooperative driving is improved, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a single regulating device that can operate in different modes (autonomous driving, cooperative driving, manual driving) without requiring separate control systems. The device automatically adapts its control behavior based on the detected driving mode, achieving multi-functionality while avoiding additional system complexity.
Solution Approach 2:
The regulating device automatically detects the driving condition and adjusts its own control parameters without external intervention. The system self-regulates by monitoring the control difference between actual and target steering angles and autonomously modifying the integrating component's influence, eliminating the need for complex external control interfaces.
3Device complexity
If no interface is provided for influencing control behavior, then the device complexity is reduced, but the ability to compensate for unwanted control behavior depends on driving situation is lost
Solution Approach 1:
The regulating device autonomously adapts its control behavior by continuously monitoring driving conditions and automatically adjusting the integrating component's influence. The system detects whether it is in autonomous or cooperative driving mode and self-regulates without requiring external interfaces or manual intervention, thereby maintaining adaptability while keeping the device simple.
Solution Approach 2:
The patent implements an internal feedback mechanism where the control difference between actual and target steering angles is continuously measured and used to automatically adjust the regulating behavior. This feedback loop enables the system to adapt to different driving situations without external interfaces, as the feedback signal itself carries information about the driving condition.
Data Source
AI summary
A regulating device for regulating the steering angle of a vehicle includes a first controller unit having at least one integrating component and configured to receive a control difference between first steering angle information, which is deduced from nominal steering angle information, and an actual steering angle. The first controller unit provides actuation information for a motor operating the steering. A compensation control circuit superposed on the first controller unit is provided. The compensation control circuit has a feedback path receives actuation information of the motor, the output torque of the motor, and/or information dependent on the output torque of the motor as the input variable and, based on the input variable, provides steering angle compensation information.