Active Steering Torque Compensation for Natural Feel
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Solution Overview
Problem
Active steering systems in vehicles influence the steering feel of the driver, and there is a need to limit this influence to enhance the driving experience.
Innovation Solution
A method and system that involve a driver-initiated manual primary steering intervention, followed by automatic secondary and tertiary steering interventions by the active steering module, which calculate and adjust the steering wheel angle and torque to compensate for the effects of these interventions, ensuring the steering feel is not negatively affected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an active steering system with automatic steering modules is implemented, then the steering automation and vehicle control capability are improved, but the steering wheel torque and angle are influenced by automatic interventions, deteriorating the natural steering feel for the driver
Solution Approach 1:
The system calculates the anticipated secondary steering reaction before it occurs and applies a compensating tertiary steering intervention to counteract its effect on the steering wheel. This preliminary anti-action prevents the automatic steering interventions from being perceived by the driver, maintaining natural steering feel while preserving automation benefits
Solution Approach 2:
The controller acts as an intermediary between the automatic steering modules and the steering wheel. It calculates compensating torques and angles that mediate the interaction, allowing automatic steering interventions to occur while blocking their perceptible effect on the driver through the steering wheel
2Object-affected harmful factors
If compensating steering interventions are calculated and applied, then the steering feel is maintained, but the system complexity increases due to additional calculation and control steps
Solution Approach 1:
The controller integrates multiple functions into a unified control process: it monitors primary steering interventions, calculates secondary steering reactions, computes anticipated tertiary compensating interventions, and applies corrections all through a single control unit. This merging reduces overall system complexity despite the sophisticated compensation algorithm
3Object-affected harmful factors
If the tertiary steering intervention is applied to compensate for automatic steering effects, then the steering feel is preserved, but the time required for processing and response increases
Solution Approach 1:
The system calculates the anticipated secondary steering reaction in advance before the actual intervention occurs. By performing this calculation preliminarily and continuously monitoring steering parameters, the system minimizes processing delays when applying compensating tertiary interventions, reducing perceived response time
Data Source
AI summary
A method for steering a vehicle, having a front axle with steerable wheels, a rear axle with steerable wheels, having a steering system including as its components a steering wheel operable by the driver and at least one automatic steering module, wherein a manual primary steering intervention is undertaken by the driver of the vehicle for the steering wheel, on the basis of which a manual primary steering reaction occurs for the wheels of the front axle, wherein on the basis of the manual primary steering reaction at least one automatic secondary steering intervention is undertaken with the at least one automatic steering module for the wheels of at least one axle.