Collaborative Vehicle Steering with Weighted ADAS Driver Input
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Solution Overview
Problem
Existing steering systems lack the ability to effectively integrate driver inputs with advanced driver assistance systems (ADAS) for collaborative trajectory tracking, leading to inefficiencies in vehicle control, particularly in dynamic driving conditions.
Innovation Solution
A steering system that incorporates a driver-controllable steering device, a power steering actuator, an ADAS with spatial monitoring and navigation systems, and a steering controller that employs a model predictive controller (MPC) to determine a weighted steering command based on driver inputs and external factors, ensuring seamless integration and adaptive control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driver steering command is processed alone without ADAS integration, then system simplicity is maintained, but vehicle control adaptability and safety are reduced
Solution Approach 1:
The patent merges driver steering commands with ADAS-generated steering commands into a unified collaborative steering control system. The steering controller integrates multiple input sources (driver input, spatial monitoring system, navigation system) to generate a composite steering command, thereby improving vehicle control adaptability while managing system complexity through structured integration.
Solution Approach 2:
The steering controller is designed to handle multiple functions: processing driver steering commands, receiving spatial monitoring data, integrating navigation information, and generating collaborative steering control. This multi-functional approach allows a single controller to manage diverse inputs and achieve adaptive vehicle control without requiring separate dedicated systems for each function.
2Manufacturing precision
If traditional steering control is used without predictive modeling, then real-time responsiveness is maintained, but trajectory tracking precision is reduced
Solution Approach 1:
The patent employs a predictive model within the collaborative steering control to anticipate future vehicle states and trajectory requirements. The spatial monitoring system and navigation system provide advance information about the target path and environmental factors, allowing the controller to prepare and adjust steering commands proactively, thereby improving trajectory tracking precision before deviations occur.
Solution Approach 2:
The system implements feedback mechanisms where the spatial monitoring system continuously monitors the vehicle's actual position and trajectory, compares it with the target path, and feeds this information back to the steering controller. This closed-loop feedback enables real-time adjustments to maintain precise trajectory tracking while managing complexity through systematic information flow.
3Measurement precision
If driver steering command is applied directly without weighting, then response time is reduced, but control accuracy in dynamic conditions is reduced
Solution Approach 1:
The patent applies partial weighting to driver steering commands based on contextual factors such as external environment conditions, vehicle state, and target trajectory requirements. Rather than fully processing or completely ignoring driver inputs, the system selectively weights them in combination with ADAS commands, achieving accurate steering control in dynamic conditions while maintaining reasonable response times through balanced processing.
Data Source
AI summary
A steering system for a vehicle that includes a driver-controllable steering device; a power steering actuator coupled to a steerable vehicle wheel; an advanced driver assistance system (ADAS) including a spatial monitoring system; and a steering controller. A steering control routine determines a target path and a target trajectory for the vehicle based upon an input from the spatial monitoring system; determines a driver steering command; determines external factors related to the target path and the target trajectory; determines a weighting factor for the driver steering command based upon the plurality of external factors; determines a steering angle command based upon the driver steering command, the weighting factor for the driver steering command, the target path, and the target trajectory; and controls the power steering actuator to control the steerable wheel responsive to the steering angle command.