Vehicle Steering Control via Frequency-Based Torque Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems face challenges in maintaining optimal turning performance and stability, particularly at high steering frequencies, leading to discrepancies between driver intent and vehicle response, and fail to selectively control turn assist and stability performance based on road surface conditions.
Innovation Solution
An apparatus and method that adjust power steering assistance and perform driving force control based on frequency-related data from steering inputs, using a power steering adjuster and steering stability controller to calculate and apply correction gains for steering angle and yaw rate, allowing for adaptive control of vehicle behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If power steering assistance is reduced at high steering frequencies to prevent deterioration in steering feeling, then steering stability is improved, but turning performance deteriorates
Solution Approach 1:
The power steering control apparatus dynamically adjusts the steering angle characteristic based on the detected steering frequency. When high-frequency steering is detected, the system increases the steering angle characteristic to compensate for reduced turning performance, while maintaining stability through frequency-based adaptive control
Solution Approach 2:
The system changes the steering angle characteristic parameter according to the steering frequency. By detecting the steering frequency and adjusting the steering angle characteristic accordingly, the system resolves the contradiction between steering stability and turning performance through parameter adaptation
2Stability of the object's composition
If viscous torque is increased to stabilize vehicle behavior on low μ road surfaces, then steering stability improves, but control responsiveness deteriorates
Solution Approach 1:
The system dynamically adjusts the viscous torque parameter based on detected steering frequency and vehicle operating conditions. By changing the viscous torque parameter adaptively, the system maintains vehicle stability on low μ surfaces while preserving control responsiveness through frequency-based parameter modification
Solution Approach 2:
The viscous torque is dynamically adjusted based on steering frequency detection. The system transitions from fixed viscous torque control to dynamic adjustment, allowing the viscous torque to vary with steering frequency to maintain both stability and responsiveness
3Productivity
If steering angle characteristic is increased to improve turning performance, then vehicle response improves, but steering stability deteriorates
Solution Approach 1:
The system adjusts the steering angle characteristic parameter based on detected steering frequency. By increasing the steering angle characteristic only when high-frequency steering is detected, the system improves turning performance during rapid steering while maintaining stability during normal low-frequency steering operations
Data Source
AI summary
An apparatus for controlling a vehicle includes a power steering adjuster that adjusts an amount of an assistance in a steering to be provided by a power steering in accordance with a change in a state quantity related to an ease of a steering, and a steering stability controller that controls a control amount to perform a driving force control on a wheel of a vehicle in accordance with the change in the state quantity.