Steer-by-wire feedback actuator for vehicle oscillation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Steer-by-wire vehicles lack natural steering feel due to the absence of a direct mechanical connection between the steering wheel and the wheels, resulting in attenuated feedback of vehicle oscillations.
Innovation Solution
A steering device with a controller that measures natural vehicle oscillations and applies them to a feedback actuator with corresponding amplitude, enhancing the natural steering feel by providing attenuated feedback of vehicle oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steer-by-wire system is implemented without mechanical connection between steering wheel and wheels, then steering system reliability and precision are improved, but driver feedback about vehicle oscillations is attenuated and steering feel becomes unnatural
Solution Approach 1:
The patent implements a feedback mechanism where vehicle oscillations are measured by sensors and fed back to the steering wheel through an actuator. The controller detects oscillations from various vehicle components (engine, transmission, wheels) and applies corresponding feedback forces to the steering wheel, restoring natural steering feel while maintaining the reliability benefits of the steer-by-wire system.
Solution Approach 2:
The patent introduces an intermediary feedback actuator that mediates between the vehicle's mechanical oscillations and the steering wheel. This actuator generates artificial feedback forces based on measured vehicle oscillations, allowing the driver to perceive natural steering feel without direct mechanical connection to the wheels.
2Extent of automation
If direct mechanical connection between steering gear and steering wheel is omitted, then steering system precision and automation are improved, but natural feedback of vehicle oscillations to driver is lost
Solution Approach 1:
The system uses feedback to capture vehicle oscillations from multiple sources (engine, transmission, wheels) and reproduce them at the steering wheel. This allows the automated steer-by-wire system to maintain full automation while preventing information loss about vehicle dynamics by actively feeding oscillation data back to the driver.
Solution Approach 2:
The patent replaces the direct mechanical connection with an electronic feedback system. Instead of mechanical transmission of oscillations through a direct connection, the system uses sensors, controllers, and actuators to electronically detect and reproduce vehicle oscillations, maintaining automation while preserving oscillation information.
Data Source
AI summary
A steering device for a motor vehicle, in particular a “steer-by-wire” steering device, comprises a steering wheel, which is able to act on a steering sensor for measuring the rotation angle position of the steering wheel, an electromechanical actuator, which is able to act on a rack for steering wheels, and an electronic controller, which is adapted to detect the steering wheel angle position and to control the electromechanical actuator, wherein the steering device further comprises a feedback actuator acting on the steering wheel, wherein the controller is adapted to measure natural oscillations of the motor vehicle and to apply them with a corresponding amplitude to the feedback actuator.