Vehicle Steering Cue Transmission for Predictive Yaw Perception
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Solution Overview
Problem
There is a time response delay between steering initiation and the actual occurrence of vehicle behavior, causing occupants to feel abrupt lateral acceleration or yaw rate changes, leading to discomfort and anxiety, and existing solutions either compromise vehicle responsiveness or fail to account for varying seating positions.
Innovation Solution
An information transmission apparatus with a parameter detector, vibrator, and gain adjuster that adjusts vibration output based on steering parameters and occupant seating position to predict vehicle behavior through acoustic cues, using vibrators to generate vibrations corresponding to the vehicle's yaw behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the yaw rate gain is lowered to reduce the feeling of abruptness, then the occupant comfort is improved, but the vehicle responsiveness becomes slow
Solution Approach 1:
The patent introduces acoustic information as an intermediary element that mediates between the vehicle's actual behavior and the occupant's perception. The sound field rotation system acts as a mediator that provides predictive cues about upcoming vehicle behavior, allowing the occupant to mentally prepare for lateral acceleration without physically reducing the vehicle's responsiveness. This resolves the contradiction by decoupling the occupant's perceptual experience from the vehicle's actual dynamic response.
Solution Approach 2:
The system performs preliminary action by rotating the sound field in advance of the actual vehicle behavior. The acoustic information is provided before the lateral acceleration occurs, giving the occupant predictive information about the upcoming vehicle response to steering input. This allows the occupant to mentally prepare for the behavior change, reducing the perceived abruptness while maintaining full vehicle responsiveness.
2Device complexity
If same acoustic information is transmitted to all occupants, then the system complexity is reduced, but the effectiveness varies depending on seating position
Solution Approach 1:
The patent applies local quality by adjusting the acoustic information transmission based on the specific seating position of each occupant. The sound field rotation amount is modified according to the distance from the rotation center to the seating position, ensuring that each occupant receives acoustic information that is appropriate for their location. This resolves the contradiction by making the system adaptive to different seating positions while maintaining reasonable complexity through position-based parameter adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances predictability of vehicle behavior for occupants by reducing the feeling of abruptness and ensuring appropriate information transmission regardless of seating position, using Pacinian corpuscles for sensitive frequency response.
Implementation Method 1
a vibrator configured to vibrate air around an occupant based on a predetermined vibration waveform
Data Source
AI summary
An information transmission apparatus configured to be provided on a vehicle that includes a steering device 1 configured to steer a wheel includes a parameter detector, a vibrator, a rotation center calculator, and a gain adjuster. The parameter detector is configured to detect a parameter σ that correlates with a steering amount of the steering device. The vibrator is configured to vibrate air around an occupant based on a predetermined vibration waveform in accordance with a change in the parameter of the steering device. The rotation center calculator is configured to calculate a position of a rotation center of a yaw behavior of a body of the vehicle. The gain adjuster is configured to adjust an output gain of the vibration waveform in accordance with a relative position between the rotation center and a seating position of the occupant.