Vehicle Motion Control Using Longitudinal Acceleration for Occupant Stability
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Solution Overview
Problem
Existing vehicle motion control systems face complexity and increased manufacturing costs when attempting to stabilize occupant posture during transient motions like lane changes, as they require mechanical structures to adjust seat positions in response to lateral acceleration.
Innovation Solution
A vehicle motion control method that adjusts longitudinal acceleration to minimize occupant posture changes by setting a corrected longitudinal acceleration based on the steering angle, using sensors and actuators to maintain a stable posture without complex mechanical seat adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mechanical structures are used to adjust seat positions in response to lateral acceleration, then occupant posture stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces the mechanical seat adjustment system with a control system that generates longitudinal acceleration to counteract lateral acceleration effects. Instead of moving the seat mechanically, the system uses the vehicle's existing acceleration capabilities to achieve the same posture stabilization goal, thereby eliminating complex mechanical structures while maintaining occupant stability
Solution Approach 2:
The patent changes the approach from adjusting seat position (spatial parameter) to adjusting vehicle acceleration (dynamic parameter). By controlling longitudinal acceleration based on detected lateral acceleration, the system achieves posture stabilization through dynamic parameter modification rather than mechanical repositioning
2Stability of the object's composition
If mechanical structures are used to adjust seat positions in response to lateral acceleration, then occupant posture stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent eliminates the need for expensive mechanical seat adjustment mechanisms by using control algorithms that leverage the vehicle's existing acceleration systems. This substitution of mechanical components with electronic control reduces manufacturing costs while achieving the same occupant posture stability objective
Solution Approach 2:
The system uses the vehicle's own acceleration capabilities to stabilize the occupant, rather than requiring separate mechanical adjustment systems. The vehicle's existing propulsion and braking systems serve the dual purpose of vehicle motion and occupant posture stabilization, eliminating the need for additional manufactured components
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
This approach effectively stabilizes occupant posture during lane changes by applying a controlled longitudinal acceleration, reducing motion sickness and maintaining the vehicle's original motion purpose without the need for complex mechanical structures.
Implementation Method 1
A direction and a magnitude of the corrected longitudinal acceleration are determined from a viewpoint of suppressing a change in a posture of an occupant of the vehicle in a roll direction
Data Source
AI summary
A vehicle motion control method controls a motion state of a vehicle during a vehicle transient motion in which an acceleration in a lateral direction is generated in the vehicle. The vehicle motion control method includes: setting a corrected longitudinal acceleration for correcting a basic longitudinal acceleration determined in accordance with a required driving force for traveling of the vehicle; and determining a target longitudinal acceleration from the basic longitudinal acceleration and the corrected longitudinal acceleration, and operating a traveling actuator of the vehicle based on the target longitudinal acceleration. A direction and a magnitude of the corrected longitudinal acceleration are determined from a viewpoint of suppressing a change in a posture of an occupant of the vehicle in a roll direction.