Independent Wheel Control for Rollover Prevention
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Solution Overview
Problem
Conventional steering and braking systems in vehicles often lack sufficient operational flexibility and safety, particularly in situations involving lateral forces that can lead to rollover or maneuvering challenges such as cornering and parking.
Innovation Solution
A wheel control system that independently controls the steering, camber, and braking of individual wheels based on real-time sensors and threshold conditions to mitigate lateral forces and enhance stability, including the use of separate steering assemblies for the front and rear wheels and a braking system to manage rollover prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional steering and braking systems are used, then the vehicle can perform basic maneuvering and stopping, but the system lacks sufficient operational flexibility and safety when subjected to lateral forces
Solution Approach 1:
The steering system is divided into separate steering assemblies for front wheels and rear wheels, allowing independent control of each wheel's steering angle. This segmentation enables the system to adapt to different maneuvering requirements and improve safety by independently responding to lateral forces on different sides of the vehicle.
Solution Approach 2:
The system dynamically adjusts wheel parameters (steering angle, camber angle) based on real-time sensor feedback regarding lateral forces and vehicle state. This dynamic adaptation allows the vehicle to maintain stability and safety under varying operational conditions while preserving maneuverability.
2Reliability
If independent control of individual wheels is implemented, then enhanced safety and rollover prevention are achieved, but the system complexity increases
Solution Approach 1:
The wheel control system integrates multiple functions into a unified control architecture that manages steering, camber adjustment, and braking operations through a single controller. This multi-functionality reduces overall system complexity despite the advanced capabilities provided by independent wheel control.
Solution Approach 2:
The system incorporates sensors that continuously monitor lateral forces, vehicle attitude, and wheel parameters, feeding this information back to the controller. This feedback mechanism enables automatic adjustment of wheel parameters to prevent rollover, achieving enhanced safety without requiring complex manual intervention systems.
3Ease of operation
If wheel parameters are precisely adjusted for cornering stability, then maneuverability is improved, but the control system complexity increases
Solution Approach 1:
The wheel control system automatically adjusts steering and camber parameters based on sensor feedback without requiring direct operator intervention. The system serves itself by autonomously optimizing wheel parameters for cornering stability, simplifying the operator's task while maintaining precise control.
Solution Approach 2:
The system proactively adjusts wheel parameters in anticipation of cornering conditions based on sensor data about lateral forces and vehicle state. By performing preliminary adjustments before critical cornering situations arise, the system achieves smooth, stable cornering without requiring complex real-time reaction mechanisms.
Data Source
AI summary
An over actuated system capable of controlling wheel parameters, such as speed (e.g., by torque and braking), steering angles, caster angles, camber angles, and toe angles, of wheels in an associated vehicle. The system may determine the associated vehicle is in a rollover state and adjust wheel parameters to prevent vehicle rollover. Additionally, the system may determine a driving state and dynamically adjust wheel parameters to optimize driving, including, for example, cornering and parking. Such a system may also dynamically detect wheel misalignment and provide alignment and/or corrective driving solutions. Further, by utilizing degenerate solutions for driving, the system may also estimate tire-surface parameterization data for various road surfaces and make such estimates available for other vehicles via a network.