Autonomous Driving Torque Control for Steep Hill Roll-Back Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Autonomous driving systems face challenges on uphill roads with high gradients, leading to potential roll-back phenomena and unnecessary braking impacts, and lack proactive solutions for route avoidance and torque management.
Innovation Solution
An autonomous driving control apparatus identifies hills with gradients exceeding a specific value, recommends alternative routes, adjusts braking force and torque based on vehicle information, and transfers control authority to the user when necessary, using sensors and map data to manage uphill driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the autonomous driving control apparatus stops the host vehicle on hills with gradient greater than or equal to a specified value, then roll-back phenomenon is prevented, but unnecessary braking impact is applied to objects loaded onto the host vehicle and users riding in the host vehicle
Solution Approach 1:
The system changes the gradient threshold parameter from a fixed specified value to a dynamically determined value based on vehicle-specific characteristics (weight, power, gear ratio) and environmental conditions (hill gradient, road surface). This allows the stopping decision to be optimized for each situation, preventing roll-back when necessary while avoiding unnecessary braking impacts.
Solution Approach 2:
The system performs preliminary identification of hill sections with gradients greater than or equal to a determined threshold value before the vehicle reaches them. This allows advance preparation of appropriate control strategies, including selecting optimal braking force levels that prevent roll-back while minimizing impact on passengers and cargo.
2Device complexity
If the autonomous driving control apparatus provides only passive solution by monitoring gradient in real time, then system complexity is reduced, but proactive route avoidance and alternative driving control are not available
Solution Approach 1:
The system performs preliminary identification of hill sections using map data before the vehicle reaches them, enabling proactive route avoidance recommendations to be provided to the user. This allows the system to suggest alternative routes or prepare alternative driving control strategies in advance, rather than merely reacting to real-time gradient changes.
Solution Approach 2:
The system provides feedback to the user through notifications about upcoming hill sections and recommended actions. This two-way communication allows the user to make informed decisions about route selection or control mode transitions, enhancing system adaptability while maintaining relatively simple monitoring architecture.
3Device complexity
If the autonomous driving control apparatus uses uniform braking criterion, then control logic is simplified, but unnecessary braking impact is applied and user comfort is reduced
Solution Approach 1:
The system changes the braking force parameter from a uniform fixed value to a variable value determined by multiple factors including vehicle weight, power characteristics, gear ratio, hill gradient, and road surface conditions. This adaptive approach optimizes braking force to be sufficient for preventing roll-back while minimizing unnecessary impact on passengers and cargo.
Solution Approach 2:
The system applies different braking force levels tailored to specific vehicle characteristics and situational conditions. Rather than using a one-size-fits-all uniform braking criterion, the control logic adjusts braking parameters locally according to the particular vehicle and environmental context, improving user comfort while maintaining safety.
Data Source
AI summary
Disclosed is an autonomous driving control apparatus. The autonomous driving control apparatus includes a sensor device, a driving device, a memory, and a control device. For example, the autonomous driving control apparatus identifies host vehicle information including at least one of a real-time weight of a host vehicle, gear information of the host vehicle, a driving speed of the host vehicle, or a combination of the real-time weight, the gear information, and the driving speed by using the sensor device, identifies required driving torque required to drive on a hill placed on a driving route of the host vehicle through the driving device by using the host vehicle information, and provides a user with route change information, or provides a transition request for control authority for the host vehicle if output available torque of the host vehicle is less than the required driving torque.