Vehicle Control Interface for ADK Brake Intervention
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Solution Overview
Problem
There is a need for an appropriate interface between autonomous driving systems and vehicle platforms to enable effective cooperation, especially when the developers of these systems are different, to facilitate seamless communication and control of vehicle functions such as braking and steering.
Innovation Solution
A vehicle control interface is introduced that serves as a communication bridge between the autonomous driving system and the vehicle platform, processing brake pedal position signals and intervention signals to manage deceleration requests, ensuring compatibility and redundancy in control systems to maintain functionality even in failure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle control interface is introduced to bridge autonomous driving system and vehicle platform, then communication efficiency and control reliability are improved, but device complexity increases
Solution Approach 1:
The vehicle control interface acts as an intermediary component between the autonomous driving system and the vehicle platform. It receives control commands from the autonomous driving system, processes them according to predefined rules (such as determining brake pedal intervention based on deceleration requests), and outputs appropriate signals to the vehicle platform. This mediator approach improves control reliability by ensuring proper signal translation and coordination while managing the complexity through a dedicated interface module.
2Measurement precision
If brake pedal intervention signal is generated based on deceleration request comparison, then autonomous driving control precision is improved, but measurement and control difficulty increases
Solution Approach 1:
The system compares the deceleration request from the autonomous driving system with a predetermined threshold value to determine whether brake pedal intervention is necessary. By changing the control parameter from continuous deceleration control to threshold-based binary decision (intervene/not intervene), the system achieves precise control over the brake pedal operation while simplifying the measurement and control logic. The interface monitors deceleration requests and automatically determines intervention timing based on parameter comparison.
Data Source
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AI summary
A vehicle (1) is a vehicle on which an ADK (3) is mountable. The vehicle (1) includes: a VP (5) that controls the vehicle in accordance with an instruction from the ADK (3); and a VCIB (41) that serves as an interface between the ADK (3) and the VP (5). The VP (5) outputs a brake pedal position signal in accordance with an amount of depression of a brake pedal by a driver, and outputs a brake pedal intervention signal, to the ADK (3) through the VCIB (41). The brake pedal intervention signal indicates that the brake pedal (50) is depressed, when the brake pedal position signal indicates that the amount of depression is larger than a threshold value, and indicates beyond autonomy deceleration of the vehicle (1), when a deceleration request in accordance with the amount of depression is higher than a system deceleration request.