Removable Autonomous Driving System With Standstill-Only Shift Changes
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Solution Overview
Problem
Existing vehicle platforms lack the ability to appropriately perform vehicle control in response to commands from an autonomous driving system, particularly during shift changes, which can lead to unstable vehicle operation when traveling.
Innovation Solution
The vehicle platform is configured to perform shift changes only when the vehicle is at a standstill, based on signals indicating the autonomous mode and the vehicle's moving direction, and may include additional commands for acceleration or deceleration to ensure stable control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vehicle platform performs shift changes in response to commands from the autonomous driving system while the vehicle is traveling, then the autonomous driving function can be fully utilized, but the vehicle may travel unstably and shift changes may become difficult to perform
Solution Approach 1:
The system applies preliminary anti-action by detecting the vehicle's moving state before executing a shift change command. When the vehicle is detected to be in motion, the shift change command is inhibited from being executed, thereby preventing the harmful effect of unstable vehicle travel during shift changes. This preliminary detection and conditional blocking ensures that shift changes only occur when the vehicle is stationary, maintaining reliability while preserving autonomous driving functionality.
2Device complexity
If the autonomous driving system issues shift change commands without considering vehicle motion state, then the autonomous driving control can be simplified, but the vehicle control reliability deteriorates
Solution Approach 1:
The system implements feedback by continuously monitoring the vehicle's moving state (stationary or in motion) and using this information to determine whether to execute shift change commands. The moving state detection unit provides real-time feedback to the shift change control unit, which adjusts its behavior based on the current state. This feedback mechanism maintains simple autonomous driving control logic while ensuring reliable shift changes by preventing execution during vehicle motion.
Data Source
AI summary
A vehicle comprises an autonomous driving system and a vehicle platform that controls the vehicle in response to a command received from the autonomous driving system. In the vehicle, when a first signal indicates an autonomous mode, the vehicle platform performs a shift change requested through a first command only while the second signal indicates a standstill.