Removable Autonomous Driving Kit With Steering Rate Limit Exchange
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Solution Overview
Problem
In vehicles equipped with autonomous driving kits that are attachable and removable, the limit value of the steering rate cannot be appropriately controlled unless it is pre-stored in the kit, limiting adaptability to different vehicles.
Innovation Solution
The autonomous driving kit communicates with the vehicle's steering system to receive and transmit a limit value for the steering rate, allowing the kit to calculate a target steering angle and control the vehicle's steering system accordingly, thereby setting an appropriate steering rate without pre-storing the value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the autonomous driving kit is made attachable and removable for adaptability, then versatility is improved, but the ability to control the steering rate limit value deteriorates because the kit cannot access vehicle-specific parameters
Solution Approach 1:
The patent introduces a vehicle interface box as an intermediary component that mediates between the autonomous driving kit and the vehicle's steering system. The interface box receives the target steering angle from the autonomous driving kit and obtains the vehicle-specific steering rate limit value from the steering system, then integrates these to generate appropriate control instructions. This mediator enables the removable autonomous driving kit to access vehicle-specific parameters without being permanently integrated into the vehicle.
2Adaptability or versatility
If the steering system specifies the limit value dynamically, then adaptability to different vehicles is improved, but the complexity of the control system increases due to additional communication interfaces
Solution Approach 1:
The vehicle interface box is designed as a universal component that can interface with different autonomous driving kits and different vehicle steering systems. It performs multiple functions including receiving target steering angles from the autonomous driving kit, obtaining steering rate limit values from the steering system, calculating appropriate control instructions, and transmitting commands to the steering system. This multi-functional design allows a single interface box to handle various vehicle-kit combinations without requiring custom integration for each pair.
Data Source
AI summary
A vehicle includes an ADK attachable to and removable from a vehicle main body, the ADK issuing an instruction for autonomous driving, a VP including a plurality of functional units that perform a plurality of prescribed functions of the vehicle main body, and a VCIB that issues a control instruction to the functional units in accordance with an instruction from the ADK. One of the plurality of functional units is a steering system that steers the vehicle main body. The steering system specifies a limit value of a steering rate in accordance with a prescribed reference and transmits the specified limit value to the ADK through the VCIB. The ADK calculates a target steering angle to satisfy the limit value received from the steering system and transmits an instruction for the calculated steering angle to the steering system through the VCIB.