EPS Control via Vehicle Configuration Code for LKA Interface Compatibility
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Solution Overview
Problem
Current Electric Power Steering (EPS) and Lane Keeping Assist (LKA) systems require separate application software to switch between angle and torque interfaces, leading to high development costs and inefficiencies due to incompatibility during the development process.
Innovation Solution
An EPS control method that acquires expected control signals from the LKA system, performs compatibility verification based on vehicle configuration codes, and obtains a target torque value to control assist motor steering, allowing for compatibility across different interface types without the need for multiple software versions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate application software is developed for angle interface and torque interface, then compatibility with different LKA systems is achieved, but software development cost and complexity increase
Solution Approach 1:
The EPS system is designed with a universal application software that can handle both angle interface and torque interface through a unified processing framework. The system uses a vehicle configuration code to identify the interface type and routes the expected control signal through appropriate processing paths, eliminating the need for separate software versions while maintaining compatibility with different LKA systems.
Solution Approach 2:
The system changes the parameter of interface type recognition by introducing a vehicle configuration code that identifies whether the LKA system uses angle interface or torque interface. Based on this parameter identification, the system dynamically adjusts its processing mode within the same application software, allowing flexible adaptation without requiring separate software versions.
2Adaptability or versatility
If multiple versions of application software are developed for different vehicle configurations, then specific configuration requirements are met, but development efficiency decreases
Solution Approach 1:
A single universal application software version is developed that can adapt to different vehicle configurations through the vehicle configuration code. The software contains integrated processing logic for both angle interface and torque interface, allowing it to serve multiple configuration requirements without requiring multiple software versions, thereby significantly improving development efficiency.
Solution Approach 2:
The system implements dynamic configuration adaptation by reading the vehicle configuration code at runtime and adjusting the processing mode accordingly. This dynamic approach allows the same software to adapt to different vehicle configurations without requiring static compilation of multiple versions, enhancing both adaptability and development efficiency.
3Ease of operation
If angle interface is used for LKA-EPS interaction, then steering wheel angle control is achieved, but compatibility with torque-based control systems is lost
Solution Approach 1:
The system uses the vehicle configuration code to identify the interface type parameter and dynamically switches between angle interface processing and torque interface processing modes. When angle interface is detected, the system processes expected angle signals for steering wheel angle control; when torque interface is detected, it processes expected torque signals, thereby achieving both specialized control and broad compatibility within a single software framework.
Data Source
AI summary
An electric power steering control method. Said method comprises the following steps executed by an EPS system: acquiring an expected control signal sent by an LKA system, the expected control signal comprising an expected angle signal or an expected torque signal; on the basis of vehicle configuration codes, performing compatibility verification on the expected control signal, and acquiring a compatibility verification result; and if the compatibility verification result indicates being compatible, acquiring a target torque value according to the expected control signal, and controlling steering of a power-assisted motor on the basis of the target torque value. Said method uses vehicle configuration codes to perform compatibility verification on expected control signals corresponding to different interface types, and when a compatibility verification result indicates being compatible, controls the operation of a power-assist motor according to a target torque value determined by the expected control signal.