EV Speed Control Torque Mapping Across Vehicle Architectures
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Solution Overview
Problem
Existing speed control systems for vehicles, particularly in adaptive cruise control systems, require vehicle-specific calibration and are challenging to implement across different vehicle architectures, especially in advanced autonomy levels.
Innovation Solution
A modular approach to vehicle speed control, where a modular autonomy control module determines target vehicle acceleration based on following distance, speed, or target speed, and outputs this to a vehicle dynamics module, which maps the acceleration to a torque request applicable to various vehicle types without needing specific calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional speed control system is implemented with vehicle-specific calibration, then the control precision for that specific vehicle type is improved, but the complexity of implementation across different vehicle architectures increases
Solution Approach 1:
The autonomy control module is designed with universal functionality to work across multiple vehicle architectures without requiring vehicle-specific calibration. The module receives sensor inputs and determines target acceleration based on following distance, speed, or target speed, then outputs torque requests that can be applied to various vehicle types through a standardized interface.
Solution Approach 2:
The control system is segmented into distinct functional modules: an autonomy control module that determines target acceleration based on sensor inputs and control parameters, and a vehicle dynamics module that maps acceleration to torque requests. This segmentation allows each module to be optimized independently while maintaining overall system compatibility across different vehicle architectures.
2Ease of manufacture
If a modular autonomy control module is used without vehicle-specific calibration, then the ease of implementation across different vehicle types is improved, but the manufacturing precision of speed control may deteriorate
Solution Approach 1:
The autonomy control module provides universal speed control functionality that can be implemented across different vehicle types without vehicle-specific calibration. The module determines target acceleration based on sensor inputs and outputs torque requests through a standardized interface that works with various vehicle architectures.
Solution Approach 2:
The modular autonomy control module is designed to be self-configuring and self-adapting to different vehicle types through standardized interfaces. The system automatically determines target acceleration and torque requests based on sensor inputs and control parameters without requiring external calibration procedures.
Data Source
AI summary
Example methods and systems for controlling speeds of a vehicle may generally determine a target vehicle acceleration using an autonomy control module of the vehicle. The target vehicle acceleration may be determined based upon at least one of a target vehicle following distance, a target vehicle following speed, or a target vehicle speed. The determined vehicle acceleration may be mapped to a level of vehicle torque using a vehicle dynamics module of the vehicle. Additionally, the level of vehicle torque may be applied to one or more wheels of the vehicle.