Integrated Cruise Control Speed Profile Generation
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Solution Overview
Problem
Current cruise control systems are not effectively adapted to handle various situations such as entering or leaving a curve, navigating a curve, and encountering other vehicles, often resulting in jerky transitions between control modes.
Innovation Solution
A cruise control system that integrates curvature speed control, speed limit control, and adaptive speed control, generating an optimized speed profile based on vehicle position, heading, speed limits, and proximity to other vehicles, using sensors like GPS and radar to determine the optimal speed command for the vehicle's throttle/brake controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control modes (adaptive cruise control and curvature speed control) are run in parallel with arbitration, then the system can handle various situations, but the transitions between controls become jerky
Solution Approach 1:
The patent merges multiple control modes (adaptive cruise control, curvature speed control, speed limit control) into a single integrated application. The controller selectively applies different control strategies based on the situation rather than running them in parallel with arbitration, eliminating jerky transitions while maintaining versatility in handling various driving conditions.
2Manufacturing precision
If the system adapts to various situations including curves and traffic, then control accuracy improves, but the system complexity increases
Solution Approach 1:
The patent implements a universal controller that performs multiple functions: it handles adaptive cruise control, curvature speed control, and speed limit control within a single application. This multi-functional approach improves control accuracy across various situations while avoiding the complexity of multiple separate control systems with arbitration logic.
Data Source
AI summary
An exemplary cruise control system includes an application that integrates curvature speed control, speed limit control, and adaptive speed control and generates an optimized speed profile that is used to control the vehicle.