Vehicle Speed Playback Control for Tailgating Prevention
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Solution Overview
Problem
Existing adaptive cruise control (ACC) systems for motor vehicles are not economical and comfortable, as they rely on complex digital maps and high-resolution sensors, and fail to prevent tailgating effectively.
Innovation Solution
A control system that uses a recording mode to capture and store operating and surroundings data, allowing for predictive speed control by adjusting acceleration and speed based on stored data, without requiring digital maps or high-resolution sensors, and interrupts playback mode when the time interval with a preceding vehicle falls below a predefined threshold, ensuring safe distance and driver comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital maps and high-resolution sensors are used for adaptive cruise control, then measurement precision and reliability are improved, but device complexity and cost increase
Solution Approach 1:
The system records and stores driving data (operating data and surroundings data) during a recording mode, then plays back this recorded data to control vehicle speed and acceleration. This copying approach replaces the need for complex digital maps and high-resolution sensors, as the pre-recorded data serves as a simplified representation of the route characteristics and surrounding conditions.
Solution Approach 2:
The system performs preliminary recording of driving data and route characteristics during a first drive through a route. This preliminary action stores the necessary information in advance, eliminating the need for complex real-time processing and high-resolution sensing during subsequent drives, thereby reducing system complexity while maintaining precision.
2Reliability
If complex ACC control systems are implemented, then speed control reliability is improved, but ease of operation deteriorates due to limited driver control
Solution Approach 1:
The system dynamically switches between different operational modes (recording mode and playback mode) and allows dynamic adjustment of playback parameters such as time offset and speed scale factor. This dynamic capability enables the system to adapt to different driving situations and driver preferences, maintaining reliability while improving ease of operation.
Solution Approach 2:
The system incorporates feedback mechanisms where the recorded operating data (including actual driver actions) is used to adjust and refine the playback control. This feedback loop ensures that the automated control aligns with the driver's preferred driving style and maintains reliability while preserving driver control flexibility.
3Productivity
If ACC systems use predefined routes and profiles, then productivity is improved, but adaptability deteriorates when routes or conditions change
Solution Approach 1:
The system performs preliminary recording of route characteristics and driving conditions during a first drive, storing this data for later playback. This preliminary action creates a reusable profile that improves productivity on subsequent drives while maintaining adaptability through parameter adjustment capabilities.
Solution Approach 2:
The system allows changes to playback parameters such as time offset, speed scale factor, and acceleration profiles. These parameter changes enable the system to adapt to different driving conditions, vehicle states, and driver preferences while maintaining the productivity benefits of predefined routes, even when conditions change.
Data Source
AI summary
A control system is designed and intended for use in a host motor vehicle and to detect a preceding vehicle in the surroundings of the host motor vehicle from surroundings data acquired by means of a surroundings sensor system of the host vehicle, to capture operating data of the host motor vehicle by means of a driving state sensor system of the host motor vehicle, and, in a recording mode, to capture and store operating data and/or surroundings data of the host motor vehicle, and, in a playback mode, to set an acceleration and/or a speed of the host motor vehicle depending on the operating data stored in the recording mode and/or the surroundings data stored in the recording mode, wherein the control system is designed and intended to interrupt the playback mode as soon as the time interval between the host motor vehicle and the preceding vehicle falls below a predefined time interval.