Vehicle Speed Control Using Multi-Directional Drivable Space Assessment
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Solution Overview
Problem
Existing vehicle adaptive cruise control systems often neglect vehicles and static road structures outside the direct path, leading to driver insecurity and mistrust, as they focus primarily on the target ahead, failing to consider the broader driving environment.
Innovation Solution
A vehicle velocity control method that determines drivable distances and areas in different directions using onboard sensors, correcting for various targets, including static structures and vehicles, to assess safety and adjust vehicle speed accordingly, thereby enhancing driver safety by considering the entire driving scenario.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing adaptive cruise control focuses only on the target vehicle ahead, then the control logic is simple, but driver security feeling deteriorates and trust in the function declines
Solution Approach 1:
The monitoring scope is segmented into multiple directional zones (front, left-front, right-front, etc.) with different safety thresholds. Each zone independently monitors for vehicles and calculates safety distances, allowing comprehensive coverage while maintaining manageable computational complexity through modular zone-based processing
Solution Approach 2:
The system transitions from one-dimensional forward monitoring to three-dimensional spatial monitoring by incorporating angular information and dividing the environment into multiple directional zones. This adds dimensional depth to the safety assessment, enabling the system to detect vehicles in side zones that would be missed by traditional single-direction monitoring
2Reliability
If the vehicle velocity control considers all directions and targets, then driver security feeling improves, but the computational complexity and processing time increase
Solution Approach 1:
The environment is divided into multiple directional zones (front, left-front, right-front, etc.), each with predefined angular ranges. This segmentation allows the system to process safety information in manageable modular units rather than treating the entire 360-degree environment as a single complex calculation problem
Solution Approach 2:
Safety threshold values for different directional zones are pre-calculated and stored based on vehicle dimensions, braking performance, and road conditions. During real-time operation, the system directly compares measured distances against these pre-established thresholds, avoiding the need for complex real-time calculations and reducing processing time
3Adaptability or versatility
If the vehicle enters a narrow drivable space, then the vehicle can navigate tight environments, but driver insecurity increases and safety is compromised
Solution Approach 1:
The system pre-calculates and stores safety threshold distances for different directional zones based on vehicle characteristics and road conditions. Before the vehicle enters a narrow space, the system compares the available space against these pre-established thresholds and issues early warnings or自动控制 velocity adjustments, preventing entry into unsafe narrow spaces rather than reacting after the fact
Solution Approach 2:
The system continuously monitors the drivable space in all directional zones and provides real-time feedback to the driver through warnings or automatic velocity control adjustments. When the available space in any zone falls below the safety threshold, the system immediately responds by alerting the driver or automatically reducing velocity, creating a closed-loop safety mechanism that adapts to changing environmental conditions
Data Source
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AI summary
The disclosure relates to a vehicle velocity control method. The method includes: determining, by an onboard sensor, drivable distances in different directions in front of a current vehicle, and obtaining, at least based on types of targets in the different directions, an area of a drivable space in front of the current vehicle; determining, based on the area of the drivable space and a current vehicle velocity, a result of a safety degree in a current driving scenario; and controlling the vehicle velocity of the current vehicle based on the result of the safety degree. The disclosure further relates to a vehicle control device, a computer storage medium, and a vehicle.