Off-Road Vehicle Speed Control for Predicted Path Separation
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Solution Overview
Problem
Current avoidance technologies for off-road vehicles are inadequate due to the unpredictable nature of off-road environments, necessitating a method to control vehicle speed relative to secondary off-road vehicles to prevent undesirable interactions.
Innovation Solution
A method executed by a vehicle processor that receives inputs from a secondary off-road vehicle, determines a predicted trajectory path and position, calculates a separation distance, and adjusts vehicle speed based on distance thresholds and arrival time to avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If on-road avoidance technologies are used for off-road vehicles, then the technology can be implemented, but the technology is inadequate for off-road environments
Solution Approach 1:
The system adapts avoidance technology specifically for off-road conditions by implementing environment-specific detection and response mechanisms. The controller adjusts operational parameters and alert thresholds based on off-road terrain characteristics, making the technology locally optimized rather than universally applied.
Solution Approach 2:
The system dynamically adjusts speed limits and alert thresholds based on real-time conditions. The controller continuously monitors proximity to other vehicles and modifies operational parameters accordingly, creating a dynamic adaptation system that responds to changing off-road environments rather than using static thresholds.
2Reliability
If the vehicle speed is limited to avoid collisions, then safety is improved, but the productivity decreases
Solution Approach 1:
The system applies speed limitation only partially - specifically when proximity thresholds are breached - rather than continuously limiting speed. This allows the vehicle to maintain higher speeds during safe conditions while imposing restrictions only when necessary to prevent collisions, balancing safety with productivity.
Solution Approach 2:
The system provides advance warning alerts to the operator before speed limitation is enforced. This preliminary action allows the operator to voluntarily reduce speed or take corrective action, maintaining productivity while still achieving safety objectives through operator initiative rather than immediate system intervention.
3Measurement precision
If the sampling rate is increased to improve collision detection accuracy, then the measurement precision is improved, but the use of energy increases
Solution Approach 1:
The sampling rate is dynamically adjusted based on operational conditions. The system uses higher sampling rates when vehicles are in proximity and potential collision risk exists, while reducing sampling rates when vehicles are far apart, thereby maintaining detection accuracy when needed while conserving energy during normal operation.
Data Source
AI summary
A method for controlling an off-road vehicle relative to a secondary off-road vehicle. The method, executed by a processor of the vehicle, includes the steps of receiving an input from the secondary off-road vehicle, determining a predicted trajectory path of the vehicle; determining a trajectory position of the vehicle, the trajectory position corresponding to a point of interest related to a distance between the vehicle and the secondary off-road vehicle on the predicted trajectory path; determining a separation distance between the secondary off-road vehicle and the trajectory position; and in response to the separation distance being less than a distance threshold, controlling a speed of the vehicle.