Vehicle Driving Assist System Dynamic Control Pattern
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Solution Overview
Problem
Conventional vehicle driving assist systems often execute excessive control that is contrary to the driver's intent, particularly in heavy traffic or crowded merge situations, due to difficulty in adapting to specific traffic conditions.
Innovation Solution
A vehicle driving assist system that selects an appropriate control pattern based on the driver's intention, calculated using the accelerator pedal actuation state and positional relationship with obstacles, to adjust the accelerator pedal reaction force and deceleration, thereby reducing annoyance and improving control matching the driver's intent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system executes control based on risk potential and time to collision, then the safety and obstacle avoidance capability is improved, but the system may perform excessive control that is contrary to the driver's intent in heavy traffic or crowded merge situations
Solution Approach 1:
The system dynamically adjusts the control execution region based on the driver's predicted intention. When the driver intends to accelerate, the control execution region is shortened; when the driver intends to decelerate and the distance to obstacle is increasing, the control execution region is lengthened. This dynamic adaptation allows the system to maintain safety while respecting the driver's intent in different traffic situations.
Solution Approach 2:
The system changes the parameter of control execution region length based on detected driver intention and traffic conditions. By modifying this parameter, the system achieves different control behaviors: shorter execution region when driver intends to accelerate (reducing excessive control), and longer execution region when driver intends to decelerate (maintaining safety). This parameter change resolves the contradiction between safety and adaptability to driver intent.
2Device complexity
If the system uses a fixed control execution region, then the control logic is simple, but the system cannot adapt to different traffic situations and driver intentions
Solution Approach 1:
The control execution region is made dynamic rather than fixed. The system adjusts the execution region length based on driver intention detection and traffic situation analysis. This dynamic approach enables the system to adapt to different traffic situations (heavy traffic, crowded merges, open roads) while maintaining a relatively simple control logic structure that selects from predefined control patterns.
3Ease of operation
If the system shortens the control execution region when driver intends to accelerate, then the interference with driver operation is reduced, but the safety margin may be compromised in high-risk situations
Solution Approach 1:
The system changes the control execution region parameter based on both driver intention and risk assessment. When driver intends to accelerate, the execution region is shortened to reduce interference with driver operation. However, the system maintains safety by considering the overall risk situation and using appropriate control patterns that ensure adequate safety margins even with the shortened execution region.
Data Source
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AI summary
A vehicle driving assist system executes an actuation reaction force control of accelerator pedal, a driving force control or a braking force control in a manner that is appropriate in consideration of the traffic situation in which the vehicle is being driven. The vehicle driving assist system calculates a risk potential that indicates the degree of convergence between the vehicle and an obstacle existing in front of the vehicle based on a prescribed control pattern. Then, based on the risk potential, the accelerator pedal actuation reaction, the host vehicle driving force and/or the host vehicle braking force are controlled. The intent of the driver regarding acceleration and deceleration based on the actuation state of the accelerator pedal is preferably used in controlling one or all of the accelerator pedal actuation reaction, the host vehicle driving force and the host vehicle braking force.