Vehicle Ride Comfort Control Around Rumble Strip Detection
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Solution Overview
Problem
Existing vehicle control systems face interference between ride comfort control and uneven road structures like rumble strips, which are intended to alert drivers or prevent drowsiness, as these systems reduce vibrations and sounds that these structures aim to generate.
Innovation Solution
A vehicle behavior control device and method that includes a road surface condition detection unit to identify uneven structures and a ride comfort control unit that suppresses ride comfort adjustments when the vehicle approaches such structures, ensuring the structures can effectively alert drivers by maintaining vibrations and sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ride comfort control is performed by adjusting braking/driving force, then vehicle vibration is reduced and ride comfort is improved, but the vibration and sound generated by uneven road structures (rumble strips) are also reduced, defeating their purpose of alerting drivers
Solution Approach 1:
The ride comfort control system dynamically adjusts its operation based on detected road conditions. When uneven structures are detected, the control is selectively suppressed or modified to allow alertness functions to work, while maintaining comfort control for other road conditions. This dynamic adaptation resolves the contradiction by making the system behavior conditional rather than fixed.
Solution Approach 2:
The road surface condition detection unit acts as an intermediary between the ride comfort control system and the driver alertness system. It detects the presence of uneven structures and provides this information to the control system, which then adjusts its behavior accordingly. This intermediary enables the system to distinguish between road conditions that require comfort control and those that require alertness function preservation.
2Ease of operation
If ride comfort control suppresses vehicle vibration, then passenger comfort is improved, but the alerting function of uneven road structures is compromised
Solution Approach 1:
The control system applies different quality settings to different road conditions. For sections with uneven structures, the system allows vibration to pass through to maintain alerting effectiveness. For smooth road sections, the system actively suppresses vibration for passenger comfort. This localized quality adjustment resolves the contradiction by applying appropriate control characteristics to specific road segments.
Solution Approach 2:
The system performs preliminary detection of uneven road structures before the vehicle reaches them. Upon detection, it proactively adjusts the ride comfort control to prevent suppression of the alerting vibration. This preliminary anti-action ensures that the alerting function is preserved before the vehicle actually encounters the uneven structure, avoiding the harmful effect of reduced alerting.
3Stability of the object's composition
If the vehicle control system actively manages braking/driving force, then vehicle stability is improved, but interference with road surface alerting structures occurs
Solution Approach 1:
The vehicle control system dynamically modifies its stability management based on detected road conditions. When uneven alerting structures are detected, the system temporarily adjusts its control parameters to allow the structures to function effectively. This dynamic behavior enables the system to maintain stability for normal operation while preserving alerting function when needed.
Solution Approach 2:
The system uses feedback from the road surface condition detection unit to adjust its control strategy. The detection feedback about uneven structures triggers a change in control behavior, allowing the alerting function to work. This feedback mechanism enables the system to automatically adapt to road conditions and resolve the contradiction between stability management and alerting function preservation.
Data Source
AI summary
A vehicle behavior control device and a vehicle behavior control method are provided in the disclosure, which includes the following components. A road surface condition detection unit configured to detect whether an uneven structure extending or spreading along a front-rear direction of a vehicle or a left-right direction of the vehicle exists on a front road surface of the vehicle. A ride comfort control unit, configured to perform ride comfort control by adjusting braking/driving force of each of the front and rear wheels of the vehicle. When the uneven structure is detected by the road surface condition detection unit, the ride comfort control is suppressed.