Steering Wheel Vibration Control for Priority-Based Haptic Alerts
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Solution Overview
Problem
Existing vehicle vibration systems require multiple actuators, leading to high costs, and existing single-actuator systems fail to clearly transmit information due to cross-side vibration propagation.
Innovation Solution
A control device that uses a control unit to manage vibration priorities and apply frequency filters or intensity adjustments to cancel out low-priority vibrations, ensuring clear information transmission through dual vibration devices on the steering wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple actuators are used to transmit vibration information, then information transmission capability is improved, but device cost increases
Solution Approach 1:
The vibration information is segmented into multiple priority levels (high priority, medium priority, low priority). The control unit processes and transmits only the highest priority vibration information, effectively segmenting the information flow to avoid transmitting all vibration signals simultaneously. This reduces the need for multiple actuators while maintaining clear information transmission.
Solution Approach 2:
The system changes the parameter of vibration intensity dynamically based on priority levels. By adjusting the intensity parameter of vibration signals according to their priority, the system can clearly transmit important information using a single actuator without needing multiple actuators to differentiate between different types of vibration information.
2Device complexity
If a single vibrator is used to reduce cost, then device cost decreases, but information transmission clarity deteriorates due to cross-side vibration propagation
Solution Approach 1:
The control unit acts as an intermediary between the vibration source and the driver. It processes multiple vibration signals, applies priority-based filtering, and generates a single composite vibration signal that clearly conveys the most important information. This intermediary function resolves the conflict between using a single vibrator and maintaining clear information transmission.
Solution Approach 2:
The control unit extracts only the high-priority vibration information from multiple input signals, discarding or suppressing lower-priority signals. This extraction process allows a single vibrator to transmit clear, unambiguous information by removing conflicting or redundant vibration components that would otherwise propagate cross-side.
3Adaptability or versatility
If multiple types of vibration are transmitted simultaneously, then information variety is improved, but vibration effect clarity deteriorates
Solution Approach 1:
The system dynamically adjusts the vibration characteristics based on the priority and type of information being transmitted. The control unit can change vibration frequency, intensity, and pattern in real-time according to the current highest-priority signal, allowing versatile information transmission while maintaining clear, unambiguous vibration effects at any given moment.
Solution Approach 2:
The control unit processes vibration signals in periodic cycles, continuously evaluating priority levels and updating the transmitted vibration pattern accordingly. This periodic evaluation and adjustment mechanism allows the system to handle multiple types of vibration information while maintaining clarity by always transmitting the current highest-priority signal with appropriate vibration characteristics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables clear information transmission to vehicle occupants while maintaining cost-effectiveness by canceling out unwanted vibrations, enhancing clarity and reducing interference.
Implementation Method 1
control unit that lowers a vibration effect of a vibration having a low priority among a plurality of types of vibration on the basis of priorities defined for the plurality of types of vibration
Implementation Method 2
the control unit may lower the vibration effect of the vibration having a low priority by applying a frequency filter that cancels some or all of frequencies of the vibration for a predetermined period of time to the vibration
Implementation Method 3
techniques of transmitting information to an occupant of a vehicle by vibrating a vibration device mounted on a driving operator of the vehicle
Data Source
AI summary
Provided is a control device for controlling vibration generated by a vibration device mounted on a driving operator of a vehicle, the control device including a control unit that lowers a vibration effect of a vibration having a low priority among a plurality of types of vibration on the basis of priorities defined for the plurality of types of vibration.