Preview Damping Control Using Stored Road Data in Tunnels
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Solution Overview
Problem
Conventional preview damping control systems for vehicles cannot perform damping control when traveling in areas with communication disruptions, such as tunnels, due to the inability to acquire necessary road surface displacement information from the cloud.
Innovation Solution
A preview damping control apparatus and method that includes a communication device, a control force generating device, and an on-board memory device, allowing the system to store and use pre-acquired road surface displacement information for damping control even in communication disruption areas, ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses cloud communication to acquire road surface displacement information, then the preview damping control can be performed with up-to-date information, but the system cannot operate in communication disruption areas such as tunnels
Solution Approach 1:
The system performs preliminary actions by acquiring and storing road surface displacement information in the on-board memory device before the vehicle enters communication disruption areas. The control unit stores this information in advance during periods when communication is available, enabling the preview damping control to continue operating using pre-stored data when communication is disrupted.
2Adaptability or versatility
If the system stores road surface displacement information in an on-board memory device, then the system can operate in communication disruption areas, but the system requires additional hardware components
Solution Approach 1:
The on-board memory device serves multiple functions: it stores road surface displacement information for preview damping control, and can potentially store other vehicle operational data. This multi-functionality reduces the need for separate dedicated storage components, thereby minimizing the increase in device complexity while enabling operation in communication disruption areas.
3Measurement precision
If the system continuously acquires road surface displacement information from the cloud, then the damping control accuracy is maintained, but the system cannot function when communication is disrupted
Solution Approach 1:
The control unit performs preliminary acquisition and storage of road surface displacement information during periods when cloud communication is available. This pre-stored information is then used to maintain damping control accuracy during communication disruptions, ensuring both measurement precision and system reliability are preserved across different operating conditions.
Data Source
AI summary
The preview damping control includes an ECU. When the vehicle is traveling within a communications disruption area in which a radio communication device is hard to communicate with a cloud, the ECU uses road surface displacement correlating information that has been stored in an on-board memory device in advance for the communications disruption area so as to perform a preview damping control.