Vehicle Offset Control Using Actuation History to Reduce Car Sickness
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Solution Overview
Problem
Existing offset control technologies for vehicles do not consider the actuation performance, leading to frequent lateral acceleration changes that cause discomfort to occupants, such as car sickness.
Innovation Solution
A traveling assistance method that calculates an index value based on the recent actuation history of the offset control, adjusting the offset amount accordingly to reduce frequent actuation and associated discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If offset control is frequently actuated to maintain safety distance from approaching vehicles, then the lateral distance from approaching vehicles is increased, but the occupant experiences discomfort such as car sickness due to repeated lateral acceleration
Solution Approach 1:
The patent introduces periodic action by implementing a suppression mechanism that prevents frequent offset control actuations within a predetermined time period. The controller suppresses offset control when the actuation frequency exceeds a threshold, thereby reducing repetitive lateral acceleration that causes occupant discomfort while still maintaining safety when necessary.
Solution Approach 2:
The patent employs feedback by monitoring the actuation history of offset control and using this information to adjust future actuations. The controller calculates the time since the last offset control actuation and uses this feedback to determine whether to suppress further actuations, creating a self-regulating system that balances safety with occupant comfort.
2Ease of operation
If offset control is actuated to increase lateral distance from approaching vehicles, then the sense of security for the occupant is improved, but the actuation frequency causes car sickness due to lateral acceleration
Solution Approach 1:
The patent applies periodic action by establishing a time-based suppression mechanism that limits the frequency of offset control actuations. By preventing actuations within a predetermined time period after a previous actuation, the system reduces the repetitive lateral acceleration that causes car sickness while maintaining the sense of security through selective offset control.
Solution Approach 2:
The patent changes the parameter of offset control actuation frequency by introducing a suppression condition based on the time elapsed since the last actuation. This parameter change transforms the control strategy from potentially frequent actuations to a regulated sequence, reducing lateral acceleration effects that cause discomfort while preserving security benefits.
Data Source
AI summary
Offset control of offsetting a traveling position of a vehicle to increase a lateral distance from an approaching vehicle in an adjacent lane is actuated. When the offset control is actuated, an index value that is decided from an actuation history of the offset control and in which a higher weight is given to an actuation history of the offset control in the recent past than to an actuation history of the offset control in the distant past is calculated. As the index value, the actuation frequency of the offset control in a most recent predetermined time may be calculated. Moreover, an offset amount when the offset control is executed is changed in accordance with the index value.