Travel Control Device Balancing Stability and Arrival Time
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing travel control devices prioritize stability over driver-specified conditions like mileage, trip time, and drivability, often resulting in late arrivals due to overemphasis on stability.
Innovation Solution
A travel control device that acquires a stability speed limit pattern and adjusts travel control using a target speed pattern, allowing for dynamic intervention based on the difference between actual and stability speed limits, ensuring stability while satisfying driver preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If travel control is performed to ensure vehicle stability by controlling speed according to road conditions, then travel stability is improved, but arrival time deteriorates (vehicle arrives late)
Solution Approach 1:
The travel control device dynamically adjusts the degree of intervention based on the difference between actual speed and stability speed limit. When the difference is large, intervention is increased to maintain stability; when the difference is small, intervention is reduced to allow faster travel. This dynamic adjustment resolves the contradiction by making the control system adaptive rather than static.
Solution Approach 2:
The system changes the parameter of intervention degree based on the speed difference. By modifying the control parameter (intervention degree) according to the relationship between actual speed and stability speed limit, the system can satisfy both stability requirements and time efficiency requirements under different operating conditions.
2Stability of the object's composition
If travel control intervention is increased to maintain stability within speed limits, then travel stability is improved, but driver comfort deteriorates (driver feels discomfort due to intervention)
Solution Approach 1:
The intervention degree parameter is changed based on the speed difference. When the difference between actual speed and stability speed limit is small, the intervention degree is reduced, making the control actions gentler and less intrusive to the driver. When the difference is large, intervention is increased to ensure stability. This parameter adjustment resolves the contradiction by adapting the control strength to the situation.
Solution Approach 2:
The system applies partial intervention only when necessary (when speed difference exceeds threshold or is large). When the vehicle is already close to the stability speed limit, full intervention is not applied, reducing driver discomfort while still maintaining stability. This partial action approach resolves the contradiction by avoiding excessive control when stability is already adequate.
Data Source
AI summary
Disclosed is a travel control device which controls the travel of a vehicle. The travel control device includes an acquisition unit which acquires a stability speed limit pattern indicating an upper speed limit, within which the vehicle is travelable without departing from a scheduled travel road, and a travel control adjustment unit which adjusts travel control using a target speed pattern indicating a target speed on the basis of the stability speed limit pattern and an actual speed. Therefore, it is possible to satisfy driving conditions desired by a user while ensuring travel stability.