Vehicle Simulation System for Travel Controller Verification
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Solution Overview
Problem
The verification and evaluation of vehicle travel controllers in combination with vehicle external detection controllers is time-consuming and confusing, as it relies heavily on actual vehicle testing, making it difficult to determine which components need correction.
Innovation Solution
A simulation system is developed that includes a closed loop configuration with a vehicle external detection controller, a travel controller, and additional components to simulate vehicle behavior, allowing independent verification and evaluation of the travel controller without actual vehicle testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If verification and evaluation of the travel controller are performed by actual running with the travel controller incorporated in the vehicle together with the vehicle external detection controller, then the verification can be performed in a realistic environment, but the development time becomes excessively long and it becomes difficult to determine which component needs correction
Solution Approach 1:
The system segments the verification process into two independent parts: (1) a closed-loop simulation environment that verifies the vehicle external detection controller, and (2) a separate evaluation environment that tests the travel controller using predetermined test images. This segmentation allows each controller to be verified independently, eliminating the need for lengthy integrated actual running tests and enabling rapid identification of which component requires correction.
Solution Approach 2:
The system creates a virtual copy of the vehicle external detection environment through the closed-loop simulation, which generates test images that replicate real-world detection scenarios. This copying approach allows the travel controller to be evaluated using simulated detection data without requiring actual vehicle running, significantly reducing development time while maintaining verification reliability.
2Ease of manufacture
If the developments of the vehicle external detection controller and the travel controller are performed separately, then each controller can be developed independently, but it becomes confusing to determine whether to make correction work on either controller or both when verification results are not desirable
Solution Approach 1:
The verification system is segmented into distinct closed-loop and evaluation components, where the closed-loop verifies only the vehicle external detection controller and the evaluation component tests only the travel controller. This clear separation enables developers to independently develop each controller while easily identifying which specific component requires correction based on which verification fails, eliminating the confusion that arises from integrated testing.
3Reliability
If verification is performed only at a stage where the developments have progressed to a considerable extent, then the verification can be made reliable, but the correction work cannot be performed early in the development process
Solution Approach 1:
The closed-loop simulation environment is prepared in advance with predetermined test images and evaluation criteria, allowing the verification system to be ready before the controllers are fully developed. This preliminary setup enables early-stage verification and correction of both the vehicle external detection controller and the travel controller, rather than waiting until development progresses considerably, thus reducing overall correction time while maintaining reliability.
Data Source
AI summary
A control operation representer of a simulation system for a vehicle represents control operation of a travel controller in accordance with vehicle external detection information outputted by a vehicle external detection controller based on a captured vehicle external image. A vehicle behavior calculator calculates behavior of the vehicle in accordance with the control operation. A vehicle external image generator generates a vehicle external image in accordance with the behavior and displays the vehicle external image on a display member. An imaging member captures the vehicle external image displayed, and outputs a captured vehicle external image to the vehicle external detection controller. The vehicle external detection controller operates in a closed loop including these. The travel controller operates, outside the closed loop, in accordance with information generated by the vehicle external detection controller or information equivalent to the information generated by the vehicle external detection controller.