Simulated Driving System Safety Control via Wireless Data
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Solution Overview
Problem
Conventional simulated driving systems cannot reproduce actual on-road vehicle running in real time due to communication failures, which can lead to loss of control and safety issues during testing.
Innovation Solution
A simulated driving system that acquires running data via wireless communication and uses an automatic driving device and dynamometer, with a communication failure detection unit to control the test body into a safe state, ensuring safety and real-time reproduction of on-road driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is used to acquire running data from the vehicle on the road, then real-time reproduction of actual driving is enabled, but communication failure may cause loss of control and safety issues
Solution Approach 1:
The control device is pre-configured with automatic control rules and safe driving state parameters before testing begins. When communication failure is detected, the system immediately executes pre-programmed control actions to transition the test vehicle to a safe driving state, eliminating the need for real-time human intervention and ensuring rapid response to communication failures.
Solution Approach 2:
The system continuously monitors communication status and provides feedback to the control device. When communication failure is detected through the feedback mechanism, the control device automatically adjusts the test vehicle's operating state based on pre-set rules, creating a closed-loop safety system that responds dynamically to communication conditions.
2Productivity
If the vehicle on the dynamometer performs simulated driving while acquiring running data in sequence, then testing can be conducted, but real-time reproduction of on-road running cannot be achieved
Solution Approach 1:
The system maintains continuous simulated driving operation on the dynamometer while continuously acquiring running data from the vehicle on the road. The control device processes incoming data in real-time and continuously adjusts test parameters, ensuring uninterrupted testing operation and eliminating idle time between data acquisition cycles.
Solution Approach 2:
The testing system dynamically adapts its operation based on real-time communication conditions. When data is received, the system immediately updates test parameters to reflect current road conditions, creating a dynamic testing process that closely follows actual driving conditions without requiring fixed scheduling or batch processing.
3Reliability
If automatic control is implemented to ensure safety upon communication failure, then safety is improved, but control system complexity increases
Solution Approach 1:
The control device changes operational parameters based on communication status. Pre-defined parameter sets correspond to different communication conditions (normal, degraded, failed). When communication failure occurs, the system switches parameter sets rather than implementing complex real-time calculations, simplifying the control logic while maintaining safety.
Solution Approach 2:
The system prepares multiple pre-configured safe driving state parameter sets in advance, each optimized for different failure scenarios. This beforehand preparation acts as a cushion against communication failures, providing immediate safety responses without requiring complex real-time decision-making algorithms.
Data Source
AI summary
A simulated driving system makes it possible to ensure safety during testing and to simulate driving of a vehicle or a part thereof while acquiring travel data from a vehicle traveling on a road. The simulated driving system reproduces the travel state of a vehicle on a road by acquiring travel data transmitted sequentially by wireless communication from the vehicle while the vehicle travels on a road and meanwhile using the travel data as a basis to simulate driving of a vehicle that is a test body. The simulated driving system is provided with an automatic driving device that automatically drives the test body, a dynamometer that applies a load to the test body, and a control device. The control device comprises a control unit that controls the automatic driving device or the dynamometer so that the test body enters a predetermined safe driving state when failure is detected.