Virtual ECU Fault Simulation for Vehicle Behavior Analysis
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Solution Overview
Problem
Existing fault simulation methods for electronic control units (ECUs) in vehicles fail to effectively evaluate the occurrence of faults and their influence on vehicle behavior, particularly in hazard analysis and risk assessment, due to limitations in simulating real-world scenarios and reproducibility of electrical damage.
Innovation Solution
A simulation system comprising a simulation unit, analysis unit, control unit, and output unit that allows users to set and evaluate fault conditions in a vehicle process, enabling the simulation of ECU faults and their impact on vehicle behavior, including the generation of travel information and fault insertion based on user-defined scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real vehicle testing is used for fault insertion testing, then comprehensive fault evaluation can be achieved, but it exerts serious influence on man-hours, time periods, and costs
Solution Approach 1:
The patent creates a virtual ECU that replicates the functionality and fault behaviors of a real ECU in a simulated environment. This virtual copy allows comprehensive fault insertion testing to be performed on over 10,000 experimental items without using actual vehicles, thereby maintaining measurement precision while dramatically reducing time and cost resources
2Loss of time
If simulation-based virtual ECUs are used for fault insertion testing, then testing time and cost are reduced, but the occurrence of faults based on situations required in H & R and the influence on vehicle behaviors are not readily evaluated
Solution Approach 1:
The patent pre-loads travel information including various driving scenarios and environmental conditions into the virtual ECU before fault insertion testing begins. This preliminary preparation enables the simulation to accurately evaluate fault occurrence based on specific situations required in hazard analysis and risk assessment, maintaining measurement precision while using time-efficient simulation methods
Solution Approach 2:
The virtual ECU incorporates feedback mechanisms that monitor and evaluate the influence of inserted faults on vehicle behaviors by comparing simulated outcomes against expected normal operations. This feedback loop ensures accurate assessment of fault impacts without requiring extensive real vehicle testing
Data Source
AI summary
A fault simulation system that has a simulation unit comprising an ECU model including an element fault model made to have a fault by a time setting or external command and all or a portion of a sensor model, actuator model, vehicle model, and driver model and can evaluate vehicle behavior at the time of an element fault according to driving operation based on a set travel scenario, wherein the passage time, vehicle behavior, driving operation, and the like, at each point on a course are determined through non-fault simulation and on the basis of that information, an element fault is inserted according to a fault time setting or fault command for the element fault model.