Vehicle Control Simulation Device Accounting for Parallel Processing Delays
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Solution Overview
Problem
Existing vehicle control device development technologies fail to accurately account for parallel processing and data communication delays between arithmetic devices, leading to discrepancies between simulated and actual vehicle performance.
Innovation Solution
A vehicle control simulation device that includes control model information, hardware information, arithmetic-device allocation, and a delay-time adding unit to create a delay-inclusive control model, accounting for delay times in parallel processing scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If parallel processing with multiple arithmetic devices is implemented to increase processing speed, then productivity is improved, but manufacturing precision deteriorates due to unmodeled delay times in simulation
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing delay time information for each arithmetic device before simulation execution. The delay-time adding unit then inserts these pre-computed delay values into the control model, allowing the simulation to account for processing delays without requiring real-time measurement during actual operation.
Solution Approach 2:
The patent introduces delay time information as an intermediary element between the control model and the actual hardware behavior. This intermediary parameter bridges the gap between idealized simulation and real-world parallel processing by representing the unmodeled delay effects of multiple arithmetic devices without requiring complex hardware-in-the-loop testing.
2Ease of manufacture
If model-based development is used to reduce development man-hours, then ease of manufacture is improved, but manufacturing precision deteriorates due to discrepancy between simulation and actual performance
Solution Approach 1:
The delay time information serves as an intermediary parameter that enhances model-based development accuracy. By inserting these delay values into the control model, the simulation more accurately reflects actual hardware behavior, reducing the discrepancy between simulated and real vehicle performance while maintaining the efficiency of model-based development approaches.
Solution Approach 2:
The patent applies parameter changes by introducing delay time information as an additional parameter in the control model. This parameter modification transforms the simulation from an idealized representation to one that incorporates real-world timing characteristics, improving prediction accuracy without fundamentally changing the model-based development methodology.
3Device complexity
If synchronous processing time and communication delay are ignored in simulation, then device complexity is reduced, but reliability deteriorates due to disagreement between simulation verification and actual vehicle verification
Solution Approach 1:
The patent applies preliminary action by pre-determining delay time information for each arithmetic device before simulation execution. This approach allows the model to incorporate realistic timing characteristics without requiring complex real-time measurement systems or hardware-in-the-loop infrastructure, thus improving verification reliability while controlling model complexity.
Data Source
AI summary
The present invention provides a vehicle control device and a vehicle control simulation device that enable, even for parallel processing with a plurality of arithmetic devices, approximation in act between at verification of simulation operation on a model base and at verification of operation on an actual vehicle. Provided are: control model information for control of a system; hardware information for operation of a control model; arithmetic-device allocation information as to which arithmetic device in hardware is allocated to perform arithmetic processing to a control program in the control model; delay time information regarding a case where the control model operates on the hardware; and a delay-time adding unit configured to create delay-inclusive control model information in which the delay time information is inserted in the control model, based on at least either the arithmetic-device allocation information or the hardware information.