HILS Simulation Apparatus Signal Terminal Pooling
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Solution Overview
Problem
In Hardware In the Loop Simulation (HILS) systems for vehicle electronic control units, the number of signal terminals in the interface unit often does not match the controlled plants, leading to either insufficient or excess terminals, necessitating the production of new HILS systems.
Innovation Solution
A simulation apparatus that allows signal input and output between simulation apparatuses via communication, utilizing available signal terminals on other apparatuses to simulate controlled objects or controllers, even when there are no unused terminals locally, through an arithmetic process portion connected by communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of signal terminals in the interface unit is increased to accommodate different controlled plants, then the adaptability improves, but the device complexity and cost increase
Solution Approach 1:
The patent implements a pool of signal terminals that can be dynamically allocated to different controlled plants based on simulation requirements. Instead of providing dedicated terminals for each possible controlled plant, the system creates a universal terminal pool that serves multiple functions and multiple controlled plants through dynamic assignment and sharing mechanisms.
Solution Approach 2:
The system dynamically assigns signal terminals to controlled plants based on real-time simulation needs. The terminal allocation is not fixed but changes dynamically according to which controlled plant is being simulated, allowing the same physical terminals to serve different purposes at different times.
2Quantity of substance
If a new HILS system is produced when signal terminals are insufficient, then the terminal availability improves, but the loss of substance and waste increase
Solution Approach 1:
When a controlled plant finishes its simulation, its allocated signal terminals are released back to the pool and recovered for reuse by other controlled plants. This recycling mechanism prevents waste by ensuring that terminals are continuously utilized rather than being discarded or left idle after a single use.
Solution Approach 2:
The same physical signal terminals serve multiple controlled plants sequentially through dynamic allocation, maximizing their utilization rate and preventing the need to produce additional terminals or entire HILS systems for each controlled plant.
3Reliability
If dedicated signal terminals are allocated to each controlled plant, then the reliability improves, but the adaptability to configuration changes worsens
Solution Approach 1:
The system maintains reliable signal transmission by establishing dedicated connections between signal terminals and controlled plants during active simulation, while allowing dynamic reconfiguration when simulations change. The reliability is preserved during operation while adaptability is achieved through controlled reconfiguration.
Data Source
AI summary
A simulation apparatus includes an arithmetic process unit 20 that models a controlled plant and simulates the operation of the modeled controlled plant, and an interface unit 30 that inputs and outputs a signal between the arithmetic process unit 20 and an ECU 100A, and the arithmetic process unit 20 is configured so as to be capable of inputting and outputting the signal from/to the ECU 100A by using another interface unit 30 provided on another simulation apparatus in addition to the interface unit 30.