Simulation management method, simulation system, and program

Patent metadata

Field	Value
Publication number	US-11520954-B2
Application number	US-202016816699-A
Country	US
Kind code	B2
Filing date	Mar 12, 2020
Priority date	Mar 27, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Reusable information is extracted from a result of executing a simulation of a plurality of models.A simulation management method for managing data for use in a simulation by a management device having a processor and a memory, the method including: executing a simulation using a model and data, by a simulator; extracting intermediate data indicating that an internal state of the model that is being simulated matches a predetermined state, by the management device; and holding the extracted intermediate data as useful intermediate data, by the management device.

First claim

What is claimed is:

1. A simulation management method for managing data for use in a simulation by a management device including a processor and a memory, the method comprising:
executing the simulation using a model and data, by a simulator;
extracting intermediate data indicating that an internal state of the model that is being simulated matches a predetermined state, and holding the extracted intermediate data as useful intermediate data, by the management device;
receiving an identifier of the model and the predetermined state as a condition for starting the simulation, by the management device;
acquiring the useful intermediate data from model state management information using the received identifier of the model and the received predetermined state, by the management device;
while a scenario definition is in progress, setting the acquired useful intermediate data to the model, and issuing a command to start the simulation from the predetermined state to the simulator, by the management device; and
starting the simulation from the predetermined state to the simulator to shorten time required for the simulation.

2. The simulation management method according to claim 1 , wherein
the simulation is a simulation using a plurality of models, and
the management device holds the useful intermediate data for each of the models.

3. The simulation management method according to claim 2 , comprising:
receiving identifiers of the plurality of the models and the predetermined states corresponding to the plurality of models as a condition for starting the simulation, by the management device;
acquiring a plurality of pieces of the useful intermediate data from the model state management information using the received identifiers of the plurality of models and the received predetermined states, by the management device; and
setting the plurality of pieces of acquired useful intermediate data to the models, and issuing a command to start the simulation from the predetermined states by synchronizing the plurality of models to the simulator, by the management device.

4. The simulation management method according to claim 2 , comprising:
causing a state of at least one of the plurality of models to transition to the predetermined state after setting the plurality of models, and synchronizing the plurality of models after state transition.

5. The simulation management method according to claim 1 , wherein
the predetermined state is a preset standby state or a preset steady state.

6. The simulation management method according to claim 5 , wherein
the identifier of the model in the model state management information includes a name and version information, and
the management device receives the name and the version information as the identifier of the model.

7. The simulation management method according to claim 1 , wherein
the model state management information contains the predetermined state and the identifier of the model, and
the management device acquires the useful intermediate data corresponding to the predetermined state and the identifier of the model, and stores the useful intermediate data in the model state management information so that the useful intermediate data is associated with the predetermined state and the identifier of the model.

8. The simulation management method according to claim 7 , wherein
the model state management information contains a plurality of identifies of models, and a plurality of the predetermined states are associated with the each of the plurality of identifies of the models.

9. The simulation management method according to claim 1 , wherein
an attention condition setting a value used for determination of the predetermined state and a value excluded from the determination among values indicating internal states of the model, is used as the predetermined state.

10. A simulation system comprising:
a management device including a processor and a memory; and
a simulator executing a simulation, wherein
the simulator
receives a model and data and executes the simulation, and
the management device
extracts intermediate data indicating that an internal state of the model that is being simulated matches a predetermined state, and holds the extracted intermediate data as useful intermediate data,
receives an identifier of the model and the predetermined state as a condition for starting the simulation,
acquires the useful intermediate data from model state management information using the received identifier of the model and the received predetermined state,
while a scenario definition is in progress, sets the acquired useful intermediate data to the model, and issues a command to start the simulation from the predetermined state to the simulator, and
starts the simulation from the predetermined state to the simulator to shorten time required for the simulation.

Assignees

• Hitachi Ltd

Inventors

• Kondo Nobukazu
• Baba Tsunehiko
• Okoshi Jumpei

Classifications

• B62D5/10

  characterised by type of power unit · CPC title

• G06F30/15

  Vehicle, aircraft or watercraft design · CPC title

• G05B2219/23446

  HIL hardware in the loop, simulates equipment to which a control module is fixed · CPC title

• B62D6/00

  Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits (means for initiating a change in direction B62D1/00; steering valves B62D5/06; combined with means for inclining the vehicle body or wheels on bends B62D9/00) · CPC title

• G05B17/02

  electric · CPC title