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Time sequence propelling method and device for co-simulation of white-box and black-box discrete event systems

A discrete event and co-simulation technology, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as the lack of a unified integration framework, and achieve the effect of preventing simulation sequence management

Pending Publication Date: 2021-12-17
TSINGHUA UNIV
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Problems solved by technology

However, researchers rarely consider this issue, lacking a unified integration framework in this mode

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  • Time sequence propelling method and device for co-simulation of white-box and black-box discrete event systems
  • Time sequence propelling method and device for co-simulation of white-box and black-box discrete event systems

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Embodiment Construction

[0033] The present disclosure proposes a timing advancement method and device for co-simulation of white-box and black-box discrete event systems. The present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] In this disclosure, a white-box model refers to a model based on fundamental principles, which is constructed according to the professional knowledge of different disciplines, and usually includes a set of deterministic functions, such as ordinary differential equation (ODE), differential algebraic equation (DAE), etc. Therefore, the construction parameters or system states of white-box models usually have specific physical meanings.

[0035] Unlike white-box models, black-box models are built entirely on data and do not require any strict scientific theorems. Black-box models tend to use data science techniques to fit or mimic the relationship between inputs and outputs. This is a useful...

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Abstract

The invention provides a time sequence propelling method and device for co-simulation of white-box and black-box discrete event systems, and belongs to the technical field of co-simulation time sequence consistency. The method comprises the following steps: determining a current safety time distance and current simulation time of each white-box system according to a current step length of each white-box system in the discrete event system; calculating the current safety simulation time of each black-box system according to the current safety time distance and the current simulation time of each black-box system in the discrete event system; according to the current simulation time of each white-box system and the current safety simulation time of each black-box system, determining a next propulsion subsystem in simulation; and advancing simulation according to the event table of the next advanced subsystem. The defects of optimistic propelling strategies in black and white box model co-simulation are overcome, an improved time sequence propelling method is introduced, and time sequence consistency is achieved under the condition that black-box model simulation rollback is avoided as much as possible.

Description

technical field [0001] The disclosure belongs to the technical field of co-simulation timing consistency, and particularly proposes a timing advancement method and device for co-simulation of white-box and black-box discrete event systems. Background technique [0002] With the advent of Industry 4.0, modeling and simulation have become an important means to support the design and development of complex products. In addition, the concept of cyber-physical systems (CPS) has further inspired researchers to integrate computing, networking, and physical environments to realize real-time perception, dynamic control, and information services of large-scale engineering systems. In fact, a large engineering system usually consists of heterogeneous models from different disciplines. Multidisciplinary models with different sources and complex coupling relationships lead to increased complexity of integrated modeling and simulation. An extremely critical step in the interconnection i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 张和明张文嘉刘文正
Owner TSINGHUA UNIV
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