Method for designing production line based on digital twin

Patent metadata

Field	Value
Publication number	US-11067970-B1
Application number	US-202117156622-A
Country	US
Kind code	B1
Filing date	Jan 24, 2021
Priority date	Feb 27, 2020
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A method for designing a production line based on digital twin (DT), includes: determining a layout strategy of a production line; customizing a DT model of production device based on a pre-built universal DT model; allowing the production device to interact with a virtual model in real time; simultaneously testing and debugging a configuration of the production line; analyzing a test and debug result to derive a defect of the production line; modifying a virtual dynamic model; repeating until an optimal result is generated through optimization and designing the product line according to the optimal result. Based on the realization of virtual and real linkage, the present disclosure performs joint debugging on a physical entity and a virtual model in the production line so as to comprehensively consider uncertainty factors of the device and better guide the modification of the simulation model according to the test result.

First claim

What is claimed is:

1. A method for designing a production line based on digital twin (DT), comprising the following steps:
(1) conducting a systematic analysis of the production line to determine a layout strategy of the production line;
(2) customizing a DT model of a production device in the production line based on a pre-built universal DT model, wherein step (2) comprises the following steps:
(s1) mapping the production device from a physical space to a virtual space;
(s2) acquiring a commonality and an individuality between behaviors of the production device, modifying a control script of the DT model, and planning behaviors of the production device;
(s3) generating and storing configurations of the production line, which comprises the following steps:
(a) analyzing a force of a material and the production device;
(b) deciding whether to simulate a collision between materials according to the force analysis in step (a);
(c) configuring a physical property of the production device: setting a physical entity property, configuring a mass parameter, setting a centroid, configuring a friction coefficient of the production device and setting a collision geometry type;
(d) configuring a physical property of the material: setting angular damping and linear damping, setting an angle factor and a line factor, configuring a mass parameter, setting a centroid and configuring a friction coefficient of the material;
(e) defining a general simulation scenario, classifying problems appeared in simulation, extracting and classifying the physical property of the production device and the material, and generating and storing a series of default configurations of the production line;
(3) establishing a communication channel between the production device and a virtual model thereof through a DT technology, so that the production device and the corresponding virtual model interact with each other in real time, and simultaneously running a virtual dynamic model and a physical device in the production line to test and debug the default configurations of the production line; and
(4) analyzing a test and debug result of step (3) to derive a defect the production line, modifying the virtual dynamic model, and repeating step (3) until an optimal result is generated through optimization; and designing the product line according to the optimal result.

2. The method according to claim 1 , wherein in step (s3), a simulation time step is set between step (a) and step (b).

3. The method according to claim 1 , wherein in step (c), the collision geometry type is at least one of a sphere, a cube, a cylinder and a triangle mesh.

4. The method according to claim 1 , wherein the mass parameter configured is a mass ratio of not greater than 1:10 between materials that collide with each other.

5. The method according to claim 1 , wherein step (3) comprises: designing a communication data interface of the twin model, configuring programmable logic controller (PLC) output port information of each virtual device, and generating a PLC control port information list of the production line dynamic model; establishing a communication channel between the production device and a virtual model thereof through a DT technology, so that the production device and the corresponding virtual model interact with each other in real time, and simultaneously running a virtual dynamic model and a physical device in the production line to test and debug a configuration of the production line.

Assignees

• Univ Guangdong Technology

Inventors

• Liu Qiang
• Yan Duxi
• Chen Xin
• Wei Lijun
• Leng Jiewu

Classifications

• Y02P90/02

  Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS] · CPC title

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• G05B2219/32339

  Object oriented modeling, design, analysis, implementation, simulation language · CPC title

• G05B19/41885 Primary

  characterised by modeling, simulation of the manufacturing system · CPC title

• G05B19/056

  Programming the PLC · CPC title