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A workshop scheduling method based on digital twin

A technology for workshop scheduling and scheduling schemes, applied in the direction of control/regulation systems, comprehensive factory control, program control, etc., can solve the problems of insufficient data and lack of consideration of data that is difficult to measure directly, and achieve the effect of improving accuracy

Active Publication Date: 2020-08-04
BEIHANG UNIV
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Problems solved by technology

However, these data are still not comprehensive
This is because they are mainly measured by sensors and lack consideration for data that are difficult to measure directly

Method used

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  • A workshop scheduling method based on digital twin
  • A workshop scheduling method based on digital twin
  • A workshop scheduling method based on digital twin

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0042] Step (4): figure 1 In (4) the evaluation of the scheduling plan based on the digital twin model is based on the simulation to check whether the indicators of the scheduling plan obtained in step (3) (workpiece delay, equipment utilization rate, energy consumption) are within the set threshold range. (It should be noted that the input generated by the scheme in step (3) is the scheduling objective and constraints, and the scheduling scheme is obtained by solving the genetic algorithm here; the input of the scheme evaluation in step (4) is the scheduling scheme obtained in step (3), here Judging whether the index of this scheme is in the threshold range of setting by virtual simulation) the specific implementation is as follows:

[0043] ①Based on the digital twin model of device i (1≤i≤n) constructed in step (1), evaluate the scheduling scheme generated in step (3). Sequentially simulate and calculate the indicators of the scheduling scheme generated in step (3), specif...

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Abstract

The invention discloses a workshop scheduling method based on a digital twin model. The method comprises four steps of constructing the digital twin model, predicting the equipment availability basedon the digital twin model, generating a scheduling scheme and evaluating the scheduling scheme based on the digital twin model. A new technology of digital twin is introduced into the traditional workshop scheduling problem, and a multidimensional virtual model and simulation data provided by the digital twin are used for enhancing the equipment availability prediction and scheduling scheme evaluation in the scheduling process. On one hand, the equipment availability can be accurately predicted, so that the generated scheduling scheme is matched with the actual state of the equipment; on the other hand, the scheduling scheme can be subjected to multi-dimensional evaluation before being executed, and performance indexes (workpiece deadline, equipment utilization rate and equipment energy consumption) of the scheduling scheme are ensured to meet predefined requirements.

Description

technical field [0001] The invention belongs to the technical field of computer integrated manufacturing, and in particular relates to a digital twin-based workshop scheduling method. Background technique [0002] Scheduling is a daily production optimization problem faced by workshops. It assigns a batch of workpieces to a limited number of equipment for processing. Each workpiece has a specific processing technology. By arranging the processing sequence of workpieces on each equipment, certain indicators are optimized, such as processing Time, equipment energy consumption, equipment utilization, etc. However, in the actual production process, various dynamic disturbance factors will greatly interfere with the scheduling process, and even cause the original scheduling scheme to fail to execute normally. Among them, equipment unavailability caused by equipment wear, fatigue, breakage, etc. is one of the main disturbances. At present, with the development of Internet of Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCG05B19/4185G05B2219/31088Y02P90/02
Inventor 陶飞张萌左颖
Owner BEIHANG UNIV
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