The method of predicting the maintenance time of mechanical products based on Virtual Prototype

2022 ◽  
Vol 15 ◽  
Author(s):  
Jin Li ◽  
Xinsheng Jiang ◽  
Zituo Wang ◽  
Chunhui Wang ◽  
Yunxiong Cai
Keyword(s):  
Body Movement ◽  
Estimation Method ◽  
Prediction Method ◽  
Virtual Prototype ◽  
Time Prediction ◽  
Maintenance Time ◽  
Mechanical Products ◽  
Physical Prototype ◽  
Virtual Maintenance ◽  
Maintenance Process

Aim: To predict the mechanical product maintenance time is difficult in the situation of lack of physical prototype or similar products’ statistics in stage of design Method: According to the theory of time accumulative estimation method, a product maintenance time prediction method framework based on virtual prototype was constructed, which described the prediction process. The virtual maintenance environment which contains virtual prototype, virtual human and maintenance tools was developed. The virtual human’s position and posture information during the maintenance process was obtained by implementing VBScript language. Result: Basic maintenance motions that constitute the whole maintenance process were classified into 4 categories: body movement, upper limb movement, grasp/replace and operation. Based on MODAPTS (Modular arrangement of predetermined time standard) method and virtual maintenance simulation, corresponding time prediction methods for each categories were proposed. Discussion: Take a maintenance dissassembly and assembly task of engine as an example, through the comparison between the measured actual maintenance time and predicted time of several methods, feasibility and effectiveness of proposed method are verified

A study on product assembly and disassembly time prediction methodology based on virtual maintenance

2019 ◽  
Vol 39 (4) ◽  
pp. 566-580 ◽  
Author(s):  
Kaijun Cai ◽  
Weiming Zhang ◽  
Wenzhuo Chen ◽  
Hongfei Zhao
Keyword(s):  
Evaluation Method ◽  
Body Movement ◽  
Influence Factors ◽  
Prediction Method ◽  
Standard Theory ◽  
Content Type ◽  
Time Prediction ◽  
Physical Prototype ◽  
Motion Characteristics ◽  
Virtual Maintenance

Purpose Based on virtual maintenance, this paper aims to propose a time prediction method of assembly and disassembly (A&D) actions of product maintenance process to enhance existing methods’ prediction accuracy, applicability and efficiency. Design/methodology/approach First, a framework of A&D time prediction model is constructed, which describes the time prediction process in detail. Then, basic maintenance motions which can comprise a whole A&D process are classified into five categories: body movement, working posture change, upper limb movement, operation and grasp/placement. A standard posture library is developed based on the classification. Next, according to motion characteristics, different time prediction methods for each motion category are proposed based on virtual maintenance simulation, modular arrangement of predetermined time standard theory and the statistics acquired from motion experiment. Finally, time correction based on the quantitative evaluation method of motion time influence factors is studied so that A&D time could be predicted with more accuracy. Findings Case study of time prediction of products’ various A&D processes is conducted by implementing the proposed method. The prediction process of diesel cooling fan disassemble time is presented in detail. Through comparison, the advantages and effectiveness of the method are demonstrated. Originality/value This paper proposes a more accurate, efficient and applicable product A&D time prediction method. It can help designers predict A&D time of a product maintenance accurately in early design phases without a physical prototype. It can also provide basis for the verification of maintainability, the balance of the design of product structure and system layout.

Analysis of Key Technologies for Aeroengine Maintenance Based on Virtual Reality

2009 ◽  
Vol 16-19 ◽  
pp. 801-805
Author(s):  
Hong Shi ◽  
Song Xiang ◽  
Jing Wang
Keyword(s):  
Virtual Reality ◽  
Cycle Length ◽  
Process Model ◽  
Simulation Analysis ◽  
Virtual Reality Technology ◽  
Analysis And Evaluation ◽  
Key Technologies ◽  
Physical Prototype ◽  
Virtual Maintenance ◽  
Maintenance Process

The virtual maintenance technology based on the virtual reality technology has changed the traditional single-site maintenance means, and also overcame the shortcoming of manufacturing cycle length, high cost, and difficult to amend for the physical prototype. Furthermore, it can expose the problem during the early design. The key technologies of virtual maintenance include the maintenance process model, virtual maintenance prototype, virtual maintenance simulation, analysis and evaluation of maintainability. In this paper, the research object is aeroengine.The key technologies of virtual maintenance were analyzed.

scholarly journals Maintenance Time Measurement for Mechanical Products Based on Virtual Prototype

2019 ◽  
Vol 18 (1) ◽  
pp. 15-23
Author(s):  
Kaijun Cai ◽  
Weiming Zhang ◽  
Jiang Li ◽  
Hongfei Zhao
Keyword(s):  
Virtual Prototype ◽  
Time Measurement ◽  
Maintenance Time ◽  
Mechanical Products

Prediction Method for Plastic Collapse of Pipes Subjected to Combined Bending and Torsion Moments

2010 ◽  
Author(s):  
Yinsheng Li ◽  
Kunio Hasegawa ◽  
Phuong H. Hoang ◽  
Bostjan Bezensek
Keyword(s):  
Entire Range ◽  
Estimation Method ◽  
Prediction Method ◽  
Bending Moment ◽  
Combined Loading ◽  
Plastic Collapse ◽  
Finite Element Analyses ◽  
Pure Torsion ◽  
Stainless Steel Pipe ◽  
Service Inspection

When a crack is detected in a pipe during in-service inspection, the failure estimation method given in the codes such as ASME Boiler and Pressure Vessel Code Section XI non-mandatory Appendix C or JSME S NA-1-2008 Appendix E-8 can be applied to assess the integrity of the pipe. In the current editions of these codes, the failure estimation method is provided for bending moment and pressure. Torsion load is assumed to be relatively small and is not considered in the method. In this paper, finite element analyses are conducted for 24-inch stainless steel pipe with a circumferential surface crack subjected to the combined bending and torsion moments, focusing on large and pure torsion moments. Based on the analysis results, a prediction method for plastic collapse under the combined loading conditions of bending and torsion is proposed for the entire range of torsion moments.

Forecasting Model of Short-Term Traffic Flow Based on Cloud Model

2011 ◽  
Vol 94-96 ◽  
pp. 38-42
Author(s):  
Qin Liu ◽  
Jian Min Xu
Keyword(s):  
Real Time ◽  
Traffic Flow ◽  
Cloud Model ◽  
Prediction Method ◽  
Absolute Error ◽  
Short Term ◽  
Guangzhou City ◽  
Time Prediction ◽  
Real Time Traffic ◽  
Absolute Percent Error

In order to improve the prediction precision of the short-term traffic flow, a prediction method of short-term traffic flow based on cloud model was proposed. The traffic flow was fit by cloud model. The history cloud and the present cloud were built by historical traffic flow and present traffic flow. The forecast cloud is produced by both clouds. Then, combining with the volume of the short-term traffic flow of an intersection in Guangzhou City, the model was calculated and simulated through programming. Max Absolute Error (MAE) and Mean Absolute percent Error (MAPE) were used to estimate the effect of prediction. The simulation results indicate that this prediction method is effective and advanced. The change of the historical and real time traffic flow is taken into account in this method. Because the short-term traffic flow is dealt with as a whole, the error of prediction is avoided. The prediction precision and real-time prediction are satisfied.

scholarly journals Effects of Logistic Processes to the Maintenance Time

2018 ◽  
Vol 26 (42) ◽  
pp. 135-143
Author(s):  
Péter Telek
Keyword(s):  
Manufacturing Systems ◽  
Material Handling ◽  
New Concepts ◽  
Maintenance Time ◽  
Production Area ◽  
Maintenance Process ◽  
Service Task ◽  
Individual Service

Abstract In these days, the maintenance process, as a part of the operation of manufacturing systems, is also developing while following the changes in the production area. Maintenance, in many of the cases, is operating as an individual service task, which requires many changes from the related handling processes. To follow the changes and the development in the field of the maintenance, we need many new concepts, methods and ideas. Main objective of our research was to uncover the relations between the effectivity of the maintenance processes and the material handling parameters. In this paper, we summarise the development of the maintenance processes and give an overview about the topical handling tasks, which must be solved.

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