scholarly journals Key Parameter Precision Analysis Method of Spatial Viewing Zones for the Autostereoscopic Display Device

2017 ◽  
Author(s):  
LI Jing
Keyword(s):  
Display Device ◽  
Analysis Method ◽  
Precision Analysis ◽  
Autostereoscopic Display ◽  
Parameter Precision ◽  
Key Parameter

An assembly precision analysis method based on a general part digital twin model

2021 ◽  
Vol 68 ◽  
pp. 102089
Author(s):  
Ke Wang ◽  
Daxin Liu ◽  
Zhenyu Liu ◽  
Qide Wang ◽  
Jianrong Tan
Keyword(s):  
Analysis Method ◽  
Precision Analysis ◽  
Digital Twin ◽  
Twin Model ◽  
General Part ◽  
Assembly Precision

Precision Analysis of Parametric Modification of the Die Face Based on Reverse Engineering

2013 ◽  
Vol 385-386 ◽  
pp. 121-124 ◽  
Author(s):  
Jun Fan ◽  
Lei Gang Wang
Keyword(s):  
Data Acquisition ◽  
Total Error ◽  
Reconstruction Error ◽  
Error Distribution ◽  
Analysis Method ◽  
Precision Analysis ◽  
Precision Control ◽  
Reconstruction Process ◽  
Accuracy Requirement ◽  
Modification Process

The conventional precision analysis method of modification and design is qualitative, laborious and time consuming. The precision of reverse parametric modification have direct influences on the quality of the reversed products. In this paper, a quantitative analysis method based on a reverse parametric approach and precision control concept is proposed. Combining with the ATOS scanner system, analyzing every aspect of the precision control and the error distribution, including data acquisition process, reverse reconstruction process and parametric process. In the process of the product reverse parametric modification, general error distribution is mainly composed of data acquisition error, reverse reconstruction error and parametric error. The method of precision control during the reverse parametric modification process is analyzed, according to this method, the total error of parametric modification for die face is 0.089mm, is lower than the accuracy requirement of 0.10mm in the reverse parametric modification process, the reverse modification of the die face of the blade based on precision control is realized. Validity and effectiveness of the method has been confirmed by case studies.

scholarly journals A precision analysis method for the kinematic assembly of complex products based on equivalence of deviation source

2020 ◽  
Vol 40 (3) ◽  
pp. 447-460 ◽  
Author(s):  
Dongping Zhao ◽  
Gangfeng Wang ◽  
Jizhuang Hui ◽  
Wei Hou ◽  
Richard David Evans
Keyword(s):  
Orientation Angle ◽  
Joint Clearance ◽  
Propagation Path ◽  
Analysis Method ◽  
Precision Analysis ◽  
Accurate Analysis ◽  
Content Type ◽  
Complex Products ◽  
Form Deviation

Purpose The assembly quality of complex products is pivotal to their lifecycle performance. Assembly precision analysis (APA) is an effective method used to check the feasibility and quality of assembly. However, there is still a need for a systematic approach to be developed for APA of kinematic mechanisms. To achieve more accurate analysis of kinematic assembly, this paper aims to propose a precision analysis method based on equivalence of the deviation source. Design/methodology/approach A unified deviation vector representation model is adopted by considering dimension deviation, geometric deviation, joint clearance and assembly deformation. Then, vector loops and vector equations are constructed, according to joint type and deviation propagation path. A combined method, using deviation accumulation and sensitivity modeling, is applied to solve the kinematic APA of complex products. Findings When using the presented method, geometric form deviation, joint clearance and assembly deformation are considered selectively during tolerance modeling. In particular, the proposed virtual link model and its orientation angle are developed to determine joint deviation. Finally, vector loops and vector equations are modeled to express deviation accumulation. Originality/value The proposed method provides a new means for the APA of complex products, considering joint clearance and assembly deformation while improving the accuracy of APA, as much as possible.

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