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Model Reconstruction and Error Analysis Based on Scattered Points in Reverse Design

Author: LiuJingNa
Tutor: LiQingFen
School: Harbin Engineering University
Course: Mechanical Design and Theory
Keywords: Reverse engineering Multi-view data alignment ICP algorithm Model reconstruction Error Analysis
CLC: TH122
Type: Master's thesis
Year: 2010
Downloads: 131
Quote: 1
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Abstract


As a new product development and digestion and absorption of advanced manufacturing technology an important means of reverse engineering technology research being industry attaches great importance to all countries , and made ??a lot of research and get a wide range of applications . Which model reconstruction is an important issue in the process of reverse engineering point data preprocessing , the reconstruction model accuracy a direct impact on the feasibility of the subsequent design . This paper first describes the basic concepts and key technologies for reverse engineering , and focus on multi- view data put together and model reconstruction technology , reconstructed from scattered data model actual needs , the measurement of scattered data , multi-view data processing surface reconstruction techniques are studied further enrich or improve the reverse engineering . First proposed in the model reconstruction process point data alignment problem of multi-view , and the selection of the reference point and feature-based multi- view data alignment method described in detail , and the combination of these two methods under the guidance of combined the the reverse design software imageware multi-view data for the motorcycle before the rain cover , multi-look put together, well put together effect . ICP algorithm selection in case there is no reference point on the aircraft model scattered data directly aligned calculated corresponding rotation and translation matrix , will be aligned point cloud data after re-import IGES file conversion for CAD modeling software , follow-up data modeling provides support . On the basis of complete data , this paper discusses the reverse engineering modeling technology is being widely used in curves, surfaces mathematical model of Bezier, B -spline , NURBS curves , surfaces, and related modeling technology . Gear model selection curve fitting model refactoring direct the motorcycle before rain cover model reconstruction surface reconstruction , and the study was conducted by the the pretreated point cloud to CAD model reconstruction curve , surface the reconstruction process and the error model analysis , surface quality analysis . Study the reverse engineering error model , analysis of the reconstruction model error sources , The overall reconstruction model derived error control within 0.5mm , and strive to make the reconstruction of CAD models to meet the accuracy requirements of the design components to support the follow-up application .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical design, calculation and mapping > Mechanical Design
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