Measurement-based geometric reconstruction for milling turbine blade using free-form deformation

Zhao, Zhengcai; Fu, Yucan; Liu, Xuan; Xu, Jie; Wang, Jun; Mao, Shujie

doi:10.1016/j.measurement.2017.01.009

Cited by 31 publications

(8 citation statements)

References 26 publications

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“…This kind of method is more suitable for dense and unorganized points. The lofting method generates the fitting surface by lofting several crosssections of the surface [144]. This method is especially suitable for the line scanning inspection pattern and is widely used in the reconstruction of blade surfaces.…”

Section: Surface Reconstructionmentioning

confidence: 99%

Surface form inspection with contact coordinate measurement: a review

Shen

Ren

Huang

et al. 2023

Int. J. Extrem. Manuf.

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Parts with high-quality freeform surfaces have been widely used in industries, which require strict quality control during the manufacturing process. Among all the industrial inspection methods, contact measurement with coordinate measuring machines or computer numerical control machine tool is a fundamental technique due to its high accuracy, robustness, and universality. In this paper, the existing research in the contact measurement field is systematically reviewed. First, different configurations of the measuring machines are introduced in detail, which may have influence on the corresponding sampling and inspection path generation criteria. Then, the entire inspection pipeline is divided into two stages, namely the pre-inspection and post-inspection stages. The typical methods of each sub-stage are systematically overviewed and classified, including sampling, accessibility analysis, inspection path generation, probe tip radius compensation, surface reconstruction, and uncertainty analysis. Apart from those classical research, the applications of the emerging deep learning technique in some specific tasks of measurement are introduced. Furthermore, some potential and promising trends are provided for future investigation.

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Section: Surface Reconstructionmentioning

confidence: 99%

Surface form inspection with contact coordinate measurement: a review

Shen

Ren

Huang

et al. 2023

Int. J. Extrem. Manuf.

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“…Yun et al [16] imported parameterization design to Free-Form Deformation (FFD) and realized the model reconstruction based on measure data. Zhao et al [17] improved the accuracy of reconstruction by inserting knots. Feng et al [2] predicted the desired spline curves considering the deformation and thickness of the blank material while preserving the design intent.…”

Section: Related Workmentioning

confidence: 99%

LETR: An End-to-End Detector of Reconstruction Area in Blades Adaptive Machining with Transformer

et al. 2022

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In the leading/trailing edge’s adaptive machining of the near-net-shaped blade, a small portion of the theoretical part, called the reconstruction area, is retained for securing aerodynamic performance by manual work. The next work is to recognize the reconstruction area of the reconstructed leading/trailing edge’s image. To accelerate this process, an anchor-free neural network model based on Transformer was proposed, named Leading/trailing Edge Transformer (LETR). LETR extracts image features from an aspect of mixed frequency and channel domain. We also integrated LETR with the newest meta-Acon activation function. We tested our model on the self-made dataset LDEG2021 on a single GPU and got an mAP of 91.9%, which surpassed our baseline model, Deformable DETR, by 1.1%. Furthermore, we modified LETR’s convolution layer and named the new model after Ghost Leading/trailing Edge Transformer (GLETR) as a lightweight model for real-time detection. It is proved that GLETR has fewer weight parameters and converges faster than LETR with an acceptable decrease in mAP (0.1%) by test results. The proposed models provide the basis for subsequent parameter extraction work in the reconstruction area.

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“…Therefore, a finer blade design indicates a more subtle geometric description, which naturally means denser control points in FFD framework, since an adequate surrogate requires sufficient sampled data in terms of geometric parameters and aerodynamic performance that is calculated via simulation thereby. 29,30,[31][32][33] This justifies a proportional increase of computational resource consumption. In addition, the lay-out was usually not provided from a mathematical deduction in such case, but inspired from designer's experience.…”

Section: Introductionmentioning

confidence: 99%

An approach of Proper Orthogonal Decomposition-aided Free-form Deformation with application in compressor blade design

Wang

Qin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Compressor blade design influences aero-engine performance mainly through its total pressure ratio and efficiency. As a volume-based geometric parameterization, Free-form Deformation (FFD) brings three-dimensionality that is essential to blade design. However, the manipulation of control points with respect to simple numeric parametric perturbation renders the use of design space low-efficient. Therefore, an improved FFD with ‘wiser’ control point lay-out is expected to identify those more important design variables. This paper proposes novel design variables that are assigned to grouping of control points’ displacement in FFD lay-out. In short, the approach is realized as: (i) establish a library of sufficient blade shape samples; (ii) filter the database with geometric constraints; (iii) extract dominant modes via (POD) Proper Orthogonal Decomposition; (iv) construct new design variables and apply them in optimization. With geometric constraint filtering, problem-oriented information is injected. With POD, the dominance of new selected geometric parameters in problem description is assured. Perfunctory details of displacement data of each control point in the lay-out can be replaced by grouped data as new design variable candidates. As a proof-of-concept study of the new approach, compressor blade Rotor 37 is selected to be the good platform of testing the feasibility of POD-aided FFD as a global and flexible yet economic geometric parameterization. Result demonstrates the feasibility of proposed POD-aided FFD approach that helps conduct an optimization involving displacement of 6 × 4 × 3 control points with as few as five new design variables, while still being capable of bringing optimization effect in three test cases.

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Measurement-based geometric reconstruction for milling turbine blade using free-form deformation

Cited by 31 publications

References 26 publications

Surface form inspection with contact coordinate measurement: a review

Surface form inspection with contact coordinate measurement: a review

LETR: An End-to-End Detector of Reconstruction Area in Blades Adaptive Machining with Transformer

An approach of Proper Orthogonal Decomposition-aided Free-form Deformation with application in compressor blade design

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