Paola Pedone - Profile on Academia.edu (original) (raw)
Papers by Paola Pedone
EMUE-D2-5-TraceabilityFromConformity
Measurement traceability is commonly obtained from calibration measurements that provide a result... more Measurement traceability is commonly obtained from calibration measurements that provide a result in terms of a single value and its associated uncertainty. However, there are circumstances where instead, the result may consist of a range of possible values. Such circumstances might arise when a result is provided in the form of the output from a conformity decision process, for example as a conformity statement in which a range of acceptable values rather than a specific value is reported. In terms of metrological traceability this style of result provides less information than a specific value, but it may be sufficient to obtain an acceptable target measurement uncertainty for a given application. The standard ISO/IEC 17025 acknowledges this in informative annex A. This example describes how such information might be used to propagate traceability. Files contained in the dataset are: "EMUE 1.2.5 (Version 5139).zip": Zip file containing tex, bib and image files "A125...
The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promisi... more The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promising manufacturing technology in the composite materials industry. While former FW uses rigid automation or Cartesian robots to produce medium-to-large size parts with simple axis-symmetric shape, recent introduction of anthropomorphic robots has enabled the manufacture of small-to-medium size parts with complex shape. The potential of the emerging technology, as compared with the conventional one, is evaluated on the basis of an integrated model which predicts how factors defining the product-process-market scenario affect main key performance (capacity, full product cost, return of the investment). The analysis reveals that the new scenario has a high potential as it not only increases product value but also allows for product diversification by exploiting the inherent cell’s flexibility. The rationale of the assessment model is general enough to handle different kinds of technologies. 1.
Methods for Quality Improvement in Products and Processes
Description: Robust Design is a statistical methodology based on the use of the information drawn... more Description: Robust Design is a statistical methodology based on the use of the information drawn from experiments on a physical prototype of a system to design (i.e. a product or a process). Many physical processes are so complex that it is difficult or even impossible to study them by conventional experimental methods. These limitations can be overcome by conducting simulated experiments (Computer Experiments) on a reliable and fast simulation model of the product or process. The combination of Robust Design and Computer Experiments can become a key methodology to sustain, in a systematic way, innovation in industrial design, while keeping cost under control. In this book new methodological developments for Robust Design using computer simulations are proposed. These methods have been successfully applied to the design of an optical profilometer, a device used for the high precision reconstruction of the micro-geometry of mechanical parts. The most important result is a significan...
Sampling Point Sequential Determination by Kriging for Tolerance Verification With CMM
Volume 1: Advanced Energy Systems; Advanced and Digital Manufacturing; Advanced Materials; Aerospace, 2008
Coordinate Measuring Machines (CMM) are widely used in industry, mainly for assessing product’s c... more Coordinate Measuring Machines (CMM) are widely used in industry, mainly for assessing product’s compliance to geometrical specifications. They are a de-facto standard for such a control, owing to their high accuracy and flexibility in catering to different measurement tasks with fast and easy setup change. One of the key aspects of any CMM inspection plan, affecting accuracy and cost, is the choice of the measurement strategy, namely the definition of the number and the location of the points sampled on the part’s surface. In the industrial practice, such important decisions are usually left to the experience of qualified operators. A method is presented here, based upon an innovative application of Kriging models to coordinate metrology, that defines an adaptive sampling strategy with the goal of obtaining accurate estimates of form errors using relatively small samples. Exploitation of kriging models (originated for geostatistics investigations, then successfully applied to the se...
New Sampling Procedures in Coordinate Metrology Based on Kriging-Based Adaptive Designs
Statistics for Innovation
This chapter describes an interesting case of process innovation generated by transferring two st... more This chapter describes an interesting case of process innovation generated by transferring two statistical technologies from their native application fields to a different one. The technologies are prediction by Kriging models and sequential experiments, originally developed for geostatistics applications and clinical trials, respectively. The combination of the two, i.e., sequential experiments driven by Kriging predictions, has been successfully applied in
Quality and Reliability Engineering International, 2008
Precision Engineering, 2011
We propose a method for designing inspection plans of small size for use in form error evaluation... more We propose a method for designing inspection plans of small size for use in form error evaluation of parts from batch or mass production using coordinate measuring machines. The method exploits a priori information coming from large sample inspection of one or a few parts of the lot. It is based on a regression model fitted to the large sample. The model is used twice. First, it provides the dominant pattern of the surface. Then, the deviations from the model that are relevant to form error are captured by weighting the points of the convex-hull of the large sample with the regression residuals. Based on two case studies, we show that the method provides a good accuracy in the estimation of straightness and flatness with very few measurement points. Comparative results also indicate that the method outperforms both the typical sampling schemes used in industry (random sampling, latin hypercube sampling), which do not exploit a priori information, and a recently proposed method using the same kind of a priori information.
Measurement, 2009
International comparisons are essential for the mutual recognition of calibration and measurement... more International comparisons are essential for the mutual recognition of calibration and measurement certificates issued by National Metrology Institutes. Current procedures are effective for comparisons involving one measurand only. In the case of multiple measurands, they provide a set of individual results -related to the measurands, taken separately -which are not aggregated into a single overall evaluation. The goal of the paper is to introduce a new performance estimator, which is able to provide an overall assessment of the participants' performance. This estimator is based on a quadratic mean of deviations from corresponding Key Comparison Reference Values (KCRVs), weighted by the inverse of the variances of such deviations. Description is supported by an example application.
The International Journal of Advanced Manufacturing Technology, 2013
In the last two decades, there has been a great development of the measuring systems in the field... more In the last two decades, there has been a great development of the measuring systems in the field of largescale dimensional metrology (LSDM), as also proved by the significant growth of the scientific literature. The aim of this paper is to analyze the LSDM scientific literature, from the dual perspective of scientific articles and patents, and estimate their impact in terms of amount of documents and relevant citations. In detail, this study investigates similarities and differences between articles and patents, as regards their dominant technologies and temporal distribution, and identifies (1) the major scientific journals and conference proceedings containing LSDM articles and (2) the major assignees of LSDM patents. Two main results emerge from the analysis: (a) important inventions concerning new LSDM systems were deposited before the end of twentieth century, while scientific articles have "bloomed" only in the last decade, and (b) the vast majority of patents concern inventions related to the laserinterferometry technology, while articles are divided more evenly among available technologies, with an important role played by the less accurate but more affordable ones, such as photogrammetry or structured-light scanning.
Design for Robustness and Cost Effectiveness: The Case of an Optical Profilometer
Asian Journal on Quality, 2006
The paper presents the design of an optical profilometer, a device used for the reconstruction of... more The paper presents the design of an optical profilometer, a device used for the reconstruction of the micro‐geometry of mechanical parts in applications where high precision is needed. The design is based on Robust Design, a major methodology for quality improvement of engineering systems. Several design solutions, namely different hardware and software setups of the device, are compared in order to select a configuration realising a desired trade‐off between performance and cost. The peculiarity of the dsgin strategy is the use of a computer m odel of the measurement process where the physical part of the process is simulated. This allows for an extensive exploration of the design space, thus opening the way to product innovation.
Applied Stochastic Models in Business and Industry, 2009
Kriging models have been extensively used to predict spatial data in geostatistics and, more rece... more Kriging models have been extensively used to predict spatial data in geostatistics and, more recently, to approximate the output of deterministic simulation. This paper presents a novel application of kriging in the field of industrial metrology. Exploiting the recognized predictive capability of kriging models, we use them to drive the online construction of sequential plans for inspecting industrial parts on coordinate measuring machines. These machines are universally adopted to check the compliance of parts to dimensional and geometric specifications. In two analyzed case studies kriging-based inspection plans outperform fixed-sample plans widespread in industry.
Caratterizzazione numerico sperimentale dei Ruotatori Geometrici nell'Interferometria in luce bianca
Proc. of XXXIV AIAS Conference, Milan, Italy
... E' infatti questa la grandezza di maggior interesse per l'interferometria in luce b... more ... E' infatti questa la grandezza di maggior interesse per l'interferometria in luce bianca, in quanto alcune delle tecniche di ricostruzione si ... SPIE, 1995 [4] Maitreyee Roy, P. Svahn, L. Cherel, and CJR Sheppard Geometric phase-shifting for low-coherence interference microscopy ...
White light interferometry is routinely used for the reconstruction of the micro geometry of mech... more White light interferometry is routinely used for the reconstruction of the micro geometry of mechanical parts when high precision is needed. By this technique, the surface height of each point of the test piece is measured by estimating the abscissa of maximum interference. ...
The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promisi... more The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promising manufacturing technology in the composite materials industry. While former FW uses rigid automation or Cartesian robots to produce medium-to-large size parts with simple axis-symmetric shape, recent introduction of anthropomorphic robots has enabled the manufacture of small-to-medium size parts with complex shape. The potential of the emerging technology, as compared with the conventional one, is evaluated on the basis of an integrated model which predicts how factors defining the product-process-market scenario affect main key performance (capacity, full product cost, return of the investment). The analysis reveals that the new scenario has a high potential as it not only increases product value but also allows for product diversification by exploiting the inherent cell's flexibility. The rationale of the assessment model is general enough to handle different kinds of technologies.
Compensation of CMM geometrical errors by the GEMIL technique: Experimental results
CIRP Annals - Manufacturing Technology, 2014
ABSTRACT
Low-cost interferometric compensation of geometrical errors
CIRP Annals - Manufacturing Technology, 2009
Numerous interferometric techniques to compensate machine geometrical errors have been presented ... more Numerous interferometric techniques to compensate machine geometrical errors have been presented and successfully applied. However, the issue of equipment and labour costs still remains. This project aims at cutting such costs while keeping good metrology. The basic idea of the proposed technique is the interferometric measurement of independent lines: unlike laser trackers and tracers, which measure while pointing, with this
EMUE-D2-5-TraceabilityFromConformity
Measurement traceability is commonly obtained from calibration measurements that provide a result... more Measurement traceability is commonly obtained from calibration measurements that provide a result in terms of a single value and its associated uncertainty. However, there are circumstances where instead, the result may consist of a range of possible values. Such circumstances might arise when a result is provided in the form of the output from a conformity decision process, for example as a conformity statement in which a range of acceptable values rather than a specific value is reported. In terms of metrological traceability this style of result provides less information than a specific value, but it may be sufficient to obtain an acceptable target measurement uncertainty for a given application. The standard ISO/IEC 17025 acknowledges this in informative annex A. This example describes how such information might be used to propagate traceability. Files contained in the dataset are: "EMUE 1.2.5 (Version 5139).zip": Zip file containing tex, bib and image files "A125...
The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promisi... more The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promising manufacturing technology in the composite materials industry. While former FW uses rigid automation or Cartesian robots to produce medium-to-large size parts with simple axis-symmetric shape, recent introduction of anthropomorphic robots has enabled the manufacture of small-to-medium size parts with complex shape. The potential of the emerging technology, as compared with the conventional one, is evaluated on the basis of an integrated model which predicts how factors defining the product-process-market scenario affect main key performance (capacity, full product cost, return of the investment). The analysis reveals that the new scenario has a high potential as it not only increases product value but also allows for product diversification by exploiting the inherent cell’s flexibility. The rationale of the assessment model is general enough to handle different kinds of technologies. 1.
Methods for Quality Improvement in Products and Processes
Description: Robust Design is a statistical methodology based on the use of the information drawn... more Description: Robust Design is a statistical methodology based on the use of the information drawn from experiments on a physical prototype of a system to design (i.e. a product or a process). Many physical processes are so complex that it is difficult or even impossible to study them by conventional experimental methods. These limitations can be overcome by conducting simulated experiments (Computer Experiments) on a reliable and fast simulation model of the product or process. The combination of Robust Design and Computer Experiments can become a key methodology to sustain, in a systematic way, innovation in industrial design, while keeping cost under control. In this book new methodological developments for Robust Design using computer simulations are proposed. These methods have been successfully applied to the design of an optical profilometer, a device used for the high precision reconstruction of the micro-geometry of mechanical parts. The most important result is a significan...
Sampling Point Sequential Determination by Kriging for Tolerance Verification With CMM
Volume 1: Advanced Energy Systems; Advanced and Digital Manufacturing; Advanced Materials; Aerospace, 2008
Coordinate Measuring Machines (CMM) are widely used in industry, mainly for assessing product’s c... more Coordinate Measuring Machines (CMM) are widely used in industry, mainly for assessing product’s compliance to geometrical specifications. They are a de-facto standard for such a control, owing to their high accuracy and flexibility in catering to different measurement tasks with fast and easy setup change. One of the key aspects of any CMM inspection plan, affecting accuracy and cost, is the choice of the measurement strategy, namely the definition of the number and the location of the points sampled on the part’s surface. In the industrial practice, such important decisions are usually left to the experience of qualified operators. A method is presented here, based upon an innovative application of Kriging models to coordinate metrology, that defines an adaptive sampling strategy with the goal of obtaining accurate estimates of form errors using relatively small samples. Exploitation of kriging models (originated for geostatistics investigations, then successfully applied to the se...
New Sampling Procedures in Coordinate Metrology Based on Kriging-Based Adaptive Designs
Statistics for Innovation
This chapter describes an interesting case of process innovation generated by transferring two st... more This chapter describes an interesting case of process innovation generated by transferring two statistical technologies from their native application fields to a different one. The technologies are prediction by Kriging models and sequential experiments, originally developed for geostatistics applications and clinical trials, respectively. The combination of the two, i.e., sequential experiments driven by Kriging predictions, has been successfully applied in
Quality and Reliability Engineering International, 2008
Precision Engineering, 2011
We propose a method for designing inspection plans of small size for use in form error evaluation... more We propose a method for designing inspection plans of small size for use in form error evaluation of parts from batch or mass production using coordinate measuring machines. The method exploits a priori information coming from large sample inspection of one or a few parts of the lot. It is based on a regression model fitted to the large sample. The model is used twice. First, it provides the dominant pattern of the surface. Then, the deviations from the model that are relevant to form error are captured by weighting the points of the convex-hull of the large sample with the regression residuals. Based on two case studies, we show that the method provides a good accuracy in the estimation of straightness and flatness with very few measurement points. Comparative results also indicate that the method outperforms both the typical sampling schemes used in industry (random sampling, latin hypercube sampling), which do not exploit a priori information, and a recently proposed method using the same kind of a priori information.
Measurement, 2009
International comparisons are essential for the mutual recognition of calibration and measurement... more International comparisons are essential for the mutual recognition of calibration and measurement certificates issued by National Metrology Institutes. Current procedures are effective for comparisons involving one measurand only. In the case of multiple measurands, they provide a set of individual results -related to the measurands, taken separately -which are not aggregated into a single overall evaluation. The goal of the paper is to introduce a new performance estimator, which is able to provide an overall assessment of the participants' performance. This estimator is based on a quadratic mean of deviations from corresponding Key Comparison Reference Values (KCRVs), weighted by the inverse of the variances of such deviations. Description is supported by an example application.
The International Journal of Advanced Manufacturing Technology, 2013
In the last two decades, there has been a great development of the measuring systems in the field... more In the last two decades, there has been a great development of the measuring systems in the field of largescale dimensional metrology (LSDM), as also proved by the significant growth of the scientific literature. The aim of this paper is to analyze the LSDM scientific literature, from the dual perspective of scientific articles and patents, and estimate their impact in terms of amount of documents and relevant citations. In detail, this study investigates similarities and differences between articles and patents, as regards their dominant technologies and temporal distribution, and identifies (1) the major scientific journals and conference proceedings containing LSDM articles and (2) the major assignees of LSDM patents. Two main results emerge from the analysis: (a) important inventions concerning new LSDM systems were deposited before the end of twentieth century, while scientific articles have "bloomed" only in the last decade, and (b) the vast majority of patents concern inventions related to the laserinterferometry technology, while articles are divided more evenly among available technologies, with an important role played by the less accurate but more affordable ones, such as photogrammetry or structured-light scanning.
Design for Robustness and Cost Effectiveness: The Case of an Optical Profilometer
Asian Journal on Quality, 2006
The paper presents the design of an optical profilometer, a device used for the reconstruction of... more The paper presents the design of an optical profilometer, a device used for the reconstruction of the micro‐geometry of mechanical parts in applications where high precision is needed. The design is based on Robust Design, a major methodology for quality improvement of engineering systems. Several design solutions, namely different hardware and software setups of the device, are compared in order to select a configuration realising a desired trade‐off between performance and cost. The peculiarity of the dsgin strategy is the use of a computer m odel of the measurement process where the physical part of the process is simulated. This allows for an extensive exploration of the design space, thus opening the way to product innovation.
Applied Stochastic Models in Business and Industry, 2009
Kriging models have been extensively used to predict spatial data in geostatistics and, more rece... more Kriging models have been extensively used to predict spatial data in geostatistics and, more recently, to approximate the output of deterministic simulation. This paper presents a novel application of kriging in the field of industrial metrology. Exploiting the recognized predictive capability of kriging models, we use them to drive the online construction of sequential plans for inspecting industrial parts on coordinate measuring machines. These machines are universally adopted to check the compliance of parts to dimensional and geometric specifications. In two analyzed case studies kriging-based inspection plans outperform fixed-sample plans widespread in industry.
Caratterizzazione numerico sperimentale dei Ruotatori Geometrici nell'Interferometria in luce bianca
Proc. of XXXIV AIAS Conference, Milan, Italy
... E' infatti questa la grandezza di maggior interesse per l'interferometria in luce b... more ... E' infatti questa la grandezza di maggior interesse per l'interferometria in luce bianca, in quanto alcune delle tecniche di ricostruzione si ... SPIE, 1995 [4] Maitreyee Roy, P. Svahn, L. Cherel, and CJR Sheppard Geometric phase-shifting for low-coherence interference microscopy ...
White light interferometry is routinely used for the reconstruction of the micro geometry of mech... more White light interferometry is routinely used for the reconstruction of the micro geometry of mechanical parts when high precision is needed. By this technique, the surface height of each point of the test piece is measured by estimating the abscissa of maximum interference. ...
The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promisi... more The paper presents a model for managerial assessment of Robotic Filament Winding (RFW), a promising manufacturing technology in the composite materials industry. While former FW uses rigid automation or Cartesian robots to produce medium-to-large size parts with simple axis-symmetric shape, recent introduction of anthropomorphic robots has enabled the manufacture of small-to-medium size parts with complex shape. The potential of the emerging technology, as compared with the conventional one, is evaluated on the basis of an integrated model which predicts how factors defining the product-process-market scenario affect main key performance (capacity, full product cost, return of the investment). The analysis reveals that the new scenario has a high potential as it not only increases product value but also allows for product diversification by exploiting the inherent cell's flexibility. The rationale of the assessment model is general enough to handle different kinds of technologies.
Compensation of CMM geometrical errors by the GEMIL technique: Experimental results
CIRP Annals - Manufacturing Technology, 2014
ABSTRACT
Low-cost interferometric compensation of geometrical errors
CIRP Annals - Manufacturing Technology, 2009
Numerous interferometric techniques to compensate machine geometrical errors have been presented ... more Numerous interferometric techniques to compensate machine geometrical errors have been presented and successfully applied. However, the issue of equipment and labour costs still remains. This project aims at cutting such costs while keeping good metrology. The basic idea of the proposed technique is the interferometric measurement of independent lines: unlike laser trackers and tracers, which measure while pointing, with this