Influence of measurement noise and laser arrangement on measurement uncertainty of laser tracker multilateration in machine tool volumetric verification

Aguado, Sergio; Santolaria, Jorge; Samper, David; Aguilar, Juan José

doi:10.1016/j.precisioneng.2013.03.006

Cited by 42 publications

(47 citation statements)

References 23 publications

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“…Multilateration based approach is by far the most research technique to determine the geometric errors of large manufacturing or measuring systems nowadays [7,26,[105][106][107][108][109][110][111][112]. The approach relies on interferometric displacement measurements between reference points that are fixed to the machine base and offset points fixed to the machine spindle, near to the TCP [113].…”

Section: Indirect Measurement Methodsmentioning

confidence: 99%

“…Several uncertainty sources shall be considered for a complete uncertainty assessment in a sequential multilateration process [108]:…”

Section: Indirect Measurement Methodsmentioning

confidence: 99%

“…Aguado et al developed an approach where several commercial laser trackers are employed for sequential multilateration measurement [108]. The adopted technical solution is similar to the solution developed by Olarra et al, where laser trackers are applied to acquire information and multilateration is employed to sort out the mathematical issue.…”

Section: Indirect Measurement Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Traceability on Machine Tool Metrology: A Review

Mutilba¹,

Gomez-Acedo²,

Kortaberria³

et al. 2017

Preprint

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Errors during manufacture of high value components are not acceptable nowadays in driving industries such as energy and transportation. Sectors such as aerospace, automotive, shipbuilding, nuclear power, large science facilities or wind power manufacture complex and accurate components that demand close measurements and fast feedback into manufacturing processes. New measuring technologies are already available in machine tools, including integrated touch probes and fast interface capabilities. They shall provide the possibility to measure the workpiece during or after the manufacturing process, maintaining the original setup of the workpiece and avoiding the manufacturing process from being interrupted to transport the workpiece to a measuring position. However, the traceability of the measurement process on a machine tool is not ensured yet and measurement data is still not fully reliable for process control or product validation. Due to the similarity between a coordinate measuring machine and a machine tool, some of the methods applied for a correct assessment of uncertainty in coordinate measuring machines are adapted to the challenges of a machine tool. The scientific objective is to determine the uncertainty on a machine tool measurement and, in this way, convert it into a machine integrated traceable measuring process. This paper reviews the fundamentals of machine tool metrology.

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Section: Indirect Measurement Methodsmentioning

confidence: 99%

“…Several uncertainty sources shall be considered for a complete uncertainty assessment in a sequential multilateration process [108]:…”

Section: Indirect Measurement Methodsmentioning

confidence: 99%

Section: Indirect Measurement Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Traceability on Machine Tool Metrology: A Review

Mutilba¹,

Gomez-Acedo²,

Kortaberria³

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…The equations system defined by LT coordinates can be solved analytically. However, the most useful technique, thanks to its accuracy, is trilateration using optimization [14,15]. This technique is based on an iterative process of parameter identification.…”

Section: Traditional Trilateration Techniquementioning

confidence: 99%

“…The difference is calculated in the LT coordinates system, with (Xi, Yi, Zi) coordinates of the LT in the reference coordinate system (Figure 4). Parameters to be identified in the optimization process can be reduced if a new reference system of the LT is created as shown in Figure 4 [14,15]. Therefore, parameters to be identified are the LT positions X1, X2, and Y2, and the multilateralized coordinates xm,j, ym,j, and zm,j with j = 1 n (n = number of points).…”

Section: Traditional Trilateration Techniquementioning

confidence: 99%

Adequacy of Technical and Commercial Alternatives Applied to Machine Tool Verification Using Laser Tracker

et al. 2016

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Besides presenting a volumetric verification technique that allows characterization of the different geometric errors of a machine tool (MT) depending on its kinematic chain and geometry through a kinematic model, this paper investigates the influence of measurement tools and techniques available on the final accuracy of the MT. Volumetric verification based on a laser tracker (LT) relates the coordinates of the tool with the coordinates of the LT, including it into the kinematic model. Using a non-lineal optimization process, approximation functions that characterize the joint influence of MT geometric errors are obtained. However, measurement data will be affected by previous compensation of the MT, the accuracy of the measurement system, LT measurement technology, the type of retroreflector used, and techniques used to improve data accuracy, among other sources of errors. This paper studies the adequacy of different commercial alternatives such as: retroreflectors, LTs from different manufacturers, etc., that can be applied in MT verification using a long-range MT. As the accuracy is strongly affected by the uncertainty of its angular encoders, the multilateration technique tries to improve data accuracy using only LT radial information. Nonetheless, a new bundle adjustment which uses radial and angular information is presented in current metrology software. This paper studies both techniques and analyzes their adequacy for MT verification too.

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Laser Instrumentation and Calibration

Smith

2016

Machine Tool Metrology

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Influence of measurement noise and laser arrangement on measurement uncertainty of laser tracker multilateration in machine tool volumetric verification

Cited by 42 publications

References 23 publications

Traceability on Machine Tool Metrology: A Review

Traceability on Machine Tool Metrology: A Review

Adequacy of Technical and Commercial Alternatives Applied to Machine Tool Verification Using Laser Tracker

Laser Instrumentation and Calibration

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