ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers
| Autor: | Daniel S. Sawyer, Bruce R. Borchardt, Christopher J. Blackburn, William T. Estler, Steven D. Phillips, Balasubramanian Muralikrishnan |
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| Rok vydání: | 2008 |
| Předmět: |
Test strategy
Computer simulation business.industry Computer science media_common.quotation_subject General Engineering Spherical coordinate system misalignments geometric errors Article performance evaluation laser tracker Length measurement Optics sensitivity analysis Laser tracker ASME B89.4.19 Range (statistics) Sensitivity (control systems) Eccentricity (behavior) business Algorithm media_common |
| Zdroj: | Journal of Research of the National Institute of Standards and Technology |
| ISSN: | 1044-677X |
| Popis: | Small and unintended offsets, tilts, and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings) and possibly in the calculated lengths of reference artifacts. It is desirable that the tests described in the ASME B89.4.19 Standard [1] be sensitive to these geometric misalignments so that any resulting systematic errors are identified during performance evaluation. In this paper, we present some analysis, using error models and numerical simulation, of the sensitivity of the length measurement system tests and two-face system tests in the B89.4.19 Standard to misalignments in laser trackers. We highlight key attributes of the testing strategy adopted in the Standard and propose new length measurement system tests that demonstrate improved sensitivity to some misalignments. Experimental results with a tracker that is not properly error corrected for the effects of the misalignments validate claims regarding the proposed new length tests. |
| Databáze: | OpenAIRE |
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