Robust positioning for measurement of freeform surfaces

Shixiang Wang, Chi Fai Cheung, Minjun Ren, Minyu Liu, Chenyang Zhao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Form characterization of a manufactured freeform surface can be conducted by aligning the sampling points on a manufactured surface and comparing that with the design geometry through the localization. In this paper, a robust localization method named fiducial aided positioning method (FAPM) is developed to evaluate freeform surfaces with high efficiency and precision. The FAPM method makes use of fiducials to form a Fiducial-aided Computer Aided Design (FA-CAD) of the freeform surface which not only establishes an inherent surface feature but also links the different coordinate systems among design coordinate frame, machine tool and the measurement instrument. To verify the capability of the proposed method, a series of experiments have been undertaken. As compared with the traditional freeform measurement method such as least squared method, it is interesting to note that the robustness and accuracy of the measurement is significantly enhanced by the FAPM.
Original languageEnglish
Title of host publicationASPEN/ASPE Spring Topical Meeting on Manufacture and Metrology of Structured and Freeform Surfaces for Functional Applications
PublisherAsian Society for Precision Engineering and Nanotechnology (ASPEN)/American Society for Precision Engineering (ASPE)
Publication statusPublished - 1 Jan 2017
EventASPEN/ASPE 2017 Spring Topical Meeting on Manufacture and Metrology of Structured and Freeform Surfaces for Functional Applications - Hong Kong Polytechnic University, Hong Kong, Hong Kong
Duration: 14 Mar 201717 Mar 2017

Conference

ConferenceASPEN/ASPE 2017 Spring Topical Meeting on Manufacture and Metrology of Structured and Freeform Surfaces for Functional Applications
CountryHong Kong
CityHong Kong
Period14/03/1717/03/17

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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