Overall non-linear correction of phase shifting mechanism in white light interferometry system based on displacement feedback control combined with fuzzy PID control

Ningfang Song; Xinkai Luo; Huipeng Li; Jiao Li

doi:10.1117/12.2199693

8 October 2015 Overall non-linear correction of phase shifting mechanism in white light interferometry system based on displacement feedback control combined with fuzzy PID control

Ningfang Song, Xinkai Luo, Huipeng Li, Jiao Li

Author Affiliations +

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96771J (2015) https://doi.org/10.1117/12.2199693
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

The non-linearity of the phase shifting mechanism in white light interferometry system can seriously affect the measuring accuracy of the system. In this paper, the correcting method is to combine the displacement feedback control technology with the fuzzy PID control technology. Displacement feedback control mechanism and fuzzy PID controller are designed and then try to figure it out through Matlab simulation and experiment.. The result shows that combining the displacement feedback control technology with the fuzzy PID control technology can fulfill decent overall non-linear correction in the white light interferometry measuring system. Meanwhile, the accuracy of the correction is high and the non-linearity drop from 2% to 0.1%.

Citation Download Citation

Ningfang Song, Xinkai Luo, Huipeng Li, and Jiao Li "Overall non-linear correction of phase shifting mechanism in white light interferometry system based on displacement feedback control combined with fuzzy PID control", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771J (8 October 2015); https://doi.org/10.1117/12.2199693

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