Wide dynamic range quadrature interferometer with high-gain approach and sliding mode control

Felão, Luiz H.V. [UNESP]; Martin, Roberta I. [UNESP]; Sakamoto, João M.S.; Teixeira, Marcelo C.M. [UNESP]; Kitano, Cláudio [UNESP]

Wide dynamic range quadrature interferometer with high-gain approach and sliding mode control

Data

2019-09-02

Autores

Felão, Luiz H.V.

Martin, Roberta I.

Sakamoto, João M.S.

Teixeira, Marcelo C.M.

Kitano, Cláudio

Tipo

Artigo

Direito de acesso

Acesso aberto

Resumo

The present work concerns with the modeling, development and application of a novel control strategy based on sliding mode control for two beam quadrature interferometers, with the high-gain approach. In this case, by reading the control signal, the demodulation process does not require phase unwrapping algorithms, i.e., the output signal presents a straight-line relationship with the interferometer total phase shift. This system was implemented in a digital platform to control a bulk Michelson interferometer whose performance was experimentally determined, showing its capability on achieving real-time measurement and presenting wider dynamic range and bandwidth (52.5 rad in low frequencies and 5.8 rad up to 500 Hz) when compared with the literature. Moreover, this performance can be improved even further by simply increasing the feedback gain.