Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope
The present work reports the evaluation of a sliding mode observer (SMO) for a passive interferometric fiber-optic gyroscope (IFOG). To achieve that, the experimental setup was designed and evaluated to provide two out-of-phase signals as required by the SMO system employed. This led to the operatio...
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MDPI AG
2025-05-01
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| author | Gabriel F. S. Nunes João M. S. Sakamoto |
| author_facet | Gabriel F. S. Nunes João M. S. Sakamoto |
| author_sort | Gabriel F. S. Nunes |
| collection | DOAJ |
| description | The present work reports the evaluation of a sliding mode observer (SMO) for a passive interferometric fiber-optic gyroscope (IFOG). To achieve that, the experimental setup was designed and evaluated to provide two out-of-phase signals as required by the SMO system employed. This led to the operation of the IFOG-SMO implemented in a passive mode with a 3 × 3 optical fiber directional coupler, which dismissed the use of optical phase modulators, such as piezoelectric or electro-optic devices. Simulations were performed and provided a qualitative analysis of the dependence of the system gain as a function of the sigmoid factor and sample rate, which resulted in a method for tuning the gain value according to the expected input signal. The experimental results show proper working of the IFOG-SMO and the capability for measuring large and small amplitude angular velocities and the expansion of the full scale. This is, to the best of our knowledge, the first time a sliding mode control technique has been employed and evaluated for an interferometric fiber-optic gyroscope. |
| format | Article |
| id | doaj-art-c445a14d103f429b9238aee96e7b58d6 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-c445a14d103f429b9238aee96e7b58d62025-08-20T03:11:20ZengMDPI AGSensors1424-82202025-05-012511338510.3390/s25113385Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic GyroscopeGabriel F. S. Nunes0João M. S. Sakamoto1Graduate Program in Science and Space Technologies, Aeronautics Institute of Technology (ITA), São José dos Campos 12228-900, SP, BrazilDivision of Photonics, Institute for Advanced Studies (IEAv), São José dos Campos 12228-001, SP, BrazilThe present work reports the evaluation of a sliding mode observer (SMO) for a passive interferometric fiber-optic gyroscope (IFOG). To achieve that, the experimental setup was designed and evaluated to provide two out-of-phase signals as required by the SMO system employed. This led to the operation of the IFOG-SMO implemented in a passive mode with a 3 × 3 optical fiber directional coupler, which dismissed the use of optical phase modulators, such as piezoelectric or electro-optic devices. Simulations were performed and provided a qualitative analysis of the dependence of the system gain as a function of the sigmoid factor and sample rate, which resulted in a method for tuning the gain value according to the expected input signal. The experimental results show proper working of the IFOG-SMO and the capability for measuring large and small amplitude angular velocities and the expansion of the full scale. This is, to the best of our knowledge, the first time a sliding mode control technique has been employed and evaluated for an interferometric fiber-optic gyroscope.https://www.mdpi.com/1424-8220/25/11/3385interferometric fiber-optic gyroscope3 × 3 optical fiber couplersliding mode observersliding mode controlcontrol gain |
| spellingShingle | Gabriel F. S. Nunes João M. S. Sakamoto Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope Sensors interferometric fiber-optic gyroscope 3 × 3 optical fiber coupler sliding mode observer sliding mode control control gain |
| title | Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope |
| title_full | Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope |
| title_fullStr | Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope |
| title_full_unstemmed | Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope |
| title_short | Sliding Mode Observer with Gain Tuning Method for Passive Interferometric Fiber-Optic Gyroscope |
| title_sort | sliding mode observer with gain tuning method for passive interferometric fiber optic gyroscope |
| topic | interferometric fiber-optic gyroscope 3 × 3 optical fiber coupler sliding mode observer sliding mode control control gain |
| url | https://www.mdpi.com/1424-8220/25/11/3385 |
| work_keys_str_mv | AT gabrielfsnunes slidingmodeobserverwithgaintuningmethodforpassiveinterferometricfiberopticgyroscope AT joaomssakamoto slidingmodeobserverwithgaintuningmethodforpassiveinterferometricfiberopticgyroscope |