Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities
The optical reference cavity in an ultrastable laser is sensitive to vibrations; the microvibrations in a space platform affect the accuracy and stability of such lasers. In this study, an active vibration isolation controller is proposed to reduce the effect of vibrations on variations in the cavit...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/23/1/302 |
| _version_ | 1797431207508574208 |
|---|---|
| author | Yuchen Qian Yong Xie Jianjun Jia Liang Zhang |
| author_facet | Yuchen Qian Yong Xie Jianjun Jia Liang Zhang |
| author_sort | Yuchen Qian |
| collection | DOAJ |
| description | The optical reference cavity in an ultrastable laser is sensitive to vibrations; the microvibrations in a space platform affect the accuracy and stability of such lasers. In this study, an active vibration isolation controller is proposed to reduce the effect of vibrations on variations in the cavity length and improve the frequency stability of ultrastable lasers. Based on the decentralized control strategy, we designed a state-differential feedback controller with a linear quadratic regulator (LQR) and added a disturbance observer (DOB) to estimate the source noise. Experiments were conducted using an active vibration isolation system; the results verified the feasibility and performance of the designed controller. The accelerations along the axis (Z-, X-, Y-) directions were suppressed in the low-frequency band within 200 Hz, and the root-cumulative power spectral densities (PSDs) declined to 1.17 × 10<sup>−5</sup>, 7.16 × 10<sup>−6</sup>, and 8.76 × 10<sup>−6</sup> g. This comprehensive vibration met the requirements of an ultrastable laser. |
| first_indexed | 2024-03-09T09:40:38Z |
| format | Article |
| id | doaj.art-4585ec18d04546d9a478ffae08c5bf74 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T09:40:38Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4585ec18d04546d9a478ffae08c5bf742023-12-02T00:55:21ZengMDPI AGSensors1424-82202022-12-0123130210.3390/s23010302Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference CavitiesYuchen Qian0Yong Xie1Jianjun Jia2Liang Zhang3Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaThe optical reference cavity in an ultrastable laser is sensitive to vibrations; the microvibrations in a space platform affect the accuracy and stability of such lasers. In this study, an active vibration isolation controller is proposed to reduce the effect of vibrations on variations in the cavity length and improve the frequency stability of ultrastable lasers. Based on the decentralized control strategy, we designed a state-differential feedback controller with a linear quadratic regulator (LQR) and added a disturbance observer (DOB) to estimate the source noise. Experiments were conducted using an active vibration isolation system; the results verified the feasibility and performance of the designed controller. The accelerations along the axis (Z-, X-, Y-) directions were suppressed in the low-frequency band within 200 Hz, and the root-cumulative power spectral densities (PSDs) declined to 1.17 × 10<sup>−5</sup>, 7.16 × 10<sup>−6</sup>, and 8.76 × 10<sup>−6</sup> g. This comprehensive vibration met the requirements of an ultrastable laser.https://www.mdpi.com/1424-8220/23/1/302microvibrationactive vibration isolationlinear quadratic regulator controldisturbance observer |
| spellingShingle | Yuchen Qian Yong Xie Jianjun Jia Liang Zhang Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities Sensors microvibration active vibration isolation linear quadratic regulator control disturbance observer |
| title | Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities |
| title_full | Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities |
| title_fullStr | Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities |
| title_full_unstemmed | Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities |
| title_short | Design of Active Vibration Isolation Controller with Disturbance Observer-Based Linear Quadratic Regulator for Optical Reference Cavities |
| title_sort | design of active vibration isolation controller with disturbance observer based linear quadratic regulator for optical reference cavities |
| topic | microvibration active vibration isolation linear quadratic regulator control disturbance observer |
| url | https://www.mdpi.com/1424-8220/23/1/302 |
| work_keys_str_mv | AT yuchenqian designofactivevibrationisolationcontrollerwithdisturbanceobserverbasedlinearquadraticregulatorforopticalreferencecavities AT yongxie designofactivevibrationisolationcontrollerwithdisturbanceobserverbasedlinearquadraticregulatorforopticalreferencecavities AT jianjunjia designofactivevibrationisolationcontrollerwithdisturbanceobserverbasedlinearquadraticregulatorforopticalreferencecavities AT liangzhang designofactivevibrationisolationcontrollerwithdisturbanceobserverbasedlinearquadraticregulatorforopticalreferencecavities |