A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope
The position accuracy of the third mirror’s Z axis will directly affect the measurement accuracy of the optical telescope, so it is necessary to improve the position accuracy. In order to improve the control performances of the third mirror’s Z-axis of a large optical telescope...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2023-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10250792/ |
| _version_ | 1827808908992839680 |
|---|---|
| author | Wenlin Zhou Kun Xie Junzhang Qian Mo Xia Yi Pu Jinlong Huang Xin Li |
| author_facet | Wenlin Zhou Kun Xie Junzhang Qian Mo Xia Yi Pu Jinlong Huang Xin Li |
| author_sort | Wenlin Zhou |
| collection | DOAJ |
| description | The position accuracy of the third mirror’s Z axis will directly affect the measurement accuracy of the optical telescope, so it is necessary to improve the position accuracy. In order to improve the control performances of the third mirror’s Z-axis of a large optical telescope, this paper proposes a novel control algorithm based on hyperbolic tangent function (tanh). The proposed algorithm is used to replace the traditional integral separated proportional-integral (IS-PI) controller which is widely used in industry servo control system. Firstly, a mathematical model of the third mirror’s Z-axis is established. Secondly, a controller based on tanh is proposed, and the characteristics and stability of the algorithm are analyzed. Thirdly, the parameters tuning method of the proposed algorithm is given. The simulation results show that the proposed algorithm has higher tracking accuracy than IS-PI controller. Finally, experiments are carried out on a large optical telescope’s Z axis. In the experiments, IS-PI controller and tanh controller are compared, and the results show that the control performances are greatly improved. |
| first_indexed | 2024-03-11T22:34:29Z |
| format | Article |
| id | doaj.art-f7446cb6b6eb4c8c9700c76bf8b2c18c |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-11T22:34:29Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f7446cb6b6eb4c8c9700c76bf8b2c18c2023-09-22T23:00:38ZengIEEEIEEE Access2169-35362023-01-011110096310097410.1109/ACCESS.2023.331511810250792A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical TelescopeWenlin Zhou0https://orcid.org/0000-0002-2799-7600Kun Xie1Junzhang Qian2Mo Xia3Yi Pu4Jinlong Huang5https://orcid.org/0000-0002-0846-0429Xin Li6https://orcid.org/0000-0002-3385-3611Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaXi’an Satellite Control Center, Xi’an, ChinaInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, ChinaThe position accuracy of the third mirror’s Z axis will directly affect the measurement accuracy of the optical telescope, so it is necessary to improve the position accuracy. In order to improve the control performances of the third mirror’s Z-axis of a large optical telescope, this paper proposes a novel control algorithm based on hyperbolic tangent function (tanh). The proposed algorithm is used to replace the traditional integral separated proportional-integral (IS-PI) controller which is widely used in industry servo control system. Firstly, a mathematical model of the third mirror’s Z-axis is established. Secondly, a controller based on tanh is proposed, and the characteristics and stability of the algorithm are analyzed. Thirdly, the parameters tuning method of the proposed algorithm is given. The simulation results show that the proposed algorithm has higher tracking accuracy than IS-PI controller. Finally, experiments are carried out on a large optical telescope’s Z axis. In the experiments, IS-PI controller and tanh controller are compared, and the results show that the control performances are greatly improved.https://ieeexplore.ieee.org/document/10250792/High precision position controlmotor controlhyperbolic tangent functionoptical telescopeintegral separation proportional integral |
| spellingShingle | Wenlin Zhou Kun Xie Junzhang Qian Mo Xia Yi Pu Jinlong Huang Xin Li A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope IEEE Access High precision position control motor control hyperbolic tangent function optical telescope integral separation proportional integral |
| title | A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope |
| title_full | A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope |
| title_fullStr | A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope |
| title_full_unstemmed | A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope |
| title_short | A Tanh Control Method for the Third Mirror’s Z Axis of Large Optical Telescope |
| title_sort | tanh control method for the third mirror x2019 s z axis of large optical telescope |
| topic | High precision position control motor control hyperbolic tangent function optical telescope integral separation proportional integral |
| url | https://ieeexplore.ieee.org/document/10250792/ |
| work_keys_str_mv | AT wenlinzhou atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT kunxie atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT junzhangqian atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT moxia atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT yipu atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT jinlonghuang atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT xinli atanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT wenlinzhou tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT kunxie tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT junzhangqian tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT moxia tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT yipu tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT jinlonghuang tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope AT xinli tanhcontrolmethodforthethirdmirrorx2019szaxisoflargeopticaltelescope |