Sub-regional wavefront hybrid algorithm for limited actuators deformable mirror

Meng, Yonggang; Huang, Lei; Sun, Licheng; Fan, Junbiao

doi:10.1016/j.optcom.2018.05.084

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…In the adaptive optics system, in addition to the low-frequency broadband disturbance, the highfrequency narrow-band disturbance caused by high-intensity atmospheric turbulence disturbance, vibration devices, or the optical platform itself has an increasingly prominent impact on the system performance. [1][2][3][4] These high-frequency narrow-band disturbances mainly affect higher-order modes and severely limit the performance of deformable mirror (DM) control systems. At present, most DM control systems still use the classical proportional-integral-differential (PID) algorithm.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear active disturbance rejection control for deformable mirror

Chen,

Zhang,

Zhou

et al. 2023

Opt. Eng.

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.The disturbance in the adaptive optical system includes not only the low-frequency broadband disturbance but also the high-frequency narrow-band disturbance caused by the vibration of system components and atmospheric turbulence. A nonlinear active disturbance rejection control (NLADRC) method is proposed to solve the control problem of a deformable mirror under high-frequency narrow-band disturbance. This method does not completely depend on the mathematical model, and the algorithm structure is simple. The differential tracker flattens the abrupt part of the signal, and the extended state observer is used to estimate the disturbance in real time. Finally, the nonlinear control rate is used to compensate the disturbance. The simulation results show that compared with the classical PID control and the classical linear active disturbance rejection control, the NLADRC method can effectively improve the bandwidth of the control system and show good suppression performance against high-frequency narrow-band disturbance, and the system is more robust. Both in time domain and frequency domain, it can accurately track the system state, reduce the system delay and system error, and has better dynamic performance.

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Section: Introductionmentioning

confidence: 99%

Nonlinear active disturbance rejection control for deformable mirror

Chen,

Zhang,

Zhou

et al. 2023

Opt. Eng.

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“…One way to solve the problem of deformation of optical elements is to propose appropriate methods to reduce or compensate the deformation based on an examination of the deformed optical surface. The deformed optical surface is usually simulated using finite element calculation [5,6] or measured using an interferometer [7][8][9], and the deformed optical surface is described based on the results of the calculation or the measurement. The methods used to describe the deformed surface vary depending on the optical requirements.…”

Section: Introductionmentioning

confidence: 99%

Calculating the area of a particular deformation region of an optical surface based on the finite element method

2023

J. Opt.

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To study the deformation of an optical surface and its effect on optical performance, a method based on the finite element method for calculating the area of a particular deformation region of an optical surface is proposed, and a concept of effective area ratio is further introduced to describe the effect of deformation on optical performance. The principle of the method is presented, and the deformation of a potassium dihydrogen phosphate (KH2PO4, KDP) crystal is studied using this method, while the calculation accuracy is discussed. The results demonstrate that the method and the concept of effective area ratio are available for studying the deformation of an optical surface and its effect on optical performance.

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