High-bandwidth tip-tilt vibration compensation in telescope systems

Sinn, Andreas; Riel, Thomas; Deisl, Florian; Schachner, Stephan; Schitter, Georg

doi:10.1016/j.ifacol.2019.11.733

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…A proportional-integral feedback control algorithm with feedforward input was implemented to compensate the tilt error while suppressing the inherent hysteresis effect of the piezoelectric actuator of fast steering mirror. 31,32 The oscilloscope is used to record the tilt error from the PSDM sensor while the fast steering mirror stands by and starting the compensation at specified time set by user.…”

Section: Feedback Control Test Of Fast Steering Mirrormentioning

confidence: 99%

Development of piezoelectric fast steering mirror with tilt error compensation for portable spectroscopic sensor

Kim

Lee

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Fast steering mirror, a key component that can compensate for the distortion of the optical axis, plays an essential role in portable spectroscopic sensors. Because the performance of the fast steering mirror has a great influence on the accuracy of the interferometer in the spectroscopic sensor, it is important to verify whether it can satisfy the design requirements by evaluating the performance. In this study, a piezoelectric fast steering mirror with high-resolution and high-speed tilting capability for a portable spectroscopic sensor was fabricated and tested. Design requirements such as steering angle, resolution, and frequency range were set for portable spectroscopic sensors and elastic guide structures actuated by piezoelectric actuators were proposed. Before fabrication, the performances of the proposed fast steering mirror were examined by the finite element method. To verify the proposed fast steering mirror, a prototype was manufactured with a size of 24.5 mm × 24.5 mm × 37.4, including a mirror with a diameter of 20 mm and thickness of 3 mm. This prototype can provide the sufficient convenience for mounting on a spectroscopic sensor for gas monitoring at a distance. Its performance was tested, confirming a steering range of 0.56°, resolution of 1.27 µrad seconds and natural frequency of 282 Hz. In addition, through a performance evaluation test using a visible light laser on an optical test bed, the ability to compensate the tilt error within a few seconds was confirmed for its applicability to actual spectroscopic interferometer products in the future.

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Section: Feedback Control Test Of Fast Steering Mirrormentioning

confidence: 99%

Development of piezoelectric fast steering mirror with tilt error compensation for portable spectroscopic sensor

Kim

Lee

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…A photoelectric tracking system is a multidisciplinary technology integrating light, a machine, and electricity; this device is mainly used in photoelectric measurement, astronomical observation, laser communication, and other fields [1][2][3][4]. The composite-axis photoelectric tracking technology is a high-precision tracking control technology used in a photoelectric tracking system.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Variable-Stiffness Fast-Steering Mirror

Luo,

Mao,

Dai

et al. 2023

Actuators

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The non-variable stiffness of the flexible hinge in the fast-steering mirror (FSM) cannot adapt to varying load demands. To address this issue, this paper presents an innovative variable-stiffness rotational mechanism designed for use with FSMs. Firstly, the working principle of the variable-stiffness mechanism is introduced, and the influence of the length of each structure on the stiffness and the nonlinear influence are analyzed. Then, the variable-stiffness mechanism is applied to the FSM for the variable-stiffness experiment and variable-load experiment. The experimental results show that the variable-stiffness mechanism designed in this paper can realize the change in stiffness. The errors between the experimental value and the theoretical value of the three sets of experiments are +5.72%, +7.57%, and +6.57%. The FSM’s stiffness nonlinearity is very small, and the resonance frequency of the FSM before and after increasing the load can be consistent. The variable-stiffness mechanism can change the frequency characteristics by changing the rotational stiffness of the FSM.

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