Piston Error Measurement for Segmented Telescopes with an Artificial Neural Network [PDF]
Sensors, 2021 A piston error detection method is proposed based on the broadband intensity distribution on the image plane using a back-propagation (BP) artificial neural network.
Dan Yue, Yihao He, Yushuang Li
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Piston Error Measurement for Segmented Telescopes Based on a Hybrid Artificial Neural Network [PDF]
Sensors, 2023 To address the difficulty and complexity of detecting piston errors for segmented telescopes, this paper proposes a new piston error measurement method based on a hybrid artificial neural network.
Dan Yue +3 more
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Piston Error Automatic Correction for Segmented Mirrors via Deep Reinforcement Learning [PDF]
SensorsThe segmented mirror co-phase error identification technique based on supervised learning methods has the advantages of simple application conditions, no dependence on custom sensors, a fast calculation speed, and low computing power requirements ...
Dequan Li, Dong Wang, Dejie Yan
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Piston Error Extraction from Dual-Wavelength Interference Patterns Using Phase Retrieval Technique [PDF]
Photonics, 2022 As next-generation large-aperture telescopes, synthetic aperture is a promising method for realizing high resolution observations. Co-phasing the misaligned segmented aperture is an important procedure for high-resolution observations with segmented ...
Xiaoyang Li +4 more
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THE MECHANISM OF FORMATION OF ERRORS MACHINING OF THE PISTON AND CONNECTING ROD [PDF]
Вестник Дагестанского государственного технического университета: Технические науки, 2016 Researches allowing to expose the mechanism of error formation of the axial piston sizes of ship small-sized diesels rods for the purpose of improvement of production process technology and stabilization of geometrical parameters are given.
N. K. Sanaev
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Large Piston Error Detection Method Based on the Multiwavelength Phase Shift Interference and Dynamic Adjustment Strategy [PDF]
Photonics, 2022 As the loading space in rockets and mirror fabrication technology is limited, optical systems in space cannot have large optical apertures. However, the successful launch and excellent performance of the James Webb Telescope indicate that segmented ...
Rongjie Qin +3 more
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A Tip–Tilt and Piston Detection Approach for Segmented Telescopes [PDF]
Photonics, 2020 Accurate segmented mirror wavefront sensing and control is essential for next-generation large aperture telescope system design. In this paper, a direct tip–tilt and piston error detection technique based on model-based phase retrieval with multiple ...
Shun Qin, Wai Kin Chan
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Piston Detection of Optical Sparse Aperture Systems Based on an Improved Phase Diversity Method [PDF]
Photonics, 2023 The piston error has a significant effect on the imaging resolution of the optical sparse aperture system. In this paper, an improved phase diversity method based on particle swarm optimization and the sequential quadratic programming algorithm is ...
Yang Zhao +5 more
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A Cyclic Self-Calibration Method Based on a High-Precision Piston and Standard-Meter Water Flow Prover [PDF]
SensorsThe standard meter water flow prover is widely used due to its mature technology and high work efficiency. However, the process of sending the standard meter for calibration is not only time-consuming and laborious but also introduces deviations due to ...
Xuemei Geng +7 more
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Dynamic Response Analysis of the Bi-Tandem Axial Piston Pump with Dual-Loop Positive Flow Control under Pressure Disturbance [PDF]
Actuators, 2023 The bi-tandem axial piston pump is an indispensable powerhouse in high-pressure and high-power engineering hydraulic systems, with its output flow response characteristics under pressure disturbance exerting a significant influence on the working process
Zhiyuan Sun +3 more
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