Estimate of the effect of micro-vibration on the performance of the Algerian satellite (Alsat-1B) imager

Serief, Chahira

doi:10.1016/j.optlastec.2017.05.035

Cited by 31 publications

(7 citation statements)

References 5 publications

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“…Integrated analysis supports structure design and verification of high-level optical requirements for image quality and sensitivity [26,27,28]. It can also extrapolate the effect of microvibrations on opto-mechanical stability [29].…”

Section: Simulationmentioning

confidence: 99%

Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements

Chen

Xuan

Zhang

et al. 2019

Sensors

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The present study uses a method to address microvibrations effects on an optical satellite by combining simulations and experiments based on high-precision acceleration sensors. The displacement and angular displacement of each optical component can be obtained by introducing flywheel perturbation data from a six-component test bench to the finite element model of the optical satellite. Combined with an optical amplification factor inferred from the linear optical model, the pixel offset of the whole optical system is calculated. A high accuracy and broad frequency range for a new microvibration measurement experimental system is established to validate the simulation. The pixel offset of the whole optical system can be measured by testing the acceleration signals of each optical component and calculating optical amplification factors. The results are consistent with optical imaging test results, indicating correctness of the experimental scheme and the effectiveness of the simulation. The results suggest that the effect of microvibrations on a camera can be verified by using mechanical simulators instead of a whole optical camera for the experiment scheme, which is demonstrated to be an effective way for increasing efficiency in jitter measurements.

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Section: Simulationmentioning

confidence: 99%

Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements

Chen

Xuan

Zhang

et al. 2019

Sensors

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“…For example, Dae-Oen and Jae-Hung 21 proposed a comprehensive framework, which integrated the state-space model of the modal structure and the Cassegrain reflector model to evaluate the reaction wheel's perturbation on the performance of optical payloads. Serief 22 quantitatively estimated the microvibration effects on the performance of the Alsat-1B imager using modulation transfer function and ground microvibration test results. Qin et al 23 optimized the microvibration isolation system by establishing a dynamic model coupling the optical payload of the telescope and the on-orbit platform.…”

Section: Introductionmentioning

confidence: 99%

Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Li,

Guo,

Qin

et al. 2024

Opt. Eng.

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Accurately assessing the microvibration effects on the line-of-sight (LOS) stability for the space laser communication terminal (LCT) is crucial for ensuring the long-term stability of communication links. To address this challenge, an integrated modeling approach is proposed to analyze the microvibration effects on the LOS stability for the space LCT. First, the LCT's finite-element model, consisting of the off-axis telescope antenna and the rear optical path, is built to extract the nodes' data of each surface on the optical element under the microvibration. Then the dual quaternion, which could avoid the solution error and insufficient generalization ability of the traditional least squares method, is used to calculate the surface's rigid body displacement on the optical element. Furthermore, combined with the LCT's optical sensitivity matrix obtained by the regression analysis method, the LOS jitter of the terminal is calculated to evaluate the LCT's stability and guide the structural optimization. Finally, a test is conducted to validate the reliability of the integrated modeling approach. Simulation and experimental results show that the method proposed can further improve the accuracy of analysis and guide the structural optimization of LCT.

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“…The pointing stability of the high-power laser beam is closely related to the optics comprising the system, and a tiny perturbation in the optics would affect the beam stability during its long-distance transmission [4][5][6]. For instance, the tilt and decentering of the surfaces affect the lens system performance [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of misaligned optics effects on beam pointing stability in dual-pass optical system

Li,

Chen,

Zhang

et al. 2024

Phys. Scr.

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The high-power laser device utilizes a multi-pass amplification system to achieve elevated power laser output. Laser beam is transmitted several times through the amplifier, and the pointing stability is a critical factor affecting the efficiency of the system. Any perturbation of the optics during laser transmission can cause misalignment and further lead to beam pointing errors. Laser beam propagation simulation was conducted using the ray tracing method. Equivalent experiment was performed using a laser with a wavelength of 532nm, and the centroid position data of the laser beam were collected to characterize the effect of the optics misalignment on laser pointing. A model evaluating the sensitivity of the optics was constructed, and the analysis of how various optics impact pointing accuracy was conducted. Results indicate that, a linear relationship exists between the misalignment of the optic and the pointing shift and angular deviation of the beam when a single optic is misaligned. If multiple optics are misaligned, the shift in centroid position of the laser beam can be calculated by adding up the shifts caused by each misaligned optic. Furthermore, the shift in the centroid position of the laser beam is the linear superposition of the misalignment of each optic.

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Estimate of the effect of micro-vibration on the performance of the Algerian satellite (Alsat-1B) imager

Cited by 31 publications

References 5 publications

Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements

Simulating and Testing Microvibrations on an Optical Satellite Using Acceleration Sensor-Based Jitter Measurements

Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Analysis of misaligned optics effects on beam pointing stability in dual-pass optical system

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