Design of micro-vibration isolation system for a remote-sensing satellite payload using viscoelastic materials

Safarabadi, M.; Haghshenas, Javad; Kelardeh, H.

doi:10.5267/j.esm.2019.8.003

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…The techniques of micro-vibration isolation system can be classified into three main categories, passive, active, semi-active isolation [51]. A mechanical low-pass filter with a classic control mechanism is used in passive isolation system.…”

Section: Vibration Isolatormentioning

confidence: 99%

New modeling approach of laser communication in constellation and through atmospheric disturbances

2021

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Laser communication between satellites in the constellation and from the satellites to ground stations offers a gigantic data rate for the users. This principal advantage drives telecom companies to develop this technology to use it like a carrier signal, the most disadvantage of this technology is the need to very complicated pointing systems between the transmitter and the receiver due to a very small beam divergence, continually moving of satellites in orbits and the distance between the satellites (tens of thousands of kilometers). The laser beam suffers continuously from several factors like atmospheric turbulences, internal and external vibrations. All these factors lead to an increase in the bit errors rate and cause degradation in the communication quality. This paper deals with a new method of modelisation of external effects in transmission of signal light from a ground station to the satellite through atmospheric disturbances. Indeed, an in-depth investigation, of the influences of satellite vibrationsinlaser signal transmission between satellites constellation, has been conducted by studying the effect of the intensity of vibrations on the optical signal amplitude. Some solutions are proposed to improve the efficiency of optical satellites communications.

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Section: Vibration Isolatormentioning

confidence: 99%

New modeling approach of laser communication in constellation and through atmospheric disturbances

2021

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“…Some disturbances include interactions between the harmonics and the structural modes of the wheel which result in large disturbance amplifications at some wheel speeds [7]. These vibrations constitute the primary source of interference that significantly impacts the design performance of payloads [8][9][10][11]. In particular, for optical payloads, the impact of flywheel disturbance cannot be ignored and is difficult to eliminate.…”

Section: Introductionmentioning

confidence: 99%

Flywheel Vibration Isolation of Satellite Structure by Applying Structural Plates with Elastic Boundary Instead of Restrained Boundary

Kong,

Li,

Zhou

et al. 2023

Applied Sciences

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Flywheels play a critical role as core components in satellite attitude control systems. However, their high-speed rotation inevitably generates vibrations that have a detrimental impact on the in-orbit imaging capabilities of high-precision remote sensing payloads. This study focuses on the passive vibration isolation design of satellite flywheels. The flywheel-mounted structural plate and flywheel vibration isolation platform are considered as a whole system (termed a plate-isolator system). In this system, the structural plate is treated as an elastomer. By simplifying the plate-isolator system as a 2-degree-of-freedom vibration system, it becomes evident that obtaining an ideal vibration isolation effect through the optimization of the flywheel vibration isolation platform (FVIP) alone is difficult. In order to enhance the passive vibration isolation effect for satellite flywheels, this study introduces the concept of an elastic boundary applied to the flywheel-mounted structural plate, thus treating the elastic boundary as a design factor. Consequently, the plate-isolator system can be simplified as a 3-stage vibration isolation system. The optimization of the elastic boundary condition of the structural plate is performed using the kinetic model of the simplified 3-stage system. The vibration isolation effect of the plate-isolator system with an elastic boundary is further confirmed through finite element simulation. The calculation results demonstrate that, after establishing a reasonable elastic boundary for the satellite structural plate, the overall vibration/force transmission rate of the plate-isolator system becomes similar to that of a single-degree-of-freedom dynamic system. Finally, the proposed concept is validated through kinetic response analysis of a cube satellite. The results reveal that the vibration amplitude of the satellite’s top and side structural plates can be effectively lowered if the elastic boundary condition is set for the flywheel-mounted bottom structural plate.

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Vibration isolation methods in spacecraft: A review of current techniques

Shi,

Abubakar,

Bai

et al. 2024

Advances in Space Research

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Design of micro-vibration isolation system for a remote-sensing satellite payload using viscoelastic materials

Cited by 8 publications

References 19 publications

New modeling approach of laser communication in constellation and through atmospheric disturbances

New modeling approach of laser communication in constellation and through atmospheric disturbances

Flywheel Vibration Isolation of Satellite Structure by Applying Structural Plates with Elastic Boundary Instead of Restrained Boundary

Vibration isolation methods in spacecraft: A review of current techniques

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