The influence of flywheel micro vibration on space camera and vibration suppression

Li, Lin; Tan, Liansheng; Kong, Lin; Wang, Dong; Hu, Yang

doi:10.1016/j.ymssp.2017.07.029

Cited by 101 publications

(46 citation statements)

References 11 publications

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“…Negative effects of vibration on people, machine, and devices are well known. (1,2) The best solution is to eliminate the vibration of the vibration source. However, this is almost impossible to achieve.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Gui¹,

Xia²,

Hao³

et al. 2019

Sensors and Materials

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Polymeric materials are used for vibration protection owing to their high-energy dissipation or adsorption. In this study, polyurethane elastomers (PUEs) were prepared using six kinds of chain extender and three types of cross-linking agent. The relationships between their structures and vibration isolation performances were investigated in detail using an independent building vibration isolation sensor. The results showed that elastomers with fewer main chain carbon atoms exhibited better vibration isolation performance. With increasing number of side groups of the chain extender, both the damping and vibration isolation properties were improved. For different cross-linkers, a more irregular structure of the cross-linkers resulted in the better vibration isolation performance of the PUEs.

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Section: Introductionmentioning

confidence: 99%

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Gui¹,

Xia²,

Hao³

et al. 2019

Sensors and Materials

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show abstract

“…Up to now, two kinds of test methods for optical satellites have been mainly adopted. One is an optical imaging test, which simulates the condition of the camera in orbit to show the influence of microvibrations [14,15]. The result is not only intuitive but also consistent with the camera’s in orbit performance.…”

Section: Introductionmentioning

confidence: 76%

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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“…These vibrations result from different sources such as noise, wind, and mechanical vibrations, which are formed nearby bridges and trains, as regular movements around a certain place for several times. It is known as frequency in Hz unit [13]. Evaluating and measuring the vibration has a lot of variations and possible technologies.…”

Section: Vibrationmentioning

confidence: 99%

“…The effect of Sun, and battery capacity have been measured and estimated by Ashraf A.A. Beshr, and Islam M. Abo Elnaga [2]. The authors concluded that the leveling process has been enhanced by (10)(11)(12)(13)(14)(15) %. Moreover, Reda el al [3] studied the effects of angle incidence and targets with different colors on distance measurement about the total station refrectorless, and The accuracy of reflectorless distance measurement is also investigated, In addition to that, comparison was made for manual and automatic target recognition measurement.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Vibration on the Accuracy of Digital Surveying Instruments

Fawzy

2019

Civ Eng J

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A digital surveying instrument has a crucial and effective role in civil engineering. These digital surveying instruments have contributed to providing quick and simplified solutions to solve many surveying problems: particularly accuracy, saving time, and effort .Therefore, the main objective of this research is the study of the vibrations effect on digital devices efficiency during the observation process, which occur frequently especially when the devices occupy the bridges during observation or when the occupation of the device is set nearby the railways, as well as in construction sites with heavy equipment movement. Although most digital surveying instruments contain a compensator device, this research find out through the experimental test that the effect of vibration on the accuracy of observation results and the noticed errors may extend to many centimeters. In case of using the digital level devices (SOKKIA SDL-30) under exposure to vibration (up to 20 KHZ/Sec), the average error of elevation was 36.9 mm in 80 m distance and the maximum standard deviation elevation error was 18.26 mm. But in the case of using the reflector-less total station (SOKKIA SET330RK) under exposure to vibration (from 7.5 to 15 KHZ/Sec), the average error of positioning was 79.95 mm in 85 m distance and the maximum standard deviation positioning error was 43.41 mm.

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The influence of flywheel micro vibration on space camera and vibration suppression

Cited by 101 publications

References 11 publications

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

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

The Impact of Vibration on the Accuracy of Digital Surveying Instruments

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