Solar Dynamics Observatory On-orbit Jitter Testing, Analysis, and Mitigation Plans

Liu, Kuo-Chia; Blaurock, Carl; Bourkland, Kristin L.; Morgenstern, Wendy M.; Maghami, Peiman G.

doi:10.2514/6.2011-6730

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…Because the entire machine is tested, two methods can be used to simulate the micro-vibration environment: the first is to use real disturbance equipment such as a flight reaction wheel, and the second is to use a simulator. Liu et al (2007) used a flight reaction wheel to generate the required disturbance and connected it to a structural verification unit to measure the degree of disturbance produced by the flight reaction wheel. However, disturbance generation using the flight reaction wheel increases the experimental costs greatly and requires a high level of research funding.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al (2007) used a flight reaction wheel to generate the required disturbance and connected it to a structural verification unit to measure the degree of disturbance produced by the flight reaction wheel. However, disturbance generation using the flight reaction wheel increases the experimental costs greatly and requires a high level of research funding.…”

Section: Introductionmentioning

confidence: 99%

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A novel six-dimensional disturbance force and moment simulator for simulation of space micro-vibration environment

Wang

et al. 2022

Journal of Vibration and Control

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A novel six-dimensional disturbance force and moment simulator was developed because of the lack of a suitable vibration source for use in ground experiments. First, the dynamic relationship between the disturbance force, the disturbance moment generated at the center of the simulator platform, and the excitation forces of the six uniaxial actuators was established using the equivalent principle of force system. Then, the simulator structure was introduced and a modal analysis of this structure was performed. Finally, the simulator system was tested experimentally in both single-frequency experiments and multi-frequency experiments. The results obtained showed that the maximum error between the experimental values and the target values was 2.96%, which verified the correctness of the theoretical model of the six-dimensional disturbance force and moment simulator. Additionally, the multi-dimensional micro-vibration generation performance of the new simulator was verified. The proposed six-dimensional disturbance force and moment simulator can provide a micro-vibration environment to replace the real disturbance sources used in ground experiments and solve the problems caused by the lack of a vibration source for use in ground-based experiments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel six-dimensional disturbance force and moment simulator for simulation of space micro-vibration environment

Wang

et al. 2022

Journal of Vibration and Control

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“…However, the MHD ARS does not possess the capability of measurement at low frequency (<1 Hz), especially the constant inertial angular rate [ 12 ], which is essential for precision LOS pointing and wide-bandwidth LOS jitter suppression [ 13 , 14 ]. Martin et al [ 15 ] investigated whether the differential of MHD ARS could be used to measure head angular acceleration in impact testing.…”

Section: Introductionmentioning

confidence: 99%

Error Analysis of Magnetohydrodynamic Angular Rate Sensor Combing with Coriolis Effect at Low Frequency

et al. 2018

Sensors

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The magnetohydrodynamic (MHD) angular rate sensor (ARS) with low noise level in ultra-wide bandwidth is developed in lasing and imaging applications, especially the line-of-sight (LOS) system. A modified MHD ARS combined with the Coriolis effect was studied in this paper to expand the sensor’s bandwidth at low frequency (<1 Hz), which is essential for precision LOS pointing and wide-bandwidth LOS jitter suppression. The model and the simulation method were constructed and a comprehensive solving method based on the magnetic and electric interaction methods was proposed. The numerical results on the Coriolis effect and the frequency response of the modified MHD ARS were detailed. In addition, according to the experimental results of the designed sensor consistent with the simulation results, an error analysis of model errors was discussed. Our study provides an error analysis method of MHD ARS combined with the Coriolis effect and offers a framework for future studies to minimize the error.

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“…While for MEMS gyroscopes the reliability and shock resistance issues [ 9 ] are still open and micro integrated optic gyros have serious critical aspect in reducing the influence of noise sources especially in a wide bandwidth [ 10 ], in fact, there are some applications where very small angles in vibration environments need to be measured and controlled precisely. On-orbit jitter measurement in line-of-sight (LOS) stabilization system [ 11 ], space borne Earth observation [ 12 ] and Solar Dynamic Observatory [ 13 ] are examples of such environments where ultralow measurement noise (<1 μrad/s(rms)) [ 14 ] with wide bandwidth [ 15 ] is demanded. The magnetohydrodynamic (MHD) angular rate sensor (ARS) has no mechanical saturation allowing rapid recovery from large angle slews and low measurement noise levels without additional increased complexity in ultra-wideband.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study of Radial Velocity Generation for Extending Bandwidth of Magnetohydrodynamic Angular Rate Sensor at Low Frequency

et al. 2015

Sensors

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The magnetohydrodynamics angular rate sensor (MHD ARS) has received much attention for its ultra-low noise in ultra-broad bandwidth and its impact resistance in harsh environments; however, its poor performance at low frequency hinders its work in long time duration. The paper presents a modified MHD ARS combining Coriolis with MHD effect to extend the measurement scope throughout the whole bandwidth, in which an appropriate radial flow velocity should be provided to satisfy simplified model of the modified MHD ARS. A method that can generate radial velocity by an MHD pump in MHD ARS is proposed. A device is designed to study the radial flow velocity generated by the MHD pump. The influence of structure and physical parameters are studied by numerical simulation and experiment of the device. The analytic expression of the velocity generated by the energized current drawn from simulation and experiment are consistent, which demonstrates the effectiveness of the method generating radial velocity. The study can be applied to generate and control radial velocity in modified MHD ARS, which is essential for the two effects combination throughout the whole bandwidth.

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Solar Dynamics Observatory On-orbit Jitter Testing, Analysis, and Mitigation Plans

Cited by 9 publications

References 3 publications

A novel six-dimensional disturbance force and moment simulator for simulation of space micro-vibration environment

A novel six-dimensional disturbance force and moment simulator for simulation of space micro-vibration environment

Error Analysis of Magnetohydrodynamic Angular Rate Sensor Combing with Coriolis Effect at Low Frequency

Theoretical and Experimental Study of Radial Velocity Generation for Extending Bandwidth of Magnetohydrodynamic Angular Rate Sensor at Low Frequency

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