Modelling and testing of a soft suspension design for a reaction/momentum wheel assembly

Zhou, Weiyong; Aglietti, Guglielmo S.; Zhang, Zhe

doi:10.1016/j.jsv.2011.03.028

Cited by 56 publications

(40 citation statements)

References 16 publications

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“…The working conditions with the rubber shock absorber and without the rubber shock absorber were investigated. To intimate the real flying condition of satellite and the gravity environment in space, the satellite is suspended with a soft sling [29,30].…”

Section: Experimental Systemmentioning

confidence: 99%

Effects of rubber shock absorber on the flywheel micro vibration in the satellite imaging system

Changcheng

Jia

et al. 2016

Photonic Sens

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When a satellite is in orbit, its flywheel will generate micro vibration and affect the imaging quality of the camera. In order to reduce this effect, a rubber shock absorber is used, and a numerical model and an experimental setup are developed to investigate its effect on the micro vibration in the study. An integrated model is developed for the system, and a ray tracing method is used in the modeling. The spot coordinates and displacements of the image plane are obtained, and the modulate transfer function (MTF) of the system is calculated. A satellite including a rubber shock absorber is designed, and the experiments are carried out. Both simulation and experiments results show that the MTF increases almost 10 %, suggesting the rubber shock absorber is useful to decrease the flywheel vibration.

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Section: Experimental Systemmentioning

confidence: 99%

Effects of rubber shock absorber on the flywheel micro vibration in the satellite imaging system

Changcheng

Jia

et al. 2016

Photonic Sens

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“…However, the extra vibration isolation systems will add unfavourable mass and structure to the spacecraft. An alternative design for RWA/MWA is to replace the "rigid" support by a "soft" suspension support in the wheel assemblies, which operates as a vibration isolator and filters the higher-frequency disturbances [16]. The soft suspension supports are widely used in high rotational speed rotor systems, such as squirrel cage rotor, domestic washing machine, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…The soft suspension supports are widely used in high rotational speed rotor systems, such as squirrel cage rotor, domestic washing machine, and so on. However, there are few publications investigate the soft suspension support in the MWA, except Zhou et al [16], who have built up the mathematical model of soft suspension support cantilevered momentum wheel assemblies (CMWA) and tested corresponding microvibrations. However, Zhou et al [16] have built up the equations of motion by making a linear assumption, ignoring the stiffness of the ball bearing and its nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are few publications investigate the soft suspension support in the MWA, except Zhou et al [16], who have built up the mathematical model of soft suspension support cantilevered momentum wheel assemblies (CMWA) and tested corresponding microvibrations. However, Zhou et al [16] have built up the equations of motion by making a linear assumption, ignoring the stiffness of the ball bearing and its nonlinearity. In this paper, we investigated the stiffness of the angular contact ball bearing and its nonlinearity, and then analyzed the performance of the CMWA with a soft suspension support in series.…”

Section: Introductionmentioning

confidence: 99%

“…Section 4 gives the conclusions. The data in [16] is employed to analyse the characteristics of rigid and soft suspension CMWA. Table 1 gives the parameters of the CMWA used in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improving Performance of Cantilevered Momentum Wheel Assemblies by Soft Suspension Support

Zhou

2013

Shock and Vibration

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Abstract. This paper focuses on improving the performance of the rigid support cantilevered momentum wheel assemblies (CMWA) by soft suspension support. A CMWA, supported by two angular contact ball bearings, was modeled as a Jeffcott rotor. The support stiffness, before and after in series with a linear soft suspension support, were simplified as two Duffing's type springs respectively. The result shows that the rigid support CMWA produces large disturbance force at the resonance speed range. The soft suspension CMWA can effectively reduce the force on the bearing (also disturbance forces produced by the CMWA) at high rotational speed, and also reduce the nonlinear characteristic of the stiffness. However, the instability of the soft suspension CMWA will limit the maximum rotational speed of the CMWA. Thus, a "proper" stiffness of the soft suspension system is a trade-off strategy between reduction of the force and extension of the speed range simultaneously.Keywords: Cantilevered momentum wheel assemblies, ball bearing, soft suspension support, in series, instability, imbalance Radius obtained by liner model r:Displacement of the axis centre r 0

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Robust microvibration mitigation and pointing performance analysis for high stability spacecraft

Preda

Cieslak

Henry

et al. 2018

Intl J Robust & Nonlinear

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Summary This paper deals with the development of a mixed active‐passive microvibration mitigation solution capable of attenuating the transmitted vibrations generated by reaction wheels to a satellite structure. A dedicated simulation environment, provided by the European Space Agency and Airbus Defence and Space industries, serves as a support for testing the proposed solution at satellite level. This paper covers modeling, control system design, and worst‐case analysis for a typical satellite observation mission that requires high pointing stability. Combined with a novel disturbance model for the reaction wheel perturbations, the pointing performance and stability requirements are reformulated as bounds on the worst‐case L2 system gains. Subsequently, the active microvibration controller is tuned to manage the conflicting design goals and optimize different trade‐offs between robustness and performance. Finally, robust stability margins and worst‐case performance bounds with respect to various system uncertainties, time‐varying reaction wheel spin rates, actuator saturation, and time delays are obtained using the structured singular value, integral quadratic constraints, and time‐domain nonlinear simulations.

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Modelling and testing of a soft suspension design for a reaction/momentum wheel assembly

Cited by 56 publications

References 16 publications

Effects of rubber shock absorber on the flywheel micro vibration in the satellite imaging system

Effects of rubber shock absorber on the flywheel micro vibration in the satellite imaging system

Improving Performance of Cantilevered Momentum Wheel Assemblies by Soft Suspension Support

Robust microvibration mitigation and pointing performance analysis for high stability spacecraft

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