A new vibration mechanism of balancing machine for satellite-borne spinning rotors

Wang, Qiuxiao; Wang, Fei

doi:10.1016/j.cja.2014.08.001

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…For this reason, the effects of the unbalances might have to be corrected at commissioning by means of a dedicated * https://www.esa.int/ESA_Multimedia/Images/2020/11/CIMR. balancing system [7].…”

Section: Introductionmentioning

confidence: 99%

Design of an Active Balancing System for Rotating Orbital Devices

Meraglia¹,

Invernizzi²,

Lovera³

et al. 2023

Journal of Guidance, Control, and Dynamics

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This paper presents the design of an active balancing system for rotating orbital devices, motivated by recent space applications for spacecraft endowed with rotating payloads. The main motivation behind this work is the Copernicus Imaging Microwave Radiometry mission, which will feature a large rotating microwave radiometer to provide observations of sea-surface temperature, sea-ice concentration, and sea-surface salinity. Due to the presence of highly uncertain inertial asymmetries in the rotating device, potentially large internal forces and torques can appear at interface between the spacecraft and the rotor, which can cause a significant degradation of the system performance and can even affect its stability. To counteract such unbalance effects, an active balancing system made of a suitable set of actuated movable masses and sensors is developed in this work. Exploiting the time-periodic nature of the underlying dynamics, a harmonic controller has been designed to command the positions of the actuated masses in such a way that the effects of rotor unbalance are significantly reduced. After extensive numerical simulations, accounting for both parametric uncertainties and exogenous disturbances in the model, a dedicated breadboard has been developed and experimental validation of the control law has been carried out.

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Section: Introductionmentioning

confidence: 99%

Design of an Active Balancing System for Rotating Orbital Devices

Meraglia¹,

Invernizzi²,

Lovera³

et al. 2023

Journal of Guidance, Control, and Dynamics

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show abstract

“…Otros desarrollos para balancear apuntan al empleo de instrumentos virtuales, soportes del proceso, basados en el método de coeficientes de influencia [1], e incluso técnicas para balanceo de rotores acoplados directamente a un motor de inducción utilizando la corriente residual [15], o empleando el método modal [16]. También existe el balanceo en equipos de alta precisión, sistemas en los que la más mínima fuerza centrífuga afecta de forma importante su condición de operación, como es el caso de los satélites [17] y las herramientas de corte [18] [19].…”

Section: Introductionunclassified

Metodología para el balanceo de rotores empleando un analizador de vibraciones

Acevedo¹,

A²,

A.³

2018

revuin

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“…For a free rotor, the dynamic imbalance can be measured by using well-developed methods and then reduced with correction devices by adding or subtracting correction masses [ 21 , 22 ]. Owing to the limits of practical devices, a certain residual imbalance still exists in the rotor after dynamic balancing [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Indirect Measurement of Rotor Dynamic Imbalance for Control Moment Gyroscopes via Gimbal Disturbance Observer

Huang

Wang

2018

Sensors

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The high-precision speed control of gimbal servo systems is the key to generating high-precision torque for control moment gyroscopes (CMGs) in spacecrafts. However, the control performance of gimbal servo systems may be degraded significantly by disturbances, especially a dynamic imbalance disturbance with the same frequency as the high-speed rotor. For assembled CMGs, it is very difficult to measure the rotor imbalance directly by using a dynamic balancing machine. In this paper, a gimbal disturbance observer is proposed to estimate the dynamic imbalance of the rotor assembled in the CMG. First, a third-order dynamical system is established to describe the disturbance dynamics of the gimbal servo system, in which the rotor dynamic imbalance torque along the gimbal axis and the other disturbances are modeled to be periodic and bounded, respectively. Then, the gimbal disturbance observer is designed for the third-order dynamical system by using the total disturbance as a virtual measurement. Since the virtual measurement is derived from the inverse dynamics of the gimbal servo system, the information of the rotor dynamic imbalance can be obtained indirectly only using the measurements of gimbal speed and three-phase currents. Semi-physical experimental results demonstrate the effectiveness of the observer by using a CMG simulator.

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A new vibration mechanism of balancing machine for satellite-borne spinning rotors

Cited by 6 publications

References 22 publications

Design of an Active Balancing System for Rotating Orbital Devices

Design of an Active Balancing System for Rotating Orbital Devices

Metodología para el balanceo de rotores empleando un analizador de vibraciones

Indirect Measurement of Rotor Dynamic Imbalance for Control Moment Gyroscopes via Gimbal Disturbance Observer

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