Steering law design for a magnetically suspended control and sensitive gyro cluster considering rotor tilt saturation

Xia, Changliang; Cai, Yuanwen; Ren, Yuan

doi:10.1177/0954410018816593

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Wang [12] proposed a new strategy for solving the singularity problem, which reveals the structural properties in terms of the upper and lower bounds of the flywheel governing speed. Xia [13] proposed an adaptive nonlinear pseudoinverse reversal law to effectively suppress the effect of rotor tilt saturation on the sensitive gyro cluster [14]. Zhang [15] designed an anti-saturation steering law based on the pseudoinverse; he added a weight parameter to the steering law to avoid the angle saturation.…”

Section: Introductionmentioning

confidence: 99%

Spacecraft Attitude Measurement and Control Using VSMSCSG and Fractional-Order Zeroing Neural Network Adaptive Steering Law

Li,

Ren,

Wang

et al. 2024

Sensors

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In order to improve the accuracy and convergence speed of the steering law under the conditions of high dynamics, high bandwidth, and a small deflection angle, and in an effort to improve attitude measurement and control accuracy of the spacecraft, a spacecraft attitude measurement and control method based on variable speed magnetically suspended control sensitive gyroscopes (VSMSCSGs) and the fractional-order zeroing neural network (FO-ZNN) steering law is proposed. First, a VSMSCSG configuration is designed to realize attitude measurement and control integration in which the VSMSCSGs are employed as both actuators and attitude-rate sensors. Second, a novel adaptive steering law using FO-ZNN is designed. The matrix pseudoinverses are replaced by FO-ZNN outputs, which solves the problem of accuracy degradation in the traditional pseudoinverse steering laws due to the complexity of matrix pseudoinverse operations under high dynamics conditions. In addition, the convergence and robustness of the FO-ZNN are proven. The results show that the proposed FO-ZNN converges faster than the traditional zeroing neural network under external disturbances. Finally, a new weighting function containing rotor deflection angles is added to the steering law to ensure that the saturation of the rotor deflection angles can be avoided. Semi-physical simulation results demonstrate the correctness and superiority of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Spacecraft Attitude Measurement and Control Using VSMSCSG and Fractional-Order Zeroing Neural Network Adaptive Steering Law

Li,

Ren,

Wang

et al. 2024

Sensors

Self Cite

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show abstract

“…19 Some researchers presented pseudo inversebased steering law with weight adjustment for the orthogonal cluster of the MSW. [20][21][22] The weight adjustment strategy aims to propose non-saturate tilt angles compared with conventional and null motion steering laws. However, in the agile maneuver of the satellite, the tilt angles saturate soon due to MSW's small tilt angle.…”

Section: Introductionmentioning

confidence: 99%

Disturbance observer backstepping sliding mode agile attitude control of satellite based on the anti-saturation hybrid actuator of the magnetorquer and magnetically suspended wheel

Tayebi

Chen

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper presents a new anti-saturation strategy to avoid external singularity, improve reliability, and fast maneuvers of a satellite by combining the novel three-dimensional magnetically suspended wheel (3-D MSW) actuator and magnetorquer. The MSW is the preferred actuator for agile maneuvering compared to the traditional control moment gyro due to frictionlessness, low vibration, and long lifetime. The anti-saturation strategy includes 3-D MSW arrangement with pyramid configuration and three orthogonal magnetorquers. A steering law is designed to distribute control torque between actuators by calculating command tilt angles of the 3-D MSW and magnetic dipoles of the magnetorquer. A nonlinear disturbance observer backstepping sliding mode controller is designed to control the rotor shaft of 3-D MSW for agile maneuvers and desaturate it with the magnetorquer despite high-frequency disturbances. Finally, simulation results of attitude control based on anti-saturation hybrid actuators demonstrate the effectiveness and accuracy of agile maneuvers. Compared with usual steering laws, simulation outcomes confirm the proposed method and desaturate the 3-D MSW system when it experiences a maximum workspace and does not have extra angular momentum.

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“…A robust ACS has been developed for spacecraft with MSW, and a simulated annealing technique was used to optimize the robust PID controller (Peng, 2012). The steering law structure for determining the tilt angle of MSW clusters (Xia, 2018) is approximately the same for CMG-based mechanism actuators. A torque distribution strategy based on the united magnetically suspended inertia actuator was proposed (Yu, 2016).…”

Section: Introductionmentioning

confidence: 99%

High accuracy disturbance observer-based agile attitude stabilization with three-dimensional MSW

Tayebi

Chen

2021

AEAT

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Purpose The purpose of this paper is agile attitude control design with the novel three-dimensional (3D) magnetically suspended wheel (MSW) that is the preferred type for agile maneuvering compared to conventional control moment gyro due to frictionless, low vibration and long lifetime. This system does not require a separate steering law for pyramid arrangement to derive tilt angles. It is also conducting an agile maneuver with high accuracy despite the high-frequency disturbances. Design/methodology/approach In this paper, a disturbance observer-based attitude stabilization method is proposed for an agile satellite with a pyramid cluster of the novel 3D magnetically suspended wheel actuator. This strategy includes a disturbance observer and a linear quadratic regulator controller. The rotor shaft deflection of MSW is actively controlled to reduce vibration and producing gyro torque. The deflection angle of the pyramid cluster MSWs considered as control parameters. The closed-loop stability is proved by using the Lyapunov strategy. The efficiency and performance of the offered method verified by numerical simulation via MATLAB/SIMULINK software. Findings According to simulation results, the disturbance observer-based control controller stabilized the system with high accuracy and optimal tilt angles without any extra steering law equation. Hence, the system speed is increased, and the system error is minimized without separate steering law. Practical implications The magnetically suspended wheel is a new kind of inertia actuator for attitude control that has several benefits such as frictionless, high-speed rotor, clean environment and low vibration compared to the traditional wheel. It has complex nonlinear dynamics that cause have complicated controller design. The proposed strategy stabilizes the system and conducting an agile maneuver with high precision despite the high-frequency disturbances. It is applicable for some missions requiring high accuracies, like Earth observation and the solar observation mission that require a very accurate pointing control and a long lifetime. Originality/value This paper is the initial paper to design a pyramid array for magnetically suspended wheels. Compared to other research, this method doesn’t need a separate steering law of the MSWs cluster and presented optimal tilt angles with less computational. Also, it designs a disturbance observer-based controller for this system that proposed high accuracy and agile stabilization.

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Steering law design for a magnetically suspended control and sensitive gyro cluster considering rotor tilt saturation

Cited by 3 publications

References 18 publications

Spacecraft Attitude Measurement and Control Using VSMSCSG and Fractional-Order Zeroing Neural Network Adaptive Steering Law

Spacecraft Attitude Measurement and Control Using VSMSCSG and Fractional-Order Zeroing Neural Network Adaptive Steering Law

Disturbance observer backstepping sliding mode agile attitude control of satellite based on the anti-saturation hybrid actuator of the magnetorquer and magnetically suspended wheel

High accuracy disturbance observer-based agile attitude stabilization with three-dimensional MSW

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