Improved Path Planning and Attitude Control Method for Agile Maneuver Satellite with Double-Gimbal Control Moment Gyros

Cui, Peiling; He, Jingxian; Cui, Jian; Li, Haitao

doi:10.1155/2015/878724

Cited by 3 publications

(2 citation statements)

References 8 publications

(17 reference statements)

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“…To calculate the control torque T c ∈ 3×1 , the satellite's kinematics equation of motion is expressed in quaternion form:q = 1 2 q ω q (16) where denotes the quaternion multiplication and q = [q 0 , q 1 , q 2 , q 3 ] T ∈ 4×1 is the attitude quaternion. ω q is the angular velocity vector of the satellite, ω, given in a quaternion form as ω q = [0, ω T ] T ∈ 4×1 .…”

Section: Vscmg Equations Of Motionmentioning

confidence: 99%

“…A different path-planning technique that blends the pseudo-spectral and direct-shooting methods upon gimbal saturation and singularity constraints was presented in [15]. Energy-consumption-based path-planning techniques for double-gimbal CMGs have also been studied [16]. A global singularity-avoidance steering law was presented in [17], in which the time integral of the quadratic sum of the gimbal rates was minimised.…”

Section: Introductionmentioning

confidence: 99%

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A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control

2021

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This paper addresses the problem of singularity avoidance in a cluster of four Single-Gimbal Control Moment Gyroscopes (SGCMGs) in a pyramid configuration when used for the attitude control of a satellite by introducing a new gimballed control moment gyroscope (GCMG) cluster scheme. Four SGCMGs were used in a pyramid configuration, along with an additional small and simple stepper motor that was used to gimbal the full cluster around its vertical (z) axis. Contrary to the use of four variable-speed control moment gyroscopes (VSCMGs), where eight degrees of freedom are available for singularity avoidance, the proposed GCMG design uses only five degrees of freedom (DoFs), and a modified steering law was designed for the new setup. The proposed design offers the advantages of SGCMGs, such as a low weight, size, and reduced complexity, with the additional benefit of overcoming the internal elliptic singularities, which create a minor attitude error. A comparison with the four-VSCMG cluster was conducted through numerical simulations, and the results indicated that the GCMG design was considerably more efficient in terms of power while achieving a better gimbal configuration at the end of the simulation, which is essential when it is desired for different manoeuvres to be consecutively executed. Additionally, for a nano-satellite of a few kilograms, the results prove that it is feasible to manufacture the GCMG concept by using affordable and lightweight commercial off-the-shelf (COTS) stepper motors.

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Section: Vscmg Equations Of Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control

2021

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Attitude path design and adaptive robust tracking control of a remote sensing satellite in various imaging modes

Zarourati

Mirshams

Tayefi

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper addresses the attitude path design of a remote sensing satellite in various imaging modes. The novel path design algorithm is based on local polynomial regression, which produces a smooth attitude path by receiving the size and timing of maneuvers in each axis according to the desired imaging mode. This algorithm is described for stereo and snapshot modes in an imaging operation. The adaptive robust tracking control (ARTC) law is designed using quaternion algebra to perform the required maneuvers in an attitude path. The ARTC structure includes a sliding mode strategy, a projection-based adaptive model compensation, and a linear feedback term. Suitable conditions for imaging in each mode and the time of taking the image are determined by defining and evaluating the attitude control indices. These indices are defined by the half-cone error along the payload line of sight and relative performance error as a jitter with a 3-sigma confidence level. Despite the challenges in the path design, such as smoothness, system agility, and finite time realization of indices, in a conventional stereo imaging mode, taking an image in the nadir-pointing attitude is neglected. As a result, our work provides suitable conditions for taking the image in this attitude with an interval of 1.2 s. Finally, numerical simulations and verification are performed using multidisciplinary simulation, indicating the effectiveness of the proposed algorithm and model-based ARTC law.

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A Machine Learning Approach for Global Steering Control Moment Gyroscope Clusters

et al. 2022

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This paper addresses the problem of singularity avoidance for a 4-Control Moment Gyroscope (CMG) pyramid cluster, as used for the attitude control of a satellite using machine learning (ML) techniques. A data-set, generated using a heuristic algorithm, relates the initial gimbal configuration and the desired maneuver—inputs—to a number of null space motions the gimbals have to execute—output. Two ML techniques—Deep Neural Network (DNN) and Random Forest Classifier (RFC)—are utilized to predict the required null motion for trajectories that are not included in the training set. The principal advantage of this approach is the exploitation of global information gathered from the whole maneuver compared to conventional steering laws that consider only some local information, near the current gimbal configuration for optimization and are prone to local extrema. The data-set generation and the predictions of the ML systems can be made offline, so no further calculations are needed on board, providing the possibility to inspect the way the system responds to any commanded maneuver before its execution. The RFC technique demonstrates enhanced accuracy for the test data compared to the DNN, validating that it is possible to correctly predict the null motion even for maneuvers that are not included in the training data.

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Improved Path Planning and Attitude Control Method for Agile Maneuver Satellite with Double-Gimbal Control Moment Gyros

Cited by 3 publications

References 8 publications

A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control

A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control

Attitude path design and adaptive robust tracking control of a remote sensing satellite in various imaging modes

A Machine Learning Approach for Global Steering Control Moment Gyroscope Clusters

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