Torsional vibration induced by gyroscopic effect in the modified couple stress based micro-rotors

Jahangiri, M.; Asghari, Mohsen; Bagheri, Emadoddin

doi:10.1016/j.euromechsol.2019.103907

Cited by 10 publications

(2 citation statements)

References 48 publications

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“…Precession and nutation of the gyroscope will occur under the action of an external moment. The gyroscopic effect is found in various fields, such as mechanical engineering [19][20][21], hydropower engineering [22,23], aerospace engineering [24,25], wind energy engineering [26,27], vehicle engineering [28], astronomy [29], and so on.…”

Section: Introductionmentioning

confidence: 99%

The Trajectory Prediction of Spacecraft under the Influence of Gyroscopic Effect Generated during Non-Keplerian Motion

Li,

Zhang,

2024

Electronics

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Due to perturbation forces and control forces, trajectories of spacecraft around the Earth are usually non-Keplerian orbits, which may result in a gyroscopic effect. To meet the complex demands of space operations in the future, the trajectory prediction of spacecraft under the influence of the gyroscopic effect generated during non-Keplerian motion needs to be studied in depth. The paper investigated the trajectory of spacecraft under the gyroscopic effect generated during non-Keplerian motion. Firstly, according to the similarity between the spacecraft precession motion and the gyroscopic precession, as well as the definition of the “gyroscopic effect” of high-speed rotating bodies, the “gyroscopic effect” generated during the non-Keplerian motion of spacecraft around the earth was defined. Then, taking a continuous radial thrust orbit as an example, the dynamics equations of spacecraft under the influence of gyroscopic effect were deduced. Through theoretical analysis and numerical simulation, the trajectory of spacecraft under the influence of the gyroscopic effect generated during non-Keplerian motion was investigated. Finally, the paper simulated the examples and tested the performance of the proposed method. Simulation results show that a large gyroscopic moment may be generated in some non-Keplerian motion of the spacecraft. The greater the rotational angular velocity of the orbital plane, the greater the gyroscopic moment. Due to the gyroscopic effect, there is a significant deviation in the orbit and the orbital elements compared to those without considering the gyroscopic effect, which indicates that the influence of the gyroscopic effect generated during non-Keplerian motion on the orbit of the spacecraft cannot be ignored. It can be seen from the simulation results that the gyroscopic effect has a significant influence on the trajectory of spacecraft. In some special cases, the gyroscopic effect can be utilized reasonably to save fuel and realize low-energy orbit maneuver control technology in actual space missions; but the control should be considered for the spacecraft to bring it back to the desired orbit in most cases. It is necessary to study the trajectory of spacecraft under the influence of gyroscopic effect. The method and conclusions proposed can provide a theoretical reference for spacecraft trajectory prediction and future large-scale fast orbital maneuvers to meet the needs of complex space operations.

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Section: Introductionmentioning

confidence: 99%

The Trajectory Prediction of Spacecraft under the Influence of Gyroscopic Effect Generated during Non-Keplerian Motion

Li,

Zhang,

2024

Electronics

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“…As micro-electromechanical systems (MEMS) develop rapidly, microcylindrical Couette flows have been often encountered in a variety of MEMS devices [1][2][3][4][5]. Although microcylindrical Couette flows in the concentric cylindrical geometry have been widely studied by lots of scholars using analytical and numerical methods [6][7][8][9][10][11][12][13][14][15][16], the study of microcylindrical Couette flows is also a hot topic of MEMS modeling.…”

Section: Introductionmentioning

confidence: 99%

A modified lattice Boltzmann model for microcylindrical Couette gas flows

Ren¹,

Wang²,

Liu³

2022

Phys. Scr.

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We develop an axisymmetric lattice Boltzmann (LB) model to simulate microcylindrical Couette gas flows (MCGF) in the slip regime and transition regime, respectively. A kinetic boundary scheme in the cylindrical coordinate system is proposed to fulfill the second-order slip boundary condition at the cylindrical wall. To consider the effect of the Knudsen layers for transition flows, local effective Knudsen numbers are introduced into the kinetic boundary scheme and relaxation time. Numerical tests are executed to acquire the velocity distributions of the time-independent and time-dependent MCGF. Comparisons with the analytical solution and direct Monte Carlo data are also implemented. The simulation results demonstrate that the developed LB model can successfully acquire the velocity distribution of the MCGF with an intermediate Knudsen number in the transition regime.

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Small-scale oriented elasticity modeling of functionally graded rotating micro-disks with varying angular velocity in the context of the strain gradient theory

et al. 2021

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Torsional vibration induced by gyroscopic effect in the modified couple stress based micro-rotors

Cited by 10 publications

References 48 publications

The Trajectory Prediction of Spacecraft under the Influence of Gyroscopic Effect Generated during Non-Keplerian Motion

The Trajectory Prediction of Spacecraft under the Influence of Gyroscopic Effect Generated during Non-Keplerian Motion

A modified lattice Boltzmann model for microcylindrical Couette gas flows

Small-scale oriented elasticity modeling of functionally graded rotating micro-disks with varying angular velocity in the context of the strain gradient theory

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