Shape Optimization of the Momentum Ring Cross Section for Satellite Attitude Control Based on Magnetohydrodynamics

Abstract

Compared with the traditional actuator, the fluid momentum controller actuator based on magnetohydrodynamics (MHD) has some unique advantages and characteristics. In this paper, a method is proposed for the shape optimization of fluid momentum ring cross section. Based on the engineering situation, this article proposes a mathematical model of angular momentum that can be used for analytical calculations. Second, the two shapes obtained are unified and mathematically expressed in terms of maximum power and minimum resistance, respectively. Finally, the particle swarm algorithm is used to optimize the parameters of the proposed shape in combination with finite element method (FEM). Compared with the common rectangular section scheme, the attitude adjustment performance of fluid momentum ring can be effectively improved. Specifically, for the same area of cross section, the fluid momentum rings with the proposed shape provide the angular momentum values that exceed those of the rectangular shape by 14%-17% for the cases considered. This method avoids the huge computation of computational fluid dynamics and multidisciplinary topology optimization.

Optimized Ferromagnetic Core Magnetorquer Design and Testing for LEO Nanosatellite Attitude Control

“…Attitude control, stabilization and detumbling are some problems related to the position of any spacecraft in space around Earth [1]- [3]. For space applications, mechanical components with active moving parts can be used for attitude and vibration control [4]- [11].…”

Numerical simulation of the magnetic field in a magnetohydrodynamics momentum ring

“…A spherical magnetohydrodynamic attitude controller was studied by Zhou [10], and liquid flow charateristic, angular momentum, output torque were analyzed about this proposed mechanism. The new method about shape optimization applied to the magnetohydrodynamic liquid ring is proposed by Gu [11]. The authors display the studied method effectively decreases the computational cost of liquid dynamics, and it also improves optimization about multidisciplinary topology.…”

Numerical simulation study of fluid field based on a magnetohydrodynamics momentum ring

“…Zhou [7] researched a spherical magnetohydrodynamic attitude controller for three-axis attitude adjustment, the relationship among time and flow velocity and angular momentum was studied, the results can be used for the optimization of the proposed magnetohydrodynamic mechanism. Gu [8,9] has studied a new shape optimization method for the design of magnetohydrodynamic fluid ring and carried out the finite element simulation, The results indicate that it can effectively assist the shape design of the fluid ring and improve the attitude adjustment performance of the fluid ring.…”

“…The existing researches about fluid ring mainly focuses on attitude control, which shows that the fluid ring for attitude adjustment is feasible. In this paper, the characteristics of flow field in magnetohydrodynamic momentum ring proposed by [8,9] are studied. The coupling numerical method is used to study the variation of fluid velocity with time in the fluid ring.…”