Attitude Dynamics Modeling and Analysis of Aggregated Modular Spacecraft with Magnetically Levitated Spherical Momentum Actuators

作者：Fan Chunshi^*; Fan Da; He Yang; Song Jian; Zhang Nan; Liu Xiaoyun

来源：35th Chinese Control Conference (CCC), 2016-07-27 to 2016-07-29.

• reaction sphere
• 3 Dimensional Reaction wheel
• magnetically levitated actuator
• attitude dynamics

In recent years, high performance smallsats have experienced a rapid advancement, micro/nanosatellites based space system turned more powerful platforms and are to be aggregated as building blocks to construct large spacecraft with enhanced payload capabilities. The mission and technique development requires more compact while better precision and agility attitude control system. Magnetically levitated spherical momentum actuator, namely the reaction sphere or 3 Dimensional Reaction Wheel, is a promising novel kind of control devices to meet the above requirements. We proposed a system level attitude dynamics model of a microsatellite equipped with single and multiple reaction sphere actuators. With analytical comparisons to their flywheel-based counterpart and numerical simulations, we have revealed two unique advantages of the reaction sphere based system as low-level coupling of actuator gyroscopic momentum and a simple additive control torque synthesis among multiple actuators. A rotor inertial momentum direction preservation control method is proposed for diminished cross coupling.

• 出版日期2016
• 单位中国空间技术研究院