一种质量矩飞行器配置方案及其控制问题分析

Scheme of mass moment spacecraft and it's control problem

针对大气层外三轴稳定质量矩飞行器,考虑降低飞行器的成本和重量,提出了应用两套执行机构的配置方案,并利用旋转电机代替直线电机作为执行机构来实现飞行器的姿态调整。在此基础上,利用动量矩定律,建立了飞行器的非线性动力学模型,并对两种执行机构在无推力情况下的姿态调整能力进行了比较,结果表明,旋转式执行机构提高了质量矩飞行器在无推力作用情况下的姿态调整能力。最后,分析了该质量矩飞行器配置方案所存在的控制问题,为下一步的姿态控制设计奠定了基础。

For extra-atmospheric non-spinning mass moment spacecraft, a scheme with two actuators is presented to reduce cost and weight of spacecrafts, in which the rotating actuator is used instead of linear actuator to realize the attitude regulation of spacecrafts. According to the momentum theorem, a dynamical model of spacecrafts is established. The attitude maneuver capability of mass moment spacecraft is compared between the two actuators, which shows that the rotating actuator can improve attitude maneuver capability without thruster. Finally, the attitude control problem is analyzed, which can act as a foundation for attitude control design next.