Influence of thrust modulation on a satellite with flexible non-latching booms
Influence of thrust modulation on a satellite with flexible non-latching booms
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DOI：
10.1007/s40430-022-03887-z
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发表时间：
2022-11
影响因子：
2.2
通讯作者：
Lorenzzo Quevedo Mantovani;W. G. dos Santos;F. Cardoso-Ribeiro;Josué Cardoso dos Santos
中科院分区：
文献类型：
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作者：
Lorenzzo Quevedo Mantovani;W. G. dos Santos;F. Cardoso-Ribeiro;Josué Cardoso dos Santos
立方体卫星的使用正在增加到科学和技术的广泛领域，其中一些需要精确的姿态确定和控制系统（ADCS）和可展开的结构，如吊杆。然而，小卫星通常没有闭锁系统来锁定其吊杆，这会引入振动和振荡，并可能降低ADCS的性能。此外，有些应用提出了立方体卫星在近距离和协调下运行的任务，要求推进器进行轨道机动，如计划中的ITASAT-2航天器编队飞行使命，该任务将有非闭锁吊杆和推进器。这些推进器可以激发卫星的非闭锁柔性吊杆，增强其对ADCS的影响。此外，开关推力器通常使用脉宽调制（PWM）控制，在系统的动态中引入更多的影响。因此，ITASAT-2使命的动机，这项工作的目的是了解在非闭锁柔性吊杆动力学的推力器的PWM参数的影响。此外，这项工作提出了一个框架，以获得PWM参数对卫星的影响，这可以应用到其他小型航天器。结果表明，与调制力相比，推力器提供连续力时臂架的变形减小。在非闭锁柔性臂系统的频率附近识别出变形和旋转的峰值。此外，还验证了在不同的PWM周期下，锁存吊杆中可能发生共振。此外，非闭锁机制和PWM参数的影响，观察到在系统形成的大变形区域。
The use of CubeSats is increasing to a wide range of areas in science and technology with some of them requiring an accurate Attitude Determination and Control System (ADCS) and deployable structures such as booms. However, small satellites commonly do not have latching systems to lock their booms, which introduce vibrations and oscillations and might degrade the ADCS performance. Also, some applications propose missions with CubeSats operating in close proximity and coordination, requiring thrusters to perform orbit maneuvers such as the planned ITASAT-2 spacecraft formation flying mission, which will have non-latching booms and a thruster. These thrusters can excite the satellite’s non-latching flexible booms, intensifying their impact on the ADCS. Additionally, on-off thrusters are usually controlled using a Pulse-Width Modulation (PWM), introducing more effects in the system’s dynamic. Hence, motivated by the ITASAT-2 mission, this work aims to understand the impact of a thruster’s PWM parameters in the non-latching flexible booms dynamics. Also, this work presents a framework to obtain the influence of PWM parameters on a satellite, which can be applied to other small spacecraft. The results show that booms’ deformation decreases when the thruster provides a continuous force, compared to a modulated force. Peaks in deformation and rotation were identified near frequencies of the non-latching flexible booms’ system. Further, it was verified that resonances might occur in latched booms at distinct PWM periods. Moreover, the influence of the non-latching mechanism and PWM parameters was observed in the system forming regions of larger deformation.