Laboratory investigation of a fluid-dynamic actuator designed for CubeSats
Laboratory investigation of a fluid-dynamic actuator designed for CubeSats
复制标题
DOI：
10.1016/j.actaastro.2013.11.030
复制
发表时间：
2014-03
影响因子：
3.5
通讯作者：
D. Noack;K. Brieß
中科院分区：
文献类型：
--
作者：
D. Noack;K. Brieß
航天器姿态控制系统的精确操作一般依赖于反作用轮技术进行角动量交换。在本文中，另一种ACS的概念，使用流体环的这项任务。这种新颖的致动器-基于洛伦兹体力-使用直流传导泵，以加速圆形通道结构内的液态金属。作为流体动力致动器（FDA）的工作流体，使用共晶合金Galinstan。沿着运行FDA的微控制器，MEMS陀螺仪在器件上实现闭环操作。在气浮台上成功地进行了几种小卫星姿态控制器模型的姿态控制试验。因此，与类似尺寸的反作用轮相比，在扭矩和功率消耗方面实现了有利的性能。其他显著的优点是无磨损操作和更高的可靠性以及预期的被动阻尼性能。目前正在为在轨测试开发林业局下一代纳米卫星原型。
In general, the attitude control systems (ACS) for precise spacecraft operations rely on reaction wheel technology for angular momentum exchange. In this paper, an alternative ACS concept using fluid rings for this task is presented. This novel actuator—based on Lorentz body force—uses a direct-current conduction pump to accelerate liquid metal within a circular channel structure. As working fluid for the fluid-dynamic actuator (FDA) serves the eutectic alloy Galinstan. Along with a microcontroller that runs the FDA, a MEMS gyroscope is implemented on the device for closed loop operation. Several models of FDAs for small satellites were tested successfully for various attitude control maneuvers on an air bearing platform. Thus advantageous performance has been achieved in terms of torque and power consumption in comparison to similarly dimensioned reaction wheels. Further considerable advantages are wear-free operations and higher reliability as well as expected passive damping properties. A next generation FDA prototype for nano-satellites is currently in development for in-orbit testing.