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基于FRA精细模型的航天器三轴姿态稳定控制

DOI: 10.13700/j.bh.1001-5965.2013.0316, PP. 479-485

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Abstract:

针对非线性影响因素对FRA控制精度的影响,分析了黏性对射流动量控制(FRA,FluidicRingActuator)模型精度的影响以及摩擦对压力泵控制精度的影响.对前者,推导出黏性对FRA角动量传递的影响方程,得到附面层动量损失厚度模型以及管流动量损失模型;对后者,设计了摩擦补偿控制律,以改善指令跟踪精度.将上述两部分模型组合到FRA动力学模型中,得到了适用于高精度姿态控制的精细FRA动力学与控制模型.设计了姿态控制律并进行了稳定性证明.仿真结果验证了FRA精细模型对提高姿态控制精度的有效性.

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