Background

A lot of efforts have been devoted to the instrument development of simultaneous precision positioning and vibration control for on-orbit optical payloads. However, only series schemes with two active elements which, in fact, are coarse and fine hybrid mechanisms, are researched in despite of adverse impacts on the whole mass and dimensions, control strategy and energy usage. Thus, a new magnetostrictive integrated actuator with just one single active element is proposed to realize those two functions together.

Methods

The detailed scheme is introduced, and the selection of some key parameters are explained first. Then, the explicit expressions are derived and the performances are preliminarily studied by numerical simulations. Finally, a prototype is fabricated, and experimental tests are carried out in view of external disturbances with different frequencies.

Conclusions

The results indicate that the developed actuator can not only actively control the low-frequency disturbances but also can passively suppress the middle-high frequency micro-vibrations during precision positioning.

中文翻译：

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轨道光学有效载荷的同时精确定位和振动控制：集成的执行器开发和分析

背景

在轨光学负载的同时精确定位和振动控制的仪器开发方面已付出了很多努力。然而，尽管对整体质量和尺寸，控制策略和能源使用产生了不利影响，但仅研究了具有两个主动元素的串联方案，而这些元素实际上是粗混合混合机制。因此，提出了一种仅具有单个有源元件的新型磁致伸缩集成致动器，以一起实现这两个功能。

方法

介绍了详细的方案，并首先说明了一些关键参数的选择。然后，导出了明确的表达式，并通过数值模拟对性能进行了初步研究。最后，制作了一个原型，并针对不同频率的外部干扰进行了实验测试。

结论

结果表明，所开发的执行器不仅可以主动控制低频干扰，而且可以被动地抑制精密定位过程中的中高频微振动。