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首頁> 外文期刊>IEEE Transactions on Instrumentation and Measurement >Frequency-weighting filter selection for H/sub 2/ control of microgravity isolation systems: A consideration of the 'implicit frequency weighting' problem
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Frequency-weighting filter selection for H/sub 2/ control of microgravity isolation systems: A consideration of the 'implicit frequency weighting' problem

機譯：用于H / sub 2 /微重力隔離系統控制的頻率加權濾波器選擇：考慮“隱式頻率加權”問題

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摘要

Many space-science experiments need an active isolation system to provide them with the requisite microgravity environment. The isolation systems planned for use with the International Space Station (ISS) have been appropriately modeled using relative position, relative velocity, and acceleration states. In theory, frequency-weighting design filters can be applied to these state-space models, in order to develop optimal H/sub 2/ or mixed-norm controllers with desired stability and performance characteristics. In practice, however, since there is a kinematic relationship among the various states, any frequency weighting applied to one state will implicitly weight other states. These implicit frequency-weighting effects must be considered, for intelligent frequency-weighting filter assignment. This paper suggests a rational approach to the assignment of frequency-weighting design filters, in the presence of the kinematic coupling among states that exists in the microgravity vibration isolation problem.
機譯：許多太空科學實驗都需要一個主動隔離系統來為它們提供必要的微重力環境。計劃與國際空間站（ISS）一起使用的隔離系統已使用相對位置，相對速度和加速度狀態進行了適當建模。理論上，可以將頻率加權設計濾波器應用于這些狀態空間模型，以便開發具有所需穩定性和性能特征的最佳H / sub 2 /或混合范數控制器。然而，實際上，由于各種狀態之間存在運動學關系，因此應用于一個狀態的任何頻率加權都將隱式加權其他狀態。對于智能頻率加權濾波器分配，必須考慮這些隱式頻率加權效應。在微重力振動隔離問題中存在狀態之間的運動學耦合的情況下，本文提出了一種合理的方法來分配頻率加權設計濾波器。

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