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| Mixed sensitivity H∞ controller designing for active flutter suppression |
| Received:June 24, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20104015 |
| KeyWord:flutter suppression H∞ control mixed sensitivity loop-shaping robustness |
| Author | Institution |
| 张子健 |
西北工业大学 航天学院,西安 |
| 徐敏 |
西北工业大学 航天学院,西安 |
| 陈士橹 |
西北工业大学 航天学院,西安 |
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| Abstract: |
| The technique of active flutter suppression is one of the keys in designing aircraft in the future, but the traditional Linear Quadratic Gaussian (LQG) method makes the close-loop system do not have enough robustness, and its practicality is limited. The mixed sensitivity H∞ controller combining loop-shaping theory for active flutter suppression is designed in this paper. It can balance both performance and robustness of system directly, while using loop-shaping method to select suitable frequency weights can obtain satisfying close-loop system performance. Because the performance of system in frequency-domain can be achieved directly through this controller, it is useful for practicing. In a typical pitch and plunge aeroelastic system, a simulation is given using the mixed sensitivity H∞ controller and LQG controller respectively, and the result shows that the controller presented in this paper demonstrates a better performance at open-loop flutter point when compared to the LQG controller, and increased the flutter speed by 12.2％. |
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