| 张子健,徐敏,陈士橹.机翼颤振的混合灵敏度H∞鲁棒控制器设计[J].计算力学学报,2010,27(4):661~666 |
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| 机翼颤振的混合灵敏度H∞鲁棒控制器设计 |
| Mixed sensitivity H∞ controller designing for active flutter suppression |
| 投稿时间：2008-06-24 |
| DOI：10.7511/jslx20104015 |
| 中文关键词: 颤振抑制 H∞控制 混合灵敏度 回路成型 鲁棒性 |
| 英文关键词:flutter suppression H∞ control mixed sensitivity loop-shaping robustness |
| 基金项目:高等学校博士学科点专向科研基金(20070699054);国家自然科学基金重大研究计划(90405002)资助项目. |
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| 中文摘要: |
| 主动颤振抑制技术是未来弹性飞行器设计中的一项关键技术,越来越受到广泛的关注。但传统的LQG方法鲁棒性很差,限制了其实际应用。本文采用混合灵敏度H∞控制方法,并结合回路成型技术设计了机翼颤振抑制的鲁棒控制器。此方法直接针对回路的灵敏度函数和补灵敏度函数性质,根据颤振抑制系统期望的回路频域特性要求,通过选择合适的加权函数形状获得了满意的闭环系统性能,从而实现对颤振的鲁棒抑制。其特点是能够方便直观的获得系统所期望的频域性能,并具有良好的鲁棒性和抑噪能力,非常有利于工程实用。最后利用典型的二维机翼俯仰沉浮气动弹性系统模型,分别采用混合灵敏度H∞控制器和LQG控制器对机翼颤振进行抑制。仿真结果表明,本文所设计的控制器将颤振速度提高了12.2％,能够更加有效地抑制机翼颤振。 |
| 英文摘要: |
| 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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