| 盛严,潘颖,王超.结构主动控制的LQG/LTR改进方法[J].计算力学学报,2004,21(5):575~579 |
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| 结构主动控制的LQG/LTR改进方法 |
| Modified LQG/LTR control method in active structural control |
| 修订日期：2003-01-13 |
| DOI：10.7511/jslx20045102 |
| 中文关键词: 结构主动控制 改进的LQG／LTR方法 鲁棒性 比较 |
| 英文关键词:active structural control,modified LQG/LTR,conventional LQG/LTR,robustness,comparison |
| 基金项目:国家自然科学基金(10272986)资助项目. |
| 盛严 潘颖 王超 |
| [1]烟台大学土木工程系,山东烟台264005 [2]上海工程技术大学基础学院,上海200336 [3]西安交通大学工程力学系,陕西西安710049 |
| 摘要点击次数: 1127 |
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| 中文摘要: |
| 提出一种改进的LQG／LTR(Linear Quadratic Gaussian synthesis with a Loop Transfer Recovery)结构主动控制方法，一种新的补偿器结构被用于回路传输恢复(LTR)。这个补偿器有以下优点：(1)它是开环稳定的；(2)它能保证整个闭环系统的稳定性；(3)更重要的是．对于相同的回路传输恢复度，它所需要的增益要小于传统LQG／LTR方法的基于观测器的控制器增益。还有，就是这个新的补偿器比传统的基于观测器要有较好的恢复性能。最后，数值算例验证了本文方法的有效性。 |
| 英文摘要: |
| This paper presents a new active structural control design method comparing with the conventional linear-quadratic-Gaussian synthesis with a loop-transfer-recovery (LQG/LTR) control approach for structures subjected to ground excitations. It results in an open-loop stable controller. Also the closed-loop stability can be guaranteed. More importantly, the value of the controller's gain required for a given degree of LTR is orders of magnitude less than what is required in the conventional LQG/LTR approach. Also, for the same value of gain, the proposed controller achieves much better degree of recovery than the LQG/LTR-based controller. Once this controller is obtained, the worse of control force saturation is either eliminated or at least dampened, and the controller band-width is reduced and consequently the control signal to noise ratio at the input point of the dynamic system is increased. Finally, numerical examples illustrate the above advantages. |
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