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| Modified LQG/LTR control method in active structural control |
| Revised:January 13, 2003 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20045102 |
| KeyWord:active structural control,modified LQG/LTR,conventional LQG/LTR,robustness,comparison |
| Sheng Yan~ |
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| Abstract: |
| 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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