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首页> 外文期刊>International journal of structural stability and dynamics >Sensitivity Analysis on Optimal PID Controller for Nonlinear Smart Base-Isolated Structures
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Sensitivity Analysis on Optimal PID Controller for Nonlinear Smart Base-Isolated Structures

机译：非线性智能基地隔离结构最优PID控制器的敏感性分析

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摘要

This paper presents a sensitivity analysis on the performance of optimal proportional-integral-derivative (PID) controller for use in nonlinear smart base-isolated structures with uncertainties. A set of nine performance indices is defined to evaluate the performance of the controller in the presence of uncertainties in the superstructure, lead rubber bearing (LRB) seismic isolation system, and applied loads. The time delay effect on the stability and performance of the PID controller is also examined. The results show that the PID controller is robust against the uncertainties up to +/- 15% in the damping and stiffness coefficients of the superstructure, the yield force of the LRB and the artificial earthquake. In the case with +/- 15% of uncertainty, the input energy entering into the structure is increased with respect to the nominal model. However, the changes of the performance indices related to the damage energies are negligible. An uncertainty of similar to 20% in the stiffness coefficient and stiffness ratio of the LRB gives an increase of 15% in the maximum and root mean square (RMS) of the structural responses. In the case with similar to 20% of uncertainty, the damage and damping energies do not change in comparison with the case of the nominal model, but a significant decay in the performance index related to the input energy response is obtained in this case. Not all performance indices are sensitive to time delay. For large time delays, the performance index for the seismic input energy increases significantly, while the maximum damage and damping energies increase up to 5% and 10%, respectively.
机译：本文介绍了对非线性智能基座隔离结构的最佳比例积分衍生物（PID）控制器的性能的灵敏度分析。定义了一组九个性能指标，以评估控制器在超结构，铅橡胶轴承（LRB）地震隔离系统和施加载荷的不确定性存在下的性能。还检查了对PID控制器的稳定性和性能的时间延迟影响。结果表明，PID控制器在上层建筑的阻尼和刚度系数中的不确定性较高，该不确定因素，LRB的屈服力和人工地震。在+/- 15％的不确定性的情况下，相对于标称模型增加进入结构的输入能量增加。但是，与损伤能量相关的性能指数的变化可以忽略不计。 LRB的刚度系数和刚度比中类似于20％的不确定性在结构反应的最大和根部均线（RMS）中增加了15％的增加。在类似于20％的不确定性的情况下，与标称模型的情况相比，损坏和阻尼能量不会改变，但在这种情况下获得了与输入能量响应相关的性能指标中的显着衰减。并非所有性能指数都对时间延迟敏感。对于大的时间延迟，地震输入能量的性能指数显着增加，而最大损坏和阻尼能量分别增加高达5％和10％。

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