岩土工程学报2024，Vol.46Issue(z1)：22-26,5.DOI:10.11779/CJGE2024S10047
迭代算法与柔性结构对离心机振动台控制性能影响
Influences of iterative algorithms and flexible structures on control performance of centrifugal shaking table
摘要
Abstract
Currently,there is a lack of understanding regarding the impact of iterative algorithms and flexible structures on the control performance of centrifugal shaking table.In particular,the hinge devices,serving as the flexible connecting structures,have been widely applied in many centrifugal shaking tables to diminish the risks posed by deformations of the platform and bucket under centrifugal force loads to the safety of the actuators.Using a centrifugal shaking table with loads of 1500 kg as a sample,the typical seismic waves with different intensities and frequency bands are selected as the control targets.The influences of the iterative algorithms and flexible structures on the control performance of the centrifugal shaking table are investigated.The results indicate that under the frequency bandwidth varying from 20 to 200 Hz,the impact of the iterative algorithms on the maximum peak error,average peak error and average spectral area error can be neglected.The average peak errors before and after using the iterative algorithms are 5.90%and 6.15%,respectively,and the average spectral area errors are 5.02%and 4.94%,respectively.The flexible structures significantly affect the reproduction accuracy of seismic waves with acceleration peaks≤7.5g,especially in the high-frequency range of 80 to 150 Hz.For the seismic waves with acceleration peaks≥20g,the impact on reproduction accuracy is negligible in the frequency range of 20 to 120 Hz.However,the influences on the reproduction capability of small-amplitude components in the frequency range of 120 to 170 Hz cannot be ignored,which is inferior to the condition without the flexible structures.Simultaneously,under the condition without the flexible structures,a comparison of the measured platform output waves for the same input load under different loads reveals no significant differences in the peak errors and spectral area errors between the two output waves.This proves the good repeatability and stability of centrifugal shaking table.The research methods and conclusions have significant guiding value and scientific significance for improving the understanding of the influencing factors of the control performance of the centrifugal shaking table and improving the design method.关键词
离心机振动台/控制性能/迭代算法/柔性结构Key words
centrifugal shaking table/control performance/iterative algorithm/flexible structure分类
土木建筑引用本文复制引用
王永志,贾仕林,韩俊伟,王体强,张雪东,汤兆光,周燕国,张宇亭..迭代算法与柔性结构对离心机振动台控制性能影响[J].岩土工程学报,2024,46(z1):22-26,5.基金项目
中国地震局工程力学研究所基本科研业务费专项项目(2023B08) （2023B08）
国家自然科学基金项目(52278374,51609218) （52278374,51609218）
