摘要
时滞补偿是实时混合试验(RTHS)成功非常关键的环节,传统时滞补偿方法主要针对建筑结构实时混合试验设计,主要关注低频的时滞补偿能力,但航空、交通等领域的结构频率较高,甚至超过10 Hz,高频信号对结构响应的影响不可忽略,较高的结构频率要求更小的时滞保证稳定性,对其进行实时混合试验需要在较宽频带上实现时滞补偿。该文提出了自适应线性二次高斯算法(ALQG)提高对高频信号的时滞补偿能力和稳定性。采用不同轨道梁截面刚度参数的桥梁作为数值子结构进行实时混合试验,检验ALQG算法在车桥耦合系统RTHS中时滞补偿的有效性和稳定性,并与采用ATS的结果进行比较。试验结果表明:ALQG算法能够较好补偿RTHS中的高频信号,补偿效果优于ATS算法。
The time delay compensation is very critical to successful implementation of real-time hybrid simulation(RTHS).The traditional time delay compensation is mainly designed for RTHS of building structures,which focuses on relative low frequency signal compensation capacity.However,the structural frequency in aerospace,transportation and other fields may exceed 10 Hz,and the influence of high-frequency signals on structural response cannot be ignored.And higher natural frequency requires smaller time delay to guarantee the stability.It needs to compensate the time delay in a wider frequency range for RTHS test.It proposes an adaptive linear quadratic Gaussian(ALQG)algorithm to expand the frequency range of time delay compensation,especially to improve the compensation capacity for high-frequency signals.The bridge with different stiffness due to different track beam sections were chosen as numerical substructures to conduct RTHS,and to verify the effectiveness and stability of the ALQG algorithm in high-speed bridge track and train body coupling system(train-bridge coupling system)RTHS.The results of RTHS tests for train-bridge coupling system were compared with those of adaptive time series algorithm(ATS).From the test results,it can be seen that the ALQG algorithm can compensate for the high frequency signals in the RTHS,and has the better compensation performance than ATS algorithm.
作者
张博
周惠蒙
田英鹏
国巍
古泉
王涛
滕睿
ZHANG Bo;ZHOU Hui-meng;TIAN Ying-peng;GUO Wei;GU Quan;WANG Tao;TENG Rui(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin 150080,China;Engineering Seismic Research Center,Guangzhou University,Guangzhou 510006,China;School of Civil Engineering,Central South University,Changsha 410075,China;School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China)
出处
《工程力学》
EI
CSCD
北大核心
2022年第3期75-83,共9页
Engineering Mechanics
基金
国家重点研发计划项目(2018YFF0213301)
国家自然科学基金项目(51878630,51378478,51408565)
黑龙江省杰青基金项目(JC2018018)。
关键词
实时混合试验
车桥耦合系统
自适应线性二次高斯控制
时滞补偿
高频信号
real-time hybrid test
train-bridge coupling system
adaptive linear quadratic Gaussian control
time delay
high frequency signal
