Real-time hybrid simulation (RTHS) is a versatile testing technique for performance evaluation of structures subjected to dynamic excitations. Research revealed that compensation for the delay induced by the dynamics of the loading system and other factors is a critical issue for obtaining reliable test results. Lately, a two-stage adaptive delay compensation (TADC) method was conceived and performed on the benchmark problem of RTHS. For this method, the main part of the system delay is coarsely compensated by the classic polynomial extrapolation (PE) method; the second stage represents a fine remedy for the remaining delay with adaptive compensation based on a discrete model of the loading system. As an extension of this study, this paper aims to further verify and reveal the performance of this method through real tests on a viscous damper specimen. In particular, loading tests with a swept signal and RTHS with sinusoidal and seismic excitations were carried out. Investigations show that the TADC method is endowed with smaller parameter variation ranges, simple yet effective initialization or a soft-start process, less dependence on initial parameter estimation accuracy, and best compensation performance.

中文翻译：

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实时混合仿真的两阶段自适应延迟补偿方法的测试验证

实时混合仿真（RTHS）是一种用于测试动态激励结构性能的通用测试技术。研究表明，补偿加载系统的动力学和其他因素引起的延迟是获得可靠测试结果的关键问题。最近，针对RTHS的基准问题，构思并执行了两阶段自适应延迟补偿（TADC）方法。对于这种方法，系统延迟的主要部分通过经典的多项式外推法（PE）进行了粗略的补偿。第二阶段代表了基于加载系统离散模型的，具有自适应补偿的剩余延迟的优良解决方案。作为这项研究的延伸，本文旨在通过对粘性阻尼器试样进行实际测试来进一步验证和揭示该方法的性能。特别是，使用扫频信号进行负载测试，并使用正弦和地震激励进行RTHS。研究表明，TADC方法具有较小的参数变化范围，简单而有效的初始化或软启动过程，对初始参数估计精度的依赖性较小以及最佳的补偿性能。