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首页> 外文期刊>Journal of Engineering Mechanics >Nonlinear system modeling and velocity feedback compensation for effective force testing
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Nonlinear system modeling and velocity feedback compensation for effective force testing

机译:非线性系统建模和速度反馈补偿,以进行有效的力测试

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摘要

Effective force testing (EFT) is a test procedure that can be used to apply real-time earthquake loads to large-scale structural models. The implementation of the EFT method requires velocity feedback compensation for the actuators in order to apply forces accurately to test structures. Nonlinearities in the servosystem have a significant impact on the velocity feedback compensation and test results when large flow demands are present, which can be caused by large structural velocities and/or large forces applied to the test structure. This paper presents a nonlinear servosystem model, upon which a nonlinear compensation scheme is proposed. The model and compensation scheme are experimentally verified. The results indicate that the proposed model accurately describes the servosystem behavior, and with the nonlinear velocity feedback compensation, real-time dynamic testing can be conducted using the EFT method.
机译:有效力测试(EFT)是一种测试程序,可用于将实时地震荷载应用于大型结构模型。 EFT方法的实现需要对执行器进行速度反馈补偿,以便将力准确地施加到测试结构上。当存在大流量需求时,伺服系统中的非线性会严重影响速度反馈补偿和测试结果,这可能是由于结构速度大和/或施加在测试结构上的力大所致。本文提出了一种非线性伺服系统模型,并在此模型上提出了非线性补偿方案。通过实验验证了模型和补偿方案。结果表明,所提出的模型能够准确地描述伺服系统的行为,并且利用非线性速度反馈补偿,可以使用EFT方法进行实时动态测试。

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