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首页> 外文会议>ASME/BATH symposium on fluid power and motion control >NONLINEAR MODELING AND EXPERIMENTAL VALIDATION OF UNI-AXIAL SERVO-HYDRAULIC SHAKING TABLE
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NONLINEAR MODELING AND EXPERIMENTAL VALIDATION OF UNI-AXIAL SERVO-HYDRAULIC SHAKING TABLE

机译：单轴伺服液压振动台的非线性建模与实验验证

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摘要

An effective way for the testing of a large number of systems is using single and multi-axis shaking tables. Among the possible applications, the civil engineering field stands out for the testing of structures, or part of them, both on a reduced and on a full scale. However, design a high performance controller for a servo-hydraulic shaking table is a difficult problem due to . its non-linarites and large friction forces. The goal of this paper is to develop and experimentally validate a robust numerical model that simulates the acceleration behavior of a uni-axial servo-hydraulic shaking table system with considering three friction models, the LuGre model, the modified LuGre model and the new modified LuGre model. First, a full system model of servo-hydraulic system is developed based on fluid mechanical expressions and then the friction force of hydraulic cylinder is modeled and validated on the real shaking table. Data of the experiment are gathered from input command valve, and the output acceleration and position of the table. All models are simulated by using MATLAB and SIMULINK computer program. The parameters of the system and the friction models are estimated by using least square method (LSM). Finally, the comparisons of simulated re- sults with experimental ones show that the model of the system with considering third model of the friction can predict accurately the shaking table's behaviors.
机译：测试大量系统的有效方法是使用单轴和多轴振动台。在可能的应用中，土木工程领域在缩小或全面测试结构或其中一部分结构方面脱颖而出。然而，由于伺服液压振动台的高性能控制器的设计是一个难题。它不含芳烃，摩擦力大。本文的目的是开发并通过实验验证鲁棒的数值模型，该模型通过考虑LuGre模型，改良的LuGre模型和新的改良的LuGre三种摩擦模型来模拟单轴伺服液压振动台系统的加速行为。模型。首先，基于流体力学表达式，建立了伺服液压系统的完整系统模型，然后在真实的振动台上对液压缸的摩擦力进行建模和验证。实验数据是从输入指令阀，输出加速度和表的位置收集的。所有模型都是使用MATLAB和SIMULINK计算机程序进行仿真的。使用最小二乘法（LSM）估算系统的参数和摩擦模型。最后，模拟结果与实验结果的比较表明，考虑摩擦的第三种模型的系统模型可以准确地预测振动台的行为。

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