应用MTS控制系统的实时子结构实验

Real-time substructure test with MTS control system

为了进行实时子结构实验,必需分析实验软硬件系统的实时特性.利用美国MTS公司的FlexTest GT控制器建立了实时子结构实验系统,并对一安装粘滞阻尼器的单层框架结构进行了实时子结构实验,实验中粘滞阻尼器为实验子结构,其余部分为数值子结构,实验与计算结果吻合很好.实验表明利用MTS-SCHENCK系统可以满足实时子结构实验对实验系统的要求,且实时子结构实验可以很好地反映速度相关型阻尼器的性能.另外,根据实验结果提出一种作动器响应简化模型,并根据这个模型分析了时滞对实验结果的影响,分析结果表明实验误差随时滞的增大而增大.

To carry out a real -time substructure test, it is necessary to analyse the real -time performance of software and hardware of the testing system. A real-time substructure testing system was set up with MTS Flex- Test GT controller, and then was applied to the test of a single story frame structure incorporated with a viscous damper. The bare frame of the tested structure was the numerical substructure, and the damper was the physical substructure. The test results matched well with the calculated ones. The results show that the MTSSCHENCK testing system satisfies the demands of real - time substructure testing, and the real-time substructure testing can well reflect the performance of the structure with velocity dependent components. A simplified actuator response model was then developed and the effect of time delay on the tested results with this model was analysed. The result shows that the test error increases with the increasing time delay.