The Error Analysis of Pseudodynamic Test underMultiple Sampling Measurements

• Main Authors: Cheng-chong Yein, 顏呈璁
• Other Authors: Shih-Yu Chu
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/54526330170784399001

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 97 === In order to improve the application of pseudodynamic testing, an explicit numerical in-tegration method of two-degree-of-freedom system is developed in this study. In the tradi-tional pseudodynamic testing, single sampling period is used to ensure that the actuator will track the required command correctly and to get the accurate load-cell measurement. Due to lacking of understanding of the actuator‘s operation condition and the behavior of testing component, it needs to selected a longer sampling period to comply with the actua-tor’s settling time. In this study, a multiple sampling technique is developed to get more measurements within the sampling period of sending command signal. Both integration method and multiple sampling technique are implemented by using software packages – Real-Time Window Target and Simulink provided by the MathWorks, Inc. Detail investi-gations on the actuator’s operation and variations of measured signals from testing com-ponent can be easily performed by the INSTRON 8800 material testing machine, so that an appropriate sampling period can be chosen to conduct the pseudodynamic testing. Fur-thermore, the sensitivity analysis of accumulated error and restoring force measurement are studied.