Probabilistic Analysis of a Linearized Servo-Hydraulic Model for Real-Time Structural Testing. Issue 13 (3rd October 2022)

• Record Type: Journal Article
• Authors: Peng, Changle; Chen, Cheng; Hou, Hetao; Xu, Weijie
• Is Part Of: Journal of earthquake engineering. Volume 26:Issue 13(2022)
• Page Start: 6656
• Page End: 6675
• Publication Date: 2022-10-03
• Subjects: Real-time hybrid simulation -- servo-hydraulic dynamics -- generalized likelihood uncertainty estimation -- uncertainty analysis -- actuator tracking; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1080/13632469.2021.1927906
• Languages: English
• ISSNs: 1363-2469

Abstract

ABSTRACT: Servo-hydraulic actuators are often used in real-time hybrid simulation to impose desired displacements to specimens and to maintain the boundary compatibility between substructures. Previous studies often consider the servo-hydraulic system as deterministic while experimental results indicate otherwise due to different sources of uncertainties. This study utilizes the generalized likelihood uncertainty estimation method to explore the uncertainties in servo-hydraulic dynamics. Probabilistic distribution and statistical moments are derived for parameters of a linearized servo-hydraulic model based on experimental results. The analysis results are further applied to demonstrate the effects of servo-hydraulic uncertainties on actuator tracking and compared with the corresponding deterministic model.