An enhanced hydraulic actuator control method for large-scale real-time hybrid simulations

Yunbyeong Chae, Brian Phillips, James M. Ricles, Billie F. Spencer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Structural testing often involves the use of servo-hydraulic actuators. The inherent nonlinearity of a servo-hydraulic actuator as well as the nonlinear response of experimental specimens results in an amplitude-dependent behavior of the entire servo-hydraulic system, making it difficult to accurately control the actuator. The existence of the nonlinear response in the servo-hydraulic system can be a critical issue that must be addressed to achieve a successful real-time hybrid simulation involving a large-scale experimental substructure controlled by multiple actuators. In order to achieve improved control of servo-hydraulic systems with nonlinearities, an adaptive time series (ATS) compensator is introduced in this paper. The ATS compensator continuously updates the coefficients of the system transfer function during a real-time hybrid simulation using on-line real-time linear regression analysis. Unlike most existing adaptive methods, the system identification procedure of the ATS compensator does not involve user-defined adaptive gains. Through the on-line updating of the coefficients of the system transfer function, the ATS compensator can effectively account for nonlinearities in the servo-hydraulic system and experimental specimen, resulting in improved accuracy in actuator control. In this study, the exceptional performance achieved in actuator control using the ATS compensator is demonstrated through a real-time hybrid simulation of a large-scale 3-story steel frame structure with large-scale magneto-rheological (MR) dampers.

Original languageEnglish (US)
Title of host publicationStructures Congress 2013
Subtitle of host publicationBridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress
PublisherAmerican Society of Civil Engineers
Pages2382-2393
Number of pages12
ISBN (Print)9780784412848
DOIs
StatePublished - Jan 1 2013
EventStructures Congress 2013: Bridging Your Passion with Your Profession - Pittsburgh, PA, United States
Duration: May 2 2013May 4 2013

Publication series

NameStructures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress

Other

OtherStructures Congress 2013: Bridging Your Passion with Your Profession
CountryUnited States
CityPittsburgh, PA
Period5/2/135/4/13

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Fingerprint Dive into the research topics of 'An enhanced hydraulic actuator control method for large-scale real-time hybrid simulations'. Together they form a unique fingerprint.

  • Cite this

    Chae, Y., Phillips, B., Ricles, J. M., & Spencer, B. F. (2013). An enhanced hydraulic actuator control method for large-scale real-time hybrid simulations. In Structures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress (pp. 2382-2393). (Structures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress). American Society of Civil Engineers. https://doi.org/10.1061/9780784412848.208