NEEShub will be in read-only mode between 5PM EST on 9/11/2015 - 8AM EST 9/14/2015. Tools will be unavailable during this time. We apologize for the inconvenience.


Support Options

Submit a Support Ticket


Events: Details

Effective Force Test Methods using Robust Loop-Shaping Force Feedback Controller seminar  edit    delete

Category: Seminar
Description: PRESENTED BY
Narutoshi Nakata
Department of Civil Engineering
Johns Hopkins University

This seminar presents an overview of the research program on effective force testing (EFT) at the Johns Hopkins University. EFT is an experimental method that directly applies input dynamic forces to test structures using hydraulic actuators. Though EFT has several advantages over shake table testing and hybrid simulation, it has not been thoroughly explored due to technical challenges in force control such as stability, robustness and control-structure interaction. Recent efforts at the Johns Hopkins University proved that a loop shaping control approach is effective in force control, compensating for the control-structure interaction and suppressing the oil-column resonance of hydraulic actuators. Furthermore, the loop shaping force feedback controller extents the frequency bandwidth up to 25 Hz or even higher. Feasibility of EFT with the loop shaping controller was experimentally validated with linear and nonlinear test structures. The presentation covers issues of force control, experimental validation, and potential applications of EFT. In addition, ongoing efforts on EFT such as multi-degrees-of-freedom EFT and substructure EFT are presented.

Dr. Nakata is an Assistant Professor in the Department of Civil Engineering at the Johns Hopkins University. He holds a B.S. and M.S. in Civil Engineering (Kyoto University, Japan), and a Ph.D. in Civil and Environmental Engineering (University of Illinois at Urbana-Champaign). His research interests include experimental methods for structures, structural control, structural system identification, and earthquake engineering. He is a recipient of the 2010 National Science Foundation Faculty Early Career Development (CAREER) award.
When: Wednesday 20 March, 2013, 1:00 pm EDT - 2:00 pm EDT
Where: WebEx (online)
  1. effective force testing
  2. loop shaping
  3. nees@lehigh
  4. webinar
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30