Advanced Servo-Hydraulic Control and Real-Time Testing of Damped Structures (NEES-2009-0711)

<p><strong>Title</strong>: Advanced Servo-Hydraulic Control and Real-Time Testing of Damped Structures (NEES-2009-0711)</p> <p><strong>Year Of Curation: </strong>2011</p> <p><strong>Description: </strong>The Real-time Multi-directional (RTMD) Earthquake Simulation Testing Facility has recently been commissioned at the ATLSS Center. This facility has state-of-the-art servo-hydraulic equipment (servo-valves, accumulation and piping systems). The control system for this equipment is a digital system with a PID control law programmed on a DSP. A recent study at Lehigh University has established that PID control alone cannot be reliably used for real-time testing of structural components or systems. This is because the overshoot and steady state error in the target displacement of the actuator is too large and a latency in feedback command exists that does not enable accurate control of an actuator under high rates of loading resembling earthquakes.</p> <p><strong>Award: </strong>PITA</p> <p><strong>PIs & CoPIs: </strong>James Ricles</p> <p><strong>Dates: </strong>October 01, 2006 - December 31, 2008</p> <p><strong>Organizations: </strong>Lehigh University, PA, United States</p> <p><strong>Facilities: </strong>Lehigh University, PA, United States</p> <p><strong>Sponsor: </strong>PITA</p> <p><strong>Keywords: </strong>Structural Damping, Real-Time Hybrid Simulation, Actuator Control</p> <p><strong>Publications: </strong></p> <p>"Servo-Hydraulic Actuator Control for Real-Time Hybrid Simulation"</p> <p>"A Tracking Error-Based Adaptive Compensation Scheme for Real- Time Hybrid Simulation"</p> <nb:citations></nb:citations>