Title :
Nonlinear modeling and control of a hydraulic seismic simulator
Author :
Newell, Devin P. ; Dai, Hongliang ; Sain, Michael K. ; Quast, Peter ; Spencer, B.F., Jr.
Author_Institution :
Dept. of Electr. Eng., Notre Dame Univ., IN, USA
Abstract :
Hydraulic actuators, in combination with servo valves, are used to drive unidirectional seismic simulators. The fluid flow within the hydraulic actuator inherently leads to nonlinear behavior for the system. This paper presents a nonlinear model of the seismic simulator at the University of Notre Dame. The validity of the model is demonstrated experimentally. A control strategy uses a desired earthquake acceleration response to generate specific reference inputs by means of an open loop optimization. A Kalman-filter-based controller is employed. The control strategy is implemented and tested by experiment
Keywords :
Kalman filters; actuators; earthquakes; hydraulic control equipment; nonlinear control systems; servomechanisms; test facilities; valves; Kalman-filter-based controller; earthquake acceleration response; hydraulic actuators; hydraulic seismic simulator; nonlinear control; nonlinear modeling; open loop optimization; servo valves; unidirectional seismic simulators; Coils; Collision mitigation; Electrohydraulics; Fluid flow; Hydraulic actuators; Mathematical model; Open loop systems; Pistons; Springs; Valves;
Conference_Titel :
American Control Conference, Proceedings of the 1995
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2445-5
DOI :
10.1109/ACC.1995.529360
