The Effects Of Measurement Errors In The
Restoring Force Feedback During Real-time
Hybrid Simulations
Author(s)
A. A. Sorkhabi & O. Mercan
Abstract
Real-time hybrid simulation (RTHS) is a practical and economical experimental
technique that integrates physical testing with computer simulation. In this
method by dividing the structure into two parts, known as the experimental and
analytical substructures, and synchronizing them, the equations of motion are
solved in real-time. Thus, RTHS can capture the load-rate dependencies in an
accurate manner. The implementation of RTHS involves challenges in accurate
control of experimental substructure, execution of the testing algorithms in realtime
as well as the synchronization of signals. One of these challenges is the
measurement errors in restoring force feedback resulting from the random
electrical noise that is usually inevitable in these testing platforms. Since the
measured restoring force is used in command generation, RTHS suffers from
error propagation affecting the accuracy and in some cases the stability of the
simulation results. In this paper, using a recently developed user-reconfigurable
computational/control platform at the University of Toronto, the effects of force
feedback errors on the RTHS results will be investigated considering a wide
range of experimental to analytical stiffness ratios. The accuracy of the RTHS
results will be assessed using tracking indicators that reveal the phase and
amplitude errors between the RTHS results and exact numerical solutions.
Keywords: real-time hybrid simulation, electrical noise, phase error, amplitude
error, user reconfigurable computational/control platform.
Keywords
real-time hybrid simulation, electrical noise, phase error, amplitude
error, user reconfigurable computational/control platform
Related Book
Other papers in this volume
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