Development of numerical-substructure-based and output-based substructuring controllers

摘要

Substructured and analytical frameworks for the development of numerical-substructure-based and output-basednsubstructuring controllers are proposed. The principle of numerical-substructure-based control systems utilisesnonline parameters and signals related to numerical substructures for the control gain synthesis. Output-basedncontrollers consider only online information related to transfer systems. The resulting linear feedforward andnfeedback controllers are synthesised using state-space and transfer-function techniques, assuming that thendynamics of tested specimens are to be completely unknown, and thus can cope with nonlinear substructuringntasks. Selection of the controllers for implementation depends on the synchronisation requirement and thendynamic properties of the controllers in real-time conditions. Experimental results of a two-mass-spring systemnverifying the controller designs are presented, which also show that the addition of feedback controllers can effectivelynreduce the synchronised errors. Copyright © 2012 John Wiley & Sons, Ltd.