PSEUDO-FAULT INDUCTION IN ENGINEERING STRUCTURES - MULTIINPUT MULTIOUTPUT CONTROL

In a previous paper, it was demonstrated that any linear system could be made to respond to harmonic excitation as if a static nonlinearity of specified type and position were present, this response being obtai ned at a single predetermined point on the structure. The method requi res the excitation of the linear structure by an additional or auxilia ry input. In the present paper, the theory is extended to allow the po ssibility of producing a specified nonlinear response at more than one point on a linear structure. It is shown that N responses can be obta ined by specifying N or less auxiliary inputs. The theory is also exte nded to provide for polynomial damping in addition to stiffness nonlin earity. The theory is validated using numerical simulation of MDOF lum ped-parameter systems.