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A model of mechatronic system with two degrees of freedom containing
hardening spring nonlinearity in the mechanical part and softening
nonlinearity in electrical feedback loop is presented. The hardening spring
nonlinearity is caused by the impacts on the stops with finite stiffness,
the softening nonlinearity describes the dependence of output
current on voltage input of the power amplifier, in which the limitation
of output current occur. The response of the system, the mathematical model
of which is transformed into the dimensionless form, is studied for different
parameters of nonlinear characteristics.
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