This paper presents an idea for the Mu-Synthesis robust control of 3D bar structure
vibration with using a piezo-stack actuators. A model of the 3D bar structure with
uncertain parameters is presented as multi-input multi-output (MIMO) dynamics.
Nominal stability and nominal performances of the open-loop 3D bar structure dynamic
model is developed. The uncertain model-based robust controller is derived due to voltage
control signal saturation and selected parameter perturbations. The robust control
performances and robustness of the system due to uncertainties influence is evaluated
by using singular values and a small gain theorem. Finally, simulation investigations and
experimental results shown that system response of the 3D bar structure dynamic model
with taken into account perturbed parameters met desired robust stability and system
limits. The proposed robust controller ens