Robust control of electrodynamic shaker with disturbance-force compensator

This paper presents a disturbance-force compensator for an electrodynamic shaker. The characteristic of a shaking system is considered to be nonlinear and variable because of the influence of the test piece. In order to compensate for this problem, the influence of the disturbance force needs to be suppressed. It is assumed that the disturbance force is measured in the form of a controlled variable, and the controller is designed using μ-synthesis by considering the uncertainty of the shaker. Finally, the experiment using the electrodynamic shaker is executed. A good performance is achieved for the variation in the characteristic of the controlled plant.