Robust Acceleration Control of Electrodynamic Shaker Using μ -Synthesis

This paper presents an acceleration control of an electrodynamic shaker that cannot employ the iteration control method freely. There are considerable points in the design phase of the acceleration controller. The transfer functions using the acceleration controlled variable have zero at the origin and two crossover frequencies. It is not easy to design the acceleration controller by using the conventional design method directly. The controller is designed by using μ–synthesis based on these points. Further, a two degrees of freedom controller is designed to improve the transient response. Finally, the experiment using an actual electrodynamic shaker is carried out. A comparison between the proposed controller and the controller derived from the iteration control method is shown.