A modified synchronous control method for 2-DOF arm-typed precision centrifuge

摘要

Precision centrifuge is an important electromechanical equipment which is used to test and calibrate model parameters of accelerometers. For a 2-DOF(Degree of Freedom) precision centrifuge, which offers a high overload environment and two rotating degree of freedom at the same time, a continuously rotary countershaft is configured reasonably to counteract the rotation motion of the mainshaft system in order to maintain the directivity of the unit under test in the inertial space. Therefore, the pointing accuracy is a significant index, which is influenced mostly by the angular velocity tracking error between the mainshaft and the countershaft. In this paper, the mathematical models of the mainshaft and the countershaft are established by experimental data and frequency spectrum analysis tools, respectively. Also, several synchronous control methods are presented and compared for the 2-DOF arm-typed precision centrifuge by simulation experiments.