Unbalance identification for mainshaft system of 2-DOF precision centrifuge: A displacement sensor-based approach

Precision centrifuge is an important electromechanical equipment which is used to test and calibrate inertial components, and dynamic unbalance is the most egregious factor which influences its performance and causes vibration. In this paper, the problem of dynamic unbalance identification for mainshaft system of a 2-DOF precision centrifuge is investigated. The causes which result in dynamic unbalance with respect to the introduced mainshaft system are discussed, and a dynamical analytical model is established in the framework of ADAMS to facilitate the analysis. By using two axis-layout displacement sensors, a new algorithm is proposed by considering both of the centrifugal force and the gravity of the unbalance mass, and further an integrated identification approach is developed. The effectiveness of the approach is analyzed by numerical simulations in ADAMS environment, and some experimental studies are also demonstrated to illustrate the validity of our work.