New type of vibration structure of vertical dynamic balancing machine

A type of vibration structure of vertical dynamic balancing machine is designed, which is based onthe analysis for swing frame of a traditional vertical dynamic balancing machine. The static unbalance and couple unbalance can be separated effectively by using the machine with the swing frame. By building the dynamics model, the advantages of the structure are discussed. The modal and harmonic response are analyzed by using the ANSYS7.0. By comparing the finite element modal analysis with the experimental modal analysis, the natural frequencies and vibration modes are found out. There are many spring boards in the swing frame. Their stiffness is different and assorts with each other. Furthermore, there are three sensors on the measurementpoints. Therefore, the dynamic balancing machine can measure the static unbalance and couple unbalance directly, and the influence between them is faint. The structure has the function of belt-strain compensation to improve the measurement precision. And the practical result indicates that the vertical dynamic balancing machine is suitable for inertial measurement of flying objects, and can overcome the shortcomings of traditional double-plane vertical dynamic balancing machines. The modeling and analysis of the vibration structure provide theoretic instruction and practical experience for designing vertical dynamic balancing machines. Based on the design principles such as stiffness-matching, frequency-adjacence and strain-compensation and so on,