The Dynamics Of Toroidal Drive

Toroidal drive is predominant in large speed ratio, high transmission efficiency, strong load-carrying capacity. It, which can transmit heavy torque in compact spaces, is particularly applicable in aviation, cosmonautics and other high-technology filed. The bad dynamic characteristics of the system will result in noise and heavy dynamic load in working progress. Therefore, the profoundly study of the drive is very important in the theory and applications. In this paper, the dynamic characteristic of toroidal drive is fully investigated in these aspects of elastodynamic model, free vibration, forced vibration, parametric vibration. The main results of the paper are as follows:The elastodynamic model of the toroidal drive is presented. Each component has in general six rigid-body degree-of-freedom. The dynamic equation of the system is derived. The mode of the free vibration and the effects of support stiffness on the system vibration are analyzed, which provide a theoretical basis for the system structural dynamic parameters design.The vibration equations of the toroidal drive under exciting force are deduced. The time and frequency responses of the mechanical system to exciting force are studied. The influences of system design parameters on the forced responses are discussed.The vibration equations of the toroidal drive to the excitations of mesh parameters are presented. The time and frequency responses of the system to the excitations of mesh parameters are computed.The electromechanical coupled dynamic model of the electromechanical integrated toroidal drive is founded. The mode of the free vibration for the drive is analyzed.The three-dimensional solid dynamic emulation model of the toroidal drive is presented. By the functional module of the structure dynamics of the three-dimensional modeling software PRO/E, the simulation of the mode emulation for the toroidal drive is accomplished. Compared the theory results with simulation ones, the validity of the theory analysis is proved.