Abstract
Large inertia load has been widely used in space driving mechanisms, but the research concerning theory is still an unexplored scientific field. Towards the problem of nonlinear disturbance in space driving mechanism with large inertia load, a 14-DOF (Degree of Freedom) nonlinear, time-varying, dynamic model of two-stage spur gear system was established, taking into consideration time-varying stiffness, backlash and transmission error. The dynamic response of the load, under large or small inertia was investigated, basing on the dynamic model. The results indicate that at starting, normal operation and braking, large inertia load system has obvious hysteresis, compared to small inertia. The factors that improve dynamic response speed under large inertia load were studied. The results indicate that improving the stiffness and damping of the output shaft and changing the material of second gear pair to titanium alloy are helpful in improving the dynamic response speed of the system. Some results enrich the research of two-stage spur gear nonlinear model and large inertia load, since they provide important reference for the actual design of the gear system.
Highlights
Gear is one of the most widely used key components in mechanical equipment
The results indicated that the nonlinear dynamic response is affected by external excitation
A nonlinear, time-varying dynamic model of 14-DOF and two-stage spur gears was demonstrated in this paper, to examine the time-varying and nonlinear disturbance problems caused by a large inertia load-space drive mechanism, considering simultaneously the backlash, time-varying stiffness, transmission error and other factors
Summary
Gear is one of the most widely used key components in mechanical equipment. Gear systems are often used to decelerate, increase available torque and change the direction of energy transmission. NONLINEAR DYNAMIC RESPONSE ANALYSIS OF TWO-STAGE SPUR GEAR SPACE DRIVING MECHANISM WITH LARGE INERTIA LOAD. Shen et al [13] used the incremental harmonic balance method (IHBM) to analyze the nonlinear dynamic model of single-degree-of-freedom spur gear with backlash, time-varying stiffness and static transmission error considered and adopted the numerical simulation method to investigate the chaotic response of the gear system. A nonlinear, time-varying dynamic model of 14-DOF and two-stage spur gears was demonstrated in this paper, to examine the time-varying and nonlinear disturbance problems caused by a large inertia load-space drive mechanism, considering simultaneously the backlash, time-varying stiffness, transmission error and other factors. Some results of this paper contribute to the research of two-stage spur gear nonlinear model and large inertia load They offer useful information towards the actual design of the gear system. The application of these findings is not limited at the field of aerospace, and provides a certain reference value in other scientific fields, such as machine tools, wind power equipment and shipping
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