Affiliation:
1. School of Things Internet Engineering, Jiangnan University, Wuxi, China
Abstract
To address the vibration problem caused by gear clearance in the wind drivetrain, a two-degree-of-freedom internal model control (2-DOF-IMC) method was proposed to suppress the clearance’s nonlinear vibration. The two-mass wind drivetrain with clearance is the object of this paper’s research. First, we discuss the nonlinear characteristics of gear clearance and the mechanism by which vibration occurs. The nonlinear clearance unit is then decomposed into a linear unit and a nonlinear bounded disturbance unit. A suppression disturbance method based on 2-DOF-IMC was proposed to address nonlinear bounded disturbances. The 2-DOF-IMC overcomes the shortcoming of the PID control and the common internal model control (1-DOF-IMC) by allowing for independent adjustment of the anti-disturbance performance, effectively suppressing the nonlinear disturbance caused by gear clearance. A 2-DOF-IMC scheme and an IMC controller are designed, and the method’s effectiveness is validated through simulation.
Funder
National Key research and development Program of China