目的：研究联轴器扭转刚度对离心机系统转速稳定度的影响。方法以Matlab/Simulink数学仿真软件为工具，通过建立包含联轴器扭转刚度及阻尼特征模块的离心机转速伺服控制系统仿真模型，分析联轴器扭转刚度对离心机系统转速稳定度的影响。结果选用扭转刚度较高的联轴器有助于提升离心机系统对抗外界扰动扭矩的能力，选用扭转刚度较低的联轴器能够降低系统驱动环节固有扰动扭矩造成的影响。结论对联轴器扭转刚度的选择应根据离心机扰动扭矩的具体组成决定。%ABSTRACT:Objective To study the effect of the torsional stiffness of shaft coupling on the speed stability of centrifuge systems. Methods Using the MATLAB/Simulink simulation software as a tool, the simulation model of the centrifuge speed servo control system containing the module of shaft coupling's torsional stiffness and damping characteristics was built, and the effect of the torsional stiffness of shaft coupling on the speed stability of centrifuge systems was analyzed. Results It was shown that:selection of shaft coupling with higher torsional stiffness could help the centrifuge systems to promote the capability against the external disturbance torque, while selection of shaft coupling with lower torsional stiffness could reduce the impact caused by the inherent disturbance torque in the servo-drive system. Conclusion The selection of torsional stiffness of the shaft coupling should be decided by the disturbance torque composition of the centrifuge.
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