In this paper, a novel transient balancing technology for identifying the unbalance parameters of the rotor system is proposed. Through basic coordinate transformation and multi modal analysis of the dynamical equations of rotor system, the calculation method for transient excitation forces is proposed. The transient excitation forces are calculated by the transient responses and modal parameters at several special positions of the rotor model. Then the “feature points” are introduced in the identification procedure and the unbalance parameters are identified by selecting the “feature points” of the calculated excitation forces. The accuracy of the proposed method is demonstrated by numerical simulations and experiments of the rotor system. Identified results of the proposed method are presented for different unbalance parameters and rotor models. Effects of different random noise levels to the displacement signals, varieties in damping and support stiffness are also presented to verify the adaptability and efficiency of the proposed method. The results show that the unbalance parameters estimations are robust with respect to the above influence factors.

在本文中，提出了一种用于识别转子系统不平衡参数的新型瞬态平衡技术。通过转子系统动力学方程的基本坐标变换和多模态分析，提出了瞬态激振力的计算方法。瞬态激振力由转子模型几个特殊位置的瞬态响应和模态参数计算得到。然后在识别过程中引入“特征点”，通过选择计算激振力的“特征点”来识别不平衡参数。转子系统的数值模拟和实验证明了所提出方法的准确性。针对不同的不平衡参数和转子模型，提出了所提出方法的识别结果。还介绍了不同随机噪声水平对位移信号、阻尼变化和支撑刚度的影响，以验证所提出方法的适应性和效率。结果表明，对于上述影响因素，不平衡参数估计是稳健的。