It is constructed that radial impact and rubbing dynamics differential equations of the rotor system having the nonlinear rigidity on the unsteady and non - linear oil film . the bifurcation and chaos behavior of impact and rubbing fault rotor system caused by the parameters of nonlinear rigidity , rotor rotating speed , eccentric mass is analyzed , in the numerical value analysis method . the bifurcation diagrams , maximum lyapunov exponent diagrams , poincar maps , phase plane portraits , trajectories of journal center , time - history curve , amplitude spectra diagrams of the rotor motion are used ( 2 )建立了具有非线性刚度的转子系统在非稳态非线性油膜力作用下的径向碰摩动力学微分方程,并应用含高阶余项的非线性动力方程的线性化数值法研究了此类系统响应的复杂动力学行为,利用转子响应的分岔图、最大lyapunov指数曲线、 poincar截面映射、时域波形、相轨线、轴心轨迹、幅值谱等图形分析了系统响应的周期运动、拟周期运动、倍周期分岔、混沌等运动形式的转化与演变过程,重点研究了非线性刚度、转子转速、偏心质量等系统参数对碰摩故障转子系统的分岔和混沌行为的影响。
The rotor velocity and position can be taken as two states variable of the system by using the ekf on the basis of the theory of the bldcm . based on the measured stator currents and stator voltages , we can estimate the rotor velocity and position . it is very useful for us to study the application of the velocity and position sensorless operation of brushless dc motor drives 在直流无刷电机的原理基础上,利用扩展卡尔曼滤波器将转子转速和位置看成系统的两个状态变量,根据定子侧可测的电流、电压值,逐步估计出转子转速和位置,为无速度和位置传感器无刷直流电机控制系统打下基础。
