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- 2016
一种利用起车过程瞬态振动响应的转子动力学参数识别方法
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Abstract:
在分析转子系统起动过程的振动响应组成和振动响应信号中出现拍振现象成因的基础上,提出了一种基于起车过程瞬态振动响应的转子动力学参数时域识别方法。以转子系统起动过程中的失衡振动响应信号替代频域参数识别法中的正弦扫描激振响应信号,来识别转子系统固有频率和阻尼参数的时域信号,同时给出了参数估计原理,并利用仿真信号和实验测试的起车过程振动响应信号对转子系统的一阶固有频率和阻尼进行了计算。结果表明:所提出方法利用了转子起动过程的振动响应信号,其参数识别仅在时域内进行,不需要复杂的激振设备,具有计算简单、应用前景广阔等特点。
Analyzing the compositions of the vibration response signals of rotor system during starting process and the cause of beat vibration phenomenon in vibration response signal, one transient vibration response of starting process based identification method for rotor kinetic parameters in time domain is proposed. Here unbalanced vibration response signal during starting process is considered to identify the natural frequency and damping parameters of rotor system instead of sine sweep vibration response signal in frequency domain parameter identification method. The rule of parameter estimation is given and the first？？order natural frequencies and ratios of damping of rotor systems is estimated by both simulated and experimental response signals during starting process. The proposed method for parameter identification only needs the vibration response signals of rotor during the starting process in time domain, so complex exciting equipment is unnecessary
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