Circuit frequency characteristic error compensation method of rotor hard bearing dynamic unbalance test

摘要: The invention provides a circuit frequency characteristic error compensation method of rotor hard bearing dynamic unbalance test. Three sinusoidal signals different in are generated by the system, respectively, without increasing or changing any hardware; system identification is performed on third-order low-pass filter link according to output results through and then an actual transfer function fitted, therefore, influence measurement due capacitance value dispersion, resistance change, temperature drift like hardware conditioning eliminated nondestructive realized.