Study on extended transfer matrix of pumps

An experimental study was conducted on the transmission characteristics of hydraulic system of centrifugal pumps with a torque parameter included.Some special features of dynamic transmission characteristics were discussed with the emphasis paid on the excitation response to torque,the numerical expression of the transfer matrix and the evaluation of internal disturbance sources.The results show that the applied experimental approach in data processing and the identification mode of transmission coefficient are feasible and applicable.The torque response of pump shaft has a symmetric distribution,similar to that of the hydraulic pressure.The torque and hydraulic parameters have different transferring characters.The relevant transmission coefficients appear to be linear.The analysis on the disturbance sources verified the assertion method of the transmission characteristics.