Optimal Layout of Rotor-bearing System Sensors Based on Fault Diagnosability

In view of the current situation that there is little research on whether the possible fault signals of the rotor-bearing system can be identified and separated when optimizing the sensor arrangement, the transmission path of the vibration signals in the rotor-bearing system is analyzed, and the rolling bearing vibration signal model is established, and the fault diagnosability is applied to the optimal sensor arrangement of the rotor-bearing system, and the fault diagnosability evaluation criterion is used as an indicator to evaluate different arrangement solutions. The optimal sensor arrangement is finally given. The possible fault signals are measured at these sensor nodes, the fast Fourier transform is performed to obtain the spectrum of the corresponding faults, the density function of the corresponding faults is obtained by using kernel density estimation, and then the K-L scatter is used to determine the fault diagnosability at each location; the optimal solution is determined by using the fault diagnosability as an evaluation index. The feasibility of the proposed method is verified by the rotor bearing fault diagnosis test bench..(Abstract)