In order to realize the fault diagnosis of load switch spring operating mechanism

a dynamic simulationmodel of energy storage motor is established to verify the relationship between the current of the motor and the torqueof the operating mechanism

at the same time

the fault simulation test is carried out

which measure and analyzethe change law of the current of the energy storage motor of the load switch operating mechanism

the closing springlatch and the transmission gear cartridge. and compare with the results under normal circumstances

next the influ-ence of the characteristic quantity of the energy storage motor current on the state of the operating mechanism is stud-ied

and the feature quantity is reduced by the Pearson correlation coefficient method. Aiming at the main faults inthe load switch operating mechanism

the decision tree-based support vector machine is used to identify the threestates of the load switch normal state

the transmission gear cassette and the energy storage spring cassette. The faultdiagnosis method of the above load switch was verified by experimental analysis under the support of a number of testdatabases of motor current. and the research results show that the method can effectively extract the fault characteris-tics of the operating mechanism and complete the fault diagnosis of the relevant components of the load switch energystorage operating mechanism.