A monitoring method for monitoring equipment of electromechanical actuator type, the equipment including a three-phase electric motor, the monitoring method comprising the following steps: measuring three-phase currents powering the three-phase electric motor; projecting the three-phase currents into a Park reference frame; performing an ensemblist empirical mode decomposition processor the quadrature current coupled with a blind source separation process in order to obtain source components; from among the source components, automatically selecting a first set of source components sensitive to a first defect, and a second set of source components sensitive to a second defect; constructing a first virtual defect signal and a second virtual defect signal; and extracting a first set of signatures representative of the first defect from the first virtual defect signal, and extracting a second set of signatures representative of the second defect from the second virtual defect signal.