The present disclosure provides a single or multi-coupled fault test system and fault diagnosis method for a rotor system. With the modular design, and by setting different rotating conditions and structural forms of the flexible rotor system for simulation on operation states and fault types of the rotor system, the present disclosure can implement the simulation test of the rotor system in different fault conditions and can ensure the accuracy of the test performance in the simulation test. With the establishment of the fault determination models of the rotor system in the different fault conditions, the present disclosure can accurately predict and warn the fault of the rotor system, accurately analyze the fault type, and ensure the operational reliability of the rotor system.

The present disclosure provides a single or multi-coupled fault test system and fault diagnosis method for a rotor system. With the modular design, and by setting different rotating conditions and structural forms of the flexible rotor system for simulation on operation states and fault types of the rotor system, the present disclosure can implement the simulation test of the rotor system in different fault conditions and can ensure the accuracy of the test performance in the simulation test. With the establishment of the fault determination models of the rotor system in the different fault conditions, the present disclosure can accurately predict and warn the fault of the rotor system, accurately analyze the fault type, and ensure the operational reliability of the rotor system.

A test stand includes a base frame and a bearing housing defining a frustoconical recess. A bearing unit has a bearing sleeve defining a through-going bearing bore coaxial with a rotation axis. A bearing shaft is rotatably mounted in the bearing bore. A contour of an outer conical wall of the bearing sleeve is at least partially identical with a contour of the frustoconical recess, where the bearing unit is detachably arranged in contact with the frustoconical recess. A fixing element on the distal end of the bearing shaft is configured for detachably fixing a test object. A test stand drive is arranged on the base frame and has a test shaft configured to be driven in rotation about the rotation axis, where the test shaft is configured to be connected coaxially to the bearing shaft of the bearing unit.

An electric power train includes an electric drive, an electric motor driven by the electric drive, and a meshing pair of a drive gear and a driven gear. The drive gear is coupled to the electric motor and the driven gear is coupled to a mechanical load. The backlash of the meshing pair of the drive gear and the driven gear is measured and estimated based on a time until a contact of teeth of the rotating drive gear and the driven gear during a startup of the electric motor. Wear of the meshing pair of the drive gear and the driven gear based on a change in the measured backlash over time during the operation of the electric power train.

A testing device for an unmanned aerial vehicle where the testing device tests the performance of a tested motor (100). The testing device has a support stand (200), and the tested motor (100) is arranged on the support stand (200). A simulated motor (300) is arranged on the support stand (200), and the simulated motor (300) is coaxially arranged with the tested motor (100) to simulate a load when the tested motor (100) is in operation, thereby allowing a performance test of the tested motor (100).

A testing device for an unmanned aerial vehicle where the testing device tests the performance of a tested motor (100). The testing device has a support stand (200), and the tested motor (100) is arranged on the support stand (200). A simulated motor (300) is arranged on the support stand (200), and the simulated motor (300) is coaxially arranged with the tested motor (100) to simulate a load when the tested motor (100) is in operation, thereby allowing a performance test of the tested motor (100).

A three-dimensional force loading device for a motor spindle is provided, and relates to the field of motor spindle testing. The device including a bottom plate; a torque loading assembly configured for testing torque performance of the motor spindle, and the torque loading assembly is in transmission connection with the motor spindle; a sleeve shell rotatably sleeved on the motor spindle, the sleeve shell is fixed along an axis direction of the motor spindle; a radial force loading assembly configured for testing radial force performance of the motor spindle, and the radial force loading assembly is fixedly connected with the sleeve shell; an axial force loading assembly configured for testing axial force performance of the motor spindle; and a intermediate force transmission mechanism connected with the sleeve shell and the axial force loading assembly.

Aspects of the invention relate to a method comprising: determining an output torque at a wheel of a vehicle mounted to a test apparatus comprising an external motor, the output torque being in response to a command; determining a correction factor based on the output torque and at least one coefficient associated with a reaction of a component of the vehicle and/or of the test apparatus to an applied torque at the vehicle; and controlling the external motor to apply the correction factor to the wheel of the vehicle.

A road simulation test system and method for testing torsional strain input to an axle assembly having an input shaft and a suspension system, including a torque input module configured to apply rotary torque to the axle assembly. The torque input module includes a rotary actuator, a torsional load cell, a drive shaft connection portion, and a controller in communication with the rotary actuator and the torsional load cell, wherein upon receipt of an instruction from the controller, the rotary actuator is configured to rotate the input shaft to apply the rotary torque to the axle assembly, and as the rotary actuator rotates the input shaft, a signal indicative of a torsional load is communicated by the torsional load cell to the controller to monitor the rotary torque applied to the axle assembly.

A road simulation test system and method for testing torsional strain input to an axle assembly having an input shaft and a suspension system, including a torque input module configured to apply rotary torque to the axle assembly. The torque input module includes a rotary actuator, a torsional load cell, a drive shaft connection portion, and a controller in communication with the rotary actuator and the torsional load cell, wherein upon receipt of an instruction from the controller, the rotary actuator is configured to rotate the input shaft to apply the rotary torque to the axle assembly, and as the rotary actuator rotates the input shaft, a signal indicative of a torsional load is communicated by the torsional load cell to the controller to monitor the rotary torque applied to the axle assembly.