1. A load simulation method of a dual-output-shaft electric drive system is applied to a load simulation device, wherein the load simulation device comprises a tested electric drive system and a loading system, and the method comprises the following steps:

acquiring load simulation parameters; the load simulation parameters comprise moment load spectrum curve parameters and tested electric drive system speed control instructions;

controlling the tested electric drive system and the loading system to perform torque closed-loop operation according to the load simulation parameters;

the tested motor driving system comprises a tested motor controller, a tested motor and a tested motor driver connected between the tested motor controller and the tested motor; the loading system comprises an upper computer and at least two loading subsystems, the upper computer is respectively connected with the at least two loading subsystems and the tested electric driving system, and the at least two loading subsystems are respectively connected with two output shafts of the tested electric machine.

2. The load simulation method of a dual output shaft electric drive system of claim 1, wherein the loading subsystem comprises a loading controller, a loading motor driver, a loading motor, a resolver, an elastic coupling, a rotational speed torque sensor, and a rigid coupling;

the device comprises a rigid coupler, a loading motor driver, an elastic coupler, a loading motor, a rigid coupler and a loading motor, wherein one end of the rigid coupler is connected with an output shaft of a tested motor, the other end of the rigid coupler is connected with the rotating speed and torque sensor, the rotating speed and torque sensor is connected with the loading controller and the elastic coupler respectively, the loading controller is connected with one end of the loading motor through the loading motor driver and controls the loading motor to run, and the other end of the loading motor is connected with the elastic coupler.

3. The method of claim 2, wherein a resolver is further provided between the loading controller and the loading motor, the resolver being configured to detect a rotor position of the loading motor.

4. The method of claim 3, wherein the speed and torque sensor of each of the loading subsystems is coupled to a loading controller of another of the loading subsystems.

5. The method of claim 4, wherein the rigid coupling is connected to the output shaft of the electric machine under test by a spline.

6. The method of claim 4, wherein the obtaining load simulation parameters comprises:

the loading controller receives a torque instruction; the moment instruction is an instruction sent by the upper computer according to the moment load spectrum curve parameter;

the tested motor controller receives a speed instruction; and the speed command is sent by the upper computer according to the speed control command of the tested electric drive system.

7. The method of claim 6, wherein controlling the electric drive system under test and the loading system to perform torque closed-loop operation according to the load simulation parameters comprises:

the tested motor controller controls the tested motor to run according to the speed instruction through the tested motor driver;

the loading controller detects the rotating speed and the torque of the tested motor through the rotating speed torque sensor, performs weighted summation on signals of the rotating speed torque sensors in the at least two loading subsystems, and sends the rotating speed and the torque of the tested motor to the upper computer;

and the loading controller performs torque closed-loop control according to the torque instruction, the rotor position of the loading motor and the torque measured value of the tested motor.

8. The method of claim 7, wherein the load controller performs torque closed loop control based on the torque command, the rotor position of the load motor, and the torque measurement of the tested motor, comprising:

and the loading controller controls the loading motor to apply load torque to the tested motor according to the moment load spectrum curve parameters through the loading motor driver.

Background

With the development of electric drive technology, multi-electric or all-electric aircraft technology has become the mainstream power of the aircraft, and the electromechanical system of the aircraft adopts an electric drive system to replace the existing hydraulic drive system. For example, the thrust reverser systems of large aircraft are beginning to replace the hydraulic thrust reverser systems that are currently in widespread use with electrical thrust reverser systems. Specifically, the electric reverse thrust actuation system is composed of an electric drive system and an actuation system, and the actuation system is divided into a left mobile housing actuation subsystem and a right mobile housing actuation subsystem. When the electric reverse propulsion system is unfolded, the double output shafts of the electric driving system respectively drive the left moving outer cover actuating subsystem and the right moving outer cover actuating subsystem to synchronously extend out, the electric driving system is a key component of the electric reverse propulsion system, and the performance quality of the electric reverse propulsion system is determined by the characteristics of the electric reverse propulsion system. In order to verify the performance of an electric drive system, a corresponding verification platform is required.

At present, an electric reverse pushing actuating system is adopted in the relative technology to perform an electric drive system test, namely the electric drive system drags real products of a left moving outer cover actuating subsystem and a right moving outer cover actuating subsystem to perform the test. The method has the defects of complex test system, large occupied space, high cost and incapability of accurately controlling the load.

Disclosure of Invention

In order to solve the problems, the application provides a load simulation method of a double-output-shaft electric drive system.

The application provides a load simulation method of a double-output-shaft electric drive system, which is applied to a load simulation device, wherein the load simulation device comprises a tested electric drive system and a loading system, and the method comprises the following steps:

acquiring load simulation parameters; the load simulation parameters comprise moment load spectrum curve parameters and tested electric drive system speed control instructions;

controlling the tested electric drive system and the loading system to perform torque closed-loop operation according to the load simulation parameters;

the tested motor driving system comprises a tested motor controller, a tested motor and a tested motor driver connected between the tested motor controller and the tested motor; the loading system comprises an upper computer and at least two loading subsystems, the upper computer is respectively connected with the at least two loading subsystems and the tested electric driving system, and the at least two loading subsystems are respectively connected with two output shafts of the tested electric machine.

Preferably, the loading subsystem comprises a loading controller, a loading motor driver, a loading motor, a rotary transformer, an elastic coupling, a rotating speed and torque sensor and a rigid coupling;

the device comprises a rigid coupler, a loading motor driver, an elastic coupler, a loading motor, a rigid coupler and a loading motor, wherein one end of the rigid coupler is connected with an output shaft of a tested motor, the other end of the rigid coupler is connected with the rotating speed and torque sensor, the rotating speed and torque sensor is connected with the loading controller and the elastic coupler respectively, the loading controller is connected with one end of the loading motor through the loading motor driver and controls the loading motor to run, and the other end of the loading motor is connected with the elastic coupler.

Preferably, a rotary transformer is further arranged between the loading controller and the loading motor, and the rotary transformer is used for detecting the rotor position of the loading motor.

Preferably, the rotating speed and torque sensor of each loading subsystem is connected with the loading controller of the other loading subsystem;

preferably, the rigid coupling is connected with the output shaft of the tested motor through a spline.

Preferably, the loading controller receives a torque command; the moment instruction is an instruction sent by the upper computer according to the moment load spectrum curve parameter;

the tested motor controller receives a speed instruction; and the speed command is sent by the upper computer according to the speed control command of the tested electric drive system.

Preferably, the tested motor controller controls the tested motor to operate according to the speed instruction through the tested motor driver;

the loading controller detects the rotating speed and the torque of the tested motor through the rotating speed torque sensor, performs weighted summation on signals of the rotating speed torque sensors in the at least two loading subsystems, and sends the rotating speed and the torque of the tested motor to the upper computer;

and the loading controller performs torque closed-loop control according to the torque instruction, the rotor position of the loading motor and the torque measured value of the tested motor.

Preferably, the loading controller controls the loading motor to apply a load torque to the tested motor according to the moment-load spectrum curve parameter through the loading motor driver.

In summary, the present application has the following beneficial effects: the load moment with any size can be accurately applied according to the requirement, and simultaneously the moment load under the working condition that the loads of the double output shafts of the electric drive system are inconsistent can be simulated.

Drawings

Fig. 1 is a schematic structural diagram of a load simulator of an electric drive system with dual output shafts according to an embodiment of the present application;

fig. 2 is a schematic view of a loading control principle provided in an embodiment of the present application.

Wherein: the device comprises a test motor, a test motor controller, a test motor driver, a test motor, a rigid coupler, a rotating speed torque sensor, a flexible coupler, a loading motor driver, a rotating transformer and a loading controller, wherein the test motor is 1-an upper computer, the test motor controller is 2-a test motor controller, the test motor driver is 3-a test motor driver, the test motor is 4-a test motor, the rigid coupler is 5-a rotating speed torque sensor, the elastic coupler is 7-an elastic coupler, the loading motor driver is 9-a loading motor driver, the rotating transformer is 10-a loading controller is 11-a loading controller.

Detailed Description

An embodiment of the present application provides a load simulation method for an electric drive system with dual output shafts, which is applied to a load simulation device, and please refer to fig. 1, where the load simulation device includes an electric drive system to be tested and a loading system.

Step 101, a load simulation device obtains load simulation parameters.

The load simulation parameters comprise moment load spectrum curve parameters and tested electric drive system speed control instructions.

In the embodiment of the present application, the load simulation parameter may be a parameter set on the upper computer 1.

And 102, controlling the tested electric drive system and the loading system to perform moment closed-loop operation by the load simulation device according to the load simulation parameters.

The tested motor driving system comprises a tested motor controller, a tested motor and a tested motor driver connected between the tested motor controller and the tested motor; the loading system comprises an upper computer and at least two loading subsystems, the upper computer is respectively connected with the at least two loading subsystems and the tested electric driving system, and the at least two loading subsystems are respectively connected with two output shafts of the tested electric machine.

In the embodiment of the present application, two loading subsystems are taken as an example for explanation, and the two loading subsystems are identical.

The tested motor driving system comprises a tested motor controller 2, a tested motor driver 3 and a tested motor 4, wherein the tested motor driver 3 is connected between the tested motor controller 2 and the tested motor 4. The tested motor 4 comprises two output shafts which are respectively connected with a loading system.

Further, the loading system comprises an upper computer 1 and two loading subsystems, the upper computer 1 is connected with the two loading subsystems respectively, and the two loading subsystems are connected with two output shafts of the tested motor 4 respectively. Each loading subsystem comprises a loading controller 11, a loading motor driver 9, a loading motor 8, a rotary transformer 10, an elastic coupling 7, a rotating speed and torque sensor 6 and a rigid coupling 5.

The loading controller 11 is respectively connected with the loading motor driver 9, the rotary transformer 10 and the rotating speed and torque sensor 6, the loading motor driver 9 is connected between the loading controller 11 and the loading motor 8, the rotary transformer 10 is connected between the loading controller 2 and the loading motor 8, the elastic coupling 7 is connected between the loading motor 8 and the rotating speed and torque sensor 6, and the rigid coupling 5 is connected between the rotating speed and torque sensor 6 and the tested motor 4. And the rotational speed torque sensor 6 of one of the two loading subsystems is connected with the loading controller 11 of the other loading subsystem. The rigid coupling 5 is connected to an output shaft of the motor under test 4 by a spline.

Referring to fig. 2, in the schematic loading control diagram according to the embodiment of the present invention, a moment load spectrum curve parameter is set on the upper computer 1, and the upper computer 1 transmits a moment instruction to the loading controller 11 according to the moment load spectrum curve; the upper computer 1 transmits a speed instruction to the tested motor controller 2 according to the set speed control instruction of the electric drive system; the tested motor controller 2 controls the tested motor 4 to operate according to the speed instruction through the tested motor driver 3; the loading controller 11 detects the rotating speed and the torque of the tested motor 4 through the rotating speed torque sensor 6, performs weighted integration on signals of the rotating speed torque sensors 6 in the two loading subsystems, and simultaneously conveys the rotating speed and the torque of the tested motor 4 to the upper computer 1. The loading controller 11 detects the rotor position of the loading motor 8 through the rotary transformer 10; the loading controller 11 integrates the torque command, the rotor position of the loading motor 8 and the torque measured value of the tested motor 4 to carry out torque closed-loop control, and controls the loading motor 8 to apply load torque to the tested motor 4 according to a torque load spectrum curve through the loading motor driver 9.

The load simulation method of the double-output-shaft electric drive system can realize load simulation of the double output shafts of the electric drive system, can accurately apply load torque of any size according to needs, and can simulate the torque load of the double output shafts of the electric drive system under the working condition of inconsistent load. The load simulation device provided by the application has the advantages of simple structure, low cost, adjustable loading torque range and high precision, and is easy to apply to engineering.