Simulation test system for impact and vibration of the gears of a dual-motor gear transmission

Abstract

A simulation test system for impacts and vibrations of the gears of a dual-motor gear train, comprising a first drive unit, a second drive unit, a gear shaft set, a servomotor controller (3), a gear train (6), a load shaft (7), a load dynamometer (9), and a load dynamometer controller (10). The first drive unit and the second drive unit are arranged in parallel, the power output of the first drive unit being connected to a first power input of the gear train (6) via a clutch, the power drive connection of the first drive unit being connected to a first signal output of the servomotor controller (3) via a cable, and the power output of the second drive unit being connected to a second power input of the gear train (6) via a clutch.wherein the power drive connection of the second drive unit is connected via a cable to a second signal output of the servo motor controller (3), wherein the power output of the gear transmission (6) is connected via a coupling to one end of the load shaft (7), wherein the other end of the load shaft (7) is connected via the gear shaft set to the power input shaft of the load dynamometer (9), and wherein the signal input of the load dynamometer (9) is connected via a cable to the signal output of the load dynamometer controller (10), , wherein the first drive unit includes a first drive servomotor (1), a first drive torque sensor (4) and a first center shaft, wherein the first drive servomotor (1) is fastened to the ground via a motor mount, wherein the motor output shaft of the first drive servomotor (1) is detachably connected to one end of the first center shaft, wherein the other end of the first center shaft is connected to the first power input of the gear transmission (6) via a coupling, wherein the first drive torque sensor (4) is arranged on the first center shaft and wherein the first drive torque sensor (4) is fastened to the ground via a support, wherein the second drive unit includes a second drive servomotor (2), a second drive torque sensor (5) and a second center shaft, wherein the second drive servomotor (2) is fastened to the ground via a motor mount, wherein the motor output shaft of the second drive servomotor (2) is detachably connected to one end of the second center shaft, wherein the other end of the second center shaft is connected to the second power input of the gear transmission (6) via a coupling, wherein the second drive torque sensor (5) is arranged on the second center shaft, wherein the second drive torque sensor (5) is fastened to the ground via a support, wherein the transmission shaft set includes a transmission shaft and a load torque sensor (8), wherein one end of the transmission shaft is detachably connected to the other end of the load shaft (7), wherein the other end of the transmission shaft is detachably connected to the power input shaft of the load dynamometer (9), wherein the load torque sensor (8) is arranged on the transmission shaft and wherein the load torque sensor (8) is attached to the ground via a support, wherein a first input shaft unit, a first output shaft unit, a second input shaft unit, a second output shaft unit and an output shaft unit are provided in the gear transmission (6), wherein the first input shaft unit and the second input shaft unit are arranged symmetrically along the axis of the output shaft unit on the two sides of the output shaft unit, wherein the first output shaft unit is arranged between the first input shaft unit and the output shaft unit, wherein the first input shaft unit is connected to the output shaft unit via the first output shaft unit, wherein the second output shaft unit is arranged between the second input shaft unit and the output shaft unit, wherein the second input shaft unit is connected to the output shaft unit via the second output shaft unit,wherein the other end of the first center shaft is connected via a coupling to the first drive shaft unit in the gear transmission (6) and wherein the other end of the second center shaft is connected via a coupling to the second drive shaft unit in the gear transmission (6), , wherein the first drive shaft unit includes a first drive shaft (6-1) and a first drive gear (6-1-1), wherein the first drive gear (6-1-1) is arranged on the first drive shaft (6-1), wherein the first output shaft unit includes a first output shaft (6-2), a first output gear (6-2-1) and a second output gear (6-2-2), wherein the first output gear (6-2-1) and the second output gear (6-2-2) are both arranged on the first output shaft (6-2), wherein the first drive gear (6-1-1) and the first output gear (6-2-1) are in engagement, wherein the output shaft unit includes an output shaft (6-3) and an output gear (6-3-1), wherein the output gear (6-3-1) is arranged on the output shaft (6-3), wherein the second Output gear (6-2-2) is in engagement with the output gear (6-3-1), wherein the second output shaft unit comprises a second output shaft (6-4),a third output gear (6-4-1) and a fourth output gear (6-4-2), wherein the third output gear (6-4-1) and the fourth output gear (6-4-2) are both arranged on the second output shaft (6-4), wherein the fourth output gear (6-4-2) is engaged with the output gear (6-3-1), wherein the second drive shaft unit includes a second drive shaft (6-5) and a second drive gear (6-5-1), wherein the second drive gear (6-5-1) is arranged on the second drive shaft (6-5), wherein the second drive gear (6-5-1) and the third output gear (6-4-1) are engaged, wherein the other end of the first center shaft is connected to the first drive shaft (6-1) via a coupling and wherein the other end of the second center shaft is connected to the second drive shaft via a coupling (6-5) is connected, , wherein the first drive servomotor (1) is in speed mode and the second drive servomotor (2) is in torque mode, wherein during operation of the simulation test system, first the first drive servomotor (1) is started and set to a specific speed, wherein the second drive servomotor (2) and the load dynamometer (9) are driven to run, wherein the gear pair connected to the second drive servomotor (2) is in a negative mesh state and does not output power to the gear train (6) and the load, wherein next the second drive servomotor (2) is started and gradually increases the output torque, during which process the gear pair connected to the second drive servomotor (2) is converted from the negative mesh state to the positive mesh state, thereby generating shocks and vibrations of the gears,wherein the second drive servomotor (2) further increases to the desired torque, wherein the first drive servomotor (1) and the second drive servomotor (2) output the effective power and the shocks and vibrations disappear, wherein the servomotor controller (3) can provide control of the drive torque fluctuation for the second drive servomotor, wherein the load dynamometer controller (10) can provide load torque control for the load dynamometer (9), thereby realizing the control of the input torque fluctuation and the load torque fluctuation of the simulation test system for shocks and vibrations of the gears of a dual-motor gear transmission.

Description

Field of the invention

[0001] The invention relates to the technical field of impacts and vibrations of gears of gear transmissions, in particular to a simulation test system for impacts and vibrations of gears of a dual-motor gear transmission. State of the art

[0002] The dual-motor gear transmission is used to integrate the output power of the two drive sources and transmit it to the drive shaft system to increase the output power of the drive system. Due to the backlash of the gear transmission, when the parallel drive-side gear pair is converted from negative mesh to positive mesh, the gear pair repeatedly generates impacts within the backlash, resulting in severe noise and vibration. After the dual motors are connected in parallel and the working power is input, the impacts and vibrations of the gears disappear. The vibrations of the gear transmission increase the fatigue wear of the gears and easily lead to cracks and tooth breakage, and even damage the drive system, seriously endangering the safety and reliability of the system.

[0003] The simulation test system for the impact and vibration of gears in dual-motor gear transmissions can effectively reproduce the actual impact and vibration of the gears in the transmission. The impact and vibration of the gears in dual-motor gear transmissions are affected by various factors, such as changes in the power of the dual motor, fluctuations in input torque, and fluctuations in the output load torque. Through simulation testing research, the influence rules of the above-mentioned factors on gear impact and vibration can be specified, thereby providing effective technical support for reducing the negative effects of gear impact and vibration.

[0004] Regarding the problem of gear impact and vibration in dual-motor drive transmissions, existing technology lacks a simulation test system. The actual impact and vibration of the gears cannot be reproduced to obtain the influence rules of various factors on gear impact and vibration. Therefore, it is impossible to provide a solution that can effectively prevent gear impact and vibration.

[0005] Conventional simulation test systems for impact and vibration of the gears of a dual-motor gear transmission are disclosed in CN 2 07 114 175 U, CN 1 14 216 675 A, and US 4 159 642 A. CN 2 07 114 175 U discloses a transmission arrangement with two motors connected in parallel, which enables improved power transmission and fault detection. CN 1 14 216 675 A describes a test bench for forward and reverse transmissions, consisting of a drive motor, clutches, torque measuring devices, and gear units, which is used to test the performance of transmission systems. US 4 159 642 A discloses a test device for aircraft transmissions, which enables the performance verification of transmissions by connecting the drive shafts to motors and loading the output shafts with brakes. Object of the invention

[0006] In order to solve the problem of the impact and vibration of the gears of the dual-motor drive transmission in the prior art, the invention provides a simulation test system for impact and vibration of the gears of a dual-motor gear transmission.

[0007] The invention is defined by the appended claim. The following description is subject to this limitation. Any disclosure outside the scope of the claim is intended for illustrative and comparative purposes only.

[0008] According to the invention, a simulation test system for impacts and vibrations of the gears of a dual-motor gear transmission according to claim 1 is provided.

[0009] Furthermore, the first drive unit includes a first drive servomotor, a first drive torque sensor and a first center shaft, wherein the first drive servomotor is fixed to the ground via the motor mount, wherein the motor output shaft of the first drive servomotor is detachably connected to one end of the first center shaft, wherein the other end of the first center shaft is connected to the first power input of the gear transmission via a coupling, wherein the drive torque sensor is arranged on the first center shaft, and wherein the first drive torque sensor is fixed to the ground via a support.

[0010] Furthermore, the second drive unit contains a second drive servo motor, a second drive torque sensor and a second center shaft, wherein the second drive servo motor is fastened to the ground via the motor mount, wherein the motor output shaft of the second drive servo motor is detachably connected to one end of the second center shaft, wherein the other end of the second center shaft is connected to the second power input of the gear transmission via a coupling, wherein the second drive torque sensor is arranged on the second center shaft, wherein the second drive torque sensor is fastened to the ground via a support.

[0011] Furthermore, the gear shaft set includes a gear shaft and a load torque sensor, wherein one end of the gear shaft is detachably connected to the other end of the load shaft, wherein the other end of the gear shaft is detachably connected to the power input shaft in the load dynamometer, wherein the load torque sensor is arranged on the gear shaft, and wherein the load torque sensor is attached to the floor via a support.

[0012] Furthermore, a first input shaft unit, a first output shaft unit, a second input shaft unit, a second output shaft unit and an output shaft unit are provided in the gear transmission, wherein the first input shaft unit and the second input shaft unit are arranged symmetrically along the axis of the output shaft unit on the two sides of the output shaft unit, wherein the first output shaft unit is arranged between the first input shaft unit and the output shaft unit, wherein the first input shaft unit is connected to the output shaft unit via the first output shaft unit, wherein the second output shaft unit is arranged between the second input shaft unit and the output shaft unit, wherein the second input shaft unit is connected to the output shaft unit via the second output shaft unit,wherein the other end of the first center shaft is connected via a coupling to the first drive shaft unit in the gear transmission, and wherein the other end of the second center shaft is connected via a coupling to the second drive shaft unit in the gear transmission.

[0013] Furthermore, the first drive shaft unit includes a first drive shaft and a first drive gear, wherein the first drive gear is arranged on the first drive shaft, wherein the first output shaft unit includes a first output shaft, a first output gear, and a second output gear, wherein the first output gear and the second output gear are both arranged on the first output shaft, wherein the first drive gear and the first output gear are engaged, wherein the output shaft unit includes an output shaft and an output gear, wherein the output gear is arranged on the output shaft, wherein the second output gear is engaged with the output gear, wherein the second output shaft unit includes a second output shaft, a third output gear, and a fourth output gear, wherein the third output gear and the fourth output gear are both arranged on the second output shaft,wherein the fourth output gear is engaged with the output gear, wherein the second drive shaft unit includes a second drive shaft and a second drive gear, wherein the second drive gear is arranged on the second drive shaft, wherein the second drive gear and the third output gear are engaged, wherein the other end of the first center shaft is connected to the first drive shaft via a clutch, and wherein the other end of the second center shaft is connected to the second drive shaft via a clutch.

[0014] Compared with the prior art, the invention has the following advantages: In the simulation test system for gear shock and vibration of a dual-motor gear train of the invention, the first drive servomotor is in speed mode, and the second drive servomotor is in torque mode. During system operation, the first drive servomotor is first started and set to a specific speed, while the second drive servomotor and the load dynamometer are driven to run. At this time, the gear pair connected to the second drive servomotor is in a negative mesh state and does not output power to the gear train and the load. Next, the second drive servomotor is started and gradually increases the output torque. During this process, the gear pair connected to the second drive servomotor is transformed from the negative mesh state to the positive mesh state, generating gear shock and vibration.The second drive motor continues to increase to the desired torque. At this time, the first and second drive motors deliver their effective power, and the shock and vibration disappear. The servo motor controller can provide control of the drive torque fluctuation for the second drive servo motor. The dynamometer controller can provide load torque control for the dynamometer. This enables control of the input torque fluctuation and load torque fluctuation of the simulation test system for the shock and vibration of the gears of a dual-motor gear drive. By determining the input torque and load torque fluctuations, experimenters can offer solutions to effectively avoid the problem of shock and vibration of the gears. Short description of the drawings Fig. 1 a plan view of the invention, Fig. 2 a front view of the invention, Fig. 3 a representation of the toothed gear 6 of the invention. List of reference symbols

[0015] 1 first drive servo motor, 2 second drive servo motor, 3 servo motor controller, 4 first drive torque sensor, 5 second drive torque sensor, 6 gear transmission, 6-1 first drive shaft 6-1-1 first drive gear, 6-2 first output shaft, 6-2-1 first driven gear, 6-2-2 second drive gear, 6-3 output shaft, 6-3-1 output gear, 6-4 second output shaft, 6-4-1 third driven gear, 6-4-2 fourth driven gear, 6-5 second drive shaft, 6-5-1 second drive gear, 7 load shaft, 8 load torque sensor, 9 load dynamometer, 10 load dynamometer controller. Description of the preferred embodiments

[0016] Embodiment 1: This embodiment is described with reference to Fig. 1 to Fig. 3. This embodiment provides a simulation test system for the impact and vibration of the gears of a dual-motor gear train. The simulation test system includes the first drive unit, the second drive unit, the gear shaft set, the servomotor controller 3, the gear train 6, the load shaft 7, the load dynamometer 9, and the load dynamometer controller 10. The first drive unit and the second drive unit are arranged in parallel. The power output of the first drive unit is connected to the first power input of the gear train 6 via a clutch. The power drive terminal of the first drive unit is connected to the first signal output of the servomotor controller 3 via a cable. The power output of the second drive unit is connected to the second power input of the gear train 6 via a clutch.The power drive connection of the second drive unit is connected via a cable to the second signal output of the servo motor controller 3. The power output of the gear transmission 6 is connected to one end of the load shaft 7 via a coupling. The other end of the load shaft 7 is connected via the gear shaft set to the power input shaft of the load dynamometer 9. The signal input of the load dynamometer 9 is connected via a cable to the signal output of the load dynamometer controller 10.

[0017] Embodiment 2: This embodiment is described with reference to Fig. 1 to Fig. 3. The difference between this embodiment and Embodiment 1 is that the first drive unit includes a first drive servomotor 1, a first drive torque sensor 4, and a first center shaft. The first drive servomotor 1 is fixed to the ground via the motor mount. The motor output shaft of the first drive servomotor 1 is detachably connected to one end of the first center shaft. The other end of the first center shaft is connected to the first power input of the gear train 6 via a coupling. The drive torque sensor 4 is arranged on the first center shaft. The first drive torque sensor 4 is fixed to the ground via a support. Other components and connection methods are the same as in Embodiment 1.

[0018] In this embodiment, a connecting sleeve is arranged on the output shaft of the first drive servomotor 1. The end of the connecting sleeve is provided with a flange. A flange plate is provided on the end face of the first center shaft. The output shaft of the first drive servomotor 1 is detachably connected to the first center shaft via the flange plate.

[0019] Embodiment 3: This embodiment is described with reference to Fig. 1 to Fig. 3. The difference between this embodiment and Embodiment 2 is that the second drive unit includes a second drive servomotor 2, a second drive torque sensor 5, and a second center shaft. The second drive servomotor 2 is fixed to the ground via the motor mount. The motor output shaft of the second drive servomotor is detachably connected to one end of the second center shaft. The other end of the second center shaft is connected to the second power input of the gear transmission 6 via a coupling. The second drive torque sensor 5 is arranged on the second center shaft. The second drive torque sensor 5 is fixed to the ground via a support. Other components and connection methods are the same as in Embodiment 2.

[0020] In this embodiment, the connection method of the second drive servo motor 2 and the second center shaft is the same as the connection method of the first drive servo motor and the first center shaft.

[0021] Embodiment 4: This embodiment is described with reference to Fig. 1 to 3. The difference between this embodiment and Embodiment 3 is that the transmission shaft assembly includes a transmission shaft and a load torque sensor 8. One end of the transmission shaft is detachably connected to the other end of the load shaft 7. The other end of the transmission shaft is detachably connected to the power input shaft in the load dynamometer 9. The load torque sensor 8 is arranged on the transmission shaft. The load torque sensor 8 is fixed to the floor via a support. Other components and connection methods are the same as in Embodiment 3.

[0022] In this embodiment, a flange is attached to the end where the load shaft 7 connects to the transmission shaft. Both ends of the drive shaft are each provided with a flange plate. The load shaft 7 is detachably connected to the transmission shaft via the flange plate.

[0023] Embodiment 5: This embodiment is described with reference to Fig. 1 to Fig. 3. The difference between this embodiment and Embodiment 5 is that in the gear transmission 6, a first input shaft unit, a first output shaft unit, a second input shaft unit, a second output shaft unit, and an output shaft unit are provided. The first input shaft unit and the second input shaft unit are arranged symmetrically along the axis of the output shaft unit on the two sides of the output shaft unit. The first output shaft unit is arranged between the first input shaft unit and the output shaft unit. The first input shaft unit is connected to the output shaft unit via the first output shaft unit. The second output shaft unit is arranged between the second input shaft unit and the output shaft unit. The second input shaft unit is connected to the output shaft unit via the second output shaft unit.The other end of the first center shaft is connected to the first drive shaft unit in the gear transmission 6 via a coupling. The other end of the second center shaft is connected to the second drive shaft unit in the gear transmission 6 via a coupling. Other components and connection methods are the same as in Embodiment 4.

[0024] Embodiment 6: This embodiment will be described with reference to Fig. 1 to Fig. 3. The difference between this embodiment and Embodiment 5 is as follows: The first input shaft unit includes a first input shaft 6-1 and a first drive gear 6-1-1, the first drive gear 6-1-1 being arranged on the first input shaft 6-1. The first output shaft unit includes a first output shaft 6-2, a first driven gear 6-2-1, and a second driven gear 6-2-2, the first driven gear 6-2-1 and the second driven gear 6-2-2 both being arranged on the first output shaft 6-2. The first drive gear 6-1-1 and the first driven gear 6-2-1 are in mesh. The output shaft unit includes an output shaft 6-3 and an output gear 6-3-1. The output gear 6-3-1 is arranged on the output shaft 6-3. The second driven gear 6-2-2 meshes with the output gear 6-3-1.The second output shaft unit 2 includes a second output shaft 6-4, a third output gear 6-4-1, and a fourth output gear 6-4-2. The third output gear 6-4-1 and the fourth output gear 6-4-2 are both arranged on the second output shaft 6-4. The fourth output gear 6-4-2 meshes with the output gear 6-3-1. The second input shaft unit includes a second input shaft 6-5 and a second input gear 6-5-1. The second input gear 6-5-1 is arranged on the second input shaft 6-5. The second input gear 6-5-1 and the third output gear 6-4-1 mesh. The other end of the first center shaft is connected to the first input shaft 6-1 via a clutch. The other end of the second center shaft is connected to the second drive shaft 6-5 via a coupling. Other components and connection methods are the same as in Embodiment 5.

[0025] The present invention has been described above based on preferred embodiments. However, this is not intended to limit the present invention. Anyone skilled in the art can make minor changes or modifications to equivalent embodiments using the above-disclosed structure and technical content without departing from the scope of the technical solution of the present invention. However, all simple modifications, equivalent changes, and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention. Working principle

[0026] Fig. 1 to Fig. 3 present the working principle of the simulation test system for impact and vibration of the gears of a dual-motor gear transmission.

[0027] First, the components are Fig. 1 and Fig. 2 to form a simulation test system for the impact and vibration of the gears of a dual-motor gear transmission. The servo motor controller 3 is used to set the working mode of the first drive servo motor 1 to the speed mode and the working mode of the second drive servo motor to the torque mode. The load dynamometer controller 10 sets the working mode of the load dynamometer 9 to the torque mode.

[0028] Subsequently, the first drive servomotor 1 is started and set to a specific speed. The second drive servomotor 2 is started and set to a specific torque. During this test, the simulation test system for the impact and vibration of the gears of a dual-motor gear train operates normally. Since the second drive servomotor has no specified torque, the gear pair formed by the second drive gear 6-5-1 on the second input shaft 6-5 and the third driven gear 6-4-1 on the second input shaft 6-4 is in a negative mesh state. The gear pair formed by the fourth driven gear 6-4-2 on the second output shaft 6-4 and the output gear 6-3-1 on the output shaft 6-3 is also in a negative mesh state. The second drive servomotor 2 is in the driven state. It does not output any useful power to the gear train.

[0029] Furthermore, the servo motor controller 3 controls the second drive servo motor 2 to gradually increase the torque. The gear pair formed by the second drive gear 6-5-1 on the second input shaft 6-5 and the third driven gear 6-4-1 on the second input shaft 6-4, and the gear pair formed by the fourth driven gear 6-4-2 on the second output shaft 6-4 and the output gear 6-3-1 on the output shaft 6-3 are gradually converted from the negative mesh state to the positive mesh state. The second drive servo motor 2 gradually outputs power to the gear train. This completes the parallel connection of the second drive servo motor. This process causes the gears to generate shock and vibration.

[0030] Furthermore, the servo motor controller 3 can generate a control signal for the sinusoidal torque fluctuation. This signal enables the second drive servo motor 2 to output a sinusoidally fluctuating torque. The second drive torque sensor 5 can detect the actual torque fluctuation signal that the second drive servo motor 2 actually inputs to the gear train 6. It is possible to experimentally investigate the influence of drive torque fluctuations on the impact and vibration of the gears of a dual-motor gear train.

[0031] Finally, the load dynamometer controller 10 can generate a control signal for sinusoidal torque fluctuation. This signal enables the load dynamometer 9 to output a sinusoidally fluctuating torque. The load torque sensor 8 can detect the actual torque fluctuation signal output by the load dynamometer 9. It is possible to experimentally investigate the influence of load torque fluctuations on the impact and vibration of the gears of a dual-motor gear transmission.

Claims

[1] A simulation test system for impacts and vibrations of the gears of a dual-motor gear train, comprising a first drive unit, a second drive unit, a gear shaft set, a servomotor controller (3), a gear train (6), a load shaft (7), a load dynamometer (9), and a load dynamometer controller (10), wherein the first drive unit and the second drive unit are arranged in parallel, wherein the power output of the first drive unit is connected via a clutch to a first power input of the gear train (6), wherein the power drive connection of the first drive unit is connected via a cable to a first signal output of the servomotor controller (3), wherein the power output of the second drive unit is connected via a clutch to a second power input of the gear train (6),wherein the power drive connection of the second drive unit is connected via a cable to a second signal output of the servo motor controller (3), wherein the power output of the gear transmission (6) is connected via a coupling to one end of the load shaft (7), wherein the other end of the load shaft (7) is connected via the gear shaft set to the power input shaft of the load dynamometer (9), and wherein the signal input of the load dynamometer (9) is connected via a cable to the signal output of the load dynamometer controller (10), wherein the first drive unit includes a first drive servomotor (1), a first drive torque sensor (4) and a first center shaft, wherein the first drive servomotor (1) is fastened to the ground via a motor mount, wherein the motor output shaft of the first drive servomotor (1) is detachably connected to one end of the first center shaft, wherein the other end of the first center shaft is connected to the first power input of the gear transmission (6) via a coupling, wherein the first drive torque sensor (4) is arranged on the first center shaft and wherein the first drive torque sensor (4) is fastened to the ground via a support, wherein the second drive unit includes a second drive servomotor (2), a second drive torque sensor (5) and a second center shaft, wherein the second drive servomotor (2) is fastened to the ground via a motor mount, wherein the motor output shaft of the second drive servomotor (2) is detachably connected to one end of the second center shaft, wherein the other end of the second center shaft is connected to the second power input of the gear transmission (6) via a coupling, wherein the second drive torque sensor (5) is arranged on the second center shaft, wherein the second drive torque sensor (5) is fastened to the ground via a support, wherein the transmission shaft set includes a transmission shaft and a load torque sensor (8), wherein one end of the transmission shaft is detachably connected to the other end of the load shaft (7), wherein the other end of the transmission shaft is detachably connected to the power input shaft of the load dynamometer (9), wherein the load torque sensor (8) is arranged on the transmission shaft and wherein the load torque sensor (8) is attached to the ground via a support, wherein a first input shaft unit, a first output shaft unit, a second input shaft unit, a second output shaft unit and an output shaft unit are provided in the gear transmission (6), wherein the first input shaft unit and the second input shaft unit are arranged symmetrically along the axis of the output shaft unit on the two sides of the output shaft unit, wherein the first output shaft unit is arranged between the first input shaft unit and the output shaft unit, wherein the first input shaft unit is connected to the output shaft unit via the first output shaft unit, wherein the second output shaft unit is arranged between the second input shaft unit and the output shaft unit, wherein the second input shaft unit is connected to the output shaft unit via the second output shaft unit,wherein the other end of the first center shaft is connected via a coupling to the first drive shaft unit in the gear transmission (6) and wherein the other end of the second center shaft is connected via a coupling to the second drive shaft unit in the gear transmission (6), wherein the first drive shaft unit includes a first drive shaft (6-1) and a first drive gear (6-1-1), wherein the first drive gear (6-1-1) is arranged on the first drive shaft (6-1), wherein the first output shaft unit includes a first output shaft (6-2), a first output gear (6-2-1) and a second output gear (6-2-2), wherein the first output gear (6-2-1) and the second output gear (6-2-2) are both arranged on the first output shaft (6-2), wherein the first drive gear (6-1-1) and the first output gear (6-2-1) are in engagement, wherein the output shaft unit includes an output shaft (6-3) and an output gear (6-3-1), wherein the output gear (6-3-1) is arranged on the output shaft (6-3), wherein the second Output gear (6-2-2) is in engagement with the output gear (6-3-1), wherein the second output shaft unit comprises a second output shaft (6-4),a third output gear (6-4-1) and a fourth output gear (6-4-2), wherein the third output gear (6-4-1) and the fourth output gear (6-4-2) are both arranged on the second output shaft (6-4), wherein the fourth output gear (6-4-2) is engaged with the output gear (6-3-1), wherein the second drive shaft unit includes a second drive shaft (6-5) and a second drive gear (6-5-1), wherein the second drive gear (6-5-1) is arranged on the second drive shaft (6-5), wherein the second drive gear (6-5-1) and the third output gear (6-4-1) are engaged, wherein the other end of the first center shaft is connected to the first drive shaft (6-1) via a coupling and wherein the other end of the second center shaft is connected to the second drive shaft via a coupling (6-5) is connected, wherein the first drive servomotor (1) is in speed mode and the second drive servomotor (2) is in torque mode, wherein during operation of the simulation test system, first the first drive servomotor (1) is started and set to a specific speed, wherein the second drive servomotor (2) and the load dynamometer (9) are driven to run, wherein the gear pair connected to the second drive servomotor (2) is in a negative mesh state and does not output power to the gear train (6) and the load, wherein next the second drive servomotor (2) is started and gradually increases the output torque, during which process the gear pair connected to the second drive servomotor (2) is converted from the negative mesh state to the positive mesh state, thereby generating shocks and vibrations of the gears,wherein the second drive servomotor (2) further increases to the desired torque, wherein the first drive servomotor (1) and the second drive servomotor (2) output the effective power and the shocks and vibrations disappear, wherein the servomotor controller (3) can provide control of the drive torque fluctuation for the second drive servomotor, wherein the load dynamometer controller (10) can provide load torque control for the load dynamometer (9), thereby realizing the control of the input torque fluctuation and the load torque fluctuation of the simulation test system for shocks and vibrations of the gears of a dual-motor gear transmission.

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