Servo motor accelerated life test system and servo motor accelerated life test method

Abstract

The application relates to a servo motor accelerated life test system and a servo motor accelerated life test method. The method comprises a test unit, a control unit and a unit to be tested. The test unit comprises a load torque assembly, a radial force assembly and a temperature assembly. The unit to be tested comprises at least one motor to be tested. The control unit comprises a controller and a driving motor. The load torque assembly and the radial force assembly are connected with the unit to be tested. The controller is connected with the load torque assembly and the driving motor respectively. The driving motor is connected with the radial force assembly. Multiple test stresses are provided for multiple groups of motors to be tested at the same time, and the accuracy and test efficiency of the life test on the motors to be tested are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment, in particular to a servo motor accelerated life test system and a servo motor accelerated life test method. BACKGROUND

[0002] The servo motor is a key core component applied more in the field of equipment, especially in robots, and the life of the servo motor has an important influence on the reliability level of the equipment, so it is necessary to accurately predict the life of the servo motor.

[0003] In the traditional technology, the life of the servo motor is usually predicted by accelerated life test, the test time is shortened by increasing the load stress, so as to achieve the purpose of accelerated test, and then the life information obtained under the stress level after acceleration is converted to obtain the life estimation under the normal stress level of the product.

[0004] However, the conventional life test method has the problem of low test result accuracy caused by single sensitive stress. SUMMARY

[0005] Therefore, it is necessary to provide a servo motor accelerated life test system and a servo motor accelerated life test method capable of improving the comprehensiveness of testing the servo motor in view of the above technical problems.

[0006] In a first aspect, the present application provides a servo motor accelerated life test system, characterized in that the system comprises a test unit, a control unit and a unit to be tested; the test unit comprises a load torque assembly, a radial force assembly and a temperature assembly; the unit to be tested comprises at least one motor to be tested; the control unit comprises a controller and a drive motor; the load torque assembly and the radial force assembly are connected with the unit to be tested; the controller is connected with the load torque assembly and the drive motor respectively; and the drive motor is connected with the radial force assembly.

[0007] The load torque assembly is configured to apply a load torque stress to the motor to be tested.

[0008] The radial force assembly is configured to apply a radial force to the motor to be tested.

[0009] The temperature assembly is configured to provide a temperature environment with a preset temperature to the motor to be tested.

[0010] The controller is configured to control the drive motor to drive the radial force assembly and control the load torque assembly to provide the load torque stress when testing the unit to be tested.

[0011] In one of the embodiments, the system further comprises a force sensor, the at least one motor under test comprises a first motor under test and a second motor under test, one end of the second motor under test is connected with the radial force assembly, and the other end of the second motor under test is connected with the first motor under test; the force sensor is connected with the second motor under test;

[0012] The driving motor drives the radial force assembly to drive the second motor under test to move to a target position.

[0013] The force sensor is used to detect the force of the second motor under test on the radial force assembly and send the force to the controller.

[0014] In one of the embodiments, the radial force assembly comprises a gear box and a lead screw, the driving motor is connected with one end of the gear box, one end of the lead screw is connected with the other end of the gear box, and the other end of the lead screw is connected with one end of the second motor under test.

[0015] The driving motor connected with the gear box realizes torque output to drive the lead screw to move, so that the second motor under test moves to a target position.

[0016] In one of the embodiments, the radial force assembly further comprises a moving slider, the moving slider and the lead screw are connected through a support, and the moving slider is connected with one end of the second motor under test.

[0017] In one of the embodiments, the system further comprises a vibration sensor and a current sensor, the at least one motor under test comprises a first motor under test and a second motor under test, and the load torque assembly comprises an inertia disc.

[0018] The first inertia disc in the inertia disc is arranged on the first motor under test, and the second inertia disc in the inertia disc is arranged on the second motor under test.

[0019] The vibration sensor sends the vibration signals of the first motor under test and the second motor under test to the controller, and the current sensor sends the current signals of the first motor under test and the second motor under test to the controller, so that the controller predicts the life information of the motor under test according to the vibration signals and the current signals, and terminates the life test when the vibration signals or the current signals are abnormal.

[0020] In one of the embodiments, the temperature assembly comprises a temperature environment box, the load torque assembly and the radial force assembly are arranged in the temperature environment box, and the control unit is arranged outside the temperature environment box.

[0021] In an embodiment, the system further comprises: a linear guide table, a fixed slider; the linear guide table is fixed in the temperature assembly;

[0022] The first motor to be tested is installed on the linear guide table through the fixed slider;

[0023] The second motor to be tested is installed on the linear guide table through a moving slider.

[0024] In an embodiment, the system further comprises: a synchronous belt, the first motor to be tested and the second motor to be tested are connected through the synchronous belt.

[0025] In an embodiment, the load torque assembly further comprises: a first driver and a second driver;

[0026] The first driver is connected with the first motor to be tested, for sending a driving signal to the first motor to be tested;

[0027] The second driver is connected with the second motor to be tested, for sending a driving signal to the second motor to be tested.

[0028] In a second aspect, the application further provides a method for accelerated life testing of a servo motor, the method is applied to a controller in the accelerated life testing system of the servo motor as described in the first method, and the method comprises:

[0029] According to a preset life testing strategy, a control signal is sent to a driving motor, a first driver and a second driver in the accelerated life testing system of the servo motor, so as to provide a radial force and a load torque to the motor to be tested;

[0030] A monitoring signal sent by a sensor in the life testing system is received;

[0031] According to the monitoring signal and a preset prediction logic, life information of the motor to be tested is obtained.

[0032] The servo motor acceleration life test system and the servo motor acceleration life test method, the system comprises: a test unit, a control unit and a unit to be tested; the test unit comprises a load torque assembly, a radial force assembly and a temperature assembly; the unit to be tested comprises at least one motor to be tested; the control unit comprises a controller and a driving motor; the load torque assembly and the radial force assembly are connected with the unit to be tested; the controller is connected with the load torque assembly and the driving motor respectively; the driving motor is connected with the radial force assembly; the load torque assembly is used for applying load torque stress to the motor to be tested; the radial force assembly is used for applying radial force to the motor to be tested; the temperature assembly is used for providing a temperature environment with a preset temperature to the motor to be tested; the controller is used for controlling the driving motor to drive the radial force assembly and controlling the load torque assembly to provide load torque stress when testing the unit to be tested. By setting the load torque assembly, the radial force assembly and the temperature assembly in the system, multiple test stresses are provided for multiple groups of motors to be tested at the same time, and the accuracy and test efficiency of the life test of the motor to be tested are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The structural block diagram of the servo motor acceleration life test system in one embodiment;

[0035] Figure 2 The structural block diagram of the servo motor acceleration life test system in another embodiment;

[0036] Figure 3 The structural block diagram of the servo motor acceleration life test system in another embodiment;

[0037] Figure 4 The structural block diagram of the servo motor acceleration life test system in another embodiment;

[0038] Figure 5 The flowchart of the servo motor acceleration life test method in one embodiment;

[0039] Explanation of reference signs:

[0040] Test unit: 01; Control unit: 02; Unit to be tested: 03;

[0041] Load torque assembly: 10; Radial force assembly: 20; Temperature assembly: 30;

[0042] Motor to be tested: 40; Controller: 50; Driving motor: 60;

[0043] Synchronous belt: 70; Force sensor: 80; Moving slider: 201;

[0044] Gearbox: 202; Lead screw: 203; Inertia disc: 101;

[0045] Vibration sensor: 90; Current sensor: 100; Temperature environment box: 301;

[0046] First motor to be tested: 401; Second motor to be tested: 402; Fixed slider: 204;

[0047] First driver: 102; Second driver: 103. DETAILED DESCRIPTION

[0048] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used herein are intended to cover a non-exclusive inclusion.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0051] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] Servo motor is a key core component which is widely used in equipment field, especially in robots. The life of servo motor has an important influence on the reliability level of equipment. The traditional servo motor life test method needs to spend a lot of time and money under the load condition corresponding to the use environment. In order to overcome the shortcomings of high time cost of traditional life test, accelerated life test technology emerges as the times require. Accelerated life test can shorten the test time by increasing the load stress without changing the failure mechanism of the product, so as to achieve the purpose of accelerating the test, and then convert the life information obtained under the stress level after acceleration to obtain the life estimation under the normal stress level of the product. At present, there are many methods and devices for testing the accelerated life of servo motor, but most of them are loaded inertia disc to simulate load load for measurement. This kind of test equipment is mainly based on the principle of fatigue cumulative damage, and the sensitive stress of the tested motor is limited to the load torque, without considering the influence of temperature and radial force on the life of the tested motor. Therefore, the traditional servo motor accelerated life test system has the problem of low test result accuracy caused by single sensitive stress.

[0053] In one embodiment, as shown in Figure 1 An accelerated life test system of servo motor is provided, which comprises a test unit 01, a control unit 02 and a unit to be tested 03; the test unit 01 comprises a load torque assembly 10, a radial force assembly 20 and a temperature assembly 30; the unit to be tested 03 comprises at least one motor to be tested 40; the control unit 02 comprises a controller 50 and a driving motor 60; the load torque assembly 10 and the radial force assembly 20 are connected with the unit to be tested 03; the controller 50 is connected with the load torque assembly 10 and the driving motor 60 respectively; the driving motor 60 is connected with the radial force assembly 20 respectively; the load torque assembly 10 is used for applying load torque to the motor to be tested 40; the radial force assembly 20 is used for applying radial force to the motor to be tested 40; the temperature assembly 30 is used for providing a temperature environment with a preset temperature to the motor to be tested 40; the controller 50 is used for controlling the driving motor 60 to drive the radial force assembly 20 and controlling the load torque assembly 10 to provide load torque when testing the unit to be tested 03.

[0054] Wherein, the load torque refers to the torque generated by the mechanical system or device when subjected to external load; the radial force is a force acting in a specific direction on a cylindrical or spherical object.

[0055] In the embodiments of the present application, the test unit 01 is used to provide a test environment for the unit to be tested 03, wherein the test environment comprises a torque environment, a radial force environment and a temperature environment; the control unit 02 is used to send control instructions to the test unit 01 according to a preset test strategy, and receive test data returned by the test unit 01; the unit to be tested 03 can comprise one or more motors to be tested 40.

[0056] Optionally, the load torque assembly 10 in the test unit 01 is used to apply load torque stress to the motor to be tested 40 based on the control signal of the controller 50; the radial force assembly 20 in the test unit 01 is used to apply radial force to the motor to be tested 40 based on the driving signal transmitted by the driving motor.

[0057] Optionally, when the test unit 01 includes multiple motors to be tested 40, each motor to be tested 40 is a motor of the same structure. It should be noted that when testing the service life of the servo motor, test data of a predetermined time length needs to be collected, and the collected data is analyzed to obtain the acceleration life test result of the servo motor. Two or more servo motors can be provided with the same test environment at the same time, and the test data of all servo motors is collected at the same time, which reduces the collection time of test data compared with collecting data of one servo motor.

[0058] Optionally, the temperature assembly 30 can include a temperature test box, which provides a temperature environment of a predetermined temperature for the above-mentioned acceleration life test system of the servo motor by changing the corresponding temperature of the temperature test box. Optionally, the temperature assembly can be controlled by the controller, or it can be manually adjusted to control the temperature assembly. Optionally, other units and assemblies in the acceleration life test system of the servo motor except the temperature test box can be arranged in the temperature test box.

[0059] In the above-mentioned acceleration life test system of the servo motor, the system includes a test unit, a control unit and a test unit; the test unit includes a load torque assembly, a radial force assembly and a temperature assembly; the test unit includes at least one motor to be tested; the control unit includes a controller and a driving motor; the load torque assembly and the radial force assembly are connected with the test unit; the controller is connected with the load torque assembly and the driving motor respectively; the driving motor is connected with the radial force assembly; the load torque assembly is used to apply load torque stress to the motor to be tested; the radial force assembly is used to apply radial force to the motor to be tested; the temperature assembly is used to provide a temperature environment of a predetermined temperature for the motor to be tested; the controller is used to control the driving motor to drive the radial force assembly and control the load torque assembly to provide load torque stress when testing the test unit. By arranging the load torque assembly, the radial force assembly and the temperature assembly in the system, multiple test stresses are provided for multiple groups of motors to be tested at the same time, which improves the accuracy and test efficiency of the life test of the motor to be tested.

[0060] In one embodiment, as Figure 2As shown, the system further comprises a force sensor 80, the at least one motor to be tested 40 comprises a first motor to be tested 401 and a second motor to be tested 402, one end of the second motor to be tested 402 is connected with the radial force assembly 20; the other end of the second motor to be tested 402 is connected with the first motor to be tested 401; the force sensor 80 is connected with the second motor to be tested 402; the driving motor 60 drives the radial force assembly 20 to drive, so that the second motor to be tested 402 moves to the target position; the force sensor 80 is used for detecting the force of the second motor to be tested 402 on the radial force assembly 20, and sending the force to the controller 50.

[0061] In the embodiment of the present application, the radial force assembly 20 is used for receiving the driving signal of the driving motor 60, so as to drive based on the driving signal, and drive the second motor to be tested 402 connected with the radial force assembly 20 to move, so that the radial forces applied on the first motor to be tested 401 and the second motor to be tested 402 are the same. Further, the force sensor 80 is connected with the second motor to be tested 402, when the second motor to be tested 402 moves to the target position corresponding to the second motor to be tested 402, the force sensor 80 detects the force of the second motor to be tested 402 on the screw rod 203, and sends the second force to the controller 50.

[0062] Optionally, the force sensor 80 can be used to connect with the second motor to be tested 402, and detect the force between the first motor to be tested 401 and the second motor to be tested 402.

[0063] Optionally, as shown in Figure 2 As shown, the radial force assembly 20 comprises a gear box 202 and a screw rod 203; one end of the driving motor 60 is connected with the gear box 202, one end of the screw rod 203 is connected with the other end of the gear box 202; the other end of the screw rod 203 is connected with one end of the second motor to be tested 402; the driving motor 60 connects the gear box 202 to realize torque output, drives the screw rod 203 to move, and makes the second motor to be tested 402 move to the target position.

[0064] In the embodiment of the present application, the driving motor 60 drives the gear to rotate, the gear drives the connected screw rod 203 to move, further, the screw rod 203 drives the second motor to be tested 402 to move. Optionally, the driving motor can determine the driving force applied to the gear according to the target distance in the preset driving scheme, realize torque output, so that the gear drives the screw rod 203, and the screw rod 203 drives the second motor to be tested 402 to move the target distance, that is, the second motor to be tested 402 moves to the target position.

[0065] Optionally, as shown in Figure 2 As shown, the radial force assembly 20 further comprises a moving slider 201, the moving slider 201 and the screw rod 203 are connected through a support, and the moving slider 201 is connected with one end of the second motor to be tested 402.

[0066] In the embodiment, the second sensor is installed on the moving slider 201, and the second motor to be tested 402 is more easily moved when the lead screw 203 applies a force to the moving slider 201, constant radial force loading is achieved, and the test accuracy is improved. Optionally, the moving slider 201 can be used in cooperation with the force sensor 80, and the movement of the moving slider 201 triggers the force sensor 80 to record data, thereby achieving accurate measurement.

[0067] Optionally, as shown in Figure 2 The system further includes a synchronous belt 70, and the first motor to be tested 401 and the second motor to be tested 402 are connected through the synchronous belt 70. In the embodiment, the synchronous belt 70 is used to synchronize the movement of the first motor to be tested 401 and the second motor to be tested 402 and cooperate with the radial force assembly to achieve radial force loading.

[0068] In the above embodiments, the radial force provided by the drive motor is transmitted to the second motor to be tested through the radial force assembly, and the first motor to be tested and the second motor to be tested receive the same radial force through the synchronous belt, thereby improving the test accuracy and test efficiency of the motor to be tested.

[0069] In one embodiment, as shown in Figure 3 The system further includes a vibration sensor 90 and a current sensor 100, and the at least one motor to be tested 40 includes the first motor to be tested 401 and the second motor to be tested 402, and the above load torque assembly 10 includes an inertia disc 101. The first inertia disc 101 in the inertia disc 101 is arranged on the first motor to be tested 401, and the second inertia disc 101 in the inertia disc 101 is arranged on the second motor to be tested 402. The vibration sensor 90 sends the vibration signals of the first motor to be tested 401 and the second motor to be tested 402 to the controller 50, and the current sensor 100 sends the current signals of the first motor to be tested 401 and the second motor to be tested 402 to the controller 50, so that the controller 50 predicts the life information of the motor to be tested according to the vibration signals and the current signals, and terminates the life test when the vibration signals or the current signals are abnormal.

[0070] The inertia disc 101 is used to simulate different load conditions and apply corresponding load torques.

[0071] In the embodiment of the present application, the controller 50 inputs a rotating speed instruction to the driving motor 60 to drive the first servo motor and the second servo motor to start running simultaneously, the inertia disc 101 includes a first inertia disc 101 and a second inertia disc 101, the first servo motor drives the first inertia disc 101 to run together, the second servo motor drives the second inertia disc 101 to run together, and the load torque stress loading is realized. Further, the vibration sensor 90 sends the vibration signals of the first motor to be tested 401 and the second motor to be tested 402 to the controller 50, and the current sensor 100 sends the current signals of the first motor to be tested 401 and the second motor to be tested 402 to the controller 50, so that the controller 50 determines whether to terminate the life test according to the preset test strategy, the vibration signals and the current signals.

[0072] Optionally, the vibration sensor 90 includes a first vibration sensor and a second vibration sensor, the first vibration sensor sends the first vibration signal of the first motor to be tested 401 to the controller 50, and the second vibration sensor sends the second vibration signal of the second motor to be tested 402 to the controller 50; the current sensor 100 includes a first current sensor 100 and a second current sensor 100, the first current sensor 100 sends the first current signal of the first motor to be tested 401 to the controller 50, and the second current sensor 100 sends the second current signal of the second motor to be tested 402 to the controller 50.

[0073] Optionally, as shown in Figure 3 The load torque assembly further includes a first driver 102 and a first driver 103; the first driver 102 is connected with the first motor to be tested 401 and is used for sending a driving signal to the first motor to be tested 401; and the first driver 103 is connected with the second motor to be tested 402 and is used for sending a driving signal to the second motor to be tested 402.

[0074] In the embodiment of the present application, the controller 50 sends a first rotating speed instruction to the first driver 102 to drive the first driver 102 to drive the first servo motor 401 to start running; and the controller 50 sends a second rotating speed instruction to the first driver 103 to drive the first driver 103 to drive the second motor to be tested 402 to start running.

[0075] In the above embodiment, different load conditions are simulated by the inertia disc, and corresponding load torques are applied; the test data of the first motor to be tested and the second motor to be tested are collected by the vibration sensor and the current sensor, so that the controller determines whether to terminate the life test according to the vibration signals and the current signals.

[0076] In one embodiment, as shown in Figure 4As shown in the above, the temperature component 30 includes a temperature environment box 301, the load torque component 10 and the radial force component 20 are arranged in the temperature environment box 301, and the control unit 02 is arranged outside the temperature environment box 301.

[0077] In the embodiment of the present application, the temperature environment box 301 can be any closed structure such as a cube, a cuboid, a cylinder, etc. The driving motor 60 and the controller 50 are arranged outside the temperature environment box to avoid adverse effects on the driving motor 60 and the control caused by the environmental stress loading process.

[0078] Optionally, as shown in the above, Figure 4 As shown in the above, the first motor to be tested 401 is installed on the linear guide rail table through the fixed sliding block 204; and the second motor to be tested 402 is installed on the linear guide rail table through the moving sliding block 201.

[0079] The fixed sliding block 204 is an important component of the test system, which is mainly used to provide stable connection and positioning function during the test. In the embodiment of the present application, the first motor to be tested 401 is installed on the linear guide rail table through the fixed sliding block 204, and the first motor to be tested 401 cannot move. The second motor to be tested 402 is installed on the linear guide rail table through the moving sliding block 201, and the second motor to be tested 402 can move on the linear guide rail table through the moving sliding block, thereby ensuring the integrity of the test device.

[0080] In the above embodiment, the driving motor and the controller are arranged outside the temperature environment box to avoid adverse effects on the driving motor and the control caused by the environmental stress loading process, thereby ensuring the service life and the measurement stability of the driving motor and the test and control test bench.

[0081] In the embodiment of the present application, as shown in the above, Figure 5 A method for accelerated life test of a servo motor is provided, and the method comprises the following steps.

[0082] S201, according to a preset life test strategy, control signals are sent to a driving motor, a first driver and a second driver in an accelerated life test system of a servo motor, so as to provide radial force, load torque and temperature environment for a motor to be tested.

[0083] In the embodiment of the present application, when the accelerated life test starts, first, the environmental test conditions are preset to realize environmental stress loading, then the test and control test bench inputs force control instructions, the driving motor is connected with the gear box to realize torque output, drives the lead screw to move, moves the second motor to be tested to a target position, synchronously tensions the belt, applies equal radial force to the first motor to be tested and the second motor to be tested. Finally, the first driver and the second driver are inputted with rotation speed instructions to drive the first motor to be tested and the second motor to be tested to start running at the same time, drive the inertia disc to run together, and realize load torque stress loading.

[0084] Optionally, the preset environmental test condition can be realized by the controller to control the temperature component to realize the environmental stress loading; or the environmental stress loading can be realized by manually adjusting the temperature component.

[0085] S202, receiving a monitoring signal sent by a sensor in the life test system.

[0086] In the embodiment of the application, the force sensor monitors the force of the moving slider on the lead screw in real time, and feeds back to the measurement and control test bench to realize torque closed loop, the force is equal to the synchronous belt tension, so as to realize constant loading of the radial force of the motor to be tested. While the first motor to be tested and the second motor to be tested move, the vibration sensor and the current sensor regularly collect the vibration signal and the current signal of the servo motor, and the abnormal fault signal indicates that the motor accelerated life test is terminated, and the test can also be terminated by obvious noise.

[0087] S203, obtaining the life information of the motor to be tested according to the monitoring signal and the preset prediction logic.

[0088] In the embodiment of the application, when the radial force is loaded, the force analysis of the servo motor is first carried out to obtain the radial load of the test motor bearing, the actual load is converted into equivalent dynamic load consistent with the condition of the determined rated dynamic load, and the relationship between the basic rated life and the basic rated dynamic load and the equivalent dynamic load is used to calculate the accelerated life of the test motor bearing. When the load torque is loaded, the load torque is equal to the oil seal torque under the constant speed state, so the servo motor can be reciprocated forward and backward to achieve the purpose of bearing fatigue cumulative damage, and the accelerated life of the servo motor is calculated by combining the servo motor speed curve and the average load torque of the output end.

[0089] Optionally, under different temperature environments, the life information of the motor to be tested is predicted according to the monitoring signal and the preset prediction logic.

[0090] In the above-mentioned accelerated life test method of the servo motor, according to the preset life test strategy, a control signal is sent to the driving motor in the accelerated life test system of the servo motor to provide the radial force, the load torque and the temperature environment to the motor to be tested; the monitoring signal sent by the sensor in the life test device is received; and the life information of the motor to be tested is obtained according to the monitoring signal and the preset prediction logic. By controlling each component in the test system to provide the radial force, the load torque and the temperature environment to the motor to be tested, the comprehensiveness of the test environment is improved, and further,

[0091] It should be understood that, although the steps in the flowcharts involved in the embodiments described above are shown in sequence according to the arrows, the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the execution of the steps is not strictly limited in sequence, and the steps can be executed in other sequences. Moreover, at least some of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least some of the other steps or the steps or stages in the other steps.

[0092] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0093] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An accelerated life testing system for a servo motor, characterized in that, The system includes: a test unit, a control unit, a unit under test (UUT), and a synchronous belt; the test unit includes a load torque component, a radial force component, and a temperature component; the UUT includes at least one motor under test; the control unit includes a controller and a drive motor; the load torque component and the radial force component are both connected to the UUT; the controller is connected to both the load torque component and the drive motor; the at least one UUT includes a first UUT and a second UUT; the radial force component includes: a gearbox, a lead screw, and a sliding block; the drive motor is connected to one end of the gearbox, one end of the lead screw is connected to the other end of the gearbox, the sliding block and the lead screw are connected by a support, and the sliding block is connected to one end of the second UUT; the first UUT and the second UUT are connected by the synchronous belt, so that the radial forces on the first UUT and the second UUT are the same; the drive motor is connected to the gearbox to achieve torque output, driving the lead screw to move, so that the second UUT moves to the target position; The load torque component is used to apply load torque stress to the motor under test; The radial force component is used to apply radial force to the motor under test; The temperature component is used to provide a preset temperature environment to the motor under test; The controller is used to control the drive motor to drive the radial force component and control the load torque component to provide the load torque stress when testing the unit under test.

2. The accelerated life testing system for servo motors according to claim 1, characterized in that, The system also includes a force sensor, which is connected to the second motor under test; The force sensor is used to detect the force exerted by the second motor under test on the radial force component and send the force to the controller.

3. The accelerated life testing system for servo motors according to claim 1, characterized in that, The system also includes a vibration sensor and a current sensor, the at least one motor under test includes a first motor under test and a second motor under test, and the load torque component includes an inertia disk. The first inertia disk of the inertia disk is disposed on the first motor under test, and the second inertia disk of the inertia disk is disposed on the second motor under test; The vibration sensor sends the vibration signals of the first motor under test and the second motor under test to the controller, and the current sensor sends the current signals of the first motor under test and the second motor under test to the controller, so that the controller can predict the life information of the motor under test based on the vibration signal and the current signal, and terminate the life test when the vibration signal or the current signal is abnormal.

4. The accelerated life testing system for servo motors according to claim 2 or 3, characterized in that, The temperature component includes a temperature environment chamber, the load torque component and the radial force component are disposed inside the temperature environment chamber, and the control unit is disposed outside the temperature environment chamber.

5. The accelerated life testing system for servo motors according to claim 2 or 3, characterized in that, The system also includes: a linear guide rail stage and a fixed slider; the linear guide rail stage is fixed inside the temperature component. The first motor under test is mounted on the linear guide rail via the fixed slider; The second motor under test is mounted on the linear guide rail via a movable slider.

6. The accelerated life testing system for servo motors according to claim 2 or 3, characterized in that, The load torque component further includes: a first driver and a second driver; The first driver is connected to the first motor under test and is used to send a drive signal to the first motor under test; The second driver is connected to the second motor under test and is used to send a drive signal to the second motor under test.

7. A method for accelerating the lifespan of a servo motor, characterized in that, The method uses the accelerated life testing system for servo motors as described in any one of claims 1-6, and the method includes: According to the preset life test strategy, control signals are sent to the drive motor, the first driver and the second driver in the accelerated life test system of the servo motor to provide radial force and load torque to the motor under test. Receive monitoring signals sent by the sensors in the life test system; Based on the monitoring signals and the preset prediction logic, the lifespan information of the motor under test is obtained.

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