Accelerated life test system and accelerated life test method for servo motor

Abstract

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

Description

Technical Field

[0001] The present application relates to the field of equipment technology, and in particular to an accelerated life test system and an accelerated life test method for a servo motor. Background Art

[0002] Servo motors are key core components that are widely used in the equipment field, especially in robots. The life of servo motors has an important impact on the reliability level of equipment, so it is necessary to accurately predict the life of servo motors.

[0003] In traditional technology, the life of servo motors is usually predicted through accelerated life tests. The purpose of the accelerated test is achieved by increasing the load stress and shortening the test time. The life information obtained under the accelerated stress level is then converted to obtain the life estimate of the product under normal stress level.

[0004] However, the traditional life test method has the problem of low test result accuracy due to the single sensitive stress. Summary of the invention

[0005] Based on this, it is necessary to provide an accelerated life test system and an accelerated life test method for a servo motor, which can improve the comprehensiveness of testing the servo motor, in order to solve the above technical problems.

[0006] In a first aspect, the present application provides an accelerated life test system for a servo motor, 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 component, a radial force component and a temperature component; 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 component and the radial force component are both connected to the unit to be tested; the controller is respectively connected to the load torque component and the drive motor; the drive motor is connected to the radial force component;

[0007] The load torque component is used to apply load torque stress to the motor to be tested;

[0008] The radial force component is used to apply radial force to the motor to be tested;

[0009] The temperature component is used to provide a temperature environment of a preset temperature to the motor to be tested;

[0010] 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 to be tested.

[0011] In one embodiment, the system further includes a force sensor, the at least one motor to be tested includes a first motor to be tested and a second motor to be tested, one end of the second motor to be tested is connected to the radial force component, and the other end of the second motor to be tested is connected to the first motor to be tested; the force sensor is connected to the second motor to be tested;

[0012] The driving motor drives the radial force assembly to move the second motor to be tested to a target position;

[0013] The force sensor is used to detect the force applied by the second motor to be tested to the radial force component, and send the force to the controller.

[0014] In one embodiment, the radial force assembly includes: a gear box and a lead screw; the drive motor is connected to one end of the gear box, one end of the lead screw is connected to the other end of the gear box; the other end of the lead screw is connected to one end of the second motor to be tested;

[0015] The driving motor is connected to the gear box to realize torque output, drive the lead screw to move, and move the second motor to be tested to the target position.

[0016] In one embodiment, the radial force assembly further includes: a movable slider, the movable slider and the lead screw are connected via a support, and the movable slider is connected to one end of the second motor to be tested.

[0017] In one embodiment, the system further comprises a vibration sensor and a current sensor, the at least one motor to be tested comprises a first motor to be tested and a second motor to be tested, and the load torque assembly comprises an inertia disk;

[0018] The first inertia disk among the inertia disks is arranged on the first motor to be tested, and the second inertia disk among the inertia disks is arranged on the second motor to be tested;

[0019] The vibration sensor sends the vibration signals of the first motor to be tested and the second motor to be tested to the controller, and the current sensor sends the current signals of the first motor to be tested and the second motor to be tested to the controller, so that the controller predicts the life information of the motor to be tested based on the vibration signal and the current signal, and terminates the life test when the vibration signal or the current signal is abnormal.

[0020] In one embodiment, the temperature component includes a temperature environment box, the load torque component and the radial force component are arranged inside the temperature environment box, and the control unit is arranged outside the temperature environment box.

[0021] In one embodiment, the system further comprises: a linear guide platform and a fixed slider; the linear guide platform is fixed in the temperature component;

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

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

[0024] In one embodiment, the system further includes: a synchronous belt, and the first motor to be tested and the second motor to be tested are connected by the synchronous belt.

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

[0026] The first driver is connected to the first motor to be tested, and is used to send a driving signal to the first motor to be tested;

[0027] The second driver is connected to the second motor to be tested, and is used to send a driving signal to the second motor to be tested.

[0028] In a second aspect, the present application further provides an accelerated life test method for a servo motor, the method being applied to a controller in an accelerated life test system for a servo motor as described in the first method, the method comprising:

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

[0030] Receiving a monitoring signal sent by a sensor in the life test system;

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

[0032] The above-mentioned accelerated life test system of the servo motor and the accelerated life test method of the servo motor, the system comprises: a test unit, a control unit and a unit to be tested; the test unit comprises a load torque component, a radial force component and a temperature component; 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 component and the radial force component are both connected to the unit to be tested; the controller is respectively connected to the load torque component and the drive motor; the drive motor is connected to the radial force component; the load torque component is used to apply load torque stress to the motor to be tested; the radial force component is used to apply radial force to the motor to be tested; the temperature component is used to provide a temperature environment of a preset temperature to the motor to be tested; the controller is used to control the drive motor to drive the radial force component and control the load torque component to provide load torque stress when testing the unit to be tested. By setting the load torque component, the radial force component and the temperature component in the system, multiple test stresses are provided for multiple groups of motors to be tested at the same time, thereby improving the accuracy and test efficiency of the life test of the motor to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A structural block diagram of an accelerated life test system for a servo motor in one embodiment;

[0035] Figure 2 A structural block diagram of an accelerated life test system for a servo motor in another embodiment;

[0036] Figure 3 A structural block diagram of an accelerated life test system for a servo motor in another embodiment;

[0037] Figure 4 A structural block diagram of an accelerated life test system for a servo motor in another embodiment;

[0038] Figure 5 A schematic flow chart of an accelerated life test method for a servo motor in one embodiment;

[0039] Description of reference numerals:

[0040] Test unit: 01; Control unit: 02; Unit under test: 03;

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

[0042] Motor under test: 40; Controller: 50; Drive motor: 60;

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

[0044] Gear box: 202; Screw: 203; Inertia plate: 101;

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

[0046] The first motor to be tested: 401; The second motor to be tested: 402; The fixed slider: 204;

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

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[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 "multiple" is more than two, unless otherwise clearly and specifically defined.

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

[0052] Servo motors are key core components that are widely used in the field of equipment, especially in robots, and their life has an important impact on the reliability level of equipment. The traditional servo motor life test method requires a lot of time and money to test under load conditions corresponding to the use environment. In order to overcome the high time cost of traditional life tests, accelerated life test technology has emerged. Accelerated life tests can achieve the purpose of accelerated testing by increasing load stress and shortening the test time without changing the failure mechanism of the product, and then convert the life information obtained under the stress level after acceleration to obtain the life estimate of the product under normal stress level. At present, there are many methods and equipment for testing the accelerated life of servo motors, but most of them are loaded with inertia disks to simulate load loads for measurement. This type of test equipment is mainly based on the principle of fatigue cumulative damage. The sensitive stress of the tested motor is limited to the load torque, and the influence of temperature and radial force on the life of the tested motor is not considered. Therefore, the traditional servo motor accelerated life test system has the problem of low accuracy of test results due to the single sensitive stress.

[0053] In one embodiment, Figure 1 As shown, an accelerated life test system for a servo motor is provided, the system comprising: a test unit 01, a control unit 02 and a unit to be tested 03; the test unit 01 comprises a load torque component 10, a radial force component 20 and a temperature component 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 drive motor 60; the load torque component 10 and the radial force component 20 are both connected to the unit to be tested 03; the controller 50 is respectively connected to the load torque component 10 and the drive motor 60; the drive motor 60 is respectively connected to the radial force component 20; the load torque component 10 is used to apply a load torque to the motor to be tested 40; the radial force component 20 is used to apply a radial force to the motor to be tested 40; the temperature component 30 is used to provide a temperature environment of a preset temperature to the motor to be tested 40; the controller 50 is used to control the drive motor 60 to drive the radial force component 20 and control the load torque component 10 to provide a load torque when testing the unit to be tested 03.

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

[0055] In an embodiment 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 includes 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 to receive test data returned by the test unit 01; the unit to be tested 03 may include one or more motors 40 to be tested.

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

[0057] Optionally, when the test unit 01 includes multiple motors 40 to be tested, each motor 40 to be tested is a motor of the same structure. It should be noted that when performing a life test on a servo motor, it is necessary to collect test data of a preset time length, and analyze the collected data to obtain the accelerated life test result of the servo motor. The same test environment can be provided for two or more servo motors at the same time, and the test data of all servo motors can be collected at the same time. Compared with collecting the data of one servo motor, the test data collection time is reduced.

[0058] Optionally, the temperature component 30 may include a temperature test chamber, and by changing the temperature motor corresponding to the temperature test chamber, a temperature environment of a preset temperature is provided for the accelerated life test system of the servo motor. Optionally, the temperature component may be controlled by a controller, or the temperature component may be controlled by manual adjustment. Optionally, other units and components in the accelerated life test system of the servo motor except the temperature test chamber may be arranged in the temperature test chamber.

[0059] In the above-mentioned accelerated life test system of the servo motor, the system includes: a test unit, a control unit and a unit to be tested; the test unit includes a load torque component, a radial force component and a temperature component; the unit to be tested includes at least one motor to be tested; the control unit includes a controller and a drive motor; the load torque component and the radial force component are both connected to the unit to be tested; the controller is respectively connected to the load torque component and the drive motor; the drive motor is connected to the radial force component; the load torque component is used to apply load torque stress to the motor to be tested; the radial force component is used to apply radial force to the motor to be tested; the temperature component is used to provide a temperature environment of a preset temperature to the motor to be tested; the controller is used to control the drive motor to drive the radial force component and control the load torque component to provide load torque stress when testing the unit to be tested. By setting the load torque component, the radial force component and the temperature component in the system, multiple test stresses are provided for multiple groups of motors to be tested at the same time, thereby improving the accuracy and test efficiency of the life test of the motor to be tested.

[0060] In one embodiment, Figure 2As shown, the system also includes a force sensor 80, at least one motor to be tested 40 includes 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 to the radial force component 20; the other end of the second motor to be tested 402 is connected to the first motor to be tested 401; the force sensor 80 is connected to the second motor to be tested 402; the drive motor 60 drives the radial force component 20 to transmit, so that the second motor to be tested 402 moves to the target position; the force sensor 80 is used to detect the force of the second motor to be tested 402 on the radial force component 20, and send the force to the controller 50.

[0061] In the embodiment of the present application, the radial force assembly 20 is used to receive the driving signal of the driving motor 60, thereby transmitting based on the driving signal, and driving the second motor to be tested 402 connected to the radial force assembly 20 to move, so that the radial force applied to 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 to the second motor to be tested 402, and 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 lead screw 203, and sends the second force to the controller 50.

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

[0063] Optional, such as Figure 2 As shown, the radial force assembly 20 includes: a gear box 202 and a lead screw 203; the drive motor 60 is connected to one end of the gear box 202, and one end of the lead screw 203 is connected to the other end of the gear box 202; the other end of the lead screw 203 is connected to one end of the second motor to be tested 402; the drive motor 60 is connected to the gear box 202 to realize torque output, drive the lead screw 203 to move, and move the second motor to be tested 402 to the target position.

[0064] In the embodiment of the present application, the drive motor 60 drives the gear to rotate, and the gear drives the connected lead screw 203 to move, and further, the lead screw 203 drives the second motor to be tested 402 to move. Optionally, the drive motor can determine the driving force applied to the gear according to the target distance in the preset drive scheme to achieve torque output, so that the gear drives the lead screw 203, and the lead screw 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] Optional, such as Figure 2 As shown, the radial force assembly 20 further includes: a movable slider 201 , the movable slider 201 and the lead screw 203 are connected via a support, and the movable slider 201 is connected to one end of the second motor to be tested 402 .

[0066] In this embodiment, the second sensor is mounted on the moving slider 201. When the lead screw 203 applies a force to the moving slider 201, it is easier to drive the second motor 402 to be tested to move, so as to achieve constant radial force loading, thereby improving the test accuracy. Optionally, the moving slider 201 can be used in conjunction with the force sensor 80, and the movement of the moving slider 201 can trigger the force sensor 80 to record data, thereby achieving accurate measurement.

[0067] Optional, such as Figure 2 As shown, the system further includes: a synchronous belt 70, and the first motor 401 to be tested and the second motor 402 to be tested are connected by the synchronous belt 70. In the embodiment of the present application, the synchronous belt 70 is used to make the first motor 401 to be tested and the second motor 402 to be tested move synchronously and cooperate with the radial force component to realize radial force loading.

[0068] In the above-mentioned application embodiment, the radial force provided by the driving motor is transmitted to the second motor to be tested through the radial force component in the radial force assembly, and the radial forces received by the first motor to be tested and the second motor to be tested are made the same through the synchronous belt, thereby improving the test accuracy and test efficiency of the motor to be tested.

[0069] In one embodiment, Figure 3 As shown, the system also includes a vibration sensor 90 and a current sensor 100, at least one motor to be tested 40 includes a first motor to be tested 401 and a second motor to be tested 402, and the load torque component 10 includes an inertia disk 101; the first inertia disk 101 in the inertia disk 101 is arranged on the first motor to be tested 401, and the second inertia disk 101 in the inertia disk 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 signal and the current signal, and terminates the life test when the vibration signal or the current signal is abnormal.

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

[0071] In the embodiment of the present application, the controller 50 inputs a speed command to the drive motor 60 to drive the first servo motor and the second servo motor to start running at the same time. The inertia disk 101 includes the first inertia disk 101 and the second inertia disk 101. The first servo motor drives the first inertia disk 101 to run together, and the second servo motor drives the second inertia disk 101 to run together to achieve load torque stress loading. Further, the vibration sensor 90 sends the vibration signals of the first motor 401 to be tested and the second motor 402 to be tested to the controller 50, and the current sensor 100 sends the current signals of the first motor 401 to be tested and the second motor 402 to be tested to the controller 50, so that the controller 50 determines whether to terminate the life test according to the preset test strategy, vibration signal and current signal.

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

[0073] Optional, such as Figure 3 As shown, the load torque component also includes: a first driver 102 and a first driver 103; the first driver 102 is connected to the first motor to be tested 401, and is used to send a drive signal to the first motor to be tested 401; the first driver 103 is connected to the second motor to be tested 402, and is used to send a drive signal to the second motor to be tested 402.

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

[0075] In the above application embodiment, different load conditions are simulated by an inertia disk and corresponding load torque is applied; test data of the first motor to be tested and the second motor to be tested are collected by a vibration sensor and a current sensor, so that the controller determines whether to terminate the life test based on the vibration signal and the current signal.

[0076] In one embodiment, Figure 4As shown, 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 drive motor 60 and the controller 50 are placed outside the temperature environment box to avoid adverse effects of environmental stress loading on the drive motor 60 and the controller.

[0078] Optional, such as Figure 4 As shown, the first motor to be tested 401 is installed on the linear guide platform through the fixed slider 204; the second motor to be tested 402 is installed on the linear guide platform through the movable slider 201.

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

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

[0081] In the embodiments of the present application, Figure 5 As shown, a method for accelerating life test of a servo motor is provided, the method comprising:

[0082] S201, according to a preset life test strategy, sending control signals to a drive 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 to the motor to be tested.

[0083] In the embodiment of the present application, when the accelerated life test begins, firstly, the environmental test conditions need to be preset to realize environmental stress loading, then the force control command is input to the measurement and control test bench, the drive motor is connected to the gear box to realize torque output, the lead screw is driven to move, the second motor to be tested is moved to the target position, the synchronous belt is tightened, and equal radial force is applied to the first motor to be tested and the second motor to be tested. Finally, the speed command is input to the first driver and the second driver to drive the first motor to be tested and the second motor to be tested to start running at the same time, driving the inertia disk to run together, and realizing load torque stress loading.

[0084] Optionally, the temperature component may be controlled by a controller to achieve preset environmental test conditions to achieve environmental stress loading; or, the environmental stress loading may be achieved by manually adjusting the temperature component.

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

[0086] In the embodiment of the present 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 the torque closed loop. This force is equal to the tension of the synchronous belt, so as to realize the 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 are moving, the vibration signal and current signal of the servo motor are regularly collected by the vibration sensor and the current sensor. The occurrence of abnormal fault signal indicates that the motor accelerated life test is terminated. It can also be judged whether the test is terminated by obvious abnormal noise.

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

[0088] In the embodiment of the present application, when radial force is loaded, the servo motor is first subjected to force analysis to obtain the radial load on the test motor bearing, and the actual load is converted into an equivalent dynamic load consistent with the conditions for determining the rated dynamic load. 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, considering that the load torque is equal to the oil seal torque under constant speed, the purpose of cumulative bearing fatigue damage can be achieved by reciprocating forward and reverse rotation of the servo motor, and the accelerated life of the servo motor is calculated by combining the servo motor speed curve and the average load torque at the output end.

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

[0090] In the above-mentioned accelerated life test method for servo motors, according to a preset life test strategy, a control signal is sent to the drive motor in the accelerated life test system of the servo motor to provide radial force, load torque and temperature environment to the motor to be tested; a monitoring signal sent by a 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 radial force, load torque and temperature environment to the motor to be tested, the comprehensiveness of the test environment is improved. Furthermore, on the basis of the above-mentioned test environment,

[0091] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0092] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An accelerated life test system for a servo motor, 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 component, a radial force component and a temperature component; 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 component and the radial force component are both connected to the unit to be tested; the controller is respectively connected to the load torque component and the drive motor; the drive motor is connected to the radial force component; The load torque component is used to apply load torque stress to the motor to be tested; The radial force component is used to apply radial force to the motor to be tested; The temperature component is used to provide a temperature environment of a preset temperature to the motor to be tested; 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 to be tested.

2. The servo motor accelerated life test system according to claim 1, characterized in that: The system further includes a force sensor, the at least one motor to be tested includes a first motor to be tested and a second motor to be tested, one end of the second motor to be tested is connected to the radial force component, and the other end of the second motor to be tested is connected to the first motor to be tested; the force sensor is connected to the second motor to be tested; The driving motor drives the radial force assembly to move the second motor to be tested to a target position; The force sensor is used to detect the force applied by the second motor to be tested to the radial force component, and send the force to the controller.

3. The accelerated life test system for a servo motor according to claim 2, characterized in that: The radial force assembly comprises: a gear box and a lead screw; the drive motor is connected to one end of the gear box, one end of the lead screw is connected to the other end of the gear box; the other end of the lead screw is connected to one end of the second motor to be tested; The driving motor is connected to the gear box to realize torque output, drive the lead screw to move, and move the second motor to be tested to the target position.

4. The servo motor accelerated life test system according to claim 3, characterized in that: The radial force assembly further includes: a movable slider, the movable slider and the lead screw are connected via a support, and the movable slider is connected to one end of the second motor to be tested.

5. The servo motor accelerated life test system according to claim 1, characterized in that: The system further comprises a vibration sensor and a current sensor, the at least one motor to be tested comprises a first motor to be tested and a second motor to be tested, and the load torque assembly comprises an inertia disk; The first inertia disk among the inertia disks is arranged on the first motor to be tested, and the second inertia disk among the inertia disks is arranged on the second motor to be tested; The vibration sensor sends the vibration signals of the first motor to be tested and the second motor to be tested to the controller, and the current sensor sends the current signals of the first motor to be tested and the second motor to be tested to the controller, so that the controller predicts the life information of the motor to be tested based on the vibration signal and the current signal, and terminates the life test when the vibration signal or the current signal is abnormal.

6. The accelerated life test system for a servo motor according to any one of claims 2 to 5, characterized in that: The temperature component comprises a temperature environment box, the load torque component and the radial force component are arranged inside the temperature environment box, and the control unit is arranged outside the temperature environment box.

7. The accelerated life test system for a servo motor according to any one of claims 2 to 5, characterized in that: The system further comprises: a linear guide platform and a fixed slider; the linear guide platform is fixed in the temperature component; The first motor to be tested is mounted on the linear guide platform through the fixed slider; The second motor to be tested is installed on the linear guide platform through a movable slider.

8. The accelerated life test system for a servo motor according to any one of claims 2 to 5, characterized in that: The system further includes: a synchronous belt, through which the first motor to be tested and the second motor to be tested are connected.

9. The accelerated life test system for a servo motor according to any one of claims 2 to 5, characterized in that: The load torque assembly further includes: a first driver and a second driver; The first driver is connected to the first motor to be tested, and is used to send a driving signal to the first motor to be tested; The second driver is connected to the second motor to be tested, and is used to send a driving signal to the second motor to be tested.

10. A method for accelerating the life of a servo motor, characterized in that: The method is used for a controller in an accelerated life test system for a servo motor according to any one of claims 1 to 9, and the method comprises: According to a preset life test strategy, a control signal is sent to a drive motor, a first driver, and a second driver in the accelerated life test system of the servo motor to provide radial force and load torque to the motor to be tested; Receiving a monitoring signal sent by a sensor in the life test system; The life information of the motor to be tested is obtained according to the monitoring signal and the preset prediction logic.

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