Suspension and traction test device and method of suspension type magnetic suspension carrying system

Abstract

The invention provides a suspension and traction test device and method for a suspended magnetic suspension carrying system. The test device comprises a track structure, a test carrier, a data acquisition unit and a control unit. Through cooperation of the suspension electromagnet and the suspension rail and cooperation of the linear induction motor and the traction rail, the test carrier can complete non-contact suspension motion under the condition that the test carrier does not make contact with any other component, the test environment of friction-free operation of a real hanging type simulation magnetic suspension carrying system is achieved, and on this basis, the test efficiency is improved. A closed-loop system is formed by matching a data acquisition unit and a control unit, interaction between suspension and traction states can be monitored and dynamically adjusted in real time, the accuracy and reliability of suspension-traction coupling characteristic research are remarkably improved, and meanwhile, the integrated design enables the whole device to be compact in structure, high in test efficiency and high in reliability. And an efficient and reliable test platform is provided for research and development of a hanging type magnetic suspension carrying system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic levitation transportation system testing, in particular to a suspension and traction test device and method for a suspended magnetic levitation transportation system. BACKGROUND

[0002] The content of this part only provides background information related to the present application, which may not constitute prior art.

[0003] As a new type of transportation, the suspended magnetic levitation transportation system has unique advantages such as not occupying ground space and having little impact on urban landscape, and is gradually becoming an important research direction of new track transportation.

[0004] In the research and development process of the suspended magnetic levitation transportation system, the suspension and traction technology is one of the core keys, which is directly related to the stability, safety and efficiency of the magnetic levitation vehicle operation. Therefore, it is necessary to test and evaluate the suspension and traction performance of the suspended magnetic levitation transportation system through a test device during the research and development process. SUMMARY

[0005] The present application relates to the technical field of magnetic levitation transportation system testing, in particular to a suspension and traction test device and method for a suspended magnetic levitation transportation system.

[0006] 1. Friction damping is difficult to eliminate, which seriously affects the test accuracy of the suspension force and the traction force;

[0007] 2. It is impossible to accurately simulate the non-contact operation characteristics of the real magnetic levitation transportation system;

[0008] 3. It is difficult to study the coupling relationship between the suspension system and the traction system;

[0009] 4. The test results cannot truly reflect the actual performance of the magnetic levitation transportation system.

[0010] Therefore, the purpose of the present application is to provide a suspension and traction test device and method for a suspended magnetic levitation transportation system, especially a test device that relies on non-contact motion for suspension and traction testing, to at least overcome the drawbacks of contact test devices.

[0011] The purpose of the present application is achieved by the following technical solutions:

[0012] On the one hand, the present application provides a suspension and traction test device for a suspended magnetic levitation transportation system, comprising:

[0013] The track structure comprises a mounting frame; the mounting frame is provided with a suspension rail and a traction rail extending in a longitudinal direction;

[0014] The test carrier has a non-suspension state in contact with a support surface located below the mounting frame, and a suspension state suspended below the mounting frame and away from the support surface;

[0015] The test carrier is provided with a suspension electromagnet corresponding to the suspension rail, and a linear induction motor corresponding to the traction rail; the suspension electromagnet is arranged opposite to the corresponding suspension rail, for generating an electromagnetic attraction force to keep the test carrier in the suspension state; the linear induction motor is arranged opposite to the corresponding traction rail, for generating a traction force or a braking force acting on the test carrier and in the longitudinal direction;

[0016] A data acquisition unit is configured to acquire a first air gap parameter between the suspension electromagnet and the corresponding suspension rail, a second air gap parameter between the linear induction motor and the corresponding traction rail, and a first vibration parameter of the suspension electromagnet;

[0017] A control unit, the linear induction motor, the suspension electromagnet are electrically connected to the control unit, and the data acquisition unit is communicatively connected to the control unit.

[0018] Optionally, the data acquisition unit is further configured to acquire a second vibration parameter of the test carrier.

[0019] Optionally, the data acquisition unit comprises:

[0020] A first vibration acceleration sensor connected to the suspension electromagnet for acquiring the first vibration parameter;

[0021] A second vibration acceleration sensor connected to the test carrier for acquiring the second vibration parameter.

[0022] Optionally, the data acquisition unit comprises:

[0023] A first laser displacement sensor for acquiring the first air gap parameter; the suspension electromagnet is provided with the first laser displacement sensor at both ends in the longitudinal direction;

[0024] A second laser displacement sensor for acquiring the second air gap parameter; the linear induction motor is provided with the second laser displacement sensor at both ends in the longitudinal direction.

[0025] Optionally, the test carrier is provided with a rubber wheel configured to be in contact with the support surface when the test carrier is in the non-suspension state.

[0026] Optionally, the control unit includes an operation console, a data acquisition instrument, and a suspension controller provided on the test vehicle;

[0027] The suspension controller is electrically connected to the suspension electromagnet, the linear induction motor is electrically connected to the operation console, the data acquisition unit is communicatively connected to the data acquisition instrument, and both the suspension controller and the data acquisition instrument are communicatively connected to the operation console.

[0028] Optionally, the test vehicle is provided with a counterweight, and the weight of the counterweight is adjustable.

[0029] Optionally, there are two suspension rails, and the two suspension rails are symmetrically distributed with the traction rail as the center;

[0030] The mounting frame comprises:

[0031] two longitudinal connecting portions, both extending in the longitudinal direction and spaced apart by a predetermined distance in the transverse direction;

[0032] A plurality of transverse connecting parts are sequentially arranged along the longitudinal direction between the two longitudinal connecting parts; both ends of each transverse connecting part are connected to the two longitudinal connecting parts respectively;

[0033] The two suspension rails are respectively installed at the bottom of the two longitudinal connecting parts; and the traction rail is connected to the bottom of the plurality of transverse connecting parts.

[0034] Optionally, the track structure further comprises a plurality of gate-shaped support beams; the plurality of support beams are sequentially arranged along the longitudinal direction;

[0035] The crossbeam of each support beam is connected to the mounting frame, so that the mounting frame is supported on the supporting surface by a plurality of the support beams.

[0036] In another aspect, the present invention provides a suspension and traction test method for a suspended magnetic levitation vehicle system, using the suspension and traction test device for the suspended magnetic levitation vehicle system described above; the method comprises the following steps:

[0037] Controlling the levitation electromagnet to start, so that the test vehicle switches from the non-levitation state to the levitation state; collecting the first air gap parameter and the first vibration parameter at this time as static levitation parameters, and sending them to the control unit; the control unit closed-loop regulating the current of the levitation electromagnet based on the static levitation parameters until the test vehicle is stably levitated;

[0038] Controlling the linear induction motor to start, and the control unit adjusting the current magnitude and / or direction of the linear induction motor to cause the test vehicle to perform suspended motion along the longitudinal direction in different motion states; the motion states include accelerated motion, uniform motion, and decelerated motion;

[0039] In each of the motion states, collecting the first air gap parameter and the first vibration parameter as dynamic suspension parameters, collecting the second air gap parameter as dynamic traction parameters, and sending the dynamic suspension parameters and the dynamic traction parameters to the control unit;

[0040] Repeating the above steps under various working conditions of the test vehicle with different loads to obtain multiple sets of test parameters; the test parameters include the static suspension parameters, the dynamic suspension parameters, and the dynamic traction parameters;

[0041] The performance of the suspended maglev transportation system is evaluated based on multiple sets of the test parameters.

[0042] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0043] The test device disclosed in the present invention, through the coordinated cooperation of the suspension electromagnet and the suspension rail, the linear induction motor and the traction rail, can enable the test vehicle to complete non-contact suspension movement without contacting any other components, thereby realizing a test environment for a real suspended simulated magnetic levitation carrier system with frictionless operation. On this basis, the closed-loop system composed of a data acquisition unit and a control unit can monitor and dynamically adjust the interaction between the suspension and traction states in real time, effectively solving the problem of poor test accuracy caused by friction interference in traditional contact test devices, and significantly improving the accuracy and reliability of the suspension-traction coupling characteristic research. At the same time, the integrated design makes the entire device compact and has high test efficiency, providing an efficient and reliable test platform for the research and development of suspended magnetic levitation carrier systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic structural diagram of a suspension and traction test device for a suspended magnetic levitation vehicle system provided by an embodiment of the present invention;

[0045] Figure 2 for Figure 1 ; which shows the test vehicle in a suspended state;

[0046] Figure 3 for Figure 2 A magnified view of the local structure at point A;

[0047] Figure 4 A schematic diagram of a partial structure of a track structure provided by an embodiment of the present invention and an enlarged diagram of a partial structure thereof;

[0048] Figure 5 A structural schematic diagram of a test carrier provided for an embodiment of the present application is shown in the following figure;

[0049] Figure 6 For Figure 5 A local structure enlargement view at B in the middle.

[0050] Figure legend: 10-track structure, 11-mounting rack, 111-longitudinal connecting part, 112-transverse connecting part, 113-adaptor, 12-support beam, 121-cross beam, 13-suspension rail, 14-traction rail, 15-hanging plate, 20-test carrier, 21-suspension electromagnet, 22-linear induction motor, 23-electromagnet mounting seat, 231-mounting part, 24-motor mounting support, 25-rubber wheel, 30-data acquisition unit, 31-first laser displacement sensor, 32-second laser displacement sensor, 33-first vibration acceleration sensor, 34-second vibration acceleration sensor, 35-first sensor mounting seat, 36-second sensor mounting seat, 40-control unit, 41-operation console, 42-data acquisition instrument, 43-suspension controller, 50-power supply, 60-counterweight, s-supporting surface. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in conjunction with specific embodiments. The same reference signs in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0052] Compared with the embodiments shown in the drawings, the feasible implementation schemes within the scope of protection of the present application can have fewer components, other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as multiple separate components.

[0053] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meanings understood by those of ordinary skill in the art to which the present application belongs. The terms “first”, “second” and similar terms used in the specification and claims of the present application do not represent any order, quantity or importance, but are only used to distinguish different components.

[0054] The embodiment of the present application provides a suspension and traction test device of a suspension type magnetic levitation load carrying system, in order to facilitate the description, the suspension and traction test device of the suspension type magnetic levitation load carrying system disclosed by the embodiment of the present application is referred to as a test device

[0055] Figure 1 The structural schematic diagram of the exemplary test device provided by the embodiment of the present application, Figure 2 The side view of Figure 1 .

[0056] As shown in Figure 1 and Figure 2 , according to the embodiment of the present application, the test device can comprise a track structure 10, a test vehicle 20, a data acquisition unit 30 and a control unit 40.

[0057] The track structure 10 is mainly used to provide a track for the longitudinal suspension movement of the test vehicle 20. Specifically, in combination with the content shown in Figure 1 and Figure 4 , the track structure 10 can comprise a mounting frame 11 and a plurality of support beams 12.

[0058] The plurality of support beams 12 are sequentially arranged in the longitudinal direction. Each support beam 12 can be in the shape of a door, and the cross beam 121 of each support beam 12 in the horizontal direction is connected to the mounting frame 11, so as to support the mounting frame 11 on the support surface s through the plurality of support beams 12, as shown in Figure 2 . This design can reliably keep the mounting frame 11 below the cross beam 121 of the support beam 12, and help to improve the structural strength of the track structure 10.

[0059] Among them, the longitudinal direction described in the embodiment of the present application can be understood as the driving direction of the test vehicle 20 when it is in suspension movement, and the transverse direction to be described below can be understood as the horizontal direction perpendicular to the longitudinal direction. In addition, the support surface s described in the embodiment of the present application can be the water surface of the ground or other suitable workbench, which is not limited here.

[0060] As shown in Figure 2 and Figure 3 , the mounting frame 11, especially the bottom of the mounting frame 11, can be provided with a suspension rail 13 and a traction rail 14 extending in the longitudinal direction. Among them, the suspension rail 13 can be an aluminum plate in the shape of U, and the suspension rail 13 can be fixedly installed on the bottom of the mounting frame 11 through bolts. The traction rail 14 can be an aluminum plate in the shape of a rectangle, and the traction rail 14 can be fixedly installed on the bottom of the mounting frame 11 through a plurality of hanging plates 15 sequentially arranged in the longitudinal direction, and the traction rail 14 and the hanging plate 15, the hanging plate 15 and the mounting frame 11 can be connected through bolts.

[0061] The test carrier 20 can make longitudinal levitation movement. Moreover, the test carrier 20 has a non-levitation state and a levitation state. In the non-levitation state, the test carrier 20 is in contact with the support surface s located below the mounting rack 11, i.e. is supported by the support surface s; in the levitation state, the test carrier 20 is separated from the support surface s and levitates below the mounting rack 11, thereby providing a basis for the levitation movement of the test carrier 20, as shown in Figure 2 .

[0062] Specifically, in order to realize the levitation movement of the test carrier 20, the test carrier 20, especially the top of the test carrier 20, can be provided with levitation electromagnets 21 and linear induction motors 22.

[0063] As shown in Figure 3 , the levitation electromagnets 21 correspond to the levitation rails 13 one by one. Among them, the levitation electromagnets 21 are oppositely arranged with the corresponding levitation rails 13, i.e. there is an air gap in the vertical direction between the two, which is used to generate electromagnetic attraction to keep the test carrier 20 in the levitation state. Specifically, when the levitation electromagnets 21 are powered, the electromagnetic attraction between the levitation electromagnets 21 and the levitation rails 13 can act on the test carrier 20 and be upward, so as to make the test carrier 20 separate from the support surface s and levitate below the mounting rack 11.

[0064] The linear induction motors 22 correspond to the traction rails 14 one by one. Among them, the linear induction motors 22 are oppositely arranged with the corresponding traction rails 14, i.e. there is an air gap in the vertical direction between the two, which is used to generate traction or braking force acting on the test carrier 20 and in the longitudinal direction. Specifically, when the linear induction motors 22 are powered, the force between the linear induction motors 22 and the traction rails 14 can act on the test carrier 20 and be in the longitudinal direction, when the direction of the force is the same as the target driving direction of the test carrier 20, the force acts as the traction force to make the test carrier 20 make levitation movement in the target driving direction; otherwise, on the basis of the linear induction motors 22 being powered to generate traction force, only the direction of the current flowing into the linear induction motors 22 needs to be changed, i.e. the braking force opposite to the direction of the traction force can be generated, thereby braking the test carrier 20.

[0065] The data acquisition unit 30 is used at least to acquire a first air gap parameter between the levitation electromagnet 21 and the corresponding levitation rail 13, a second air gap parameter between the linear induction motor 22 and the corresponding traction rail 14, and a first vibration parameter of the levitation electromagnet 21. The first air gap parameter is used to reflect the spacing and lateral displacement between the levitation electromagnet 21 and the corresponding levitation rail 13, the second air gap parameter is used to reflect the spacing between the linear induction motor 22 and the corresponding traction rail 14, and the first vibration parameter is used to reflect the vibration of the levitation electromagnet 21. The first vibration parameter can be the vibration acceleration of the levitation electromagnet 21 in the vertical direction and the lateral direction. The lateral displacement between the levitation electromagnet 21 and the corresponding levitation rail 13 refers to the relative displacement of the two in the lateral direction, and the relative displacement distance of the two in the lateral direction can be directly determined from the lateral displacement.

[0066] For the control unit 40, the linear induction motor 22 and the levitation electromagnet 21 are electrically connected to the control unit 40, and the data acquisition unit 30 is in communication connection with the control unit 40 to facilitate information exchange and corresponding control.

[0067] Specifically, in the levitation test phase of the test test, after the levitation electromagnet 21 is powered on and the test vehicle 20 is in a levitation state, the data acquisition unit 30 can acquire the first air gap parameter and the first vibration parameter at this time and send them to the control unit 40; the control unit 40 can record and save the first air gap parameter and the first vibration parameter at this time to provide data support for subsequent analysis of the levitation and traction performance of the suspended maglev system; at the same time, the control unit 40 can adjust the current of the levitation electromagnet 21 based on the known levitation control algorithm and in combination with the first air gap parameter and the first vibration parameter at this time, until the electromagnetic attraction generated by the power-on of the levitation electromagnet 21 can ensure the stable levitation of the test vehicle 20.

[0068] On the basis of the stable levitation of the test vehicle 20, the levitation running test phase is entered. In the levitation running test phase of the test test, the linear induction motor 22 is powered on to make the test vehicle 20 move in the longitudinal direction, and in this process, the data acquisition unit 30 can acquire the first air gap parameter, the second air gap parameter and the first vibration parameter at this time and send them to the control unit 40; the control unit 40 can record and save the first air gap parameter, the second air gap parameter and the first vibration parameter at this time to provide data support for subsequent analysis of the levitation and traction performance of the suspended maglev system; at the same time, the control unit 40 can also control the current of the linear induction motor 22 to adjust the traction force acting on the test vehicle 20 or provide a braking force to the test vehicle 20 to brake it.

[0069] It can be seen that the test device disclosed by the embodiment of the application can realize the non-contact suspension movement of the test carrier 20 without contacting any other components through the cooperation of the suspension electromagnet 21 and the suspension rail 13 and the linear induction motor 22 and the traction rail 14, realize the test environment of the frictionless operation of the real simulation hanging type magnetic levitation carrier system, and on this basis, the closed loop system formed by the data acquisition unit 30 and the control unit 40 can monitor and dynamically adjust the interaction of the suspension and traction states in real time, effectively solve the problem of poor test accuracy caused by friction interference of the traditional contact type test device, significantly improve the accuracy and reliability of the suspension-traction coupling characteristic research, and at the same time, the integrated design makes the whole device structure compact and the test efficiency high, and provides an efficient and reliable test platform for the research and development of the hanging type magnetic levitation carrier system.

[0070] In some possible embodiments, the test carrier 20 can be a frame structure with four open sides as shown in Figure 1 or Figure 5 Such a design facilitates the installation of related equipment such as the control unit 40 on the test carrier 20 while reducing the weight.

[0071] In some possible embodiments, the data acquisition unit 30 is further configured to acquire a second vibration parameter of the test carrier 20. The second vibration parameter is used to reflect the vibration condition of the test carrier 20. Specifically, the second vibration parameter can be the vibration acceleration of the test carrier 20 in the vertical direction and the lateral direction.

[0072] Through the acquisition of the second vibration parameter, the vibration condition of the test carrier 20 can be monitored in real time during the test, so as to provide reliable data support for evaluating the stability of the test carrier 20 in the suspension state.

[0073] In some possible embodiments, as shown in Figure 5 and Figure 6 The suspension electromagnet 21 is installed on the top of the test carrier 20 through the electromagnet mounting seat 23. The electromagnet mounting seat 23 can be made of aluminum alloy and includes two mounting parts 231. The two mounting parts 231 are respectively located on the two sides of the suspension electromagnet 21 in the lateral direction, and the bottoms of the two mounting parts 231 do not contact, so that the suspension electromagnet 21 after being electrified can generate more stable electromagnetic attraction.

[0074] In some possible embodiments, the linear induction motor 22 is installed on the top of the test carrier 20, especially the center of the top of the test carrier 20, through the motor mounting bracket 24. Correspondingly, the traction rail 14 can be installed at the center of the bottom of the mounting frame 11.

[0075] And, the suspension rails 13 can be two, and the two suspension rails 13 are symmetrically distributed with the traction rail 14 as the center. Correspondingly, the suspension electromagnets 21 are also two, and the two suspension electromagnets 21 are symmetrically distributed with the linear induction motor 22 as the center. By adopting the design of symmetrically arranging the two suspension electromagnets 21 with the linear induction motor 22 as the center, a more balanced and stable suspension type magnetic levitation structure can be constructed, so that the electromagnetic attraction acting on the test vehicle 20 is more uniform, thereby being more conducive to realizing the reliable suspension of the test vehicle 20.

[0076] In some possible embodiments, the data acquisition unit 30 can be configured to realize the acquisition of the first air gap parameter, the second air gap parameter, the first vibration parameter and the second vibration parameter in the following manner, but is not limited thereto.

[0077] Specifically, in combination with the contents shown in Figure 3 , Figure 5 and Figure 6 , the data acquisition unit 30 can include a first laser displacement sensor 31, a second laser displacement sensor 32, a first vibration acceleration sensor 33 and a second vibration acceleration sensor 34.

[0078] The first laser displacement sensor 31 is mainly used to acquire the first air gap parameter. The first laser displacement sensor 31 can be installed on the test vehicle 20 at an appropriate position on the top of the test vehicle 20 through a first sensor mounting seat 35 to detect the distance and the lateral displacement between the suspension electromagnet 21 and the corresponding suspension rail 13. Preferably, the first laser displacement sensor 31 can be arranged at both ends of the suspension electromagnet 21 in the longitudinal direction, which is conducive to improving the accuracy of the acquired first air gap parameter.

[0079] The second laser displacement sensor 32 is mainly used to acquire the second air gap parameter. The second laser displacement sensor 32 can be installed on the test vehicle 20 at an appropriate position on the top of the test vehicle 20 through a second sensor mounting seat 36 to detect the distance between the linear induction motor 22 and the corresponding traction rail 14. Preferably, the second laser displacement sensor 32 can be arranged at both ends of the linear induction motor 22 in the longitudinal direction, which is conducive to improving the accuracy of the acquired second air gap parameter.

[0080] The first vibration acceleration sensor 33 can be connected to the suspension electromagnet 21, for example, mounted on the electromagnet mounting seat 23 corresponding to the suspension electromagnet 21, to acquire the vibration acceleration of the suspension electromagnet 21 in the vertical direction and the lateral direction as the first vibration parameter.

[0081] The second vibration acceleration sensor 34 can be connected to the test vehicle 20, for example, mounted on the bottom plate of the test vehicle 20, to acquire the vibration acceleration of the test vehicle 20 in the vertical direction and the lateral direction as the second vibration parameter.

[0082] In some possible embodiments, as shown in Figure 1 or Figure 2 The test vehicle 20, especially the bottom of the test vehicle 20, can also be provided with rubber wheels 25. The rubber wheels 25 are configured to be in contact with the support surface s when the test vehicle 20 is in a non-suspended state.

[0083] That is, when the test vehicle 20 is in a non-suspended state, the rubber wheels 25 support the test vehicle 20 on the support surface s, so that the test vehicle 20 has the ability to move flexibly on the support surface s. This design is beneficial to conveniently adjust the position of the test vehicle 20 during the assembly stage of the test device, and at the same time, if the test vehicle 20 falls due to suspension failure during the test test, the rubber wheels 25 can also reduce the impact vibration, and prevent equipment damage and personnel injury as much as possible. This structure not only improves the safety of the system, but also provides a physical verification means for fault simulation test.

[0084] In some possible embodiments, as shown in Figure 2 The control unit 40 can specifically include an operation console 41, a data acquisition instrument 42, and a suspension controller 43. The operation console 41, the data acquisition instrument 42, and the suspension controller 43 can all be arranged on the test vehicle 20. For example, the operation console 41 can be arranged on the bottom plate of the test vehicle 20, the data acquisition instrument 42 can be arranged on the bottom of the test vehicle 20, and the suspension controller 43 can be arranged on the top of the test vehicle 20, so as to optimize the structural design of the test vehicle 20.

[0085] In addition, the suspension controller 43 is electrically connected with the suspension electromagnet 21, the linear induction motor 22 is electrically connected with the operation console 41, the data acquisition unit 30 is in communication connection with the data acquisition instrument 42, and the suspension controller 43 and the data acquisition instrument 42 are both in communication connection with the operation console 41.

[0086] In this way, during the suspension test stage of the test test, the data acquisition unit 30 can send the first air gap parameter and the first vibration parameter acquired at this time to the data acquisition instrument 42, and the data acquisition instrument 42 generates an electrical signal recognizable by the operation console 41 after processing the corresponding parameters, and sends the electrical signal to the operation console 41, so that the operation console 41 records and saves these parameters; at the same time, the operation console 41 can also calculate the current required by the suspension electromagnet 21 based on a known suspension control algorithm and in combination with the corresponding parameters, and send instructions to the suspension controller 43 to adjust the current of the suspension electromagnet 21 through the suspension controller 43.

[0087] Similarly, in the suspension running test phase of the test test, the data acquisition unit 30 can send the first air gap parameter, the second air gap parameter and the first vibration parameter obtained at this time to the data acquisition instrument 42, and the data acquisition instrument 42 generates an electrical signal recognizable by the operation console 41 after processing the corresponding parameters, and sends it to the operation console 41, and the operation console 41 records and saves these parameters, so as to provide data support for subsequent analysis of the suspension and traction performance of the suspended magnetic levitation system; at the same time, the operation console 41 can also directly control the linear induction motor 22, so that the linear induction motor 22 generates a corresponding size of traction force or braking force.

[0088] This design can realize centralized monitoring and linkage control of multiple key parameters such as suspension height, traction force size, vibration acceleration, etc. through the operation console 41, so that the whole system can automatically adjust the current of the suspension electromagnet 21 and the power of the linear induction motor 22 according to the running state, optimize the suspension-traction coupling relationship, and improve the vehicle running stability and energy efficiency performance.

[0089] Secondly, as can be seen from the foregoing, by configuring sensor devices including laser displacement sensors and vibration acceleration sensors, and arranging these sensors at key positions of the test vehicle 20, parameters such as suspension air gap, lateral displacement and vibration acceleration are collected in real time, and these parameters are centrally processed by the data acquisition instrument 42, thereby building a complete running state perception and data analysis platform, which is beneficial to providing reliable data support for system optimization.

[0090] In some possible embodiments, as shown in Figure 2 The power supply 50 can be provided on the test vehicle 20, especially on the bottom of the test vehicle 20, so as to supply power to the related electrical components of the test device through the power supply 50.

[0091] In some possible embodiments, as shown in Figure 5 The counterweight 60 can be provided on the test vehicle 20, especially on the bottom plate of the test vehicle 20, and the weight of the counterweight 60 is adjustable. By providing the counterweight 60 with adjustable weight, suspension and traction tests can be performed under different load conditions of the test vehicle 20, which helps to comprehensively evaluate the dynamic response characteristics of the system under different loads.

[0092] There are various ways to achieve adjustable weight of the counterweight 60. For example, a relatively simple way is that the counterweight 60 can be a plurality of counterweight blocks (such as steel blocks) with a certain weight, and the counterweight blocks are placed on the bottom plate of the test vehicle 20. On this basis, only the number of counterweight blocks placed on the test vehicle 20 needs to be increased or decreased, so as to achieve the purpose of adjusting the weight of the counterweight 60.

[0093] In some possible embodiments, combined with Figure 4 As shown, the mounting frame 11 may specifically include two longitudinal connecting portions 111 and a plurality of transverse connecting portions 112 .

[0094] The two longitudinal connecting parts 111 extend longitudinally and are spaced apart by a predetermined distance in the transverse direction.

[0095] Multiple transverse connectors 112 are arranged longitudinally between the two longitudinal connectors 111. Each transverse connector 112 is connected to the two longitudinal connectors 111 at both ends via adapters 113. Transverse connectors 112 can be rectangular tubes, and adapters 113 can be H-shaped steel. Bolts connect the adapters 113 to the longitudinal connectors 111 and to the transverse connectors 112.

[0096] The two aforementioned suspension rails 13 are respectively mounted at the bottom of the two longitudinal connecting portions 111, and can be bolted to adapters 113 connected to the longitudinal connecting portions 111. The traction rail 14 is connected to the bottoms of the plurality of transverse connecting portions 112, and can be connected to the transverse connecting portions 112 via the aforementioned hanging plates 15. Accordingly, the components connected to the support beam 12 can be the two longitudinal connecting portions 111.

[0097] The mounting frame 11 designed as described above can not only further enhance the structural strength of the entire track structure 10 , but also provide the mounting frame 11 with good scalability and assembly flexibility, support rapid disassembly and assembly and reuse, and be suitable for maglev test environments of different sizes and types.

[0098] In order to understand the test device disclosed in the embodiment of the present invention more clearly and intuitively, on the other hand, the embodiment of the present invention also provides a suspension and traction test method for a suspended magnetic levitation carrier system, using the suspension and traction test device of the suspended magnetic levitation carrier system described above.

[0099] Specifically, the test method may include the following steps:

[0100] Step S10: Test device preparation stage.

[0101] Install the entire test device at the test site, ensure that the support beam 12 in the track structure 10 is firmly connected to the support surface s, and ensure that the suspension rail 13, traction rail 14, longitudinal connection part 111 and transverse connection part 112 of the mounting frame 11 are accurately assembled and in a horizontal state.

[0102] The test vehicle 20 is installed below the mounting frame 11 to ensure the accurate alignment between the levitation electromagnet 21 and the levitation rail 13 and between the linear induction motor 22 and the traction rail 14, and to complete the electrical and mechanical connection of each component.

[0103] According to the test test requirements, the weight of the counterweight 60 on the test vehicle 20 is adjusted to make the load of the test vehicle 20 meet the load working condition requirements required by the test test.

[0104] Step S20. Suspension test phase.

[0105] The levitation electromagnet 21 is controlled to start to generate electromagnetic attraction as levitation force, so that the test vehicle 20 is switched from a non-suspended state to a suspended state. The data acquisition unit 30 acquires the first air gap parameter and the first vibration parameter at this time as static suspension parameters, and sends them to the data acquisition instrument 42 of the control unit 40. The static suspension parameters are processed by the data acquisition instrument 42 and sent to the operation console 41 of the control unit 40. The operation console 41 of the control unit 40 adjusts the current of the levitation electromagnet 21 based on the static suspension parameters in a closed loop until the test vehicle 20 is stably suspended. The specific adjustment process can be referred to the foregoing description, which will not be described in detail here.

[0106] Step S30. Suspension running test phase.

[0107] In the state that the test vehicle 20 is stably suspended, the linear induction motor 22 is controlled to start, and the control unit 40 adjusts the current size and / or direction of the linear induction motor 22 to make the test vehicle 20 do suspended motion in the longitudinal direction in different motion states. Among them, the motion state of the test vehicle 20 includes acceleration motion, uniform motion and deceleration motion.

[0108] In each motion state, the data acquisition unit 30 acquires the first air gap parameter and the first vibration parameter at this time as dynamic suspension parameters, and acquires the second air gap parameter as dynamic traction parameter, and sends the dynamic suspension parameters and the dynamic traction parameters to the control unit 40, so as to monitor the suspension and traction parameters of the test vehicle 20 in the process of suspended motion in real time, and provide data support for subsequent analysis of the suspension and traction performance of the suspension type magnetic levitation system.

[0109] Step S40. Repeat the test.

[0110] In different working conditions of the load of the test vehicle 20, the above steps S20 to S30 are repeated to obtain a plurality of sets of test parameters. Each set of test parameters includes corresponding static suspension parameters, dynamic suspension parameters and dynamic traction parameters.

[0111] The performance of the suspension type magnetic levitation load carrying system is evaluated based on multiple sets of test parameters. Specifically, the key indicators such as the suspension height, traction force and vibration acceleration of the test vehicle 20 under different working conditions are compared, the differences in the suspension and traction performance of the suspension type magnetic levitation load carrying system under different working conditions are evaluated and analyzed, and the evaluation and analysis results are obtained.

[0112] On this basis, combined with the evaluation and analysis results, a suspension-traction coupling model of the suspension type magnetic levitation load carrying system can be constructed, and the suspension control algorithm is optimized based on known technologies, so as to improve the operation efficiency and stability of the suspension control algorithm, and to provide support for the improvement of the structure design, material selection, control strategy and other aspects of the magnetic levitation vehicle.

[0113] In some possible embodiments, between step S30 and step S40, the following steps can also be included:

[0114] Step S35. Fault simulation test.

[0115] During the process of the test vehicle 20 making the longitudinal suspension motion, the power supply of part of the suspension electromagnets 21 can be actively disconnected or the supply voltage of the suspension electromagnets 21 can be reduced, so as to simulate the scene of sudden suspension failure of the test vehicle 20, and to test the response capability of the whole system under abnormal working conditions.

[0116] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspension and traction test device for a suspended magnetic levitation vehicle system, characterized in that: include: The track structure includes a mounting frame; the mounting frame is provided with a suspension rail and a traction rail extending in the longitudinal direction; a test vehicle having a non-suspended state in contact with a support surface below the mounting frame, and a suspended state in which the vehicle is detached from the support surface and suspended below the mounting frame; The test vehicle is provided with suspension electromagnets corresponding one-to-one to the suspension rails, and linear induction motors corresponding one-to-one to the traction rails; The suspension electromagnet is disposed opposite to the corresponding suspension rail, and is used to generate an electromagnetic attraction force to keep the test vehicle in the suspended state; the linear induction motor is disposed opposite to the corresponding traction rail, and is used to generate a traction force or a braking force acting on the test vehicle in the longitudinal direction; a data acquisition unit configured to acquire a first air gap parameter between the levitation electromagnet and the corresponding levitation rail, a second air gap parameter between the linear induction motor and the corresponding traction rail, and a first vibration parameter of the levitation electromagnet; The control unit is electrically connected to the linear induction motor and the suspension electromagnet, and the data acquisition unit is communicatively connected to the control unit.

2. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: The data acquisition unit is further configured to acquire a second vibration parameter of the test vehicle.

3. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 2, characterized in that: The data acquisition unit includes: a first vibration acceleration sensor, connected to the suspension electromagnet, for obtaining the first vibration parameter; A second vibration acceleration sensor is connected to the test vehicle and is used to obtain the second vibration parameter.

4. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: The data acquisition unit includes: a first laser displacement sensor, configured to obtain the first air gap parameter; the first laser displacement sensor is provided at both ends of the levitation electromagnet in the longitudinal direction; The second laser displacement sensor is used to obtain the second air gap parameter; the second laser displacement sensor is provided at both ends of the linear induction motor in the longitudinal direction.

5. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: The test vehicle is provided with rubber wheels, and the rubber wheels are configured to contact the support surface when the test vehicle is in the non-suspended state.

6. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: The control unit includes an operation console, a data acquisition instrument and a suspension controller provided on the test vehicle; The suspension controller is electrically connected to the suspension electromagnet, the linear induction motor is electrically connected to the operation console, the data acquisition unit is communicatively connected to the data acquisition instrument, and both the suspension controller and the data acquisition instrument are communicatively connected to the operation console.

7. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: The test vehicle is provided with a counterweight, and the weight of the counterweight is adjustable.

8. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 1, characterized in that: There are two suspension rails, and the two suspension rails are symmetrically distributed with the traction rail as the center; The mounting frame comprises: two longitudinal connecting portions, both extending in the longitudinal direction and spaced apart by a predetermined distance in the transverse direction; A plurality of transverse connecting parts are sequentially arranged along the longitudinal direction between the two longitudinal connecting parts; both ends of each transverse connecting part are connected to the two longitudinal connecting parts respectively; The two suspension rails are respectively installed at the bottom of the two longitudinal connecting parts; and the traction rail is connected to the bottom of the plurality of transverse connecting parts.

9. The suspension and traction test device of the suspended magnetic levitation vehicle system according to claim 8, characterized in that: The track structure further comprises a plurality of gate-shaped support beams; the plurality of support beams are sequentially arranged along the longitudinal direction; The crossbeam of each support beam is connected to the mounting frame, so that the mounting frame is supported on the supporting surface by a plurality of support beams.

10. A suspension and traction test method for a suspended magnetic levitation vehicle system, using the suspension and traction test device for a suspended magnetic levitation vehicle system according to any one of claims 1 to 9; characterized in that: The following steps are involved: Controlling the levitation electromagnet to start, so that the test vehicle switches from the non-levitation state to the levitation state; collecting the first air gap parameter and the first vibration parameter at this time as static levitation parameters, and sending them to the control unit; the control unit closed-loop regulating the current of the levitation electromagnet based on the static levitation parameters until the test vehicle is stably levitated; Controlling the linear induction motor to start, and the control unit adjusting the current magnitude and / or direction of the linear induction motor to cause the test vehicle to perform suspended motion along the longitudinal direction in different motion states; the motion states include accelerated motion, uniform motion, and decelerated motion; In each of the motion states, collecting the first air gap parameter and the first vibration parameter as dynamic suspension parameters, collecting the second air gap parameter as dynamic traction parameters, and sending the dynamic suspension parameters and the dynamic traction parameters to the control unit; Repeat the above steps under various working conditions with different loads of the test vehicles to obtain multiple sets of test parameters; the test parameters include the static suspension parameters, the dynamic suspension parameters and the dynamic traction parameters; and evaluate the performance of the suspended maglev vehicle system based on the multiple sets of test parameters.

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