System for simulating kinematic characteristics of coupled and uncoupled train

Abstract

The utility model relates to a kind of system of kinematic characteristics of simulation coupling and uncoupling train movement, including the first simulation equipment for carrying out coupling and uncoupling test, second simulation equipment, each simulation equipment includes simulation bridge, simulation controller, accelerometer signal generator and signal conditioning equipment;The signal conditioning equipment of first simulation equipment, simulation controller is connected with the two vehicle controllers of first train respectively, the signal conditioning equipment of second simulation equipment, simulation controller is connected with the two vehicle controllers of second train respectively;The simulation controller of two simulation equipment is mutually connected;Speed sensor signal generator is arranged in one of simulation equipment, and is connected with the signal conditioning equipment in two simulation equipment respectively.Compared with prior art, the speed sensor signal of two cooperative trains is generated by the same speed sensor signal generator in the utility model, and the accuracy of cooperative data and the change fidelity are improved.

Description

Technical Field

[0001] This utility model relates to the field of indoor simulation of rail transit trains, and in particular to a system for simulating the kinematic characteristics of coupled and decoupled trains. Background Technology

[0002] Online coupling of two small train sets into a single long train set, and online decoupling of a long train set into two small train sets, is a complex process for rail transit train operation control systems. To reduce the safety risks, testing time, and costs associated with on-site testing of coupling and decoupling functions by the train operation control system on the track, a simulation testing platform that simulates the coupling and decoupling process is needed in the laboratory.

[0003] The currently published simulation test platforms that include the train coupling and uncoupling process involve two simulated trains participating in coupling and uncoupling, each simulating the kinematic characteristics of its own train and exchanging information via network communication. Due to communication delays, it is difficult to ensure the accuracy and realism of the kinematic characteristics data during the simulation coupling process, the real-time switching of coupling states, and the coordination of the speed sensor signals transmitted by each simulated train in the coupled train group to its respective on-board controller.

[0004] Improving the accuracy, realism, real-time performance, and coordination of the kinematic characteristics of simulated coupled and decoupled trains remains a technical challenge. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a system for simulating the kinematic characteristics of coupled and decoupled trains, thereby improving the accuracy and realism of the data in the simulation system.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A system for simulating the kinematic characteristics of coupled and decoupled trains includes a first simulation device, a second simulation device, an onboard controller for the first train, and an onboard controller for the second train, all used for coupled and decoupled testing. Each simulation device includes a simulated driver's cab, a simulation controller, an accelerometer signal generator, and a signal conditioning device connected in sequence. Each train includes two onboard controllers. The signal conditioning device and simulation controller of the first simulation device are respectively connected to the two onboard controllers of the first train, and the signal conditioning device and simulation controller of the second simulation device are respectively connected to the two onboard controllers of the second train. The simulation controllers of the two simulation devices are interconnected. The system also includes a speed sensor signal generator, which is located in one of the simulation devices and is connected to the signal conditioning devices in both simulation devices.

[0008] Furthermore, the speed sensor signal generator includes a field-programmable gate array (FPGA) board.

[0009] Furthermore, the field-programmable gate array board includes at least four layers, including a dedicated signal layer, power layer, and ground layer.

[0010] Furthermore, the field-programmable gate array board includes a first signal layer, a complete ground plane, a power layer, and a second signal layer arranged sequentially.

[0011] Furthermore, the field-programmable gate array board has a hierarchical decoupling capacitor network on each power supply pin.

[0012] Furthermore, the speed sensor signal generator is connected to the signal conditioning devices in the two simulation devices via signal hardwire interfaces.

[0013] Furthermore, the accelerometer signal generator includes a high-speed analog output board.

[0014] Furthermore, the simulated driving platform includes a control panel.

[0015] Furthermore, the simulation controllers in each simulation device are connected to the simulation cab, the simulation controllers in each simulation device are connected to the two on-board controllers of their corresponding train, and the simulation controllers in two simulation devices are connected to each other via Ethernet interfaces.

[0016] Furthermore, the signal conditioning equipment of each simulation device is connected to the two on-board controllers of its corresponding train via hard-wired interfaces.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The two simulation devices use the same speed sensor signal generator to uniformly generate the speed sensor signals of the two coordinating trains, which improves the accuracy and realism of the coordinated data and ensures the coordination of the speed sensor signals transmitted by each coordinating train to its respective on-board controller.

[0019] 2. The vehicle controller and the simulation equipment, as well as the simulation driver's cab and the simulation controller, are connected via Ethernet communication. This has advantages such as high performance, high reliability, low cost, open standards, and strong compatibility. At the same time, it reduces the workload of transforming a non-connected decompression test environment into a connected decompression test environment and restoring it from a connected decompression test environment to a non-connected decompression test environment, thus improving the flexibility and scalability of the test.

[0020] 3. The speed sensor signal generator adopts a four-layer field-programmable gate array with the first signal layer, complete ground plane, power layer and second signal layer arranged in sequence. It can provide a low impedance return path, reduce electromagnetic radiation and loop inductance, and ensure the best signal quality.

[0021] 4. For the field-programmable gate array board that provides speed sensor signals, a hierarchical decoupling capacitor network is set up for each power supply pin. A combination of capacitors from large to small is arranged to form a "pyramid" decoupling. The large capacitors deal with low-frequency noise, while the small capacitors are close to the pins to provide high-frequency transient current, together maintaining power supply stability and ensuring signal integrity. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system structure for simulating the kinematic characteristics of coupled and decoupled trains in the embodiment.

[0023] Figure label:

[0024] 1-First train; 11-First onboard controller; 12-Second onboard controller; 2-Second train; 21-Third onboard controller; 22-Fourth onboard controller; 3-First simulation equipment; 31-First simulation driver's cab; 32-First simulation controller; 33-First accelerometer signal generator; 34-First signal conditioning equipment; 35-Speed ​​sensor signal generator; 4-Second simulation equipment; 41-Second simulation driver's cab; 42-Second simulation controller; 43-Second accelerometer signal generator; 44-Second signal conditioning equipment. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0026] To ensure that the kinematic characteristics (acceleration, velocity, displacement, etc.) of simulated coupled and disassembled trains in an indoor train simulation test platform are consistent with those of coupled and disassembled trains in actual rail transit operations in terms of accuracy, realism, real-time performance, and coordination, and possess controllability that is difficult to achieve in actual rail transit operations, this application proposes a system for simulating the kinematic characteristics of coupled and disassembled trains. The system includes a first simulation device 3, a second simulation device 4, an onboard controller for the first train 1, and an onboard controller for the second train 2, all used for coupled and disassembled testing. Each train includes two onboard controllers, and each simulation device includes a simulated driver's cab, a simulation controller, an accelerometer signal generator, and a signal conditioning device connected in sequence. The signal conditioning device and simulation controller of the first simulation device 3 are connected to the two onboard controllers of the first train 1, and the signal conditioning device and simulation controller of the second simulation device 4 are connected to the two onboard controllers of the second train 2. A speed sensor signal generator 35 is also included, located in one of the simulation devices, and is connected to the signal conditioning devices in both simulation devices. The two simulation devices generate speed sensor signals for the two coordinating trains using the same speed sensor signal generator 35, which improves the accuracy and realism of the coordinated data and ensures the coordination of the speed sensor signals transmitted by each coordinating train to its respective onboard controller.

[0027] like Figure 1 As shown, in this embodiment, the first train 1 includes a first onboard controller 11 and a second onboard controller 12, and the second train 2 includes a third onboard controller 21 and a fourth onboard controller 22. All onboard controllers are devices on actual trains. During operation, one of the onboard controllers in each train serves as the master onboard controller, used to control the operation of two trains in a coupled state, or to control the operation of its own train in a decoupled state. The onboard controller sends decoupled commands and other information to the simulation controller of the corresponding simulation device.

[0028] The first simulation device 3 includes a first simulation driver's cab 31, a first simulation controller 32, a first accelerometer signal generator 33, and a first signal conditioning device 34 connected in sequence. The second simulation device 4 includes a second simulation driver's cab 41, a second simulation controller 42, a second accelerometer signal generator 43, and a second signal conditioning device 44 connected in sequence. The first signal conditioning device 34 and the first simulation controller 32 of the first simulation device 3 are respectively connected to the two on-board controllers of the first train 1. The second signal conditioning device 44 and the second simulation controller 42 of the second simulation device 4 are respectively connected to the two on-board controllers of the second train 2, and the first simulation controller 32 and the second simulation controller 42 are interconnected. In this embodiment, a speed sensor signal generator 35 is disposed in the first simulation device 3, and the speed sensor signal generator 35 is respectively connected to the first signal conditioning device 34 and the second signal conditioning device 44.

[0029] In this embodiment, the speed sensor signal generator 35 includes a field-programmable gate array (FPGA) board, used to uniformly calculate kinematic characteristic data such as the running direction, acceleration rate, speed, displacement, number of speed sensor signal pulses, and speed sensor signal values ​​of the first train 1 and the second train 2, and generate the speed sensor signals required by the four sets of on-board controllers for the first train 1 and the second train 2. The speed sensor signal generator 35 allows the interval between two calculations to be at least less than one-quarter of the pulse period of the speed sensor signal when the train is at its maximum operating speed, ensuring that it can simulate two signals from the same speed sensor whose pulse periods differ by one-quarter (leading or lagging). The speed sensor signal generator 35 is connected to the signal conditioning devices in the two simulation devices through signal hard-wired interfaces, generating 8 sets of 16 digital level signals from the speed sensor. Each set of digital level output channels includes 2 digital level output channels, and every 2 sets of output channels are connected to one of the on-board controllers via the signal conditioning devices.

[0030] In a preferred embodiment, the FPGA board comprises at least four layers, including a dedicated signal layer, power layer, and ground layer. In this embodiment, the FPGA board includes a first signal layer, a complete ground plane, a power layer, and a second signal layer arranged sequentially. The first signal layer is flush with the complete ground plane below, providing a clear signal return path with low impedance, enabling stable, high-speed, and low-noise signal transmission. Timing- and noise-sensitive signals, such as high-speed clock signals, high-speed differential pairs, and speed sensor signals, are preferentially placed there. Above the second signal layer is the power layer, where signal integrity deteriorates; signals related to the power supply voltage are placed there, and cross-segmentation is avoided.

[0031] In some embodiments, the FPGA board has a hierarchical decoupling capacitor network on each power supply pin, which arranges a combination of capacitors from large to small to form a "pyramid" decoupling. The large capacitors deal with low-frequency noise, while the small capacitors are close to the pins to provide high-frequency transient current, together maintaining power supply stability and ensuring signal integrity.

[0032] The simulation controllers in each simulation device are used to calculate the desired direction and acceleration rate of the corresponding train, the train accelerometer signal value, the train position, train mechanical coupling processing information, and train mechanical decoupling processing information. The onboard controller sends decoupling commands and other information to the simulation controller, which in turn sends train coupling status information to the onboard controller. The simulation controllers of two simulation devices are interconnected to transmit information such as the desired direction, running direction, acceleration rate, speed, and displacement of their respective trains. The simulation controllers in each simulation device are connected to the simulation cab, to the two onboard controllers of their corresponding trains, and to each other via Ethernet interfaces, ensuring reliability while improving testing flexibility and scalability.

[0033] The accelerometer signal generator in each simulation device is used to generate the accelerometer signals required by the two sets of on-board controllers for the corresponding train. In this embodiment, the accelerometer signal generator includes a high-speed analog output board. The accelerometer signal generator is connected to the signal conditioning equipment through an analog voltage output interface, and the accelerometer signal generator is connected to the simulation controller through a data bus interface.

[0034] A simulation driver's cab is used to simulate the driver's cab of a train. It includes a control panel that provides information such as driving operation commands and obtains information such as the kinematic characteristics of the train from the simulation controller.

[0035] The signal conditioning equipment of each simulation device is used to convert and adapt the output signals of the accelerometer signal generator and the speed sensor signal generator 35 to the input signals of the two sets of on-board controllers of the train. The signal conditioning equipment of each simulation device is connected to the two on-board controllers of its corresponding train via hard-wired interfaces.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A system for simulating the kinematic characteristics of coupled and decoupled trains, characterized in that, The system includes a first simulation device, a second simulation device, an onboard controller for a first train, and an onboard controller for a second train, all used for coupling and uncoupling tests. Each simulation device includes a simulated driver's cab, a simulation controller, an accelerometer signal generator, and a signal conditioning device connected in sequence. Each train includes two onboard controllers. The signal conditioning device and simulation controller of the first simulation device are respectively connected to the two onboard controllers of the first train, and the signal conditioning device and simulation controller of the second simulation device are respectively connected to the two onboard controllers of the second train. The simulation controllers of the two simulation devices are interconnected. The system also includes a speed sensor signal generator, which is located in one of the simulation devices and is connected to the signal conditioning devices in both simulation devices.

2. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The speed sensor signal generator includes a field-programmable gate array (FPGA) board.

3. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 2, characterized in that, The field-programmable gate array board includes at least four layers, including a dedicated signal layer, power layer, and ground layer.

4. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 3, characterized in that, The field-programmable gate array board includes a first signal layer, a complete ground plane, a power layer, and a second signal layer arranged in sequence.

5. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 2, characterized in that, The field-programmable gate array board has a layered decoupling capacitor network on each power pin.

6. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The speed sensor signal generator is connected to the signal conditioning devices in the two simulation devices via signal hardwire interfaces.

7. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The accelerometer signal generator includes a high-speed analog output board.

8. The system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The simulated driving platform includes a control panel.

9. A system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The simulation controllers in each simulation device are connected to the simulation cab, the simulation controllers in each simulation device are connected to the two on-board controllers of their corresponding train, and the simulation controllers in two simulation devices are connected to each other via Ethernet interfaces.

10. A system for simulating the kinematic characteristics of coupled and decoupled trains according to claim 1, characterized in that, The signal conditioning equipment of each simulation device is connected to the two on-board controllers of its corresponding train via hard-wired interfaces.

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