MVB bus terminating device and train network control system

Abstract

The invention relates to the technical field of train terminating devices, and provides an MVB bus terminating device and a train network control system.The MVB bus terminating device comprises an outer shell, the outer surface of the outer shell is detachably connected with an insertion port, the outer surface of one end of the outer shell is provided with a filtering structure, and the surface of the other end of the outer shell is connected with an adjusting structure; the filtering structure comprises a fan shell arranged on the inner side of the outer shell and close to the air inlet, a fan support is fixedly connected to the inner side surface of the fan shell, a rotary fan is rotationally connected to the surface of one side of the fan support, and a concave groove is formed in the surface of the other side of the fan support. Protruding blocks are detachably connected to the positions, corresponding to the interiors of the concave grooves, of the outer surface of the fan support, and elastic strips are fixedly connected to the outer side surfaces of the protruding blocks. According to the technical scheme, the problems that an existing MVB terminating device needs to be cooled in the using process, a cooling opening is not provided with a filtering structure, and internal components are prone to being damaged in advance for a long time are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of train termination devices, and in particular to an MVB bus termination device and a train network control system. Background Art

[0002] The MVB bus termination device and train network control system are a termination structure used in trains and a network control system used to control the train, which can make the train run more stably and efficiently;

[0003] After searching, the MVB bus termination device and train network control system with the authorization announcement number CN110979395B are found. The train-level marshaling units of the train network control system are cross-connected through the MVB bus termination device. After adding the MVB bus termination device, the train's unmarshaling and coupling does not require any operation on the original vehicle cables or connectors. It only needs to plug the fourth connector into the first connector to restore the normal function of the network system, reduce the probability of system errors, and greatly shorten the time for rapid recovery of network functions after unmarshaling and coupling, with low cost and high efficiency.

[0004] However, the above-mentioned existing MVB bus termination device needs to dissipate heat during use, but the heat dissipation opening has no filtering structure. In the long run, it is easy to cause premature damage to internal components. For this reason, we propose an MVB bus termination device and a train network control system. Summary of the invention

[0005] The present invention proposes an MVB bus termination device and a train network control system, which solves the problem mentioned in the background technology that the existing MVB bus termination device needs to dissipate heat during use, but the heat dissipation opening has no filtering structure, which may easily cause premature damage to internal components in the long run.

[0006] The technical solution of the present invention is as follows:

[0007] An MVB bus termination device comprises an outer shell, the outer surface of which is detachably connected with a plug interface, an outer surface of one end of which is provided with a filtering structure, and the other end of which is connected with an adjusting structure;

[0008] The filtering structure includes a fan housing disposed near the air inlet on the inner side of the housing body. A fan bracket is fixedly connected to the inner surface of the fan housing. A rotating fan is rotatably connected to one side surface of the fan bracket. A recessed groove is formed on the other side surface of the fan bracket. A convex block is detachably connected to the outer surface of the fan bracket corresponding to the recessed groove. An elastic strip is fixedly connected to the outer side surface of the convex block. An adapter plate is fixedly connected to the outer surface of the convex block. A filter screen is fixedly connected to the outer surface of the adapter plate. A cleaning assembly is disposed between the housing body and the fan housing, and the cleaning assembly is used for cleaning the surface of the filter screen.

[0009] As a further technical solution of the present invention, the cleaning assembly includes a chute formed between the fan housing and the housing body. An outer ring body is fixedly connected to the outer surface of the outer blades of the rotating fan. A first magnetic block is fixedly connected to the outer surface of the outer ring body. A rotating ring is rotatably connected to the inner side of the chute between the fan housing and the housing body. A second magnetic block is fixedly connected to the outer surface of the rotating ring. A ring-shaped portion is fixedly connected to the outer side surface of the rotating ring. A rotating rod is movably connected to the inner surface of the ring-shaped portion by a screw. A brush is fixedly connected to the inner side of the rotating rod. A cover is fixedly connected to the outer surface of the housing body near the ring-shaped portion. A connecting plate is fixedly connected to the surface of the housing body. An internal component is disposed inside the housing body.

[0010] As a further technical solution of the present invention, the adjusting structure includes a guiding frame fixedly connected to the inner wall surface of the housing body. A sliding plate is slidably connected to the inside of the guiding frame. An air outlet hole is formed on the end surface of the sliding plate. Reinforcing holes are formed at both the upper and lower ends of the sliding plate. First plates are fixedly connected to both ends of the sliding plate near the rear side. Second plates are fixedly connected to both ends of the guiding frame near the rear side. An adjusting spring is connected between the second plate and the first plate.

[0011] As a further technical solution of the present invention, the fan housing is fixedly connected to the housing body by screws. The diameter of the recessed groove is larger than the diameter of the convex block. The elastic strip is a long semi-cylindrical structure, and the radius of the elastic strip is larger than the difference between the diameter of the recessed groove and the diameter of the convex block.

[0012] As a further technical solution of the present invention, the elastic strip is made of elastic rubber material. The filter screen is used for filtering impurities in the air blown from the housing body into the interior of the housing body. The outer diameter of the adapter plate matches the inner diameter of the fan housing. The number of filter screens is several groups and is distributed in a circular array.

[0013] As a further technical solution of the present invention, the rotating ring rotates along the circular direction of the chute. The number of both the second magnetic blocks and the first magnetic blocks is several groups and is distributed in a circular array. The second magnetic blocks and the first magnetic blocks are magnetically connected to each other.

[0014] As a further technical solution of the present invention, the annular part penetrates through the fan housing and the housing body to the outside of the housing body. The rotation of the first magnetic block at a low speed drives the second magnetic block to rotate synchronously with the rotating ring, and the rotating ring is rotatably connected to the housing body through a bearing.

[0015] As a further technical solution of the present invention, the rotating rod is located at the middle position inside the annular part. The brush bristles are of a soft hair structure, and the brush bristles are used to scrape off dust agents and foreign matters on the outer surface of the brush bristles.

[0016] As a further technical solution of the present invention, the rotation of the rotating fan blows to move the sliding plate, so that the sliding plate moves outward away from the guiding frame, realizing the adjustment of the size of the ventilation opening inside and outside the housing body. The pulling of the adjusting spring realizes the reset adjustment of the position of the sliding plate.

[0017] A train network control system, the control system includes a scheduling optimization module, an optimal control module and a scheduling cooperation module. The scheduling optimization module, the optimal control module and the scheduling cooperation module are all signal-connected to each other; wherein:

[0018] 1) The scheduling optimization module is used to calculate the distribution of its respective cycle variables in the basic cycle for different optimization methods, and satisfy that the sum of the cycle variable times in each basic cycle does not exceed the basic cycle, and calculate according to the following formula:

[0019]

[0020] Among them, for a certain MVB network segment, there are m repeaters, the delay brought by them is Trepeater, the processing delay of the node is Tproc, the length of the physical medium for information transmission is L, and the signal delay caused by the electrical line per unit length is Tele. Then the necessary and sufficient condition for the schedulability of the MVB network cycle polling table is the above formula; specifically, Tpd is the basic cycle, the M-cycle information set, λ i represents the i-th basic cycle, Cλ i , pi represents the message length occupied by the cycle variable p in the basic cycle;

[0021] Based on Formula 1, for different optimization methods, calculate the distribution of their respective cycle variables in the basic cycle, and satisfy that the sum of the cycle variable times in each basic cycle does not exceed the basic cycle;

[0022] 2) The optimal control module is used to transform the system by the state vector augmentation method, find the optimal control input sequence, and ensure the controllability of the system. The calculation formula is as follows:

[0023]

[0024] Where K(k) is the optimal control gain sequence, It is a linear state feedback optimal control sequence; with the purpose of formula 2, for networked control systems with medium access constraints and induced delays, an optimal controller based on optimal control theory is designed to ensure the stability, reliability and superiority of the system;

[0025] 3) The scheduling coordination module is used to optimize the sampling period by comprehensively considering the control and network scheduling indicators. Obtaining the optimal sampling period is the key to ensuring the performance of the control and scheduling collaborative design. Usually, for a network control system with a network delay of τ, the sampling period range is:

[0026]

[0027] Among them, T w The control system bandwidth ω w It is obtained according to formula 1 and the basic period Tbp and characteristic period T of the MVB network control system. ip Based on the information, we construct an optimization objective function, whose optimization variables are the optimal sampling period and the initial phase Φ i ; According to the objective function form, the optimal sampling period and initial phase can be obtained by using the corresponding algorithm to find the optimal solution.

[0028] The working principle and beneficial effects of the present invention are:

[0029] In the present invention, the filtering structure can be used to filter the air entering the outer shell for heat dissipation, thereby preventing external dust or small foreign matter from mixing into the inner part of the outer shell when in use. At the same time, the dust or foreign matter on the surface of the filtered filter can be scraped off during use, without the need for frequent manual cleaning of the filter, which can achieve good use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Figure 1 It is a structural schematic diagram of the MVB bus termination device of the present invention;

[0032] Figure 2 For the present invention Figure 1 Schematic diagram of the local structure from another perspective;

[0033] Figure 3 It is a schematic diagram of the local structure of the present invention 1 cut away from another viewing angle;

[0034] Figure 4 It is a schematic diagram of the partial structure of the disassembled filtering structure of the present invention;

[0035] Figure 5 It is a partial structural schematic diagram for the disassembly and installation of the connection plate of the present invention;

[0036] Figure 6 It is a partial structural schematic diagram of the back surface of the connection plate of the present invention;

[0037] Figure 7 It is a partial structural schematic diagram of the present invention with the rotating ring sectioned;

[0038] Figure 8 It is a partial structural schematic diagram of the present invention sectioned near the annular part;

[0039] Figure 9 It is a partial structural schematic diagram of the present invention sectioned at the adjustment structure.

[0040] In the figure: 1. Outer housing; 2. Insertion interface; 3. Filter structure; 30. Protective cover; 31. Fan housing; 32. Fan bracket; 33. Rotating fan; 34. Concave groove; 35. Connection plate; 36. Filter net; 37. Convex block; 38. Elastic strip; 39. Slide groove; 310. Outer ring body; 311. First magnetic block; 312. Rotating ring; 313. Second magnetic block; 314. Annular part; 315. Rotating rod; 316. Brush hair; 4. Adjustment structure; 41. Guide frame; 42. Slide plate; 43. Air outlet hole; 44. Reinforcement hole; 45. First plate; 46. Second plate; 47. Adjustment spring; 5. Connection plate; 6. Internal components. Detailed implementation manners

[0041] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] As Figures 1 to 8 shown, this embodiment proposes an MVB bus termination device, including an outer housing 1, an insertion interface 2 detachably connected to the outer surface of the outer housing 1, a filter structure 3 provided on one end outer surface of the outer housing 1, and an adjustment structure 4 connected to the other end surface of the outer housing 1;

[0044] The filtering structure 3 includes a fan housing 31 disposed inside the outer housing 1 near the air inlet. A fan bracket 32 is fixedly connected to the inner surface of the fan housing 31. A rotary fan 33 is rotatably connected to one side surface of the fan bracket 32. A recessed groove 34 is formed on the other side surface of the fan bracket 32. A convex block 37 is detachably connected to the outer surface of the fan bracket 32 corresponding to the recessed groove 34. An elastic strip 38 is fixedly connected to the outer surface of the convex block 37. An adapter plate 35 is fixedly connected to the outer surface of the convex block 37. A filter screen 36 is fixedly connected to the outer surface of the adapter plate 35. A cleaning component is disposed between the outer housing 1 and the fan housing 31, and the cleaning component is used to clean the surface of the filter screen 36.

[0045] The cleaning component includes a sliding groove 39 formed between the fan housing 31 and the outer housing 1. An outer ring body 310 is fixedly connected to the outer surface of the outer blade of the rotary fan 33. A first magnetic block 311 is fixedly connected to the outer surface of the outer ring body 310. A rotating ring 312 is rotatably connected to the inner side of the sliding groove 39 between the fan housing 31 and the outer housing 1. A second magnetic block 313 is fixedly connected to the outer surface of the rotating ring 312. A ring portion 314 is fixedly connected to the outer surface of the rotating ring 312. A rotating rod 315 is movably connected to the inner surface of the ring portion 314 by a screw. A brush hair 316 is fixedly connected to the inner side of the rotating rod 315. A protective cover 30 is fixedly connected to the outer surface of the outer housing 1 near the ring portion 314. A connecting plate 5 is fixedly connected to the surface of the outer housing 1. An internal component 6 is disposed inside the outer housing 1.

[0046] The fan housing 31 is fixedly connected to the outer housing 1 by screws. The diameter of the recessed groove 34 is larger than the diameter of the convex block 37. The elastic strip 38 is a long semi-cylindrical structure, and the radius of the elastic strip 38 is larger than the difference between the diameter of the recessed groove 34 and the diameter of the convex block 37; the elastic strip 38 is made of elastic rubber material. The filter screen 36 is used to filter impurities in the air blown into the interior of the outer housing 1 from the outer housing 1. The outer diameter of the adapter plate 35 matches the inner diameter of the fan housing 31. The number of the filter screens 36 is several groups and they are distributed in a circular array.

[0047] The rotating ring 312 rotates along the circumferential direction of the sliding groove 39. The number of both the second magnetic blocks 313 and the first magnetic blocks 311 is several groups and they are both distributed in a circular array. The second magnetic blocks 313 and the first magnetic blocks 311 are magnetically connected; the ring portion 314 penetrates through the fan housing 31 and the outer housing 1 to the outside of the outer housing 1. The second magnetic blocks 313 are driven to rotate synchronously with the rotating ring 312 by the low-speed rotation of the first magnetic blocks 311. The rotating ring 312 is rotatably connected to the outer housing 1 through a bearing; the rotating rod 315 is located at the middle position inside the ring portion 314. The brush hair 316 is a soft hair structure, and the brush hair 316 is used to scrape off dust agents and foreign matters on the outer surface of the brush hair 316.

[0048] In this embodiment, the air entering the inside of the outer casing 1 for heat dissipation can be filtered, so as to prevent external dust or small foreign objects from mixing into the inside of the outer casing 1 when used in a large area. At the same time, during the use process, the dust or foreign objects on the surface of the filter screen 36 can be scraped off, eliminating the need for frequent manual cleaning of the filter screen 36 and achieving a good usage effect.

[0049] Embodiment 2

[0050] As Figure 9 shown, on the basis of Embodiment 1, an adjustment structure 4 is further proposed, which includes a guiding frame 41 fixedly connected to the inner wall surface of the outer casing 1. A sliding plate 42 is slidably connected to the inside of the guiding frame 41. Air outlet holes 43 are formed on the end surface of the sliding plate 42. Reinforcement holes 44 are formed at both the upper and lower ends of the sliding plate 42. First plates 45 are fixedly connected to both ends of the sliding plate 42 near the rear side. Second plates 46 are fixedly connected to both ends of the guiding frame 41 near the rear side. An adjustment spring 47 is connected between the second plate 46 and the first plate 45.

[0051] By rotating the fan 33 to blow and move the sliding plate 42, the sliding plate 42 moves outward away from the guiding frame 41, realizing the adjustment of the size of the ventilation opening between the inside and outside of the outer casing 1. The position of the sliding plate 42 is reset and adjusted by the pulling of the adjustment spring 47.

[0052] In this embodiment, during the use process, during the ventilation and heat dissipation process, according to the size of the air volume blown out by the rotating fan 33, the size of the opening of the reinforcement hole 44 on the surface of the sliding plate 42 communicating with the inside and outside of the outer casing 1 can be automatically adjusted, thus achieving an adaptive adjustment effect and a better heat dissipation effect.

[0053] A train network control system, the control system includes a scheduling optimization module, an optimal control module, and a scheduling coordination module. The scheduling optimization module, the optimal control module, and the scheduling coordination module are all signal-connected to each other; where:

[0054] 1) The scheduling optimization module is used to calculate the distribution of each cycle variable in the basic cycle for different optimization methods, and ensure that the sum of the cycle variable times in each basic cycle does not exceed the basic cycle. The calculation is based on the following formula:

[0055]

[0056] Among them, for a certain MVB network segment, if there are m repeaters, the delay caused is Trepeater, the processing delay of the node is Tproc, the length of the physical medium for information transmission is L, and the signal delay caused by the unit length of the electrical line is Tele, then the necessary and sufficient condition for the schedulability of the MVB network cycle polling table is the above formula; specifically, Tpd is the basic cycle, M is the cycle information set, λi represents the i-th basic period, Cλ i , pi represents the message length that the periodic variable p occupies in the basic period;

[0057] Based on Formula 1, for different optimization methods, calculate the distribution of each periodic variable in the basic period, and ensure that the maximum value of the sum of the times of the periodic variables within each basic period is not greater than the basic period;

[0058] 2) The optimal control module is used to transform the system through the state vector augmentation method, find the optimal control input sequence, and ensure the controllability of the system. The calculation formula is as follows:

[0059]

[0060] where K(k) is the optimal control gain sequence, is the linear state feedback optimal control sequence; aiming at Formula 2, for a networked control system with medium access constraints and induced time delays, design an optimal controller based on the optimal control theory to ensure the stability, reliability, and superiority of the system;

[0061] 3) The scheduling coordination module is used to optimize the sampling period by comprehensively considering the two aspects of control and network scheduling indicators. Therefore, obtaining the optimal sampling period is the key to ensuring the performance of the collaborative design of control and scheduling; Generally, for a networked control system with a network delay of τ, its sampling period range is:

[0062]

[0063] where T w can be obtained from the control system bandwidth ω w derived from Formula 1 and the basic period Tbp and characteristic period T of the MVB network control system ip and other information, construct an optimization objective function with the optimization variables being the optimal sampling period and the initial phase Φ i ; According to the form of the objective function, adopt the corresponding algorithm to find its optimal solution to obtain the optimal sampling period and the initial phase.

[0064] In summary, the usage principle of the present invention is specifically as follows:

[0065] During use, the rotation of the rotary fan 33 sucks the air outside the outer casing 1 into the inside of the outer casing 1 and blows it out from the air outlet hole 43 on the other side, thereby dissipating heat;

[0066] During the heat dissipation process, the inhaled air can be filtered through the filter screen 36, which can effectively prevent external dust or foreign objects from being inhaled into the interior of the outer casing 1 through the air inlet opening. With the elastic setting of the elastic strip 38, the bump 37 can be kept stable after being inserted into the recessed groove 34. At the same time, the separable structure of the bump 37 and the fan bracket 32 facilitates the disassembly and installation of the filter screen 36, the connection plate 35, together with the bump 37 and the elastic strip 38 after a certain period of use;

[0067] When automatic cleaning of the surface of the filter screen 36 is required, the rotary fan 33 can be rotated to run at a low speed. Under low-speed operation, the outer ring body 310 and the first magnetic block 311 rotate together. The second magnetic block 313 is attracted by the magnetic force of the first magnetic block 311, so that the rotating ring 312 and the annular part 314 rotate synchronously with the rotation of the rotary fan 33. The rotating annular part 314 drives the rotating rod 315 to rotate, and the rotating rod 315 can make the brush bristles 316 clean the surface of the filter screen 36, achieving the effect of automatically cleaning the surface of the filter screen 36. It should be noted that when the rotary fan 33 rotates at a high speed, the first magnetic block 311 does not attract the second magnetic block 313 to drive it to rotate together with the rotating ring 312;

[0068] During use, according to the magnitude of the rotating wind force of the rotary fan 33, under the condition of high-speed rotation of the rotary fan 33 and large wind-force heat dissipation, the wind will directly blow outwards from the air outlet hole 43. At the same time, the wind force will blow the sliding plate 42 to move a certain distance towards the outside of the guiding frame 41. At this time, the adjusting spring 47 between the first plate 45 and the second plate 46 will be stretched to the maximum, and the strengthening hole 44 moving outwards will increase the opening distance of the strengthening hole 44, which is the communication opening between the inside and outside of the outer casing 1, achieving the purpose of rapid heat dissipation. At the same time, under medium wind force, the communication opening between the strengthening hole 44 and the inside and outside of the outer casing 1 becomes smaller, and under low wind force, the communication opening between the strengthening hole 44 and the inside and outside of the outer casing 1 is the smallest. Thus, during use, the size of the heat dissipation opening of the outer casing 1 can be automatically adjusted according to the magnitude of the wind force blown by the rotary fan 33, effectively improving the heat dissipation effect.

[0069] It should be noted that through the setting of the network system in the present invention, the problems of poor real-time performance of the existing algorithm, difficulty in meeting the schedulability requirements, resulting in the destruction of the real-time performance of periodic data and the reduction of network performance can be solved. At the same time, the problems of medium access constraints and induced time delay existing in the existing networked control system, and the complexity of system separation and integration can be solved, which can bring better use effects.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A kind of MVB bus termination device, including a housing (1), characterized in that, A plug interface (2) is detachably connected to the outer surface of the outer shell (1). A filtering structure (3) is arranged on the outer surface of one end of the outer shell (1), and an adjusting structure (4) is connected to the surface of the other end of the outer shell (1). The filtering structure (3) includes a fan housing (31) arranged inside the outer shell (1) near the air inlet. A fan bracket (32) is fixedly connected to the inner surface of the fan housing (31). A rotary fan (33) is rotatably connected to one side surface of the fan bracket (32). A recessed groove (34) is formed on the other side surface of the fan bracket (32). A convex block (37) is detachably connected to the outer surface of the fan bracket (32) corresponding to the recessed groove (34). An elastic strip (38) is fixedly connected to the outer side surface of the convex block (37). An adapter plate (35) is fixedly connected to the outer surface of the convex block (37). A filter net (36) is fixedly connected to the outer surface of the adapter plate (35). A cleaning component is arranged between the outer shell (1) and the fan housing (31), and the cleaning component is used for cleaning the surface of the filter net (36).

2. The MVB bus termination device according to claim 1, wherein, The cleaning component includes a sliding groove (39) formed between the fan housing (31) and the outer shell (1). An outer ring body (310) is fixedly connected to the outer surface of the outer blade of the rotary fan (33). A first magnetic block (311) is fixedly connected to the outer surface of the outer ring body (310). A rotating ring (312) is rotatably connected to the inner side of the sliding groove (39) between the fan housing (31) and the outer shell (1). A second magnetic block (313) is fixedly connected to the outer surface of the rotating ring (312). A ring-shaped part (314) is fixedly connected to the outer side surface of the rotating ring (312). A rotating rod (315) is movably connected to the inner surface of the ring-shaped part (314) by screws. A brush (316) is fixedly connected to the inner side of the rotating rod (315). A protective cover (30) is fixedly connected to the outer surface of the outer shell (1) near the ring-shaped part (314). A connecting plate (5) is fixedly connected to the surface of the outer shell (1), and an internal component (6) is arranged inside the outer shell (1).

3. The MVB bus termination device according to claim 1, characterized in that, The adjusting structure (4) includes a guiding frame (41) fixedly connected to the inner wall surface of the outer shell (1). A sliding plate (42) is slidably connected to the inside of the guiding frame (41). An air outlet hole (43) is formed on the end surface of the sliding plate (42). Reinforcing holes (44) are formed at both the upper and lower ends of the sliding plate (42). First plates (45) are fixedly connected to both ends of the sliding plate (42) near the rear side. Second plates (46) are fixedly connected to both ends of the guiding frame (41) near the rear side. An adjusting spring (47) is connected between the second plates (46) and the first plates (45).

4. The MVB bus termination device according to claim 1, characterized in that, The fan housing (31) is fixedly connected to the housing body (1) by screws. The diameter of the recessed groove (34) is larger than the diameter of the convex block (37). The elastic strip (38) is a long semi-cylindrical structure, and the radius of the elastic strip (38) is larger than the difference between the diameter of the recessed groove (34) and the diameter of the convex block (37).

5. The MVB bus termination device according to claim 4, wherein The elastic strip (38) is made of elastic rubber material. The filter screen (36) is used to filter impurities in the air blown into the interior of the housing body (1) from the housing body (1). The outer diameter of the connecting plate (35) matches the inner diameter of the fan housing (31). The number of the filter screens (36) is several groups and they are distributed in a circular array.

6. The MVB bus termination device according to claim 2, wherein, The rotating ring (312) rotates along the circumferential direction of the sliding groove (39). The number of the second magnetic blocks (313) and the first magnetic blocks (311) is several groups and they are both distributed in a circular array. The second magnetic blocks (313) and the first magnetic blocks (311) are magnetically connected to each other.

7. The MVB bus termination device according to claim 6, characterized in that The annular part (314) penetrates through the fan housing (31) and the housing body (1) to the outside of the housing body (1). The low-speed rotation of the first magnetic blocks (311) drives the second magnetic blocks (313) to rotate synchronously with the rotating ring (312). The rotating ring (312) is rotatably connected to the housing body (1) through a bearing.

8. The MVB bus termination device according to claim 7, characterized in that, The rotating rod (315) is located at the middle position inside the annular part (314). The brush hair (316) is a soft hair structure. The brush hair (316) is used to scrape off dust agents and foreign matters on the outer surface of the brush hair (316).

9. The MVB bus termination device according to claim 3, characterized in that, The rotation of the rotary fan (33) blows to move the sliding plate (42) outward away from the guide frame (41), realizing the adjustment of the size of the ventilation opening inside and outside the housing body (1). The pulling of the adjusting spring (47) realizes the reset adjustment of the position of the sliding plate (42).

10. A train network control system is applied to the MVB bus termination device according to any one of claims 1-9, and is characterized in that The control system includes a scheduling optimization module, an optimal control module and a scheduling coordination module. The scheduling optimization module, the optimal control module and the scheduling coordination module are all signal-connected to each other; where: 1) The scheduling optimization module is used to calculate the distribution of its respective cycle variables in the basic cycle for different optimization methods, and ensure that the sum of the cycle variable times in each basic cycle does not exceed the basic cycle, and is calculated according to the following formula: Among them, for a certain MVB network segment, there are m repeaters, the delay brought by them is Trepeater, the processing delay of the node is Tproc, the length of the physical medium for information transmission is L, and the signal delay caused by the electrical line per unit length is Tele. Then the necessary and sufficient condition for the schedulability of the MVB network cycle polling table is the above formula. Specifically, Tpd is the basic period, the M-period information set, λ i represents the i-th basic period, Cλ i , pi represents the message length that the cycle variable p occupies in the basic period; Based on Formula 1, for different optimization methods, calculate the distribution of its respective cycle variables in the basic cycle, and ensure that the sum of the cycle variable times in each basic cycle does not exceed the basic cycle; 2) The optimal control module is used to transform the system by the state vector augmentation method to find the optimal control input sequence to ensure the controllability of the system. The calculation formula is as follows: where, K(k) is the optimal control gain sequence, is the optimal control sequence of linear state feedback; for the purpose of Formula 2, an optimal controller based on the optimal control theory is designed for the networked control system with medium access constraints and induced time delays to ensure the stability, reliability and superiority of the system; 3) The scheduling coordination module is used to optimize the sampling period by comprehensively considering the indexes of both control and network scheduling. Therefore, obtaining the optimal sampling period is the key to ensuring the performance of the coordinated design of control and scheduling; Generally, for a network control system with a network delay of τ, the range of its sampling period is: Among them, T w can be obtained from the control system bandwidth ω w and is based on Formula 1, the basic cycle Tbp and the characteristic cycle T of the MVB network control system ip and other information to construct an optimization objective function with the optimization variables being the optimal sampling period and the initial phase Φ i ; The corresponding algorithm can be used according to the form of the objective function to find its optimal solution, and then the optimal sampling period and the initial phase can be obtained.

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