A dual redundant system and generation method for aircraft telemetry PCM data stream

Abstract

The present invention discloses a dual redundant system and generation method for aircraft telemetry PCM data stream, comprising: when the master data integrator is in normal working state: the master data integrator sends a data scheduling instruction to a data collection and editing unit through a bus and a switch; the successfully matched data collection and editing unit responds to the data scheduling instruction and sends the collected data to the master data integrator through the switch and the bus; the master data integrator generates a serial telemetry PCM data stream; the backup data integrator monitors the collected data sent by the data collection and editing unit through the switch and the bus in real time; when the master data integrator is not working normally: the backup data integrator sends a data scheduling instruction; the switch shields the master data integrator; the successfully matched data collection and editing unit responds to the data scheduling instruction and sends the collected data to the backup data integrator through the switch and the bus; the backup data integrator generates a serial telemetry PCM data stream. The present invention can avoid the failure of telemetry tasks caused by the loss of telemetry data.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft telemetry system framing information transmission, and in particular relates to an aircraft telemetry PCM data stream dual redundancy system and a generation method. Background Art

[0002] At present, most telemetry systems adopt a centralized distributed design scheme that collects data in distributed sections and then integrates the data collection and editing units of each section. The data integrator is the total aggregation node of telemetry data and the total dispatching unit for data collection by the data collection and editing units of each section. After data dispatching and data integration framing by the data integrator, a telemetry PCM (pulse code modulation) data stream can be finally formed and sent to the transmitting equipment or solid storage equipment. In the development of telemetry system technology over the years, a variety of redundant backup means such as space-based measurement and control, multi-point frequency telemetry transmission, and solid-state storage have been formed, which greatly improves the reliability of data acquisition in the telemetry system. However, the above redundant backup technical means are mostly concentrated in the back-end transmission process of the telemetry PCM data stream. For the telemetry PCM data stream itself, there is still a lack of redundant backup means. If a single point of telemetry PCM data stream fails, it will lead to the loss of telemetry data, which will directly affect the success or failure of the telemetry mission. Therefore, it is very necessary to carry out the dual redundant design of telemetry PCM data stream of the aircraft measurement and control communication system. Summary of the invention

[0003] The purpose of the present invention is to overcome the above defects and provide an aircraft telemetry PCM data stream dual redundancy system and generation method, which solves the technical problem that the traditional telemetry system cannot realize the telemetry PCM data stream redundancy protection. The present invention can avoid the failure of telemetry missions caused by the loss of telemetry data.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] An aircraft telemetry PCM data stream dual-redundancy system, comprising:

[0006] Main data integrator, backup data integrator, switch, bus and data acquisition and editing unit;

[0007] When the master data integrator is in normal working state:

[0008] The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch;

[0009] There are N data acquisition and editing units, each of which receives the data scheduling instruction input by the master data integrator and matches it with the data scheduling instruction. The successfully matched data acquisition and editing unit responds to the data scheduling instruction and sends the collected data to the master data integrator through the switch and the bus, N>1;

[0010] The master data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream;

[0011] The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, performs comprehensive framing on the collected data, and generates a serial telemetry PCM data stream;

[0012] When the master data integrator does not work properly:

[0013] The backup data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; the switch shields the primary data integrator;

[0014] Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit responds to the data scheduling instruction and sends the collected data to the backup data integrator through the switch and the bus;

[0015] The backup data integrator receives the collected data, performs integrated framing on the collected data, and generates a serial telemetry PCM data stream.

[0016] Furthermore, the number of switches is 2, including one main switch and one standby switch; the number of buses is 2, wherein the bus corresponding to the main switch is referred to as a first bus, and the bus corresponding to the standby switch is referred to as a second bus;

[0017] When the master data integrator works normally:

[0018] The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the first bus and the main switch, and sends data scheduling instructions to the data acquisition and editing unit through the second bus and the standby switch;

[0019] There are N data acquisition and editing units, each of which receives a data scheduling instruction input by the primary data integrator and matches the data scheduling instruction. The successfully matched data acquisition and editing unit sends the primary acquisition data to the primary data integrator through the primary switch and the first bus, and sends the backup acquisition data to the primary data integrator through the backup switch and the second bus, N>1;

[0020] The master-slave data synthesizer receives the main acquisition data and the backup acquisition data. When the main acquisition data is normal, it frames the main acquisition data. When the main acquisition data is abnormal, it frames the backup acquisition data to generate a serial telemetry PCM data stream.

[0021] The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, frames the collected data, and generates a serial telemetry PCM data stream;

[0022] When the master data integrator does not work properly:

[0023] The backup data integrator sends data scheduling instructions to the data collection and editing unit through the first bus and the main switch, and sends data scheduling instructions to the data collection and editing unit group through the second bus and the backup switch; the main switch and the backup switch shield the main data integrator;

[0024] Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit sends the main collection data to the backup data integrator through the main switch and the first bus, and sends the backup collection data to the backup data integrator through the backup switch and the second bus.

[0025] The backup data integrator receives the main acquisition data and the backup acquisition data. When the main acquisition data is normal, it frames the main acquisition data. When the main acquisition data is abnormal, it frames the backup acquisition data to generate a serial telemetry PCM data stream.

[0026] Furthermore, when the master data integrator works normally, the master data integrator also sends time primitive synchronization information to the data acquisition and editing unit through the bus and the switch;

[0027] When the main data integrator does not work properly, the backup data integrator also sends time primitive synchronization information to the data acquisition and editing unit through the bus and the switch;

[0028] The data collection and editing unit performs corresponding operations at a preset time according to the time primitive synchronization information.

[0029] Furthermore, the primary data integrator sends a frame synchronization signal and a clock synchronization signal to the backup data integrator in real time. When the backup data integrator can detect the frame synchronization signal and the clock synchronization signal, it is in a normal working state of the primary data integrator, and the backup data integrator does not send data scheduling instructions; when the backup data integrator cannot receive the frame synchronization signal and the clock synchronization signal, it is in an abnormal working state of the primary data integrator, and the backup data integrator actively sends data scheduling instructions.

[0030] Furthermore, the condition for the switch to shield the primary data integrator is that the switch receives a data scheduling instruction from the backup data integrator.

[0031] Furthermore, after receiving the collected data, the primary data integrator or the backup data integrator filters the collected data to obtain the real collected data.

[0032] Furthermore, an FC-AE-1553 optical fiber bus network architecture is adopted.

[0033] Furthermore, the master data integrator serves as the NC node of the FC-AE-1553 fiber optic bus network architecture, and the data acquisition and editing unit serves as the NT node of the FC-AE-1553 fiber optic bus network architecture; when the master data integrator is in normal working state, the backup data integrator serves as the NM node of the FC-AE-1553 fiber optic bus network architecture, and when the master data integrator is in abnormal working state, the backup data integrator switches to the NC node of the FC-AE-1553 fiber optic bus network architecture.

[0034] A method for generating aircraft telemetry PCM data stream, implemented by the above-mentioned aircraft telemetry PCM data stream dual redundant system, comprises:

[0035] When the master data integrator is in normal working state:

[0036] The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch;

[0037] There are N data acquisition and editing units, each of which receives the data scheduling instruction input by the master data integrator and matches it with the data scheduling instruction. The successfully matched data acquisition and editing unit sends the collected data to the master data integrator through the switch and bus, N>1;

[0038] The master data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream;

[0039] The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, performs comprehensive framing on the collected data, and generates a serial telemetry PCM data stream;

[0040] When the master data integrator does not work properly:

[0041] The backup data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; the switch shields the primary data integrator;

[0042] Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit sends the collected data to the backup data integrator through the switch and bus;

[0043] The backup data integrator receives the collected data, performs integrated framing on the collected data, and generates a serial telemetry PCM data stream.

[0044] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0045] (1) The present invention realizes the redundancy protection of telemetry PCM data stream through two bus communication paths, which can avoid the failure of telemetry task caused by the loss of telemetry data;

[0046] (2) The present invention designs a switching method between two working modes of the backup data synthesizer, which can stably and reliably realize the generation of telemetry PCM data stream;

[0047] (3) The present invention is applicable to a multi-stage switch cascade structure and has important application significance in the field of aircraft telemetry system framing information transmission technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The present invention is a schematic diagram of an aircraft telemetry PCM data stream dual redundancy system. DETAILED DESCRIPTION

[0049] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0050] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0051] The invention discloses an aircraft telemetry PCM data stream dual-redundancy system, comprising a main data integrator, a backup data integrator, a switch, a bus and a data acquisition and editing unit.

[0052] In a preferred embodiment, the aircraft telemetry PCM data stream dual-redundancy system adopts the FC-AE-1553 optical fiber bus network architecture. The primary data integrator serves as the NC node of the FC-AE-1553 network bus architecture, and the backup data integrator serves as the NC (network controller) node or NM (network moniter) node of the FC-AE-1553 network bus architecture; a switch device is used for multi-level interconnection and NT (network terminal) node expansion; the data acquisition unit serves as the NT node; the A / B bus technology is used, and the A bus and switch A are used for A bus communication, and the B bus and switch B are used for B bus communication, wherein switch A can be considered as the primary switch and switch B can be considered as the backup switch.

[0053] In a preferred embodiment, the master data integrator acts as an NC node of the FC-AE-1553 network bus architecture, sends time primitive synchronization information and data scheduling instructions to the network bus, and the scheduling instructions are sent to the data acquisition and editing unit device through the switch device; the data acquisition and editing unit acts as an NT node to respond to the data scheduling instructions and sends the collected data to the master data integrator; the master data integrator receives the collected data from the NT node, integrates and frames the collected data, and forms a serial telemetry PCM1 data stream.

[0054] When the primary data integrator works normally, the backup data integrator works in NM mode. At this time, the backup data integrator does not send time primitive synchronization information and data scheduling instructions to the FC-AE-1553 network bus, but only receives all data from the FC-AE-1553 network bus through real-time listening, and filters data information according to NC data scheduling command information and NT response information, selects data collected by the data acquisition and editing unit, and then integrates and frames the data collected by the selected data acquisition and editing unit to form a serial telemetry PCM2 data stream.

[0055] After the backup data integrator cannot detect the frame synchronization signal and clock synchronization signal sent by the primary data integrator, the NM node switches to the NC node and actively sends time primitive synchronization information and data scheduling instructions to the FC-AE-1553 network bus. After the FC-AE-1553 network bus switch device receives the time primitive synchronization information and data scheduling instructions sent by the backup data integrator, the interface communication function of the primary data integrator device is shielded. The FC-AE-1553 network bus switch device only responds to the time primitive synchronization information and data scheduling instructions sent by the backup data integrator, thereby realizing the primary / backup switching technology.

[0056] The following is combined with Figure 1 The technical solution of the present invention is described in detail:

[0057] like Figure 1 As shown, the main data integrator is connected to switch A via A bus, and switch A expands the number of interfaces of A bus, and respectively connects with data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N; the main data integrator is connected to switch B via B bus, and switch B expands the number of interfaces of B bus, and respectively connects with data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N.

[0058] The backup data integrator is connected to switch A via A bus, and switch A expands the number of interfaces of A bus and connects to data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N respectively; the backup data integrator is connected to switch B via B bus, and switch B expands the number of interfaces of B bus and connects to data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N respectively.

[0059] The primary data integrator sends a frame synchronization signal and a clock synchronization signal to the backup data integrator.

[0060] The master data integrator NC node sends time primitive synchronization information and data scheduling instructions through the A bus and switch A, and sends time primitive synchronization information and data scheduling instructions through the B bus and switch B. The data scheduling instructions reach the data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N through the A bus, switch A and B bus, and switch B. Data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N match the data scheduling instructions. The successfully matched data acquisition and editing unit equipment responds to the data scheduling instructions and sends the collected data to the master data integrator NC node through the A bus, switch A and B bus, and switch B. The master data integrator NC node performs integrated framing on the data acquisition and editing unit data to form a serial telemetry PCM1 data stream.

[0061] When the primary data integrator is working normally, the backup data integrator is in NM mode. At this time, the backup data integrator does not send time primitive synchronization information and data scheduling instructions. It only receives all bus data sent through A bus, switch A and B bus, and switch B through real-time monitoring, and filters data information according to NC data scheduling command information and NT response information, selects data collected by data acquisition and editing units, and then performs comprehensive framing on the selected data collected by data acquisition and editing units to form a serial telemetry PCM2 data stream. The PCM2 data stream formed by real-time monitoring by switch B realizes the redundant backup of data stream when the primary data integrator is working normally.

[0062] The primary data integrator sends a frame synchronization signal and a clock synchronization signal to the backup data integrator. After the backup data integrator cannot detect the frame synchronization signal and the clock synchronization signal sent by the primary data integrator, it switches from the NM node to the NC node, and actively sends time primitive synchronization information and data scheduling instructions to the A bus, switch A and the B bus, switch B, data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N. After switch A and switch B receive the time primitive synchronization information and data scheduling instructions sent by the backup data integrator, switch A and switch B actively shield the interface communication function of the primary data integrator device, and then switch A and switch B only respond to the time primitive synchronization information and data scheduling instructions sent by the backup data integrator. Then, the backup data integrator NC node sends the time primitive synchronization information and data scheduling instructions through the A bus and switch A, and sends the time primitive synchronization information and data scheduling instructions through the B bus and switch B. The data scheduling instruction passes through the A bus, switch A and B bus, and switch B to reach data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N respectively. Data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N match the data scheduling instruction, and the successfully matched data acquisition and editing unit device responds to the data scheduling instruction and sends the collected data to the backup data integrator NC node through the A bus, switch A and B bus, and switch B. The backup data integrator NC node integrates and frames the data of the data acquisition and editing unit to form a serial telemetry PCM2 data stream.

[0063] Example:

[0064] The embodiment of the present invention realizes a dual redundant design of aircraft telemetry PCM data stream, including a primary data integrator, a backup data integrator, a clock synchronization signal and a frame synchronization signal sent by the primary data integrator to the backup data integrator, a switch A, an A bus, a switch B, a B bus, a data acquisition and editing unit 1, a data acquisition and editing unit 2... a data acquisition and editing unit N-1, a data acquisition and editing unit N, wherein switch A is a primary switch and switch B is a backup switch.

[0065] The embodiment of the present invention provides a method for realizing dual redundancy design of aircraft telemetry PCM data stream.

[0066] The master data integrator NC node sends time primitive synchronization information and data scheduling instructions through the A bus and switch A, and sends time primitive synchronization information and data scheduling instructions through the B bus and switch B. The data scheduling instructions reach the data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N through the A bus, switch A and B bus, and switch B. Data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N match the data scheduling instructions. The successfully matched data acquisition and editing unit equipment responds to the data scheduling instructions and sends the collected data to the master data integrator NC node through the A bus, switch A and B bus, and switch B. The master data integrator NC node performs integrated framing on the data acquisition and editing unit data to form a serial telemetry PCM1 data stream.

[0067] When the primary data integrator works normally, the backup data integrator is in NM mode. At this time, the backup data integrator does not send time primitive synchronization information and data scheduling instructions, but only receives all bus data sent through A bus, switch A and B bus, and switch B through real-time listening, and filters data information according to NC data scheduling command information and NT response information, filters out useless data, and selects data collected by data acquisition and editing units, and then integrates and frames the data collected by the selected data acquisition and editing units to form a serial telemetry PCM2 data stream.

[0068] The primary data integrator sends a frame synchronization signal and a clock synchronization signal to the backup data integrator. After the backup data integrator cannot detect the frame synchronization signal and the clock synchronization signal sent by the primary data integrator, it switches from the NM node to the NC node, and actively sends time primitive synchronization information and data scheduling instructions to the A bus, switch A and the B bus, switch B, data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N. After switch A and switch B receive the time primitive synchronization information and data scheduling instructions sent by the backup data integrator, switch A and switch B actively shield the interface communication function of the primary data integrator device, and then switch A and switch B only respond to the time primitive synchronization information and data scheduling instructions sent by the backup data integrator. Then, the backup data integrator NC node sends the time primitive synchronization information and data scheduling instructions through the A bus and switch A, and sends the time primitive synchronization information and data scheduling instructions through the B bus and switch B. The data scheduling instruction passes through the A bus, switch A and B bus, and switch B to reach data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N respectively. Data acquisition and editing unit 1, data acquisition and editing unit 2...data acquisition and editing unit N-1, and data acquisition and editing unit N match the data scheduling instruction, and the successfully matched data acquisition and editing unit device responds to the data scheduling instruction and sends the collected data to the backup data integrator NC node through the A bus, switch A and B bus, and switch B. The backup data integrator NC node integrates and frames the data of the data acquisition and editing unit to form a serial telemetry PCM2 data stream.

[0069] The editing data acquired by the above-mentioned PCM1 data stream and PCM2 data stream are the same data, and the numbers 1 and 2 only represent the difference in data synthesizers.

[0070] The present invention is still applicable to a multi-stage switch cascade structure, and the technical principles and technical methods are consistent with the above statements.

[0071] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0072] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. An aircraft telemetry PCM data stream dual redundancy system, characterized in that: include: Main data integrator, backup data integrator, switch, bus and data acquisition and editing unit; When the master data integrator is in normal working state: The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; There are N data acquisition and editing units, each of which receives the data scheduling instruction input by the master data integrator and matches it with the data scheduling instruction. The successfully matched data acquisition and editing unit responds to the data scheduling instruction and sends the collected data to the master data integrator through the switch and the bus, N>1; The master data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream; The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, performs comprehensive framing on the collected data, and generates a serial telemetry PCM data stream; When the master data integrator does not work properly: The backup data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; the switch shields the primary data integrator; Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit responds to the data scheduling instruction and sends the collected data to the backup data integrator through the switch and the bus; The backup data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream; The primary data integrator sends frame synchronization signals and clock synchronization signals to the backup data integrator in real time. When the backup data integrator can detect the frame synchronization signal and clock synchronization signal, it is in a normal working state of the primary data integrator, and the backup data integrator does not send data scheduling instructions. When the backup data integrator cannot receive the frame synchronization signal and clock synchronization signal, it is in an abnormal working state of the primary data integrator, and the backup data integrator actively sends data scheduling instructions.

2. The aircraft telemetry PCM data stream dual redundancy system according to claim 1, characterized in that: The number of switches is 2, including a main switch and a backup switch; the number of buses is 2, wherein the bus corresponding to the main switch is called a first bus, and the bus corresponding to the backup switch is called a second bus; When the master data integrator works normally: The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the first bus and the main switch, and sends data scheduling instructions to the data acquisition and editing unit through the second bus and the standby switch; There are N data acquisition and editing units, each of which receives a data scheduling instruction input by the primary data integrator and matches the data scheduling instruction. The successfully matched data acquisition and editing unit sends the primary acquisition data to the primary data integrator through the primary switch and the first bus, and sends the backup acquisition data to the primary data integrator through the backup switch and the second bus, N>1; The master-slave data synthesizer receives the main acquisition data and the backup acquisition data. When the main acquisition data is normal, it frames the main acquisition data. When the main acquisition data is abnormal, it frames the backup acquisition data to generate a serial telemetry PCM data stream. The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, frames the collected data, and generates a serial telemetry PCM data stream; When the master data integrator does not work properly: The backup data integrator sends data scheduling instructions to the data collection and editing unit through the first bus and the main switch, and sends data scheduling instructions to the data collection and editing unit group through the second bus and the backup switch; the main switch and the backup switch shield the main data integrator; Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit sends the main collection data to the backup data integrator through the main switch and the first bus, and sends the backup collection data to the backup data integrator through the backup switch and the second bus. The backup data integrator receives the main acquisition data and the backup acquisition data. When the main acquisition data is normal, it frames the main acquisition data. When the main acquisition data is abnormal, it frames the backup acquisition data to generate a serial telemetry PCM data stream.

3. The aircraft telemetry PCM data stream dual redundancy system according to claim 1, characterized in that: When the master data integrator works normally, it also sends time primitive synchronization information to the data acquisition and editing unit through the bus and the switch; When the main data integrator does not work properly, the backup data integrator also sends time primitive synchronization information to the data acquisition and editing unit through the bus and the switch; The data collection and editing unit performs corresponding operations at a preset time according to the time primitive synchronization information.

4. The aircraft telemetry PCM data stream dual redundancy system according to claim 1, characterized in that: The condition for the switch to shield the primary data integrator is that the switch receives a data scheduling instruction from the backup data integrator.

5. The aircraft telemetry PCM data stream dual redundancy system according to claim 1, characterized in that: After receiving the collected data, the primary data integrator or the backup data integrator filters the collected data to obtain the real collected data.

6. The aircraft telemetry PCM data stream dual redundancy system according to claim 1, characterized in that: Adopt FC-AE-1553 optical fiber bus network architecture.

7. The aircraft telemetry PCM data stream dual redundancy system according to claim 6, characterized in that: The master data integrator serves as the NC node of the FC-AE-1553 fiber optic bus network architecture, and the data acquisition and editing unit serves as the NT node of the FC-AE-1553 fiber optic bus network architecture; when the master data integrator is in normal working state, the backup data integrator serves as the NM node of the FC-AE-1553 fiber optic bus network architecture, and when the master data integrator is in abnormal working state, the backup data integrator switches to the NC node of the FC-AE-1553 fiber optic bus network architecture.

8. A method for generating aircraft telemetry PCM data stream, characterized in that: The dual redundant system for aircraft telemetry PCM data streams according to any one of claims 1 to 7 is implemented, comprising: When the master data integrator is in normal working state: The master data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; There are N data acquisition and editing units, each of which receives the data scheduling instruction input by the master data integrator and matches it with the data scheduling instruction. The successfully matched data acquisition and editing unit sends the collected data to the master data integrator through the switch and bus, N>1; The master data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream; The backup data synthesizer monitors the collected data sent by the data collection and editing unit through the switch and bus in real time, performs comprehensive framing on the collected data, and generates a serial telemetry PCM data stream; When the master data integrator does not work properly: The backup data integrator sends data scheduling instructions to the data acquisition and editing unit through the bus and the switch; the switch shields the primary data integrator; Each data collection and editing unit receives the data scheduling instruction input by the backup data integrator and matches it with the data scheduling instruction. The successfully matched data collection and editing unit sends the collected data to the backup data integrator through the switch and bus; The backup data synthesizer receives the collected data, performs synthesis framing on the collected data, and generates a serial telemetry PCM data stream.

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