LRM type gateway component suitable for airplane power distribution system

Abstract

The invention belongs to the technical field of aviation power distribution systems, and discloses an LRM type gateway component suitable for an aircraft power distribution system, which comprises a processor module, a storage module, a power conversion module, a discrete magnitude module, an analog quantity module, a debugging interface, a maintenance upgrading interface, a self-inspection / mutual inspection module, an AFDX communication module and a TTP / C communication module. Through the design of the gateway component, gateway functions in a power distribution system can be realized, including an AFDX communication function with an avionics system, a TTP bus communication function in a secondary power distribution system, a software online loading function, a power distribution control function, a secondary power distribution load configuration function, a load state indication function, various communication data processing, forwarding, operation and the like.

Description

Technical Field

[0001] The present invention belongs to civil aviation power distribution technology, and specifically relates to an LRM type gateway component suitable for an aircraft power distribution system, which can be applied to the design of a gateway power distribution device of an aircraft secondary power distribution system. Background Art

[0002] With the development of civil aircraft power distribution technology, the role of remote power distribution devices has become increasingly prominent. Among them, the LRM gateway component of the aircraft power distribution system is an important component of the remote power distribution device. Its functions mainly undertake the ADN network communication, aircraft power distribution system network communication, EDN network communication functions, software online loading, maintenance and debugging, etc. in the gateway communication function of the product; the indication function of the aircraft power distribution system; the execution load unloading function, aircraft power distribution system power-on inspection, aircraft power distribution system working mode selection, secondary power distribution load configuration, etc. in the aircraft power distribution system control function; support RAT power-on initialization test in the RAT working inspection function. However, the existing LRM gateway component design can no longer meet the needs of technological development. Therefore, a LRM gateway component design suitable for aircraft power distribution systems is proposed to provide technical support for the development of civil aircraft power distribution technology. Summary of the invention

[0003] In order to overcome the deficiencies in the existing designs, the present invention proposes an LRM type gateway component suitable for an aircraft power distribution system, which provides a reference for the design of an LRM type gateway component of a remote power distribution device in civil aircraft power distribution technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An LRM type gateway component suitable for an aircraft power distribution system, comprising: a processor module, a storage module, a power conversion module, a discrete quantity module, an analog quantity module, a debugging interface, a maintenance and upgrade interface, a self-check / mutual check module, an AFDX communication module, and a TTP / C communication module, wherein:

[0006] The processor module is connected to the storage module and discrete quantity module through a parallel bus; connected to the analog quantity module through a serial bus; connected to the debug interface module through a UART bus; connected to the maintenance and upgrade interface module through an RGMI bus; connected to the self-test / mutual test module through an RGMI bus and a parallel bus; connected to the AFDX communication module and the TTP / C communication module through a PCIe bus. The power conversion module is used to generate the power supply required by other modules. Through the design of this gateway component, the functions of the gateway component in the power distribution system can be realized, including the AFDX communication function with the avionics system, the TTP bus communication function within the secondary power distribution system, the software online loading function, the power distribution control function, the secondary power distribution load configuration function, the load status indication function, and various communication data processing, forwarding, and calculation functions.

[0007] As a further technical solution of the present invention, the processor module is responsible for functions such as device internal interface processing, self-checking / mutual checking, communication data processing, discrete / analog signal processing, data storage and logic control;

[0008] As a further technical solution of the present invention, the storage module is responsible for the internal information storage of the aircraft power distribution system equipment, and can expand the FLASH storage mainly through the parallel interface of the processor module. The parallel bus of the processor module is connected to the FLASH bus signal to realize the reading and writing of the FLASH chip to meet the requirements of the aircraft power distribution system data storage fault information, system operation status information, configuration files, etc.

[0009] As a further technical solution of the present invention, the power conversion module is responsible for providing secondary conversion of the internal power of the aircraft power distribution system and supplying power to other modules. At the same time, the power module is responsible for power-on timing control during the power-on process to ensure that the processor function starts normally. In addition, the power module provides monitoring functions for each secondary power supply and reports the health status of the power supply;

[0010] As a further technical solution of the present invention, the discrete quantity module and LRM type gateway components need to collect discrete quantity signals. In order to prevent the external discrete quantity power supply from interfering with the normal operation of the equipment and to ensure that the power supply bus can ensure a stable discrete quantity threshold recognition function when the voltage changes, an isolated regulated power supply is used to independently power the discrete quantity acquisition circuit.

[0011] As a further technical solution of the present invention, the analog module, the LRM type gateway component needs to collect the power supply analog quantity on the board, including the power supply analog quantity and the conversion power supply analog quantity used inside the board. The power supply analog quantity is two 28V input voltages, and the power supply of the analog quantity acquisition circuit is switched out using a separate power supply module.

[0012] As a further technical solution of the present invention, the debugging interface is a serial port controller integrated inside the processor module, and the peripheral adopts RS232 communication, supports the baud rate configuration inside the chip, and can realize information printing and debugging testing.

[0013] As a further technical solution of the present invention, the maintenance and upgrade interface is composed of a processor module with an RGMII interface, a processor designed to lead out RGMII, an Ethernet controller and an Ethernet PHY chip. The maintenance network port can realize the processor program loading function.

[0014] As a further technical solution of the present invention, the self-check / mutual-check module is designed for dual-redundant board communication, a handshake interface between boards is designed, input and output discrete quantities are designed for master-slave handshake, and information synchronization between LRM-type gateway components is performed through the Ethernet bus between boards.

[0015] As a further technical solution of the present invention, in the AFDX communication module, the processor accesses and configures the AFDX bus control chip through the PCIe serial port signal, and the AFDX bus control chip sends and receives AFDX bus signals through the Ethernet controller, and the bus is isolated through the network transformer to ensure the reliability and security of communication with the avionics network.

[0016] As a further technical solution of the present invention, the TTP / C communication module includes a low-speed TTP bus communication circuit and a high-speed TTP bus communication circuit; the low-speed TTP realizes the networking communication between the primary and secondary power distribution systems of the aircraft, and the high-speed TTP realizes the master-slave network communication within the secondary power distribution system of the aircraft.

[0017] As a further technical solution of the present invention, the gateway component architecture adopts a modular design, and the modules can be cut according to the equipment requirements to be suitable for different power distribution equipment.

[0018] As a further technical solution of the present invention, the gateway component architecture includes a high-speed communication AFDX bus that can be used to connect the aircraft power distribution system and the avionics system, a low-speed TTP bus network interface that can be used to connect the primary and secondary power distribution systems, and a high-speed TTP bus network interface that can be used between secondary power distribution systems.

[0019] As a further technical solution of the present invention, the gateway component architecture is designed to be scalable and can be up to 7 devices in the secondary power distribution system network.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Through the design of this gateway component, the gateway function in the power distribution system can be realized, including the AFDX communication function with the avionics system, the TTP bus communication function inside the secondary power distribution system, the software online loading function, the power distribution control function, the secondary power distribution load configuration function, the load status indication function, and various communication data processing, forwarding, calculation and other functions.

[0022] 2. The gateway components adopt a modular design, which is scalable and improves the adaptability range. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0024] Figure 1 The present invention is an active protection circuit diagram of a power device suitable for SSPC. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 The present invention designs the main modules of the LRM type gateway component, including the processor module, storage module, power conversion module, discrete quantity module, analog quantity module, debugging interface, maintenance and upgrade interface, self-checking / mutual check module, AFDX communication module and TTP / C communication module, which provides a reference for the design of the LRM type gateway component of the remote power distribution device in the power distribution technology of civil aircraft. The specific design process is as follows:

[0027] LRM gateway component processor module design:

[0028] The processor module design mainly includes three parts: main processor, storage module, and maintenance interface module (debugging serial port and debugging network port).

[0029] Main processor: With the main processor chip as the core, it cooperates with peripheral clock, reset, DDR, FLASH, debug network port and debug serial port, etc. to provide a control platform for the entire module;

[0030] DDR memory: It is a large-capacity external memory of the main processor, which enables the main processor to meet the needs of data calculation, storage and data exchange;

[0031] FLASH data storage: It is composed of FLASH chips and is mainly used to store system startup programs, system programs and user programs;

[0032] Debug serial port: The serial port provided by the main processor chip is converted to a suitable level and then formed through the RS232 interface chip. It is mainly used for communication with the PC serial port during debugging.

[0033] Debug / communication network port: It is composed of the RGMI interface provided by the main processor chip and the external chip. It is mainly used to communicate with the PC network port and download programs during debugging;

[0034] The processor module has an LED that can indicate the operating status of the LRM gateway component. When the LED is on, it means that the module is in the main operating state.

[0035] LRM type gateway component storage module design:

[0036] The storage module is designed to expand FLASH storage through the processor's parallel interface.

[0037] The parallel bus of the processor module is connected to the FLASH bus signal to realize the reading and writing of the FLASH chip.

[0038] Considering that the storage requirements of fault information need to be jointly defined and confirmed, the design of the storage capacity of the storage module can be changed to ensure that the aircraft power distribution system can store enough flight segment fault information.

[0039] Design of power conversion module for LRM gateway components:

[0040] The power conversion module design uses the power output from the aircraft power distribution system as a redundant power supply, and the power supply circuit design fully improves the reliability of the power supply of each functional module. After the external DC power supply is input, it is converted into the required voltage through the power chip to power various chips.

[0041] LRM type gateway component discrete module design:

[0042] The discrete quantity module design needs to collect discrete quantity signals. In order to prevent the external discrete quantity power supply from interfering with the normal operation of the equipment and to ensure that the power supply bus can ensure the stable discrete quantity threshold recognition function when the voltage changes, an isolated regulated power supply is used to independently power the discrete quantity acquisition circuit.

[0043] All external discrete input signals are lightning-proofed and low-pass filtered by RC circuit to filter out transient signals and prevent abnormal state changes of input signals.

[0044] LRM gateway component analog module design:

[0045] The analog module design includes the power supply analog quantity and the conversion power supply analog quantity used inside the device. The power supply analog quantity is two 28V input voltages, and the power supply for the analog acquisition circuit is switched out using a separate power supply module.

[0046] The analog quantity and the processor can communicate via serial communication. The AD chip transmits the corresponding channel acquisition results to the processor chip. The processor chip filters the received analog quantity values ​​for internal board health status monitoring and BIT data.

[0047] Design of debugging interface, maintenance and upgrade interface of LRM gateway components:

[0048] The serial port controller integrated inside the processor uses RS232 communication for peripherals, supports baud rate configuration inside the chip, and can realize information printing and debugging testing.

[0049] The main processor has an RGMII interface, and the processor is designed to lead out RGMII, plus an Ethernet controller and an Ethernet PHY chip. The maintenance network port can realize the main processor program loading function.

[0050] LRM gateway component self-check / mutual check module design:

[0051] The self-check / mutual-check module is designed with ground / open discrete input BIT. For dual-redundant board communication, the handshake interface between boards is designed. The input and output discrete quantities are designed for master-slave handshake, and the information between LRM gateway components is synchronized through the Ethernet bus between boards.

[0052] LRM type gateway component communication module design:

[0053] The communication module design includes AFDX communication module and TTP / C communication module.

[0054] AFDX communication: The main processor accesses and configures the AFDX bus control chip through the PCIe bus, and the AFDX bus control chip sends and receives AFDX bus signals through the Ethernet controller. The bus is isolated through a network transformer to ensure communication reliability and security.

[0055] The AFDX bus physical layer uses two completely independent channels for redundancy design. When one channel fails, the communication function can be guaranteed to operate normally.

[0056] TTP / C communication: The TTP / C communication module includes a low-speed TTP bus communication circuit and a high-speed TTP bus communication circuit. The interface between the TTP communication module and the processor module is the PCIe bus. The processor is connected to the TTP bus module through the PCIe bus to complete the configuration and data interaction between the processor and the TTP bus module.

[0057] The low-speed TTP bus realizes bus-type networking communication between the primary and secondary power distribution systems of the aircraft; the high-speed TTP bus realizes star-type networking communication between the devices within the secondary power distribution system.

[0058] So far, the purpose of the present invention has been achieved.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An LRM type gateway component suitable for aircraft power distribution system, characterized in that , adopts modular design, including processor module, storage module, power conversion module, discrete quantity module, analog quantity module, debugging interface, maintenance and upgrade interface, self-test / mutual test module, AFDX communication module and TTP / C communication module; Among them, the processor module is connected to the storage module and the discrete quantity module through a parallel bus, connected to the analog quantity module through a serial bus, connected to the debugging interface module through a UART bus, connected to the maintenance and upgrade interface module through an RGMI bus, connected to the self-test / mutual-test module through an RGMI bus and a parallel bus, and connected to the AFDX communication module and the TTP / C communication module through a PCIe bus. The processor module is responsible for the internal interface processing, self-test / mutual-test, communication data processing, discrete quantity / analog quantity signal processing, data storage and logic control functions of the equipment; the power conversion module is used to generate the power supply required by other modules.

2. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The storage module is responsible for storing information inside the aircraft power distribution system equipment, and can expand FLASH storage mainly through the parallel interface of the processor module.

3. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The power conversion module is responsible for providing secondary conversion of the internal power of the aircraft power distribution system and supplying power to other modules. At the same time, the power module is responsible for power-on timing control during the power-on process to ensure the normal startup of the processor function. In addition, the power module provides monitoring function for each secondary power supply and reports the power health status.

4. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The discrete quantity module is used to collect discrete quantity signals.

5. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The analog quantity module is used to collect the power supply analog quantity on the board, including the power supply analog quantity and the conversion power supply analog quantity used inside the board. The power supply analog quantity is two 28V input voltages, and the power supply of the analog quantity collection circuit is output using a separate power supply module.

6. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The debugging interface is a serial port controller integrated inside the processor module. The peripheral adopts RS232 communication and supports the baud rate configuration inside the chip.

7. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The maintenance and upgrade interface is composed of the processor module having an RGMII interface, the processor is designed to lead out the RGMII, and an Ethernet controller and an Ethernet PHY chip are added.

8. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The self-check / mutual-check module is designed for dual-redundant board communication, with a handshake interface between boards, input and output discrete quantities for master-slave handshake, and information synchronization between LRM gateway components via an Ethernet bus between boards.

9. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The AFDX communication module is accessed and configured by the processor module through the PCIe serial port signal of the AFDX bus control chip, and the AFDX bus control chip sends and receives AFDX bus signals through the Ethernet controller, and the bus is isolated through the network transformer.

10. The LRM type gateway component suitable for an aircraft power distribution system according to claim 1, characterized in that: The TTP / C communication module includes a low-speed TTP bus communication circuit and a high-speed TTP bus communication circuit; the low-speed TTP realizes the networking communication between the primary and secondary power distribution systems of the aircraft, and the high-speed TTP realizes the master-slave network communication within the secondary power distribution system of the aircraft.

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