CN116166476A - Dual-redundancy architecture arbitration processing method for onboard multifunctional display - Google Patents

Abstract

This application provides an arbitration processing method for an airborne multi-function display with dual redundancy architecture, which belongs to the technical field of airborne display dual redundancy, and specifically includes the following steps: establishing a third-party arbitration unit in the dual-redundancy architecture of the display; third-party arbitration After the unit is powered on, the first channel is selected as the main control channel by default, and the working status of the first channel and the second channel is monitored in real time; if the first channel and the second channel are normal, the current main control channel will be maintained; if the second channel If one channel is normal and the second channel is faulty, then it is determined that the channel where the first channel is located is the main control channel; if the second channel is normal, then it is determined that the channel where the second channel is located is the main control channel; Keep the current master channel. Through the processing scheme of the present application, an effective redundancy switching mechanism is provided for the dual-redundancy display, and the reliability of product tasks is improved.

Description

Arbitration processing method for dual-redundancy architecture of airborne multi-function display

technical field

The present application relates to the technical field of dual-redundancy airborne displays, and in particular to an arbitration processing method for a dual-redundancy architecture of an airborne multi-function display.

Background technique

In order to improve mission reliability, more complex displays (such as large-screen displays) are equipped with a dual-redundancy design. At present, the dual-redundancy display is equipped with two sets of independent and parallel working systems on the carrier aircraft, each of which relies on its own control unit to complete the display, and the effect achieved is a dual-set backup display product. But the two systems are just a simple one-way connection: one redundancy is the main and the other is the auxiliary, and the relationship between the main and the auxiliary is fixed and cannot be changed. Redundancy switching is single and irreversible, and there are problems of lack of redundancy in operation space and unfriendly human-computer interaction.

Contents of the invention

In view of this, the present application provides an arbitration processing method for the dual-redundancy architecture of an airborne multi-function display, which solves the problems in the prior art, provides an effective redundancy switching mechanism for the dual-redundancy display, and improves product task reliability.

An arbitration processing method for an airborne multi-function display with dual-redundancy architecture provided by the application adopts the following technical scheme:

An arbitration processing method for an airborne multi-function display with dual-redundancy architecture, comprising the following steps:

Establish a third-party arbitration unit in the dual redundancy architecture of the display;

After the third-party arbitration unit is powered on, the first channel is selected as the main control channel by default, and the working status of the first channel and the second channel is monitored in real time;

If both the first channel and the second channel are normal, keep the current master channel;

If the first channel is normal and the second channel is faulty, it is determined that the channel where the first channel is located is the master channel, and the third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time;

If the first channel fails and the second channel is normal, it is determined that the channel where the second channel is located is the master channel, and the third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time;

If both the first channel and the second channel fail, the current master control channel is maintained, and the third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time.

Optionally, the third-party arbitration unit includes a complex programmable logic device, a crystal oscillator, a power supply and various selection switch circuits, the power supply supplies power to the complex programmable logic device CPLD, and the crystal oscillator provides a clock for the complex programmable logic device CPLD source, the complex programmable logic device collects state information of the first channel and the second channel, and the complex programmable logic device sends channel selection instructions to each selection switch circuit through the IO interface.

Optionally, the selection switch circuit includes a video channel selection switch circuit, a communication channel selection switch circuit and an optical signal channel selection switch circuit.

Optionally, a default configuration is set for each selection switch circuit, and each selection switch circuit is normally closed or normally open.

Optionally, three status signals are used to determine the status of the first channel and the second channel, and when the channel status reported by at least two interfaces is normal, it is determined that the corresponding channel is normal, wherein the three status signals are signals of different types.

Optionally, the complex programmable logic device collects state information of the first channel or the second channel through one RS232 serial port and two pulse width modulation signals.

In summary, the application includes the following beneficial technical effects:

This application uses a third-party arbitration unit to connect and fuse the two systems. First, one channel is preset as the main control channel, and then the status information of the two channels is detected, and then which channel is the main control channel, and the two channels are the main control channel. The auxiliary relationship is not fixed, but through real-time detection of the status information of the two channels, according to the channel status information, the normal channel or the preset channel is selected as the main control channel, so as to ensure the normal and stable operation of the display and improve the product quality. Reliability, in this application, the primary and secondary relationship of the two channels is adjusted and switched according to the design logic and their respective state information, and the redundancy can be reversibly switched to improve the friendliness of human-computer interaction.

The selection switch circuit adopts a normally closed (or normally open) design. When the CPLD and surrounding circuits fail, it will not affect the normal function realization of the current channel inside the product, but only affect the internal redundancy switching function of the product. The channel selection circuit designed by the selection switch has a default configuration to ensure that the default channel can still transmit video and communication signals when the arbitration device is damaged, improving the functional reliability of the product.

This application uses three BIT signals (signals not of the same type) for combined judgment to avoid misjudgment caused by interference and improve the credibility of the system self-check.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the architecture diagram of the arbitration processing of the dual-redundancy architecture of the airborne multi-function display of the present application;

Fig. 2 is the structural block diagram of the third-party arbitration unit and dual-channel display of the present application;

Fig. 3 is a logic diagram of dual-channel main and auxiliary working state switching.

Detailed ways

Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

Embodiments of the present application are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. The present application can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It is noted that the following describes various aspects of the embodiments that are within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is illustrative only. Based on the present application one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, any number of the aspects set forth herein can be used to implement an apparatus and/or practice a method. In addition, such an apparatus may be implemented and/or such a method practiced using other structure and/or functionality than one or more of the aspects set forth herein.

It should also be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic idea of the application, and only the components related to the application are shown in the drawings rather than the number, shape and number of components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

Additionally, in the following description, specific details are provided to facilitate a thorough understanding of examples. However, it will be understood by those skilled in the art that the described aspects may be practiced without these specific details.

An embodiment of the present application provides an arbitration processing method for a dual-redundancy architecture of an airborne multi-function display.

As shown in Figures 1-3, an arbitration processing method for an airborne multi-function display with dual-redundancy architecture includes the following steps:

Establish a third-party arbitration unit in the dual-redundancy architecture of the display.

After the third-party arbitration unit is powered on, the first channel is selected as the main control channel by default, and the working status of the first channel and the second channel is monitored in real time.

If both the first channel and the second channel are normal, keep the current master channel.

0 If the first channel is normal and the second channel is faulty, it is determined that the channel where the first channel is located is the master channel,

The third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time.

If the first channel fails and the second channel is normal, it is determined that the channel where the second channel is located is the master channel, and the third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time.

If both the first channel and the second channel fail, the current master control channel is maintained, and the third-party arbitration unit continues to monitor the working status of the first channel and the second channel in real time.

This application uses a third-party arbitration unit to connect and fuse the two systems. First, one channel is preset as the main control channel, and then the status information of the two channels is detected, and then which channel is the main control channel, and the two channels are the main control channel. The auxiliary relationship is not fixed, but through real-time detection of the status information of the two channels, according to the channel status information, the normal channel or the preset channel is selected as the main control channel and display channel, so as to ensure the normal and stable operation of the display , to improve product reliability. In this application, the primary and secondary relationship of the two channels is adjusted and switched according to the logic of the design and their respective state information, and the redundancy can be reversibly switched to improve the friendliness of human-computer interaction.

The third-party arbitration unit includes a complex programmable logic device (Complex Programmable LogicDevice, CPLD for short), a crystal oscillator, a power supply and various selection switch circuits, the power supply supplies power to the complex programmable logic device CPLD, and the crystal oscillator is a complex programmable logic device. The device CPLD provides a clock source, the complex programmable logic device collects the state information of the first channel and the second channel, and the complex programmable logic device sends channel selection instructions to each selection switch circuit through an IO interface (Input and Output).

The third-party arbitration unit takes the high-reliability logic device CPLD as the core to build the smallest system to ensure low failure rate.

The selection switch circuit includes a video channel selection switch circuit, a communication channel selection switch circuit, an optical signal channel selection switch circuit and the like. A default configuration is set for each selection switch circuit, and each selection switch circuit is normally closed or normally open. The selection switch circuit adopts a normally closed (or normally open) design. When the CPLD and surrounding circuits fail, it will not affect the normal function realization of the current channel inside the product, but only affect the internal redundancy switching function of the product. The channel selection circuit designed by the selection switch has a default configuration to ensure that the default channel can still transmit video and communication signals when the arbitration device is damaged, improving the functional reliability of the product.

Three state signals are used to judge the state of the first channel and the second channel, and when the channel states reported by at least two interfaces are normal, it is determined that the corresponding channel is normal, wherein the three state signals are signals of different types. The complex programmable logic device collects state information of the first channel or the second channel through one RS232 serial port and two pulse width modulation (Pulse Width Modulation, PWM for short) signals. This application uses three BIT signals (signals not of the same type) for combined judgment to avoid misjudgment caused by interference and improve the credibility of the system self-check.

The above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (6)

1. The arbitration processing method for the dual redundancy architecture of the onboard multifunctional display is characterized by comprising the following steps of:

establishing a third party arbitration unit in the dual redundancy architecture of the display;

after the third party arbitration unit is powered on and started, the first channel is selected as a main control channel by default, and the working states of the first channel and the second channel are monitored in real time;

if the first channel and the second channel are normal, the current main control channel is kept;

if the first channel is normal and the second channel fails, determining the channel in which the first channel is positioned as a main control channel, and continuously monitoring the working states of the first channel and the second channel in real time by a third party arbitration unit;

if the first channel fails and the second channel is normal, determining the channel where the second channel is located as a main control channel, and continuously monitoring the working states of the first channel and the second channel in real time by a third party arbitration unit;

if the first channel and the second channel are both faulty, the current main control channel is kept, and the third party arbitration unit continues to monitor the working states of the first channel and the second channel in real time.

2. The method for processing the dual redundancy architecture arbitration of the onboard multifunction display according to claim 1, wherein the third party arbitration unit comprises a complex programmable logic device, a crystal oscillator, a power supply and various selection switch circuits, the power supply supplies power to the complex programmable logic device CPLD, the crystal oscillator supplies a clock source to the complex programmable logic device CPLD, the complex programmable logic device acquires state information of the first channel and the second channel, and the complex programmable logic device sends channel selection instructions to the various selection switch circuits through an IO interface.

3. The method of claim 2, wherein the selection switch circuit comprises a video channel selection switch circuit, a communication channel selection switch circuit, and an optical signal channel selection switch circuit.

4. A dual redundancy architecture arbitration processing method for an on-board multifunction display as recited in claim 3, wherein a default configuration is set for each of said selection switch circuits, each of said selection switch circuits being normally closed or normally open.

5. The method for arbitrating and processing dual redundancy architecture of an on-board multifunctional display according to claim 1, wherein three status signals are adopted to judge the status of the first channel and the second channel, and when the status of the channel reported by at least two interfaces is normal, the corresponding channel is judged to be normal, wherein the three status signals are different types of signals.

6. The method for processing the dual redundancy architecture arbitration of the onboard multifunction display according to claim 2, wherein the complex programmable logic device collects the state information of the first channel or the second channel through one path of RS232 serial port and two paths of pulse width modulation signals.

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