CN112068808B - General processing system for multi-bus data conversion of avionics system - Google Patents
General processing system for multi-bus data conversion of avionics system Download PDFInfo
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Abstract
The invention discloses a general processing system for multi-bus data conversion of an avionic system, which comprises a data conversion management integrated development tool environment and an airborne data conversion management middleware, wherein the data conversion management integrated development tool environment provides a development environment of standardized application software elements for a user, generates an application data model according to the application software elements designed by the user, and establishes a data conversion configuration file and a data communication configuration file according to an interface control file and the application data model; the airborne data conversion management middleware loads the data conversion configuration file, the data communication configuration file and the application data model to the target machine, establishes association with the external bus message and realizes the componentized encapsulation of transmission, conversion, verification and filtration between the external multi-bus message and the application service data. The invention effectively improves the portability, reusability and expansibility of avionics system software.
Description
Technical Field
The invention relates to a bus data communication transmission technology in the field of aviation, in particular to a general processing system for multi-bus data conversion of an avionic system.
Background
The avionics system is a complex system which is composed of a plurality of systems, a plurality of environments, a plurality of tasks and a plurality of resources, is mutually associated, mutually supported, mutually integrated and mutually restricted, and has the characteristics of forming and managing the complex system which is composed of multiple targets, multiple information, multiple specialties, multiple tasks, multiple functions, multiple resources and multiple processes. Technological advances have prompted Avionics systems to move from a combined architecture to Integrated Modular Avionics (IMA) systems, which achieve a high degree of physical and functional integration. With the rapid development of avionics system software, bus data communication processing functions in traditional avionics systems are handled "from scratch" by applications, and the development of software engineering techniques has led developers to increasingly emphasize software development by modifying, reusing, and re-engineering existing software products rather than all "from scratch".
In order to ensure reusability of avionics software, improve maintainability and transportability of the software in the whole life cycle and reduce research and development cost, the avionics multi-bus data conversion software is standardized, a unified data conversion management execution environment facing the avionics field is designed, a middleware technology supporting the avionics system multi-bus data conversion management is researched, and the avionics system multi-bus data conversion management middleware has important significance for improving functions, performance and comprehensive degree of an avionics system.
Disclosure of Invention
The invention aims to provide a multi-bus data conversion general processing system of an avionics system, which is used for supporting management, design, development and other works of users with different roles on the componentized development process of data conversion software, and effectively improving the portability, reusability and expansibility of avionics system software.
The invention aims to be realized by the following technical scheme:
a general processing system for multi-bus data conversion of an avionics system comprises a data conversion management integrated development tool environment and an airborne data conversion management middleware;
the data conversion management integrated development tool environment provides a development environment of standardized application software elements for a user, an application data model is generated according to the application software elements designed by the user, and a data conversion configuration file and a data communication configuration file are established according to an interface control file and the application data model; the data communication configuration file describes data communication modes between different bus interfaces and the application data model;
the airborne data conversion management middleware loads the data conversion configuration file, the data communication configuration file and the application data model to the target machine, establishes association with the external bus message, and realizes the componentized encapsulation of transmission, conversion, verification and filtration between the external multi-bus message and the application service data.
The invention has the beneficial effects that:
the data conversion management integrated development tool environment is a set of environment supporting modular incremental development, integration and verification conforming to avionic data conversion software, and is used for supporting management, design, development and other works of users with different roles on the modular development process of the data conversion software. According to the invention, the modular encapsulation of the data conversion function in the avionics field is adopted to support the pedigree avionics system, so that the reuse capacity of the data conversion professional component is improved; by means of the business data modeling and generating technology, the rapid development capacity of the components and the application is provided, and the application function development integration efficiency of the avionics system is improved.
Drawings
FIG. 1 is a schematic structural diagram of a general processing system for multi-bus data conversion of an avionics system according to the present invention;
FIG. 2 is a schematic flow diagram of a bus interface control file management module;
FIG. 3 is a schematic flow diagram of an application business data modeling module;
FIG. 4 is a schematic flow diagram of a data configuration generation module;
FIG. 5 is a schematic flow chart of an application service data positioning plug-in;
fig. 6 is an execution flow of the onboard data conversion management middleware.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
Referring to fig. 1, a general processing system for multi-bus data conversion of an avionics system comprises: a set of data transformation management integrated development tool environment 101 and an on-board data transformation management middleware 102.
The data conversion management integrated development tool environment 101 provides a development environment of standardized application software elements for a user, generates an application data model according to the application software elements designed by the user, and establishes a data conversion configuration file and a data communication configuration file according to the interface control file and the application data model. The data conversion configuration file describes data conversion modes between different bus data and application data models, and the data communication configuration file describes data communication modes between different bus interfaces and application data models. The data conversion management integrated development tool environment comprises a control panel module, an interface control file management module, an application service data modeling module, a data conversion configuration generation module, a data conversion configuration verification module, a data positioning plug-in, and a version and authorization management module.
The control panel module provides a user interface for interaction between a user and other modules, including a navigation view, a menu bar, a status bar, a work bar, and the like. The control panel module is realized based on an MVC model, a Java desktop GUI framework JavaFX is adopted, a View layer in the MVC model is written in XML, CSS and visual editing are supported, each GUI component is realized by the MVC model, particularly, relatively complex GUI components such as list boxes, tables and trees support bidirectional synchronization between internal data modification and interface display modification.
The interface control file defines and describes the relationship between a physical interface and a logical interface of the avionics system, and is an important input for developing data conversion software, and the description and transmission mode of the original interface control file cannot meet the requirement of data conversion, so that an interface control file management module is required to export interface function data from the interface control file.
Referring to fig. 2, the interface control file management module performs the following operations on the imported interface control file:
step 101: and extracting original interface function data from the imported interface control file by using the interface function template.
Step 102: and then, converting the original interface function data into the interface function data in the format required by the data conversion configuration generation module. In the process of converting interface function data, there are parts which can be directly extracted from the original interface function data, and there are parts which need to be calculated to complete the conversion.
Step 103: and verifying the structure, attribute and integrity of the converted interface function data to ensure the consistency of the interface function and the original interface control file. For the part directly extracted in step 102, only the consistency with the original interface control file needs to be verified, and the part which can be converted through calculation is subjected to analysis of the calculation process and verification of the correctness of the calculation process.
Step 104: after verification is completed, interface function data and analysis reports are issued to all stakeholders. The change management of the interface function data extracts the backup copy in the form of an intermediate file, supports the editing and changing of a designer, and forms a modification log at the same time. The exported interface function data includes two parts: a bus message template and a signal template. The bus message template is designed with different attributes according to different types of buses, and defines attribute constraints, including source information, message names, message lengths, message types, message sending and receiving periods, message link information and the like of messages. The signal template describes data information contained in each message, including a signal name, a signal ID, a signal source, position information of a signal, an alignment mode of a signal, format information of a signal, a resolution of a signal, a status bit of a signal, and association information of a signal and a message. The signal passes through and establishes the mapping relation with the bus message with the associated information of message, and the application data model passes through the signal ID and establishes the mapping relation with the signal information.
The application business data modeling module is used for an application developer to design application software according to unified standards and software requirements, extracting data elements of the application software, generating an application data model and realizing unified design of the software. The application data model defines service logic communication data of the portable component, the data model is not a traditional class-based model but a semantic model, the description of the semantic model is standard, and as shown in fig. 3, an application developer can completely specify information in an application service data modeling module to realize language, portable unit data modeling, a platform data model, a logic data model, a conceptual data model and requirements from bottom to top. The application service data modeling module firstly constructs a conceptual data model according to the data interaction requirements of application software, generates a conceptual data view, then constructs a logical data model according to the conceptual data view, generates a logical data view, then constructs a platform data model according to the logical data view and a platform communication mechanism, generates a platform data view, generates a portable application model unit model according to a frame template of basic element attributes of a platform, generates related codes and configuration under the portable application model unit model, and an application software developer develops and realizes the application software logical service on the basis of the corresponding data template.
Finally, in order to adapt to the data conversion management tool environment, the codes and the configuration are required to be converted into the application data template facing the data conversion function, the addition, modification and deletion operations can be carried out on the application data template, and the attributes of the application data template, including the type, the purpose, the description and the like of the application data template, are set. The application data template comprises a service data name, a service data type, a service data size, a service data position, service data source information, service data related description, special function data customized description and the like.
The data conversion configuration generation module generates a data conversion configuration file and a data communication configuration file by combining a conversion configuration template formulated by data conversion requirements on the basis of interface functional data and an application data model.
Referring to fig. 4, the data conversion configuration generation module performs the following process:
step 201: and extracting the interface function data and business data related mapping information from an adaptable application data model of the interface function data and application business data modeling module through an interface association tool. The interface association tool extracts the independent interface function data of each application software and the related mapping information of the service data, and further standardizes the format information, thereby facilitating the further processing of the data conversion tool.
Step 202: extracting, converting and configuring related template variable part information of the interface function data and the related mapping information of the service data through a data conversion template generating tool to generate a data conversion configuration template file. The data conversion configuration template file comprises an AFDX bus message template, an AFDX data filtering selection template, an A429 bus message template, an A429 data filtering selection template, a CAN bus message template, a CAN data filtering selection template, a data validity verification template, a data format conversion precision calculation template and the like, and an extension interface is provided for supporting the generation of templates of other buses. The data conversion template generation tool corresponds to a set of corresponding configuration templates for the data conversion function of each type of bus, and the configuration templates define the invariable part and the variable part of the data conversion configuration by a template definition language. The data transformation template generation tool enables the representation of the invariant portion as one template definition and is stored and managed separately from the variant portion, which may be combined with different variant portions to generate custom text.
Step 203: and converting the data conversion configuration template file into a data conversion configuration file and a data communication configuration file through a data conversion configuration generation tool and a data communication configuration generation tool so as to complete the design and development of open architecture software and generate a PC (personal computer) end data conversion configuration file suitable for being used by the simulation platform.
The data conversion configuration verification module is used for verifying the data conversion configuration file and the data communication configuration file, and the data conversion configuration file and the data communication configuration file which pass verification are used as loading and associated objects of the data conversion management middleware and reside in simulation equipment of an onboard embedded target machine or an onboard avionic system. The data conversion configuration verification module takes the data conversion configuration file and the data communication configuration file generated by the data conversion configuration generation module as input, and performs consistency and validity verification on the data conversion configuration file and the communication configuration file generated by the data conversion configuration generation module through a series of verification algorithms and tools to finally generate a verification report.
The data positioning plug-in module realizes positioning of application function data through the Wireshark service plug-in on the basis of realizing packet capturing and unpacking of the interface control file based on the Wireshark, and can visually display the analysis result of the application function data.
Referring to fig. 5, the data positioning plug-in module generates an interface and service data mapping file facing to application software from the interface control file and the application data model through the data conversion management visualization tool environment, generates a corresponding PDU message (stored as a TOML format file for easy subsequent reading), and loads the interface and service data mapping file and the plug-in code a664. By establishing mapping between each application data and IP address of the communication UDP port, an application developer can directly find the corresponding UDP port according to the parameter name, and the analysis result of the application function data can be visually displayed by inputting the UDP port into the wireshark display filter. A plurality of UDP ports are overlapped among AFDX PDUs defined by a plurality of interface functions, one PDU message format definition can be uniquely identified by the UDP ports inside the AFDX PDUs, and therefore the a664 plug-in needs to set the interface function aimed by the a664 plug-in before running, and the problem can be solved only by editing a664.Lua setting.
The version and authorization management module is used for constructing a version file for each version of input and output of each module in the avionic system multi-bus data conversion general processing system and realizing the function of version management by managing the version files. The version and authorization management module provides an authority maintenance function, and then controls the login and each role authority of the avionics system multi-bus data conversion general processing system.
Different role personnel in each stage of the development process of each version have different functional supports, different functional views are provided for the personnel with different roles, and the version management, authority management and log management system belongs to the capability of a tool environment platform and is used for supporting the operation of users with different roles on data of different versions and generating corresponding log files.
The airborne data conversion management middleware 102 loads the data conversion configuration file, the data communication configuration file and the application data model generated by the data conversion management integrated development tool environment to the target machine, establishes association with the external bus message, and realizes the componentized encapsulation of transmission, conversion, verification and filtration between the external multi-bus message and the application service data. The airborne data conversion management middleware comprises a message correlation module, a message transceiving module, a CRC (cyclic redundancy check) module, an FC (fiber channel) check module, a data format conversion module, a data precision resolving module, a data state bit check module, a data effective range judging module and a data filtering and selecting module.
And the message association module is used for establishing a message transceiving channel between the application and the external bus by using the data communication configuration file and initializing a communication port provided by the data communication configuration file so as to support the real-time data transmission in the platform integration and operation stages.
And the message receiving and sending module is used for receiving/sending messages on the message receiving and sending channel established by the message association module according to the receiving/sending frequency defined by the interface function, and verifying the message length, the message refreshing state and the like to ensure that effective data are transmitted to a subsequent module.
And the CRC check function is configurable, whether the received or to-be-sent message needs to be subjected to CRC check is determined by reading the corresponding flag bit in the data conversion configuration file, CRC32 check is performed on the received or to-be-sent message which needs to be checked, and the CRC check is compared with an original CRC32 check code of the received or to-be-sent message to verify the correctness and the integrity of the input data. And performing CRC (cyclic redundancy check) code calculation on the output data which needs to be checked, and filling the output data into a corresponding message field.
And the FC verification function is configurable, whether the received or to-be-transmitted message needs to be subjected to FC verification is determined by reading a corresponding flag bit in the data conversion configuration file, the received or to-be-transmitted message which needs to be verified is subjected to FC verification, an FC verification code is determined according to the transmission period, the reception period, the network data transmission delay, the jitter coefficient and the like of the message, and is compared with the original FC verification code of the received or to-be-transmitted message to verify the real-time property and the validity of the input data. And performing FC (fiber channel) check code calculation on the output data which is required to be checked, and filling the output data into a corresponding message field.
And the data format conversion module is used for automatically converting the interface and the application service data format. And extracting a universal format mutual conversion model according to the information of the service data in the bus data packet, such as the data type, the data initial offset position, the data length, the alignment mode and the like, and combining the information of the service data in the application data model, such as the data type, the data initial offset position, the data length, the alignment mode and the like, so as to realize automatic, accurate and real-time conversion between the two.
And the data precision calculating module is used for calculating the precision of partial data of the partial bus received from the message sending and receiving channel, for example, binary type data exists LSB, arinc429 BNR type exists LSB, BCD type exists MSB and the like.
And the data state bit checking module is used for checking the state bit of the bus data, extracting the bus state bit corresponding to the specific service data according to the data conversion configuration file, and determining the validity of the data according to the definition of the state bit.
And the data effective range checking module is used for checking the effective range of the bus data. And judging the range of the application service data in the bus message according to the maximum and minimum value range of the data defined by the interface, and confirming the validity of the data.
The data filtering and selecting module formulates a plurality of data selecting templates of the configuration tool according to the data filtering and selecting requirements of different dimensions, realizes filtering of data of different buses with different functions, selects data of effective data sources to transmit to application software, and provides an incremental function configuration and development interface to adapt to the requirements of filtering and selecting of data of different buses.
Fig. 6 is an execution flow of an avionics system onboard data conversion management middleware, which includes initializing related work, loading corresponding data conversion configuration files into a memory according to different resident modules, providing communication configuration files to a platform middleware, simultaneously establishing message association with an external bus, registering transceiving port information, transceiving data according to transceiving frequency agreed by a bus interface by using a unified interface provided by a platform, storing received or to-be-transmitted messages according to position and alignment mode agreed by the configuration files for received data, performing a series of validity checks to ensure data availability, including whether the messages are expired, CRC check, FC check, status bit check of the messages, check of valid function range and the like, performing format conversion and precision calculation operation on valid data after completing a series of checks, and finally performing data filtering according to priority level of the data, granularity of data selection, health state of the data, fresh state of the data, data keeping locking time and the like, and selecting an optimal data source to transmit to an application. For data transmission, firstly, according to a data model and content provided by an application, combining with data conversion configuration file definition, carrying out format conversion and precision calculation on the application data model, converting the data model into a format which can be identified by a bus interface, filling the format into a specified field, filling state information according to the state, calculating and filling check bits for data which needs CRC check and FC check, finally, storing messages in a specified memory area according to transmission frequency and configuration file constraint, transmitting the messages to bottom layer driving software, and finally transmitting the messages to each bus by the bottom layer driving software.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a general processing system of avionics system multibus data conversion, contains the integrated development tool environment of data conversion management and machine carries data conversion management middleware, its characterized in that:
the data conversion management integrated development tool environment provides a development environment of data of standardized application software for a user, generates an application data model according to data elements of the application software designed by the user, and establishes a data conversion configuration file and a data communication configuration file according to an interface control file and the application data model; the data communication configuration file describes data communication modes between different bus interfaces and the application data model;
the airborne data conversion management middleware loads the data conversion configuration file, the data communication configuration file and the application data model to the target machine, establishes association with the external multi-bus message and realizes the componentized encapsulation of transmission, conversion, verification and filtration between the external multi-bus message and the application service data.
2. The multi-bus data conversion general processing system of the avionics system according to claim 1, wherein the data conversion management integrated development tool environment comprises an interface control file management module, an application service data modeling module and a data conversion configuration generation module;
the interface control file management module is used for exporting interface function data from the interface control file; the interface control file defines and describes the relationship between a physical interface and a logical interface of the avionics system;
the application business data modeling module is used for an application developer to design application software according to unified standards and software requirements, extract data elements of the application software and generate an application data model;
the data conversion configuration generation module generates a data conversion configuration file and a data communication configuration file by combining a conversion configuration template formulated by data conversion requirements on the basis of interface functional data and an application data model.
3. The avionics system multi-bus data conversion general processing system of claim 2, wherein the interface control file management module performs the following operations on the imported interface control file:
step 101: extracting original interface function data from the imported interface control file by using an interface function template;
step 102: converting the original interface function data into interface function data in a format required by a data conversion configuration generation module;
step 103: verifying the structure, attribute and integrity of the converted interface function data to ensure the consistency of the interface function and the original interface control file;
step 104: after verification is completed, issuing interface function data and an analysis report;
the interface function data comprises two parts of contents: a bus message template and a signal template; the bus message template designs different attributes according to different types of buses, defines attribute constraints, and comprises source information, message names, message lengths, message types, message sending and receiving periods and message link information of messages; the signal template describes data information contained in each message, including a signal name, a signal ID, a signal source, position information of a signal, an alignment mode of a signal, format information of a signal, a resolution of a signal, a status bit of a signal, and association information of a signal and a message.
4. The avionics system multi-bus data conversion general processing system according to claim 2, characterized in that an application service data modeling module firstly constructs a conceptual data model according to the data interaction requirements of application software to generate a conceptual data view, then constructs a logical data model according to the conceptual data view to generate a logical data view, then constructs a platform data model according to the logical data view in combination with a platform communication mechanism to generate a platform data view, generates a portable application model unit model according to a framework template of basic element attributes of a platform, generates related codes and configurations under the portable application model unit model, and finally converts the codes and configurations into an application data model oriented to a data conversion function; the application data model comprises an application data template type, an application data template use and an application data template description; the application data template comprises a service data name, a service data type, a service data size, a service data position, service data source information, service data related description and special function data customized description.
5. The avionics system multi-bus data conversion general processing system according to claim 2, characterized in that the data conversion configuration generation module performs the following processes:
step 201: extracting interface function data and business data related mapping information facing to application software from the interface function data and application data model through an interface correlation tool;
step 202: extracting, converting and configuring related template variable part information of the interface function data and the business data related mapping information through a data conversion template generating tool to generate a data conversion configuration template file; the data conversion configuration template file comprises an AFDX bus message template, an AFDX data filtering selection template, an A429 bus message template, an A429 data filtering selection template, a CAN bus message template, a CAN data filtering selection template, a data validity verification template and a data format conversion precision resolving template, and an extension interface is provided for supporting the generation of templates of other buses;
step 203: and converting the data conversion configuration template file into a data conversion configuration file and a data communication configuration file through the data conversion configuration generation tool and the data communication configuration generation tool.
6. The general processing system for multi-bus data conversion of avionics system according to claim 2, characterized in that the integrated development tool environment for data conversion management further comprises a data conversion configuration verification module, a data positioning plug-in, a version and authorization management module and a control panel module;
the data conversion configuration verification module is used for verifying the data conversion configuration file and the data communication configuration file, and the data conversion configuration file and the data communication configuration file which pass the verification are used as loading and associated objects of the data conversion management middleware to reside in the onboard embedded target machine or simulation equipment of the onboard avionic system;
the data positioning plug-in module realizes positioning through a Wireshark service plug-in on the basis of the packet capturing and unpacking of the interface control file and can visually display the analysis result of the application function data;
the version and authorization management module is used for constructing a version file for each version of input and output of each module in the avionic system multi-bus data conversion general processing system and realizing the function of version management by managing the version files;
the control panel module provides a user interface for interaction between a user and other modules.
7. The avionics system multi-bus data conversion general processing system according to claim 1, characterized in that the onboard data conversion management middleware comprises a message association module, a message transceiver module, a CRC check module, an FC check module, a data format conversion module, a data precision calculation module, a data status bit check module, a data effective range determination module and a data filtering and selection module;
the message association module establishes a message transceiving channel between the application and the external bus by using the data communication configuration file, and initializes a communication port provided by the data communication configuration file so as to support the real-time data transmission in the platform integration and operation stages;
the message receiving and sending module receives/sends messages on a message receiving and sending channel established by the message association module according to the receiving/sending frequency defined by the interface function;
the CRC check module is used for performing CRC32 check on the received or to-be-sent message which is required to be checked, comparing the received or to-be-sent message with an original CRC32 check code of the input file, and verifying the correctness and the integrity of the received or to-be-sent message;
the FC verification module is used for performing FC verification on received or to-be-transmitted messages which are required to be verified, determining an FC verification code according to the transmission period, the reception period, the network data transmission delay and the jitter coefficient of the messages, comparing the FC verification code with the original FC verification code of the input file, and verifying the instantaneity and the validity of the received or to-be-transmitted messages;
the data format conversion module is used for automatically converting the interface and the application service data format;
the data precision calculating module is used for calculating the precision of partial data of partial bus received from the message transceiving channel;
the data state bit checking module is used for checking the state bit of the bus data;
the data effective range checking module is used for checking the effective range of the bus data;
and the data filtering and selecting module is used for filtering data with different functions of different buses according to the data filtering and selecting requirements of different dimensions, and selecting the data of an effective data source to transmit to the application software.
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