CN107783934B

CN107783934B - Airborne multi-channel ARINC429 bus real-time acquisition and data filtering method

Info

Publication number: CN107783934B
Application number: CN201610780863.4A
Authority: CN
Inventors: 李国星; 高志远; 李盘文; 安都勋
Original assignee: Chinese Flight Test Establishment
Current assignee: Chinese Flight Test Establishment
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2021-05-28
Anticipated expiration: 2036-08-30
Also published as: CN107783934A

Abstract

The invention relates to the field of test flight data acquisition of an airborne ARINC429 bus, in particular to a real-time acquisition and data filtering method of an airborne multi-channel ARINC429 bus. A traditional ARINC429 bus acquisition module usually adopts a separated component or a pure FPGA logic circuit, the separated component circuit is large in size, large in power consumption and expensive in protocol chip, and the pure FPGA logic circuit is poor in user programmable flexibility and brings inconvenience to practical application. The invention provides a solution scheme taking a DSP and an FPGA as core architectures, which fully utilizes the flexibility of the DSP and the rapid parallelism of the FPGA, realizes the real-time processing and screening of multi-channel ARINC429 bus data, and sends the data to a back board bus in a test flight test system according to a specific format and a sampling rate for the test flight test system to call. And the processing speed of screening the multichannel ARINC429 data words is greatly increased in a space exchange speed mode by a table look-up mode.

Description

Airborne multi-channel ARINC429 bus real-time acquisition and data filtering method

Technical Field

The invention relates to the field of test flight data acquisition of an airborne ARINC429 bus, in particular to a real-time acquisition and data filtering method of an airborne multi-channel ARINC429 bus.

Background

In flight tests, an airborne ARINC429 bus is widely applied to various civil airplanes and military airplanes, test flight data acquisition often involves real-time acquisition and data filtering of the multichannel ARINC429 bus, and processing results are often sent to the ground through a telemetry link for real-time monitoring. Therefore, how to efficiently collect the multichannel ARINC429 bus signals is a research subject with practical engineering value.

In a test flight test system, an ARINC429 bus acquisition is often a module in the system. The test system can incorporate ARINC429 bus data into a data link of the test flight test system, and data sharing among devices is achieved. However, the traditional ARINC429 bus acquisition module usually adopts a separate component or a pure FPGA logic circuit, the separate component circuit has large volume, large power consumption and expensive protocol chip, and the pure FPGA logic circuit has poor user-programmable flexibility and brings inconvenience to practical application.

Disclosure of Invention

Under the framework of the test flight test system, the invention provides a solution taking the DSP and the FPGA as core frameworks, fully utilizes the flexibility of the DSP and the rapid parallelism of the FPGA, realizes the real-time processing and screening of the multichannel ARINC429 bus data, and sends the data to a back board bus in the test flight test system according to a specific format and a sampling rate for the test flight test system to call. In the architecture of the test flight test system, data can be transmitted to the next-level device through the backplane bus under the scheduling of the main control device.

An airborne multi-channel ARINC429 bus real-time acquisition and data filtering method is realized by a hardware platform with a DSP and an FPGA as a framework, the front end of the method is composed of 8 ARINC429 bus driving chips and used for converting ARINC429 level codes, and the data filtering method comprises the following steps:

first, a mapping configuration table is preset

Constructing 4 mapping tables according to the field values of a Lable field, an SDI field and an SSM field of an ARINC429 bus configured by a user, wherein the mapping table 1 stores the Lable configured by the user and a corresponding filtering mode, and comprises the steps of writing a Lable identification value into an address pointed by the value of the Lable and combining and filtering the SDI field and the SSM field; mapping table 2 stores the configuration of filtering the lab field, the SDI field and the SSM field; the mapping table 3 stores the configuration of filtering the Lable field and the SSM field; the mapping table 4 stores the configuration of filtering the Lable field and the SDI field;

then, data filtering

According to the value of a Lable field extracted from real-time data, searching whether a Lable configuration value exists in a mapping table 1, and if the identification value is false, discarding the data; if the identification value is true, entering a corresponding mapping table 2, a mapping table 3 or a mapping table 4 by combining a combined filtering mode of SDI fields and SSM fields; when the filtering mode is that the Lable field, the SDI field and the SSM field are required to be filtered, addressing in a mapping table 2 by taking data combined by the Lable field, the SDI field and the SSM field as an address, discarding the data if the value obtained by addressing is false, and keeping the data if the value obtained by addressing is true; when the filtering mode is that a Lable field and an SSM field need to be filtered, addressing in a mapping table 3 according to data combined by the Lable field and the SSM field as an address, if the value obtained by addressing is false, discarding the data, and if the value obtained by addressing is true, retaining the data; when the filtering mode is that the Lable field and the SDI field need to be filtered, addressing in a mapping table 4 by taking data combined by the Lable field and the SDI field as an address, if the value obtained by addressing is false, discarding the data, and if the value obtained by addressing is true, retaining the data;

and re-sending the filtered ARINC429 data back to a cache circuit of the FPGA according to a specified format and address, and reading by a back board bus of the standby load test system, thereby completing the real-time acquisition and filtration of the onboard eight-channel ARINC429 data words.

The invention utilizes the characteristics of rapidness and flexibility of a DSP program, and greatly accelerates the processing speed of screening the multichannel ARINC429 data words in a space exchange speed mode by a table look-up mode.

Drawings

FIG. 1 is a system framework diagram of the present invention;

FIG. 2 is a diagram of a mapping table structure according to the present invention.

Detailed Description

A real-time acquisition and data filtering method for an airborne multichannel ARINC429 bus is realized by a hardware platform with a DSP and an FPGA as a framework, the front end of the hardware platform is composed of 8 ARINC429 bus driving chips, an ARINC429 level code is converted into an LVTTL level, the analysis of an ARINC429 data word is completed by an ARINC429 protocol IP in the FPGA, the analyzed data is stored in an FPGA cache circuit according to a channel, a DSP program inquires the storage condition of the ARINC429 data word in each channel cache circuit in turn through an XINTF bus, and the ARINC429 data word is read into the cache of the DSP.

In order to improve the filtering efficiency, the invention provides a data filtering method with space exchange efficiency, which is used for quickly filtering ARINC429 data words according to the judgment condition preset by a user, namely, filtering the data by taking the data as an address to be quickly looked up, and screening the ARINC429 data words required by the user from an ARINC429 bus in real time.

The data filtering method comprises the following steps:

first, a mapping configuration table is preset

And constructing 4 mapping tables according to the ARINC429 bus Lable field, the SDI field and the SSM field value configured by the user, and storing ARINC429 bus data word information configured by the user. The mapping table 1 stores the Lable configured by the user and the corresponding filtering mode, including writing the Lable identification value in the address pointed by the value of the Lable, and the combined filtering mode of the SDI field and the SSM field. Mapping table 2 stores the configuration of filtering the lab field, the SDI field and the SSM field; the mapping table 3 stores the configuration of filtering the Lable field and the SSM field; the mapping table 4 stores the configuration of filtering the lab field and the SDI field.

Then, data filtering

According to the value of a Lable field extracted from real-time data, searching whether a Lable configuration value exists in a mapping table 1, and if the identification value is false, discarding the data; and if the identification value is true, combining a combined filtering mode of SDI fields and SSM fields, and entering a corresponding mapping table 2, a mapping table 3 or a mapping table 4. When the filtering mode is that all the Lable field, the SDI field and the SSM field need to be filtered, combining the fields of the Lable field, the SDI field and the SSM field in the data, addressing in a mapping table 2 by taking the combined data as an address, discarding the data if the value obtained by addressing is false, and keeping the data if the value obtained by addressing is true; when the filtering mode is that the Lable field and the SSM field need to be filtered, combining the Lable field and the SSM field value in the data, addressing in a mapping table 3 by taking the combined data as an address, discarding the data if the value obtained by addressing is false, and keeping the data if the value obtained by addressing is true; when the filtering mode is that the Lable field and the SDI field need to be filtered, the fields of the Lable field and the SDI field in the data are combined, the combined data is used as an address to be addressed in the mapping table 4, if the value obtained by addressing is false, the data is discarded, and if the value obtained by addressing is true, the data is retained.

Claims

1. An airborne multi-channel ARINC429 bus real-time acquisition and data filtering method is characterized in that: the data filtering method is realized by a hardware platform with a DSP and an FPGA as a framework, the front end of the data filtering method is composed of 8 ARINC429 bus driving chips and used for converting ARINC429 level codes, and the data filtering method comprises the following steps:

first, a mapping configuration table is preset

Constructing 4 mapping tables according to the field values of a Lable field, an SDI field and an SSM field of an ARINC429 bus configured by a user, wherein the mapping table 1 stores the Lable configured by the user and a corresponding filtering mode, and comprises the steps of writing the field value of the Lable into an address pointed by the value of the Lable and combining and filtering the SDI field and the SSM field; mapping table 2 stores the configuration of filtering the lab field, the SDI field and the SSM field; the mapping table 3 stores the configuration of filtering the Lable field and the SSM field; the mapping table 4 stores the configuration of filtering the Lable field and the SDI field;

then, data filtering

According to the Lable field value extracted from the real-time data, whether the Lable field value exists or not is searched in a mapping table 1, and if the field value is false, the data is discarded; if the field value is true, entering a corresponding mapping table 2, a mapping table 3 or a mapping table 4 by combining with a combined filtering mode of SDI and SSM fields; when the filtering mode is that the Lable field, the SDI field and the SSM field are required to be filtered, addressing in a mapping table 2 by taking data combined by the Lable field, the SDI field and the SSM field as an address, discarding the data if the value obtained by addressing is false, and keeping the data if the value obtained by addressing is true; when the filtering mode is that a Lable field and an SSM field need to be filtered, addressing in a mapping table 3 according to data combined by the Lable field and the SSM field as an address, if the value obtained by addressing is false, discarding the data, and if the value obtained by addressing is true, retaining the data; when the filtering mode is that the Lable field and the SDI field need to be filtered, addressing in a mapping table 4 by taking data combined by the Lable field and the SDI field as an address, if the value obtained by addressing is false, discarding the data, and if the value obtained by addressing is true, retaining the data;