Aircraft landing gear folding and unfolding performance monitoring system and method

Abstract

The invention relates to an aircraft landing gear folding and unfolding performance monitoring system which comprises a data source module, a data processing module and a data output module. Wherein the data source module comprises an undercarriage control computer, a wireless rapid storage recorder and a wireless rapid storage recorder server; the undercarriage control computer is connected with the wireless rapid storage recorder through a line, and the wireless rapid storage recorder is connected with the wireless rapid storage recorder server through a line; the data processing module comprises a flight quality analysis system, a MySQL database and data processing software; the wireless rapid storage recorder server is connected with the flight quality analysis system through the aircraft communication addressing and reporting system, the flight quality analysis system is wirelessly connected with the MySQL database, and the MySQL database is wirelessly connected with the data processing software. Compared with the prior art, the method has the advantages of carrying out fault alarm in advance, improving the alarm accuracy and the like.

Description

Technical Field

[0001] The present invention relates to the field of civil aviation, and in particular to a system and method for monitoring the retraction and extension performance of an aircraft landing gear. Background Art

[0002] The aircraft landing gear is an accessory device at the bottom of the aircraft used to support the aircraft during takeoff and landing or taxiing on the ground (water surface) and to move on the ground (water surface). The aircraft landing gear is the only component that supports the entire aircraft and is an indispensable part of the aircraft. A certain airline's A330 fleet has experienced multiple failures in the landing gear retraction and extension system, resulting in aviation unsafe incidents such as the aircraft returning to the base or gravity lowering the landing gear in the air, which has had a negative impact on the aircraft's airworthiness safety and passenger services.

[0003] Modern civil airliners are equipped with landing gear control computers. During flight, the computer monitors the landing gear retraction and extension process. If there is an abnormality in the landing gear retraction and extension process, the computer will generate fault information and alert the pilot through the flight warning system. However, this method can only provide a reminder after the fault occurs, and cannot realize the function of discovering the performance degradation trend in advance. If this performance degradation trend can be captured before the fault occurs, and the fault can be eliminated in advance, the occurrence of the fault can be avoided. Therefore, the prior art lacks a technical solution to the problem of early warning of the status of the aircraft landing gear before the fault occurs. Summary of the invention

[0004] The purpose of the present invention is to provide an aircraft landing gear retraction and extension performance monitoring system and method in order to overcome the defects of the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] On the one hand, the present invention discloses an aircraft landing gear retraction and extension performance monitoring system, including a data source module, a data processing module and a data output module;

[0007] Wherein, the data source module includes a landing gear control computer, a wireless fast storage recorder and a wireless fast storage recorder server; the landing gear control computer is connected to the wireless fast storage recorder through a line, and the wireless fast storage recorder is connected to the wireless fast storage recorder server through a line;

[0008] The data processing module includes a flight quality analysis system, a MySQL database and data processing software; the wireless fast storage recorder server is connected to the flight quality analysis system through an aircraft communication addressing and reporting system, the flight quality analysis system is connected to the MySQL database wirelessly, and the MySQL database is connected to the data processing software wirelessly.

[0009] Furthermore, the landing gear control computer is used to collect status data of the aircraft landing gear in real time, and to feed back the status data of the aircraft landing gear to the wireless fast storage recorder in real time.

[0010] Furthermore, the wireless fast storage recorder is used to record the flight data of the aircraft during each flight process, including the status data of the aircraft landing gear; after each flight process, the wireless fast storage recorder automatically transmits the recorded flight data to the wireless fast storage recorder server through the network.

[0011] Furthermore, the wireless fast storage recorder server is used to store the flight data of the aircraft.

[0012] Furthermore, the flight quality analysis system is used to obtain the status data of the aircraft landing gear from the flight data on the wireless fast storage recorder server.

[0013] Furthermore, the MySQL database is used to store the status data of the aircraft landing gear acquired by the flight quality analysis system.

[0014] Furthermore, the data processing software is used to screen and calculate the status data of the aircraft landing gear, identify the alarm data by comparing the status data with the set monitoring standards and alarm thresholds, and transmit the alarm data to the data output module after collating them.

[0015] Furthermore, the monitoring standards include normal monitoring conditions, key monitoring conditions and abnormal alarm conditions; the alarm thresholds are specifically that the landing gear retraction process time exceeds 20.0 seconds; the landing gear lowering process time exceeds 25.0 seconds.

[0016] Furthermore, the data output module is used to send the alarm data from the data processing software to the user terminal via email.

[0017] In a second aspect, the present invention discloses a method for monitoring the retraction and extension performance of an aircraft landing gear. The method is implemented based on the above system and comprises the following steps:

[0018] Step 1, obtaining the state data of the aircraft landing gear through the landing gear control computer;

[0019] Step 2, recording the state data of the aircraft landing gear in a wireless fast storage recorder;

[0020] Step 3, transmitting the aircraft landing gear status data in the wireless fast storage recorder to the wireless fast storage recorder server via the network;

[0021] Step 4: Use the flight quality analysis system to obtain the status data of the aircraft landing gear in the wireless fast storage recorder server;

[0022] Step 5: Use the MySQL database to store the aircraft landing gear status data obtained by the flight quality analysis system;

[0023] Step 6: Use data processing software to filter and calculate the aircraft landing gear status data in the MySQL database, identify the alarm data by comparing the status data with the set monitoring standard and alarm threshold, and transmit the alarm data to the data output module after collating;

[0024] Step 7: Use the data output module to send the alarm data from the data processing software to the user terminal in the form of email.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention uses data processing software to screen and calculate the status data of the aircraft landing gear, identify the alarm data, and transmit the alarm data to the data output module after collating it. It can issue a fault alarm in advance before the fault occurs, avoid the fault transmission, and eliminate the fault, thereby avoiding flight accidents caused by aircraft landing gear failure.

[0027] (2) The present invention sets different monitoring standards for different situations and sets different alarm thresholds accordingly, thereby effectively distinguishing between faults and non-faults, improving the accuracy of fault identification, and ensuring that the system is applicable to a variety of different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 The aircraft landing gear retraction and extension performance trend diagram of the present invention;

[0030] Figure 3 The distribution statistics of the aircraft landing gear retraction and extension time of the present invention;

[0031] Figure 4 This is a statistical diagram of aircraft landing gear retraction and extension failures of the present invention. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] Example 1

[0034] The landing gear retraction and extension system failures of a certain airline's A330 fleet have occurred many times, resulting in aviation unsafe incidents such as aircraft return or gravity landing gear extension in the air, which has had a negative impact on the aircraft's airworthiness safety and passenger services. Using Python to analyze the landing gear system data of a certain airline's A330 fleet from 2017 to 2019, it was found that the landing gear retraction and extension system had a performance degradation trend to varying degrees before most failures occurred.

[0035] This embodiment discloses a system for monitoring the retraction and extension performance of an aircraft landing gear. Figure 1 As shown, the system includes three modules: data source, data processing and data output. The three modules are connected in sequence, that is, the data source module is connected to the data processing module, and the data processing module is connected to the data output module. Specifically, the wireless fast storage recorder server in the data source module is connected to the flight quality analysis system in the data processing module through the Aircraft Communications Addressing and Reporting System (ACARS, a digital data link system that transmits short messages between aircraft and ground stations via radio or satellite); the data processing software in the data processing module is connected to the data output module via wireless.

[0036] Furthermore, the data source module is composed of three parts, namely, a landing gear control computer, a WQAR (Wireless Quick Access Recorder) and a WQAR server. The landing gear control computer is connected to the wireless quick access recorder through a line, and the wireless quick access recorder is connected to the wireless quick access recorder server through a line.

[0037] The landing gear control computer records the data of the aircraft landing gear and sends the recorded data of the aircraft landing gear to the WQAR. In addition, the landing gear control computer can also feed back the real-time status of the landing gear to the landing gear control computer.

[0038] WQAR is an airborne device used to monitor and record a large number of flight parameters and data. It is a data recorder on the aircraft. It can collect hundreds of data at the same time, covering most of the parameters of the aircraft's operating quality. WQAR monitoring is a scientific and effective technical means to ensure flight safety and improve operational efficiency. Its monitoring results are an important basis for flight technical inspections, safety assessments, safety incident investigations and aircraft maintenance. With the help of WQAR, airlines can promptly discover problems in flight crew control, engine operating conditions, and aircraft performance, analyze and find the causes, grasp safety trends, and take targeted measures to eliminate potential accidents and ensure flight safety.

[0039] In this embodiment, WQAR is used to record the data of various systems of the aircraft during each flight process, including the data of the landing gear system.

[0040] The WQAR server is a server used by airlines to store aircraft flight data. After each flight process, WQAR automatically transmits the recorded data to the WQAR server through the network.

[0041] The data processing module also consists of three parts, namely the flight quality analysis system, MySQL database and data processing software. The flight quality analysis system is connected to the MySQL database via wireless, and the MySQL database is connected to the data processing software via wireless.

[0042] The flight quality analysis system of this embodiment is a flight quality analysis system (AIRFASE) for all civil aircraft jointly launched by Airbus of France and Teledyne of the United States. AIRFASE is a QAR decoding tool applicable to all aircraft types, and has the characteristics of automatically generating statistical reports and trend information.

[0043] AIRFASE used in this embodiment can automatically read the data of the landing gear system on the WQAR server from the local server, calculate the characteristic values ​​of the landing gear retraction and extension, such as the door lock release time, the landing gear lock release time, the landing gear retraction lock time, the door retraction lock time, etc., and save these characteristic values ​​in the local MySQL database so that the data can be called at any time.

[0044] MySQL database is one of the most popular relational databases in the world and is applicable to various application scenarios. In this embodiment, MySQL is used to establish a database to store the landing gear system data obtained by AIRFASE.

[0045] like Figure 2 As shown in the figure, it was detected that the total duration of the landing gear retraction process of a certain A330 aircraft frequently exceeded 20 seconds and fluctuated between 20 and 21 seconds since late February 2021. On March 22, the total duration suddenly increased to 27 seconds, and the performance monitoring alarm was triggered continuously. After timely maintenance, the total duration of the landing gear retraction process dropped back and stabilized between 19 and 20 seconds, and the landing gear retraction performance returned to normal.

[0046] In order to monitor the performance of the landing gear retraction system, it is necessary to understand the timing of the landing gear retraction and extension of the fleet. Figure 3As shown in the figure, the landing gear retraction and extension data of 146,099 flights of the A330 fleet of an airline from 2017 to 2019 were collected, and the Python programming language was used for data cleaning and statistics. By analyzing the data, 99.23% of the landing gear retraction process time is concentrated between 15.0 seconds and 18.0 seconds, and 99.09% of the landing gear extension process time is concentrated between 15.0 seconds and 17.0 seconds. This shows that the operating time law of the landing gear retraction and extension system is relatively stable.

[0047] According to the summary of the time rules of landing gear retraction and extension, this embodiment sets the monitoring standard and alarm threshold accordingly. Among them, the monitoring standard is divided into three levels: normal monitoring situation, key monitoring situation and abnormal alarm situation. The normal monitoring situation is that the landing gear retraction process time is between 15.0 seconds and 18.0 seconds; the landing gear lowering process time is between 15.0 seconds and 17.0 seconds. The key monitoring situation is that the landing gear retraction process time is between 18.0 seconds and 20.0 seconds; the landing gear lowering process time is between 17.0 seconds and 25.0 seconds. The abnormal alarm situation is that the landing gear retraction process time exceeds 20.0 seconds; the landing gear lowering process time exceeds 25.0 seconds. When it is determined to be an abnormal alarm situation, timely measures need to be taken to deal with it. And the landing gear retraction process time exceeds 20.0 seconds; the landing gear lowering process time exceeds 25.0 seconds is set as the alarm threshold.

[0048] The data processing software is the core part of the present invention. It filters, screens and calculates the landing gear system data. By comparing the status data with the set monitoring standards and alarm thresholds, it identifies the alarm data that meets the abnormal alarm conditions and passes it to the data output module after sorting it out.

[0049] The data output module uses email to send the alarm data from the data processing software in the data processing module to the user terminal, completing the early warning function before the failure occurs.

[0050] like Figure 4 As shown, the aircraft landing gear retraction and extension performance monitoring system disclosed in this embodiment has been put into use since July 2020, and has successfully captured the performance degradation of the landing gear retraction and extension systems of 4 aircraft. Before the failure occurred, it intervened in advance to troubleshoot the failure, avoiding the occurrence of gravity-release landing gear and return to alternate landing in the air. Before the present invention was put into use, the A330 fleet had landing gear retraction and extension system failures every year. After the present invention was put into use, such incidents have never occurred. This proves that the present invention has the function of early warning of failures and avoiding aviation accidents.

[0051] Example 2

[0052] This embodiment provides a method for monitoring the retraction and extension performance of an aircraft landing gear. The method needs to be implemented by using a system for monitoring the retraction and extension performance of an aircraft landing gear provided in this embodiment. The method includes the following steps:

[0053] Step 1: Obtain the status data of the aircraft landing gear through the landing gear control computer.

[0054] Step 2: Record the status data of the aircraft landing gear in a wireless fast storage recorder.

[0055] Step 3: Transmit the aircraft landing gear status data in the wireless fast storage recorder to the wireless fast storage recorder server via the network.

[0056] Step 4: Use the flight quality analysis system to obtain the aircraft landing gear status data in the wireless fast storage recorder server.

[0057] Step 5: Use the MySQL database to store the aircraft landing gear status data obtained by the flight quality analysis system.

[0058] Step 6: Use data processing software to filter and calculate the status data of the aircraft landing gear in the MySQL database, identify the alarm data by comparing the status data with the set monitoring standards and alarm thresholds, and transmit the alarm data to the data output module after sorting.

[0059] Among them, the monitoring standards are divided into three levels: normal monitoring conditions, key monitoring conditions and abnormal alarm conditions. The normal monitoring condition is that the landing gear retraction process time is between 15.0 seconds and 18.0 seconds; the landing gear lowering process time is between 15.0 seconds and 17.0 seconds. The key monitoring condition is that the landing gear retraction process time is between 18.0 seconds and 20.0 seconds; the landing gear lowering process time is between 17.0 seconds and 25.0 seconds. The abnormal alarm condition is that the landing gear retraction process time exceeds 20.0 seconds; the landing gear lowering process time exceeds 25.0 seconds. When it is determined to be an abnormal alarm condition, timely measures need to be taken to deal with it. And the landing gear retraction process time exceeding 20.0 seconds; the landing gear lowering process time exceeding 25.0 seconds is set as the alarm threshold.

[0060] Step 7: Use the data output module to send the alarm data from the data processing software to the user terminal in the form of email.

[0061] The method provided in this embodiment can effectively monitor the retraction and extension performance of the aircraft landing gear, and has an accurate fault identification accuracy rate. The method effectively avoids the misidentification of non-faults by classifying the monitoring conditions. The method can reduce the failure rate of the aircraft landing gear and ensure the safety of civil aviation.

[0062] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An aircraft landing gear retraction and extension performance monitoring system, characterized in that: It includes a data source module, a data processing module and a data output module; Wherein, the data source module includes a landing gear control computer, a wireless fast storage recorder and a wireless fast storage recorder server; the landing gear control computer is connected to the wireless fast storage recorder through a line, and the wireless fast storage recorder is connected to the wireless fast storage recorder server through a line; The data processing module includes a flight quality analysis system, a MySQL database and data processing software; the wireless fast storage recorder server is connected to the flight quality analysis system through an aircraft communication addressing and reporting system, the flight quality analysis system is connected to the MySQL database wirelessly, and the MySQL database is connected to the data processing software wirelessly.

2. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The landing gear control computer is used to collect the state data of the aircraft landing gear in real time, and feed back the state data of the aircraft landing gear to the wireless fast storage recorder in real time.

3. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The wireless fast storage recorder is used to record the flight data of the aircraft in each flight process, including the status data of the aircraft landing gear; after each flight process, the wireless fast storage recorder automatically transmits the recorded flight data to the wireless fast storage recorder server through the network.

4. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The wireless fast storage recorder server is used to store the flight data of the aircraft.

5. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The flight quality analysis system is used to obtain the state data of the aircraft landing gear from the flight data on the wireless fast storage recorder server.

6. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The MySQL database is used to store the status data of the aircraft landing gear obtained by the flight quality analysis system.

7. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The data processing software is used to screen and calculate the status data of the aircraft landing gear, identify the alarm data by comparing the status data with the set monitoring standards and alarm thresholds, and transmit the alarm data to the data output module after collating them.

8. The aircraft landing gear retraction and extension performance monitoring system according to claim 7, characterized in that: in, The monitoring standards include normal monitoring conditions, key monitoring conditions and abnormal alarm conditions; the alarm threshold is specifically that the landing gear retraction process time exceeds 20.0 seconds; the landing gear lowering process time exceeds 25.0 seconds.

9. The aircraft landing gear retraction and extension performance monitoring system according to claim 1, characterized in that: The data output module is used to send the alarm data from the data processing software to the user terminal by means of e-mail.

10. A method for monitoring the retraction and extension performance of an aircraft landing gear, characterized in that: The method is implemented based on the system described in any one of claims 1 to 9, and comprises the following steps: Step 1, obtaining the state data of the aircraft landing gear through the landing gear control computer; Step 2, recording the state data of the aircraft landing gear in a wireless fast storage recorder; Step 3, transmitting the aircraft landing gear status data in the wireless fast storage recorder to the wireless fast storage recorder server via the network; Step 4: Use the flight quality analysis system to obtain the status data of the aircraft landing gear in the wireless fast storage recorder server; Step 5: Use the MySQL database to store the aircraft landing gear status data obtained by the flight quality analysis system; Step 6: Use data processing software to filter and calculate the state data of the aircraft landing gear in the MySQL database, identify the alarm data by comparing the state data with the set monitoring standard and alarm threshold, and transmit the alarm data to the data output module after collating; Step 7: Use the data output module to send the alarm data from the data processing software to the user terminal in the form of email.

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