Method and device for analyzing brake defects and evaluating consequences based on flight commentaries

Abstract

This invention provides a method and apparatus for brake defect analysis and consequence evaluation based on flight reviews. The method includes: identifying and classifying brake-related problems based on flight review information; conducting cause and defect analysis to obtain equipment and indicators for resolving brake-related problems; designing brake verification task scenarios to obtain verification scenarios; considering the progressiveness and comprehensiveness of defect verification within the verification scenarios to form a four-dimensional verification method; implementing verification to form aircraft defect verification conclusions and design improvement suggestions. Based on the equipment and indicators in the aircraft defect verification conclusions, a set of defect consequence evaluation factors is established, and the consequence level of each element is determined. The consequence level is used to instruct pilots on flight operations. This invention is highly operable and can simply, accurately, and in a closed loop link flight review information to aircraft brake defect analysis and consequence prediction, helping to improve aircraft flight test efficiency and flight safety, serving the improvement of aircraft design level and military operational use.

Description

Technical Field

[0001] This invention relates to the field of aircraft defect analysis, and in particular to a method and apparatus for brake defect analysis and consequence evaluation based on flight reviews. Background Technology

[0002] After a flight mission, pilots are required to provide a comprehensive evaluation of their experience with the aircraft's various systems, human-machine (hardware and software) collaboration, human-environment interaction, and human-equipment integration. This evaluation is collectively referred to as post-flight review information. Pilot post-flight review information covers various aspects, including the aircraft's hardware and software interfaces, functional performance, and ergonomics. It directly and comprehensively reflects various existing or potential problems with the aircraft, and is of great significance to flight test efficiency and flight safety.

[0003] However, post-flight assessments are often qualitatively vague, such as excessive jerkiness when braking or high effort required to operate the control lever. This may result in an overabundance of onboard equipment mentioned in the assessment, making it impossible to pinpoint the specific equipment requiring adjustment, directly identify the problems or defects, or ensure that performance parameters do not reflect the issues. Consequently, the utilization rate of flight assessment information is low, hindering the tracing and resolution of defects. This directly impacts flight efficiency, increases pilot workload, increases the risk of human error, and could even lead to flight safety accidents.

[0004] Currently, there is almost no research on how to trace and locate specific aircraft system defects and consequences from vague qualitative flight review information. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a method and device for brake defect analysis and consequence evaluation based on flight reviews, which fully explores the pilot's post-flight review information, traces from qualitative information to system defect analysis, provides defect consequence evaluation and subsequent improvement suggestions, ensures the safety and efficiency of aircraft test flights, improves the level of aircraft design, and serves the combat use of the troops.

[0006] The technical solution of the present invention is as follows: The first aspect of the present invention provides a method for brake defect analysis based on flight review, comprising the following steps:

[0007] S101. Based on the flight review information, identify braking-related problems, classify all braking-related problems according to function, and for braking-related problems involving functional types with normal performance indicators, conduct a four-dimensional analysis of the causes and defects of the problems from the perspectives of system, function, equipment, and indicators, and obtain the equipment and indicators to solve the braking-related problems.

[0008] S102. Based on the characteristics of the equipment and aircraft and the combat mission of the aircraft, a verification scenario for braking is designed based on the combination of personnel and equipment to obtain the verification scenario.

[0009] S103. In the verification scenario, considering the progressiveness and comprehensiveness of defect verification, a four-dimensional verification method is formed.

[0010] S104. The four-dimensional verification method is adopted to carry out verification, obtain verification results, and compare and analyze the verification results with similar aircraft models to form aircraft defect verification conclusions and design improvement suggestions.

[0011] Optionally, the types of brake-related problems include: brake handling, brake failure alarm, brake temperature, and brake noise.

[0012] Optional elements of mission scenario design include: in the horizontal dimension, the equipment characteristics of the braking system, the aircraft's combat mission and mission usage requirements; and in the vertical dimension, the pilot operation, aircraft equipment, and mission environment involved in the integration of personnel and equipment.

[0013] Optionally, the four-dimensional verification method includes: on-board parameter measurement, simulator test verification, ground taxiing operation verification, and in-flight test verification, integrating qualitative and quantitative indicators, and carrying out special and combined test verification.

[0014] Optionally, the verified pedal usability evaluation indicators include pedal size rationality, pedal space rationality, pedal force appropriateness, and seat-pedal matching.

[0015] Optionally, the verified results can be compared and analyzed with similar aircraft models. Here, similar aircraft models refer to a series of modified aircraft with similar combat missions and mission profiles, and similar equipment platform structures.

[0016] A second aspect of the present invention provides a method for evaluating the consequences of braking defects based on flight reviews, the method comprising:

[0017] S105. Based on the equipment and indicators in the aircraft defect verification conclusion, establish a set of defect consequence evaluation factors;

[0018] The conclusions on aircraft defect verification are obtained using the method described in any one of the first aspects;

[0019] S106. Determine the severity and likelihood of defect consequences for each element in the defect consequence evaluation factor set.

[0020] S107. Based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set, determine the consequence level of each element. The consequence level is used to instruct the pilot on flight operations.

[0021] Optionally, determining the probability of defect consequences for each element in the defect consequence evaluation factor set includes:

[0022] Based on all associated historical flight review information for each element in the defect consequence evaluation factor set, the likelihood of defect consequences is determined.

[0023] Optionally, the set of evaluation factors for the consequences of defects includes: the impact of equipment and indicators on the pilot's situational awareness, workload, functional implementation, performance level, and ergonomics.

[0024] Optionally, for each of the identified different levels of defect consequences, specific explanations and handling suggestions can be provided from multiple dimensions, including impact on flight safety, aircraft systems, and pilot operations.

[0025] A third aspect of the present invention provides a brake defect analysis device based on flight review, comprising:

[0026] The problem and defect analysis unit is used to identify braking-related problems based on flight review information. All braking-related problems are classified according to function. For braking-related problems involving functional types with normal performance indicators, the unit conducts problem cause and defect analysis from four dimensions: system, function, equipment, and indicator, and obtains the equipment and indicators to solve the braking-related problems.

[0027] The verification scenario design unit is used to design a verification scenario for braking based on the characteristics of the equipment and aircraft and the aircraft's combat mission, and to obtain the verification scenario.

[0028] The verification method selection unit is used to consider the progressiveness and comprehensiveness of defect verification in the verification scenario, forming a four-dimensional verification method.

[0029] The verification result comparison unit adopts a four-dimensional verification method to carry out verification, obtain verification results, and compare and analyze the verification results with similar aircraft models to form aircraft defect verification conclusions and design improvement suggestions.

[0030] A fourth aspect of the present invention provides a brake defect consequence evaluation device based on flight assessment, comprising:

[0031] The factor set acquisition unit is used to establish a factor set for evaluating the consequences of defects based on the equipment and indicators in the aircraft defect verification conclusions.

[0032] The conclusions on aircraft defect verification are obtained using the method described in any one of the first aspects;

[0033] The consequences analysis unit is used to determine the severity and likelihood of the consequences of defects for each element in the defect consequences evaluation factor set.

[0034] The consequence level acquisition unit is used to determine the consequence level of each element based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set; the consequence level is used to instruct the pilot on flight operations.

[0035] The beneficial effects of this application are: 1) Fully utilizing and tapping into the subjective evaluation information of pilots to improve the efficiency of flight tests;

[0036] 2) Based on flight review information, identify typical system problems, conduct problem cause and defect analysis from four dimensions: "system-function-equipment-indicators", link them to aircraft defects, and achieve traceability from subjective qualitative information to objective defect analysis;

[0037] 3) Based on the needs of equipment use and combat, design verification mission scenarios from the perspective of human-equipment integration, form a four-dimensional verification method, propose improvement suggestions, and effectively improve the level of aircraft design.

[0038] 4) Verification planning and implementation were carried out in conjunction with specific test flight subjects, and the verification results were compared and analyzed with similar aircraft models to verify the effectiveness and operability of the method;

[0039] 5) A defect consequence evaluation level was established, which analyzes the severity and probability of defect consequences at two levels. This makes it easier for pilots to perceive and avoid subsequent flight risks, better ensures flight safety, and serves the combat use of the troops. Attached Figure Description

[0040] Figure 1 This is a schematic flowchart for aircraft defect analysis and consequence assessment based on flight reviews. Detailed Implementation

[0041] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments.

[0042] Figure 1 This is a schematic flowchart illustrating the brake defect analysis and consequence evaluation based on flight reviews, as per an embodiment of the present invention. Figure 1 The method shown includes the following steps:

[0043] S101. Based on the flight review information, identify braking-related problems, classify all braking-related problems according to function, and for braking-related problems involving functional types with normal performance indicators, conduct a four-dimensional analysis of the causes and defects of the problems from the perspectives of system, function, equipment, and indicators, and obtain the equipment and indicators to solve the braking-related problems.

[0044] S102. Based on the characteristics of the equipment and aircraft and the combat mission of the aircraft, a verification scenario for braking is designed based on the combination of personnel and equipment to obtain the verification scenario.

[0045] S103. In the verification scenario, considering the progressiveness and comprehensiveness of defect verification, a four-dimensional verification method is formed.

[0046] S104. The four-dimensional verification method is adopted to carry out verification, obtain verification results, and compare and analyze the verification results with similar aircraft models to form aircraft defect verification conclusions and design improvement suggestions.

[0047] S105. Based on the equipment and indicators in the aircraft defect verification conclusion, establish a set of defect consequence evaluation factors;

[0048] S106. Determine the severity and probability level of the defect consequences for each element in the defect consequence evaluation factor set.

[0049] S107. Based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set, determine the consequence level of each element. The consequence level is used to instruct the pilot on flight operations.

[0050] Taking the braking system of a certain type of aircraft during the flight test phase as an example, this invention is introduced, specifically including the following steps:

[0051] Step 1: Analysis of typical problem causes and defects

[0052] For example, after multiple test flights, multiple post-flight reviews can be obtained. The flight crew mentioned a total of 34 issues related to the braking system in the multiple post-flight reviews of this type of aircraft. Analyzing the pilots' reviews of the braking system, the braking system issues can be classified into four main categories: brake controllability, brake failure and warning, brake temperature, and brake noise.

[0053] In this process, performance indicators are analyzed according to type. If problems are found, they are directly modified. If the performance indicators are normal, the defects cannot be directly or intuitively identified.

[0054] For braking-related issues involving functional types with normal performance indicators, this invention conducts a four-dimensional analysis of the causes and defects of the problems from the perspectives of system, function, equipment, and indicators.

[0055] For example, from a system perspective, the other systems involved in the post-flight review can be correlated with the braking system. Since the braking system is relatively independent and has no strongly related systems, we can move to the functional dimension and look for defects in the braking system.

[0056] In one possible scenario, the most frequently reported problem by pilots that has the greatest impact on current braking is brake maneuverability, namely, difficulty in precisely controlling the brakes and accurately controlling the taxiing speed, which can easily cause a jerking sensation during braking and make passengers feel uncomfortable.

[0057] By studying the functional characteristics of airborne equipment or products involved in brake maneuverability issues, and combining the pilot's usage time and scenarios, this study analyzes the key equipment corresponding to the brake system's maneuverability function from four dimensions: system, function, equipment, and indicators. It also analyzes the key indicators of equipment usability and correlates them with brake usage defects.

[0058] A thorough analysis of brake design and usage characteristics revealed that factors such as the relationship between brake pedal travel and brake pressure, brake pedal force, pedal size, and spatial position all affect the difficulty of brake operation, with the brake pedal being the key component. Through root cause analysis, defects related to brake pedal usage were identified, and a brake pedal usability evaluation index was established.

[0059] Step 2: Verify the task scenario design

[0060] By integrating the equipment characteristics of the braking system, analyzing the combat mission and usage requirements, and based on the combination of personnel and equipment, we start from three levels: pilot operation, aircraft equipment, and mission environment. We identify pilot selection (default fixed crew for this type of aircraft), braking method (fast / gentle), braking mode (normal / backup / emergency), taxiing speed (30kN / 60kN / 100kN), and airport runway environment (dry / wet runway) as key influencing factors. Based on the permutation and combination of key influencing factors, we can design and construct 36 different dimensions of verification scenarios.

[0061] Step 3: Verification Method Selection

[0062] Based on the conformity verification method, and considering the characteristics of the flight test phase, the progressiveness and comprehensiveness of defect verification are analyzed to form a four-dimensional verification method, which specifically includes on-board parameter measurement, simulator test verification, ground operation verification, and in-flight test verification.

[0063] To address the brake maneuverability deficiencies of this aircraft type, and in conjunction with pedal availability evaluation indicators, the following measures were determined: onboard indicator measurement, ground control subjective evaluation (evaluation elements include pedal size rationality, pedal space rationality, pedal force appropriateness, seat and pedal matching), brake parameter measurement (including brake pressure, brake pedal travel, wheel speed, and aircraft ground speed), and pilot subjective evaluation (combining routine flight verification and brake-specific taxiing verification).

[0064] Step 4: Verification and Result Analysis

[0065] Before implementation, mission coordination is required, integrating ground verification and in-flight verification. Taking into account personnel samples such as flight crew and test engineers, a comprehensive evaluation system should be formed from aspects such as the rationality of pedal length / width dimensions, initial angle / travel angle / surround space, initial / full travel pedal force, brake pressure curve rationality, and seat compatibility. Ground and in-flight test evaluations should be carried out in conjunction with specific test flight missions.

[0066] The preliminary evaluation results need to be verified on-board, compared with similar and historical models, and the pedal length and initial pedal angle should be compared to verify the validity of the results.

[0067] Step 5: Defect Consequence Analysis and Evaluation

[0068] Using the concept of combining human and equipment, a set of consequence evaluation factors is established from aspects such as situational awareness, workload, functional realization, performance level, and ergonomics. The severity evaluation level of the defect consequences is given, corresponding to Level 5, Level 4, Level 3, Level 2, and Level 1, which are respectively not serious, not very serious, average, relatively serious, and very serious. Adaptive improvements need to be made based on the feedback from pilots and the condition of the aircraft equipment during the flight test phase.

[0069] The occurrence of defects is generally closely related to pilot usage. The more frequent and varied the usage, the higher the likelihood of defects occurring. Considering the severity of defect consequences (very serious, relatively serious, moderate, not very serious, not serious, corresponding to indices 1-5) and the probability of consequences (frequent, very likely, occasional, rare, very rare, corresponding to indices 1-5), a consequence index matrix is ​​established based on extension theory, corresponding to five levels of consequence evaluation: Level I, Level II, Level III, Level IV, and Level V, with corresponding indices 1-6, 7-10, 11-15, 16-19, and 20-25. Specific explanations are provided for different levels from multiple dimensions affecting flight safety, aircraft systems, and pilot operations, along with suggested handling methods for whether to generate a defect report or problem handling form, as detailed in Table 1 below.

[0070] Table 1

[0071]

[0072]

[0073] Secondly, this invention proposes a brake defect analysis and consequence evaluation device based on flight reviews. The brake defect analysis device includes a problem and defect analysis unit, used to determine brake-related problems based on flight review information, classify all brake-related problems according to function, and for brake-related problems involving functional types with normal performance indicators, conduct problem cause and defect analysis from four dimensions: system, function, equipment, and indicator, to obtain equipment and indicators for resolving brake-related problems.

[0074] The verification scenario design unit is used to design a verification scenario for braking based on the characteristics of the equipment and aircraft and the aircraft's combat mission, and to obtain the verification scenario.

[0075] The verification method selection unit is used to consider the progressiveness and comprehensiveness of defect verification in the verification scenario, forming a four-dimensional verification method.

[0076] The verification result comparison unit adopts a four-dimensional verification method to carry out verification, obtain verification results, and compare and analyze the verification results with similar aircraft models to form aircraft defect verification conclusions and design improvement suggestions.

[0077] The brake defect consequence assessment device includes:

[0078] The factor set acquisition unit is used to establish a factor set for evaluating the consequences of defects based on the equipment and indicators in the aircraft defect verification conclusions.

[0079] The consequences analysis unit is used to determine the severity and likelihood of the consequences of defects for each element in the defect consequences evaluation factor set.

[0080] The consequence level acquisition unit is used to determine the consequence level of each element based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set; the consequence level is used to instruct the pilot on flight operations.

Claims

1. A method for analyzing brake defects based on flight reviews, characterized in that, Includes the following steps: S101. Based on the flight review information, identify braking-related problems, classify all braking-related problems according to function, and for braking-related problems involving functional types with normal performance indicators, conduct a four-dimensional analysis of the causes and defects of the problems from the perspectives of system, function, equipment, and indicators, and obtain the equipment and indicators to solve the braking-related problems. S102. Based on the characteristics of the equipment and aircraft and the combat mission of the aircraft, a verification scenario for braking is designed based on the combination of personnel and equipment to obtain the verification scenario. S103. In the verification scenario, considering the progressiveness and comprehensiveness of defect verification, a four-dimensional verification method is formed. S104. The four-dimensional verification method is adopted to implement the verification, obtain the verification results, and compare and analyze the verification results with similar aircraft models to form the aircraft defect verification conclusion and design improvement suggestions. The four-dimensional verification method includes: on-board parameter measurement, simulator test verification, ground taxiing operation verification, and in-flight test verification, integrating qualitative and quantitative indicators, and carrying out special and combined test verification. The elements of mission scenario design include: in the horizontal dimension, the equipment characteristics of the braking system, the aircraft's combat mission and mission usage requirements; in the vertical dimension, the three levels involved in the integration of personnel and equipment: pilot operation, aircraft equipment, and mission environment.

2. The method according to claim 1, characterized in that, The types of brake-related problems include: brake handling, brake failure alarm, brake temperature, and brake noise.

3. A method for evaluating the consequences of braking defects based on flight reviews, characterized in that, The method includes: S105. Based on the equipment and indicators in the aircraft defect verification conclusion, establish a set of defect consequence evaluation factors; The aircraft defect verification conclusion is obtained using the method described in any one of claims 1-2; S106. Determine the severity and likelihood of defect consequences for each element in the defect consequence evaluation factor set. S107. Based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set, determine the consequence level of each element. The consequence level is used to instruct the pilot on flight operations.

4. The method according to claim 3, characterized in that, The determination of the probability of defect consequences for each element in the defect consequence evaluation factor set includes: Based on all associated historical flight review information for each element in the defect consequence evaluation factor set, the likelihood of defect consequences is determined.

5. The method according to claim 3, characterized in that, The set of factors for evaluating the consequences of defects includes: the impact of equipment and indicators on the pilot's situational awareness, workload, functional implementation, performance level, and ergonomics.

6. The method according to claim 3, characterized in that, For each of the identified defect consequence levels, specific explanations and handling suggestions are provided from multiple dimensions, including impact on flight safety, aircraft systems, and pilot operations.

7. A brake defect analysis device based on flight review, characterized in that, include: The problem and defect analysis unit is used to identify braking-related problems based on flight review information. All braking-related problems are classified according to function. For braking-related problems involving functional types with normal performance indicators, the unit conducts problem cause and defect analysis from four dimensions: system, function, equipment, and indicator, and obtains the equipment and indicators to solve the braking-related problems. The verification scenario design unit is used to design a verification scenario for braking based on the characteristics of the equipment and aircraft and the aircraft's combat mission, and to obtain the verification scenario. The verification method selection unit is used to consider the progressiveness and comprehensiveness of defect verification in the verification scenario, forming a four-dimensional verification method. The verification result comparison unit adopts a four-dimensional verification method to carry out verification, obtain verification results, and compare and analyze the verification results with similar aircraft models to form aircraft defect verification conclusions and design improvement suggestions. The four-dimensional verification method includes: on-board parameter measurement, simulator test verification, ground taxiing operation verification, and in-flight test verification, integrating qualitative and quantitative indicators, and carrying out special and combined test verification. The elements of mission scenario design include: in the horizontal dimension, the equipment characteristics of the braking system, the aircraft's combat mission and mission usage requirements; in the vertical dimension, the three levels involved in the integration of personnel and equipment: pilot operation, aircraft equipment, and mission environment.

8. A brake defect consequence evaluation device based on flight review, characterized in that, include: The factor set acquisition unit is used to establish a factor set for evaluating the consequences of defects based on the equipment and indicators in the aircraft defect verification conclusions. The aircraft defect verification conclusion is obtained using the method described in any one of claims 1-2; The consequences analysis unit is used to determine the severity and likelihood of the consequences of defects for each element in the defect consequences evaluation factor set. The consequence level acquisition unit is used to determine the consequence level of each element based on the severity and probability of the defect consequences of each element in the defect consequence evaluation factor set; the consequence level is used to instruct the pilot on flight operations.

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