A system partition code encoding method for aircraft maintenance

Abstract

The present invention belongs to the field of aviation technology design, and discloses a system division code encoding method for aircraft maintenance. Step 1: Obtain the overall, system and subsystem design schemes of the aircraft, decompose the subsystem into units; and sort out the affiliation between the aircraft system, subsystem and unit; Step 2: System code the aircraft system, and the system code is the first part of the aircraft system division code, represented by the first and second digits; Step 3: Based on the aircraft system code, encode the aircraft subsystem, and the subsystem code is the second part of the aircraft system division code, represented by the third digit; Step 4: Based on the aircraft subsystem code, encode the unit of different models of the aircraft as the third part of the aircraft system division code, represented by the fifth and sixth digits; Step 5: Based on the aircraft unit code, encode the serial number of different individuals of the same model unit whose installed quantity is greater than 1.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology design and relates to a system partition code encoding method for aircraft maintenance. Background Art

[0002] The new generation of aircraft adopts more condition-based maintenance technology, and precision maintenance has become the leading factor in aircraft maintenance work. Precision maintenance requires the establishment of the initial configuration data of the aircraft. The initial configuration data should reflect the product composition of the aircraft, and should include product lists and product installation location information; in addition, it should also show the hierarchical relationship between the aircraft's systems, subsystems, sub-subsystems, and even detachable parts, as well as the basic information, affiliation, installation location, working environment, and other information of each installed unit, so as to achieve appropriate maintenance work for the specific situation of each unit. Therefore, the basis for achieving precision maintenance is to uniquely identify each unit of the installation. The SNS code (system partition code) can identify the aircraft, system, component, and the affiliation between them. The SNS number specified in the standard is generally composed of 6 digits and 3 parts, which cannot identify each LRU on the aircraft, and does not utilize precise maintenance and technical status control based on a single aircraft and a single unit. Therefore, in order to meet the data requirements of state-based management of information security, it is necessary to achieve unique identification of each LRU installed. Summary of the invention

[0003] The present invention expands the SNS coding method specified in GJB6600 and GJB4855 from 6 bits to 8 bits, forms an SNS coding method consisting of four parts, and formulates an 8-bit SNS coding process and coding rules. By adding the fourth part, the serial number of the number of single machines, the coding of the units with different installed quantities is completed, thereby ensuring that each installed unit has a unique identification system division code.

[0004] A system partition code encoding method for aircraft maintenance, comprising the following steps:

[0005] Step 1: Obtain the overall design plan, system design plan and subsystem design plan of the aircraft, decompose the subsystem into units, and sort out the affiliation between the aircraft system, subsystem and unit;

[0006] Step 2: System code the aircraft system. The system code is the first part of the aircraft system classification code and is represented by the first and second digits;

[0007] Step 3: Based on the aircraft system code, the aircraft subsystem is subsystem-coded. The subsystem code is the second part of the aircraft system classification code and is represented by the third digit;

[0008] Step 4: Based on the aircraft subsystem code, unit codes are performed on the units of different aircraft models, which are represented by the fifth and sixth digits as the third part of the aircraft system classification code;

[0009] Step 5: Based on the aircraft unit code, serial number codes are assigned to different units of the same model with an installed quantity greater than 1.

[0010] Furthermore, in step 2, the aircraft system is a combination of related equipment configured to perform a specific function, and each system includes basic components and related mechanical control devices, electrical and hydraulic control devices;

[0011] When a power source provides power to a single component or a single system, the power source is encoded in the system powered by the power source;

[0012] When a power source provides power to multiple systems, the power source is coded separately as a system.

[0013] Furthermore, in step three, if a subsystem needs to be further divided into sub-subsystems, the sub-subsystems are coded, and the sub-subsystem code serves as the second part of the aircraft system division code and is represented by the fourth digit.

[0014] Furthermore, in step three, if a subsystem does not need to be divided into sub-subsystems, the fourth digit is 0.

[0015] Furthermore, when the unit body is indivisible and the quantity is 1, the sixth bit of the unit body code cannot be 0, and the seventh and eighth bits are represented by 00.

[0016] Furthermore, when the unit body is composed of 2 to 9 components, the sixth bit of the unit body code is 0, the fifth bit of the unit body component code is the same as the fifth bit of the unit body code, and the sixth bit of the unit body component code is represented by 1 to 9.

[0017] Furthermore, when a unit body is shared by multiple subsystems or sub-subsystems, the third and fourth bits of the unit body code are 00.

[0018] Furthermore, when the unit bodies are pipelines or torsion bars of the same type but different specifications, serial number coding is performed according to the unit bodies of the same model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of code division for aircraft systems;

[0020] Figure 2 A flow chart of a coding method for system partitioning for aircraft maintenance;

[0021] Figure 3Schematic diagram of the relationship between aircraft systems, subsystems and units. DETAILED DESCRIPTION

[0022] The present invention will be further described below by specific embodiments:

[0023] The present invention expands the SNS coding method specified in GJB6600 and GJB4855 from 6 bits to 8 bits, forming a four-part SNS coding method, and formulating an 8-bit SNS coding process and coding rules. By adding the fourth part, the serial number of the number of units, the coding of the units with non-unique installed numbers is completed, thereby ensuring that each installed unit has a unique identification system division code, such as Figure 1 shown.

[0024] A product coding method for precision maintenance, such as Figure 2 As shown, the product coding method includes:

[0025] Step 1: Collect the overall plan, system plan and subsystem plan of the aircraft. According to the subordinate relationship of each level of the aircraft, divide the aircraft from system to subsystem, sub-subsystem, and finally decompose it into each unit, such as Figure 3 shown.

[0026] Step 2: Based on the overall plan of the aircraft, encode the aircraft system according to the division of the aircraft in the overall plan. The system code is the first part of the SNS code and is represented by the first and second digits. The system code is expressed in the form of ××-00-00-00. The system code is based on the system code of GJB4855. If the system is not specified in GJB4855, the spare number custom representation can be activated. (See Table 1 for system code examples)

[0027] a) A system is a combination of interrelated devices configured to perform a specific function. Each system includes its basic components and all mechanical control devices, electrical and hydraulic control devices associated with the system.

[0028] b) When a power source (such as electrical, pneumatic or hydraulic) provides power to a single component or a system with a single function, the power source is coded in the component or system being powered.

[0029] c) When one power source provides power for two or more systems, the main power source is independently coded (see Table 1 for power system and hydraulic source system), and the sub-power sources are coded in the relevant systems / chapter (e.g., if the power source, air source, hydraulic source, etc. provide sub-power sources for the landing gear and doors, the sub-power sources are coded in the landing gear and door chapters).

[0030] Table 1 System coding example

[0031] System Name coding Remark Flight Control System 27-00-00-00 Fuel subsystem 28-00-00-00 Power System 24-00-00-00 Hydraulic source system 29-00-00-00 Liquid Cooling System 90-00-00-00 Activate backup number

[0032] Step 3: Based on the aircraft system plan, divide the aircraft's subsystems according to the aircraft system plan and encode the subsystems. The subsystem is the second part of the SNS code and is represented by the third digit. The subsystem is expressed as ××-×0-00-00. The subsystem coding refers to the subsystem coding of GJB4855. If the subsystem is not in GJB4855, you can start the custom representation of the spare number. Some subsystems are more complex and need to be further divided into component-subsystems. The sub-subsystem is the second part of the SNS code and is represented by the fourth digit. The sub-subsystem is expressed as ××-××-00-00. According to the complexity of the subsystem, it is numbered in sequence from 1 to 9. (See Table 2 for examples of subsystem and sub-subsystem coding) Table 2 Subsystem and sub-subsystem coding examples

[0033] Subsystem / Sub-subsystem name coding Remark Aileron control subsystem 27-10-00-00 Rudder control subsystem 27-20-00-00 Storage subsystem 28-10-00-00 Fuel tank sub-system 28-11-00-00 Fuel tank ventilation system 28-12-00-00 Distribution subsystem 28-20-00-00

[0034] Step 4: Based on the aircraft subsystem scheme, encode the aircraft unit according to the coding rules. The unit type is the third part of the SNS code and consists of the 5th and 6th digits. The unit type is expressed as ××-××-××-00. (See Table 3 for examples of unit assembly and unit coding)

[0035] a) When there is no need to further divide the unit body, the unit body is the final division in SNS, and the specific device can be identified. At this time, the sixth bit cannot be 0, and the 7th and 8th bits of the fourth part are directly represented by 00, and the form is ××-××-01-00 to ××-××-99-00, and 10, 20, 30...90 are automatically skipped.

[0036] b) If the unit body is complex and needs to be further divided, the unit body components can be encoded using 10, 20, 30...90, and the divisions of the unit body can be represented by 11, 12, 13...19, etc.

[0037] c) When the number of installed units on the aircraft is greater than or equal to 2, the unit is not the final division in SNS and needs to be further divided using the fourth part of the code.

[0038] d) When some components and equipment in a system are common to many other subsystems or sub-subsystems in the system, these components and equipment should be discussed under the title of the system and divided in Part II or Part III. For example, the independent steering gear, load mechanism, tie rod, rocker arm, transmission shaft and universal joint head, bracket and tie rod in the control system of Chapter 27 are common to some subsystems or sub-subsystems in this chapter, so these components and equipment should be coded under the title of 27-00-00-00.

[0039] Table 3 Unit body components, unit body coding examples

[0040] Unit components, unit name coding Remark Flight control computer 27-00-01-00 Primary flight control panel 27-00-02-00 Aileron control module 27-10-01-00 Aileron actuator 27-10-02-00 Heading control device 27-20-10-00 Pedal components 27-20-11-00 Load mechanism 27-20-12-00 Outboard rudder actuator 27-20-21-00 Inboard rudder actuator 27-20-22-00 Gravity fuel filler assembly 28-11-01-00 Check valve 28-11-02-00 Sedimentation valve 28-11-03-00

[0041] Step 5: Based on the installed quantity of the aircraft unit, encode the aircraft's non-unique installed units according to the encoding rules. (See Table 4 for examples of encoding non-unique installed units)

[0042] a) The serial number of a single machine is a unique identification code for units with non-unique installed quantities, and is expressed in the form of ××-××-××-01 to ××-××-××-99. If 10, 20, 30…90 are encountered in the middle, there is no need to skip numbers and the numbers can be continuous.

[0043] b) The single-machine quantity serial number is a unique identification code for pipelines and torsion bars of the same type but different specifications, and is expressed in the form of ××-××-××-01 to ××-××-××-99. If 10, 20, 30…90 are encountered in the middle, there is no need to skip numbers and the numbers can be continued.

[0044] c) Standard parts and joint units used in large quantities in structures or systems do not need to be serially numbered.

[0045] Table 4 Example of installation unit coding that is not unique

[0046] The installed unit name is not unique coding Remark Flight control computer 27-00-01-01 Flight control computer 27-00-01-02 Flight control computer 27-00-01-03 Aileron control module 27-10-01-01 Aileron control module 27-10-01-02 Check valve 28-11-02-01 Check valve 28-11-02-02 Check valve 28-11-02-03 Check valve 28-11-02-04 Check valve 28-11-02-05 Check valve 28-11-02-06 Check valve 28-11-02-07 Check valve 28-11-02-08 Check valve 28-11-02-09 Check valve 28-11-02-10 Check valve 28-11-02-11

[0047] Table 5 Aircraft coding examples

[0048]

[0049]

Claims

1. A system partition code encoding method for aircraft maintenance, characterized by: The method comprises the following steps: Step 1: Obtain the overall aircraft design plan, aircraft system design plan and aircraft subsystem design plan, decompose the aircraft subsystem into units; and sort out the affiliation between the aircraft system, aircraft subsystem and unit; Step 2: System code the aircraft system. The system code is the first part of the aircraft system classification code, represented by the first and second digits, in the form of ××-00-00-00; Step 3: Based on the aircraft system code, encode the aircraft subsystem. The subsystem code is the second part of the aircraft system classification code, represented by the third digit, and the subsystem is expressed in the form of ××-×0-00-00; if a subsystem needs to be further divided into sub-subsystems, encode the sub-subsystem. The sub-subsystem code is the second part of the aircraft system classification code, represented by the fourth digit, and the expression is ××-××-00-00; Step 4: Based on the aircraft subsystem code, unit codes are performed for units of different models of the aircraft, which are represented by the fifth and sixth digits as the third part of the aircraft system division code; when the unit cannot be divided and the quantity is 1, the sixth digit of the unit code cannot be 0, and the seventh and eighth digits are represented by 00, and the expression is ××-××-01-00 to ××-××-99-00, among which 10, 20, 30…90 are automatically skipped; if the unit needs to be further divided, the unit components are encoded with 10, 20, 30…90, and the division of the unit is represented by 11, 12, 13…19; Step 5: Based on the aircraft unit code, different individuals of the same model unit with an installed quantity greater than or equal to 2 are serially numbered, represented by the seventh and eighth digits, in the form of ××-××-××-01 to ××-××-××-99. If 10, 20, 30…90 are encountered in the middle, there is no need to skip numbers and the numbers are continuous.

2. The system partition code encoding method for aircraft maintenance according to claim 1 is characterized in that: In step 2, the aircraft system is a combination of related equipment configured to perform a specific function, and each aircraft system includes basic components and related mechanical control devices, electrical and hydraulic control devices; When a power source provides power to a single component or a single system, the power source is encoded in the system powered by the power source; When a power source provides power to multiple systems, the power source is coded separately as a system.

3. The system partition code encoding method for aircraft maintenance according to claim 2 is characterized in that: When a unit body is shared by multiple subsystems or sub-subsystems, the third and fourth bits of the unit body code are 00.

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