Technical standard establishment method, establishment system and establishment equipment for airworthiness conformity and computer readable storage medium

Abstract

The invention relates to a process standard establishment method, system and device for airworthiness conformity and a computer readable storage medium. The airworthiness conformity-oriented process standard establishment method comprises the following steps: S1, determining an expected use range of a certain process; s2, determining key performance indexes of the process; s3, determining a key process route; s4, determining key control elements and key process parameters; s5, determining the control range of the key process parameters; s6, judging the stability of the process; s7, issuing a process standard trial draft; s8, in an expected use range, adopting a process standard trial manuscript to carry out trial production on typical products, analyzing production process capability, and carrying out a verification test; and S9, submitting a process standard verification analysis report corresponding to the process. According to the airworthiness conformity-oriented process standard establishment method, system and equipment and the computer readable storage medium provided by the invention, the process standard establishment period can be effectively shortened, and the test cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of airworthiness compliance verification, and in particular to a method, system, device and computer-readable storage medium for establishing process standards for airworthiness compliance. Background Art

[0002] In order to ensure the safety of civil aircraft, safeguard the public interest and promote the development of aviation, the Airworthiness Administration has promulgated airworthiness regulations for aircraft engines, stipulating the minimum safety level of civil aircraft engines. The manufacturing process is an important process to ensure that the physical product always meets the design intent. The manufacturing process must be strictly controlled through technical standards to ensure that a sound structure is always produced. Among them, the airworthiness clause CCAR25 "China Civil Aviation Transport Aircraft Airworthiness Standards" 605 manufacturing methods point out: a) The manufacturing method used must be able to produce a sound structure. If a certain manufacturing method (such as bonding, spot welding or heat treatment) requires strict control to achieve this goal, the process must be carried out in accordance with the approved process specifications. b) Each new manufacturing method must be confirmed by a test outline. Airworthiness clause CCAR33 "Airworthiness Regulations for Aircraft Engines" 15 points out: The applicability and durability of the materials used in the engine must meet the following requirements: a) Based on experience or testing; b) Comply with approved standards (such as industrial or military standards) to ensure that these materials have the strength and other properties used in the design data.

[0003] In order to verify that the technical standards can meet the airworthiness requirements, it is necessary to demonstrate the applicability of the technical standards (process standards) and the stability of the manufacturing process, and complete the airworthiness compliance verification by adopting the applicable verification methods. Due to the late start of civil aircraft development in my country, the safety design of civil aircraft is backward, and the research on airworthiness compliance verification has just started. The standard establishment process is not standardized, and the airworthiness compliance verification methods and verification data are not perfect. As a result, a large number of additional verification tests need to be carried out during the standard airworthiness compliance verification process, which increases the project development cycle and cost. Summary of the invention

[0004] In view of the above problems in the prior art, the present invention proposes a method, system, device and computer-readable storage medium for establishing process standards for airworthiness compliance, which can effectively save the process standard establishment cycle and reduce testing costs.

[0005] Specifically, the present invention proposes a method for establishing a process standard for airworthiness compliance, wherein the process standard is applicable to an aircraft engine, and the method for establishing the process standard comprises the following steps:

[0006] S1, determine the expected scope of use of a process;

[0007] S2, determining key performance indicators of the process based on the expected scope of use;

[0008] S3, determining a key process route based on the key performance indicators;

[0009] S4, determining key control factors and key process parameters based on the key process route;

[0010] S5, determining the control range of the key process parameters;

[0011] S6, determining the stability of the process, performing a wafer-level test, and running the process based on N batches to verify the impact of random factors on the key performance indicators. If the stability meets the requirements, proceed to step S7; if the stability does not meet the requirements, return to step S2 to redetermine the key performance indicators.

[0012] S7, collating the execution results of steps S1-S6, generating and publishing a trial draft of the process standard corresponding to the process;

[0013] S8, perform product-level testing within the expected use range, use the process standard trial version to trial-produce typical products, analyze the production process capability, and perform verification tests on the typical products. If the test verification requirements are met, proceed to step S9; if the test verification requirements are not met, return to step S2 and redefine the key performance indicators;

[0014] S9, collating the execution results of steps S1-S6 and S8, generating and submitting a process standard verification analysis report corresponding to the process for airworthiness compliance review.

[0015] According to an embodiment of the present invention, in step S1, the expected usage scope includes typical usage scenarios. If there are multiple typical usage scenarios, the typical usage scenarios are classified.

[0016] According to one embodiment of the present invention, in step S2, the key performance indicator is used to characterize the product quality level expected to be achieved under the process control.

[0017] According to one embodiment of the present invention, in step S4, the correlation between the key control factors and key process parameters is studied through experimental design, and the correlation between the key process parameters and key performance indicators is established.

[0018] According to one embodiment of the present invention, in step S5, the acceptable design space of the key process parameters is studied based on experimental design, a mathematical relationship between the key process parameters and key performance indicators is established through multiple batch experiments, a fitting formula or response surface is established, and the control range of the key process parameters is determined according to the fitting formula or the corresponding surface.

[0019] According to an embodiment of the present invention, N is greater than or equal to 3.

[0020] According to an embodiment of the present invention, in step S8, the process capability of the trial production is analyzed, taking into account the scale effect of the typical product and the size structure effect of the product.

[0021] The present invention also provides a process standard establishment system for airworthiness compliance, which is applicable to the above-mentioned process standard establishment method, and the process standard establishment system includes:

[0022] A scope of use establishing unit for determining the expected scope of use of the process;

[0023] A key performance indicator establishing unit, used to determine the key performance indicators of the process based on the expected scope of use;

[0024] A key process route establishing unit, used for determining a key process route based on the key performance indicators;

[0025] A key parameter establishment unit, used to determine key control elements and key process parameters based on the key process route;

[0026] A parameter control range establishing unit, used to determine the control range of the key process parameters;

[0027] A judgment unit, used to judge the stability of the process, and to run the process based on N batches to verify the influence of random factors on the key performance indicators;

[0028] A publishing unit, used to organize the expected use scope, key performance indicators, key process routes, key control elements and key process parameters, the control scope, and the operation result of the judgment unit, and generate and publish a trial version of the process standard corresponding to the process;

[0029] A verification unit, used for conducting verification tests on the typical products;

[0030] The submission unit is used to organize the expected scope of use, key performance indicators, key process routes, key control elements and key process parameters, the control range, and the verification results of the verification unit, and generate and submit the process standard verification analysis report corresponding to the process for airworthiness compliance review.

[0031] The present invention also provides a device for establishing process standards for airworthiness compliance, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of any of the aforementioned methods for establishing process standards for airworthiness compliance are implemented.

[0032] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any of the aforementioned methods for establishing process standards for airworthiness compliance are implemented.

[0033] The present invention provides a method, system, device and computer-readable storage medium for establishing process standards for airworthiness compliance, which integrates airworthiness compliance verification requirements into the process of establishing process standards, and can effectively save the process standard establishment cycle and reduce testing costs.

[0034] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are included to provide further explanation of the present invention, and are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principle of the present invention.

[0036] In the attached figure:

[0037] Figure 1 A flowchart of a method for establishing process standards for airworthiness compliance according to an embodiment of the present invention is shown.

[0038] Figure 2 A flowchart of a system for establishing process standards for airworthiness compliance according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0045] Airworthiness compliance verification is a mandatory verification work carried out to ensure the flight safety of aircraft. Due to the characteristics of civil aviation engines, such as the large variety of special processes, high process complexity, high process cost, and long production cycle, the airworthiness clauses require the establishment of applicable technical standards to strictly control the production process. Therefore, manufacturers need to demonstrate the applicability of the standards to the airworthiness representative. Traditional process standard establishment and airworthiness compliance verification are often independent of each other: the standard establishment process is gradually improved through random, multi-round iterative tests, and airworthiness compliance verification tests are carried out separately after the standard establishment is completed. The process standard establishment and verification cycle under this mode is long, and due to the large number of iterations, the total test volume is large, and there is a certain cost waste. Based on this, the present invention aims to propose a standard establishment method for airworthiness compliance verification, which integrates the airworthiness compliance verification requirements into the standard establishment process, with the aim of shortening the establishment cycle and reducing the test cost.

[0046] Figure 1 The flowchart of a method for establishing a process standard for airworthiness compliance according to an embodiment of the present invention is shown. As shown in the figure, the present invention provides a method for establishing a process standard for airworthiness compliance, and the process standard is applicable to aircraft engines. The process standard establishment method comprises the steps of:

[0047] S1, determine the expected scope of use of a process. According to the opinions of the party proposing the process standard requirements of the process, determine the typical use scenario of the process.

[0048] S2, based on the expected scope of use, determine the key performance indicators that the process is expected to achieve. According to the opinions of the party proposing the process standard requirements of the process, determine the corresponding key performance indicators.

[0049] S3, based on key performance indicators, determine the key process route. Combined with existing public technical theories and knowledge achievements, determine the key process route of the process in a laboratory environment.

[0050] S4, based on the key process route, determine the key control factors and key process parameters;

[0051] S5, determine the control range of key process parameters;

[0052] S6, determine the stability of the process, perform a test piece level test, and run the process based on N batches to verify the impact of random factors on key performance indicators. If the stability meets the requirements, proceed to step S7. If the stability does not meet the requirements, return to step S2 and redetermine the key performance indicators.

[0053] S7, collating the execution results of steps S1-S6, generating and publishing a trial draft of the process standard corresponding to the process;

[0054] S8, conduct product-level testing within the expected use range, use the process standard trial version to trial-produce typical products, analyze the production process capability, and conduct verification tests on typical products. If the test verification requirements are met, proceed to step S9. If the test verification requirements are not met, return to step S2 and redefine the key performance indicators;

[0055] S9, collating the execution results of steps S1-S6 and S8, generating and submitting the process standard verification analysis report corresponding to the process for airworthiness compliance review. If the airworthiness compliance review is passed, the process standard can be officially released.

[0056] Preferably, in step S1, the expected use scope includes typical use scenarios. If there are multiple typical use scenarios, the typical use scenarios are classified. The classification of typical use scenarios is consistent with the subsequent standard airworthiness compliance verification analysis report.

[0057] Preferably, in step S2, the key performance indicators are used to characterize the product quality level expected to be achieved under process control. The quality level is consistent with the subsequent standard airworthiness compliance verification analysis report.

[0058] Preferably, in step S4, the correlation between key control factors and key process parameters is studied through DOE (DESIGN OF EXPERIMENT), and the correlation between key process parameters and key performance indicators is established. Key process parameters are important verification contents of process standard airworthiness compliance verification. The experimental design data results are used to support the basis for key parameter screening in airworthiness compliance verification. The screened key process parameters are consistent with the parameters of the subsequent standard airworthiness compliance verification report.

[0059] Preferably, in step S5, the acceptable design space of key process parameters is studied based on experimental design, the mathematical relationship between key process parameters and key performance indicators is established through multiple batch tests, a fitting formula or response surface is established, and the control range of key process parameters is determined according to the fitting formula or the corresponding surface. Rigorous and statistical parameter design can effectively improve the effectiveness and stability of standard control, thereby reducing the batch requirements for airworthiness compliance verification. Therefore, the experimental design in steps S4 and S5 should establish a comprehensive and statistical test matrix to obtain the effective control range of key process parameters.

[0060] Preferably, in step S6, N is greater than or equal to 3. That is, in a laboratory environment, the process is run through at least 3 batches to fully verify the impact of random factors on key performance indicators, so as to demonstrate the batch stability and intra-batch stability of the process. The number of batches should be determined according to the actual application of the standard, but at least 3 batches should be met as stability evidence for airworthiness requirements.

[0061] Preferably, in step S8, the process capability of the trial production is analyzed, the scale effect of typical products and the size and structure effect of the products are comprehensively considered, and the corresponding data is obtained to indicate the applicability of the airworthiness requirements. For the verification test of typical products, such as dissection and assessment tests, the obtained verification test data is used to indicate the applicability of typical products.

[0062] The following describes in detail a method for establishing a process standard for airworthiness compliance provided by the present invention through an embodiment. In this embodiment, the process is: argon arc welding of aircraft engine turbine blades, and the corresponding process standard establishment method includes the steps of:

[0063] S1, determine the expected use scope of argon arc welding of aircraft engine turbine blades. According to the opinions of the party proposing the process standard requirements of the process, it is determined that there are two typical use scenarios of the process, one is non-single crystal turbine blade argon arc welding, and the other is single crystal turbine blade argon arc welding.

[0064] For the first typical usage scenario, the argon arc welding of non-single crystal turbine blades executes step S2.

[0065] S2, based on the argon arc welding of non-single crystal turbine blades, determine the key performance indicators that the process is expected to achieve. According to the opinions of the party proposing the process standard requirements of the process, the corresponding key performance indicators are determined as: 100% penetration, pore diameter not exceeding 1mm, and no cracks.

[0066] S3, based on the above key performance indicators, determine the key process route. Combined with the existing public technical theories and knowledge achievements, the key process route of this process is determined in a laboratory environment: 1. Cleaning; 2. Welding; 3. Visual inspection; 4. Fluorescent inspection.

[0067] S4, based on the above key process route, determine the key control factors and key process parameters. The results are as follows: 1. In the cleaning step, the key process parameter is the time interval from cleaning to welding; 2. In the welding step, the key process parameter is the welding current; 3. In the visual inspection step, the key process parameter is the inspection reliability; 4. In the fluorescent inspection step, the key process parameter is the sensitivity.

[0068] S5, determine the control range of key process parameters, refer to Table 1 below;

[0069] Table 1

[0070] Key process parameters Control scope 1 Cleaning to welding time interval No obvious oxidation or pollution occurs within 8 hours 2 Welding current It can fully penetrate the soldering at 25A and will not overheat at 50A 3 Check reliability 5-10 times magnifying glass can detect cracks and pores of 1mm and above 4 Sensitivity Level 3 sensitivity can detect cracks and pores of 1mm and above

[0071] S6, judging the stability of the process, and performing a test piece level test. In this embodiment, a non-single crystal test plate is used to carry out the stability test, three batches, each batch has 10 samples.

[0072] The key process parameters of the first group of tests were: 8h time interval from cleaning to welding, 25A welding current, 5x magnifying glass, and 3-level sensitivity;

[0073] The key process parameters of the second group of tests were: 8h time interval from cleaning to welding, 50A welding current, 5x magnifying glass, and 3-level sensitivity;

[0074] The penetration rate, maximum pore diameter, and crack rate of the above two groups of 60 samples are calculated. If cracks occur and the penetration is not 100%, the stability fails, and it is necessary to return to step S2 to redefine the key performance indicators; if the result is that there is no crack, 100% penetration, and the maximum pore diameter CPK is less than 1.0, the stability fails, and it is necessary to return to step S2 to redefine the key performance indicators; if there is no crack, 100% penetration, and the maximum pore diameter CPK is greater than or equal to 1.0, the stability passes, and enters the next step;

[0075] So far, for the first typical usage scenario, argon arc welding of non-single crystal turbine blades, the test piece level test meets the test verification requirements. Next, for the second typical usage scenario, argon arc welding of single crystal turbine blades, step S2 is performed.

[0076] S2, based on the argon arc welding of single crystal turbine blades, determine the key performance indicators that the process is expected to achieve. According to the opinions of the party proposing the process standard requirements of the process, the corresponding key performance indicators are determined as: 100% penetration, pore diameter not exceeding 0.5mm, no cracks, and no recrystallization.

[0077] S3, based on the above key performance indicators, determine the key process route. Combined with the existing public technical theories and knowledge achievements, the key process route of this process is determined in a laboratory environment: 1. Cleaning; 2. Welding; 3. Visual inspection; 4. Fluorescence inspection; 5. Recrystallization inspection.

[0078] S4, based on the above key process route, determine the key control factors and key process parameters. The results are as follows: 1. In the cleaning step, the key process parameter is the time interval from cleaning to welding; 2. In the welding step, the key process parameter is the welding current; 3. In the visual inspection step, the key process parameter is the inspection reliability; 4. In the fluorescent inspection step, the key process parameter is the sensitivity; 5. In the recrystallization inspection step, the key process parameter is the recrystallization inspection method.

[0079] S5, determine the control range of key process parameters, refer to Table 2 below;

[0080] Table 2

[0081] Key process parameters Control scope 1 Cleaning to welding time interval No obvious oxidation or pollution occurs within 8 hours 2 Welding current At 25A, it can be fully welded, and at 35A, no overheating or recrystallization occurs. 3 Check reliability 5-10 times magnifying glass can detect cracks and pores of 1mm and above 4 Sensitivity Level 3 sensitivity can detect cracks and pores of 1mm and above 5 Recrystallization inspection Recrystallization inspection using a common standard can reveal recrystallization

[0082] S6, judging the stability of the process, and performing a test piece level test. In this embodiment, a non-single crystal test plate is used to carry out the stability test, three batches, each batch has 10 samples.

[0083] The key process parameters of the first group of tests were: 8h time interval from cleaning to welding, 25A welding current, 5x magnifying glass, and 3-level sensitivity;

[0084] The key process parameters of the second group of tests were: 8h time interval from cleaning to welding, 35A welding current, 5x magnifying glass, and 3-level sensitivity;

[0085] The penetration rate, maximum pore diameter, and crack rate of the above two groups of 60 samples are calculated. If cracks occur, the penetration is not 100%, and recrystallization occurs, the stability fails, and it is necessary to return to step S2 to redefine the key performance indicators; if the result is no cracks, 100% penetration, no recrystallization, and the maximum pore diameter CPK is less than 1.0, the stability fails, and it is necessary to return to step S2 to redefine the key performance indicators; if no cracks occur, 100% penetration, no recrystallization, and the maximum pore diameter CPK is greater than or equal to 1.0, the stability passes, and enters step S7;

[0086] S7, sorting out the execution results of steps S1-S6 in two typical usage scenarios, generating and publishing a trial draft of the process standard corresponding to the process;

[0087] S8, within the expected scope of use, product-level testing is carried out under the first typical usage scenario, and typical products are trial-produced using the process standard trial draft, that is, non-single crystal blades are used for testing, three batches, 2 samples in each batch.

[0088] The key process parameters of the first group of tests were: 8h time interval from cleaning to welding, 25A welding current, 5x magnifying glass, and 3-level sensitivity;

[0089] The key process parameters of the second group of tests were: 8h time interval from cleaning to welding, 50A welding current, 5x magnifying glass, and 3-level sensitivity;

[0090] The penetration rate, maximum pore diameter, and crack rate of the above two groups of 12 samples are calculated. If they are not satisfied, return to step S2 and redefine the key performance indicators; if no cracks occur, 100% penetration, and the maximum pore diameter is less than 1.0 mm, the test verification requirements are met and proceed to the next step.

[0091] S8, within the expected use range, product-level testing is carried out in the second typical use scenario, and typical products are trial-produced using the process standard trial draft, that is, single-crystal blades are used for testing, three batches, 2 samples in each batch.

[0092] The key process parameters of the first group of tests were: 8h time interval from cleaning to welding, 25A welding current, 5x magnifying glass, and 3-level sensitivity;

[0093] The key process parameters of the second group of tests were: 8h time interval from cleaning to welding, 50A welding current, 5x magnifying glass, and 3-level sensitivity;

[0094] The penetration rate, maximum pore diameter, and crack rate of the above two groups of 12 samples are calculated. If they are not satisfied, return to step S2 and redefine the key performance indicators. If no cracks occur, 100% penetration, and the maximum pore diameter is less than 1.0 mm, the test verification requirements are met and the next step is entered. When the product-level tests conducted in two typical usage scenarios meet the test verification requirements, step S9 is entered.

[0095] S9, collating the execution results of steps S1-S6 and S8, generating and submitting the process standard verification analysis report corresponding to the process for airworthiness compliance review. If the airworthiness compliance review is passed, the process standard can be officially released.

[0096] Figure 2 The flowchart of the process standard establishment system for airworthiness compliance according to one embodiment of the present invention is shown. As shown in the figure, the present invention also provides a process standard establishment system 200 for airworthiness compliance, which is applicable to the process standard establishment method described above. The process standard establishment system 200 includes:

[0097] A usage scope establishing unit 201 is used to determine the expected usage scope of the process;

[0098] A key performance indicator establishing unit 202, for determining key performance indicators of the process based on the expected scope of use;

[0099] A key process route establishing unit 203 is used to determine a key process route based on key performance indicators;

[0100] A key parameter establishing unit 204 is used to determine key control elements and key process parameters based on the key process route;

[0101] A parameter control range establishing unit 205 is used to determine the control range of key process parameters;

[0102] A judgment unit 206 is used to judge the stability of the process, based on N batches of running the process, to verify the impact of random factors on key performance indicators;

[0103] The publishing unit 207 is used to organize the expected use scope, key performance indicators, key process routes, key control elements and key process parameters, control ranges, and the operation results of the judgment unit, and generate and publish the process standard trial draft corresponding to the process;

[0104] Verification unit 208, used to perform verification tests on typical products;

[0105] The submission unit 209 is used to organize the expected scope of use, key performance indicators, key process routes, key control elements and key process parameters, control range, and verification results of the verification unit, and generate and submit the process standards corresponding to the process for airworthiness compliance review.

[0106] The present invention also provides a device for establishing process standards for airworthiness compliance, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of any of the aforementioned methods for establishing process standards for airworthiness compliance.

[0107] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the aforementioned methods for establishing process standards for airworthiness compliance.

[0108] Among them, the specific implementation methods and technical effects of the process standard establishment system, establishment equipment, and computer-readable storage medium can all be found in the embodiments of the process standard establishment method for airworthiness compliance provided by the above-mentioned present invention, and will not be repeated here.

[0109] The present invention provides a method, system, device and computer-readable storage medium for establishing process standards for airworthiness compliance, which fully combines the requirements for establishing and verifying process standards, and promotes the process standard development process and the verification process simultaneously, effectively reducing the entire cycle of standard establishment and verification; at the same time, the test data of the process standard development process can be used simultaneously to demonstrate airworthiness compliance verification, effectively saving R&D costs. It should be noted that in order to fully demonstrate the effectiveness of the research data generated by the process of establishing process standards for airworthiness, the data generation, processing and analysis processes should be effectively controlled to ensure the standardization, traceability and integrity of the entire data chain. At the same time, based on the requirements of airworthiness regulations, appropriate statistical methods should be used in the process of establishing process standards to meet airworthiness requirements.

[0110] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. The technician may implement the described functionality in different ways for each specific application, but such implementation decisions should not be interpreted as resulting in a departure from the scope of the present invention.

[0111] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration.

[0112] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components.

[0113] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0114] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A method for establishing a process standard for airworthiness compliance, wherein the process standard is applicable to an aircraft engine, and the method for establishing the process standard comprises the following steps: S1, determine the expected scope of use of a process; S2, determining key performance indicators of the process based on the expected scope of use; S3, determining a key process route based on the key performance indicators; S4, determining key control factors and key process parameters based on the key process route; S5, determining the control range of the key process parameters; S6, determining the stability of the process, performing a wafer-level test, and running the process based on N batches to verify the impact of random factors on the key performance indicators. If the stability meets the requirements, proceed to step S7; if the stability does not meet the requirements, return to step S2 to redetermine the key performance indicators. S7, collating the execution results of steps S1-S6, generating and publishing a trial draft of the process standard corresponding to the process; S8, perform product-level testing within the expected use range, use the process standard trial version to trial-produce typical products, analyze the production process capability, and perform verification tests on the typical products. If the test verification requirements are met, proceed to step S9; if the test verification requirements are not met, return to step S2 and redefine the key performance indicators; S9, collating the execution results of steps S1-S6 and S8, generating and submitting a process standard verification analysis report corresponding to the process for airworthiness compliance review.

2. The method for establishing process standards for airworthiness compliance according to claim 1, characterized in that: In step S1, the expected usage scope includes typical usage scenarios. If there are multiple typical usage scenarios, the typical usage scenarios are classified.

3. The method for establishing process standards for airworthiness compliance according to claim 2, characterized in that: In step S2, the key performance indicators are used to characterize the product quality level expected to be achieved under the process control.

4. The method for establishing process standards for airworthiness compliance according to claim 1, characterized in that: In step S4, the correlation between the key control factors and key process parameters is studied through experimental design, and the correlation between the key process parameters and key performance indicators is established.

5. The method for establishing process standards for airworthiness compliance according to claim 4, characterized in that: In step S5, the acceptable design space of the key process parameters is studied based on experimental design, the mathematical relationship between the key process parameters and key performance indicators is established through multiple batch experiments, a fitting formula or response surface is established, and the control range of the key process parameters is determined according to the fitting formula or the corresponding surface.

6. The method for establishing process standards for airworthiness compliance according to claim 1, characterized in that: N is greater than or equal to 3.

7. The method for establishing process standards for airworthiness compliance according to claim 1, characterized in that: In step S8, the process capability of the trial production is analyzed, taking into account the scale effect of the typical product and the size structure effect of the product.

8. A process standard establishment system for airworthiness compliance, applicable to the process standard establishment method according to claim 1, characterized in that: The process standard establishment system includes: A scope of use establishing unit for determining the expected scope of use of the process; A key performance indicator establishing unit, used to determine the key performance indicators of the process based on the expected scope of use; A key process route establishing unit, used for determining a key process route based on the key performance indicators; A key parameter establishment unit, used to determine key control elements and key process parameters based on the key process route; A parameter control range establishing unit, used to determine the control range of the key process parameters; A judgment unit, used to judge the stability of the process, and to run the process based on N batches to verify the influence of random factors on the key performance indicators; A publishing unit, used to organize the expected use scope, key performance indicators, key process routes, key control elements and key process parameters, the control scope, and the operation result of the judgment unit, and generate and publish a trial version of the process standard corresponding to the process; A verification unit, used for conducting verification tests on the typical products; The submission unit is used to organize the expected scope of use, key performance indicators, key process routes, key control elements and key process parameters, the control range, and the verification results of the verification unit, and generate and submit the process standard verification analysis report corresponding to the process for airworthiness compliance review.

9. A device for establishing process standards for airworthiness compliance, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for establishing process standards for airworthiness compliance as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for establishing process standards for airworthiness compliance as described in any one of claims 1 to 7 are implemented.

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