An airworthiness compliance-oriented process standard establishment method, establishment system, establishment device and computer readable storage medium

Abstract

The application relates to a process standard establishment method, an establishment system, an establishment device and a computer readable storage medium facing airworthiness compliance. The process standard establishment method comprises the following steps: S1, determining an expected use range of a certain process; S2, determining a key performance index of the process; S3, determining a key process route; S4, determining a key control element and a key process parameter; S5, determining a control range of the key process parameter; S6, judging the stability of the process; S7, issuing a process standard draft; S8, in the expected use range, using the process standard draft to produce typical products, analyzing production process capacity, and performing verification tests; and S9, submitting a process standard verification analysis report corresponding to the process. The application provides a process standard establishment method, an establishment system, an establishment device and a computer readable storage medium facing airworthiness compliance, which can effectively save a process standard establishment period and reduce test costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of airworthiness compliance verification, in particular to a process standard establishment method, system and device for airworthiness compliance, and a computer readable storage medium. BACKGROUND

[0002] In order to ensure the safety of civil aircraft, maintain the public interest, and promote the development of the aviation industry, the airworthiness authority has promulgated airworthiness regulations for aircraft engines, which stipulate the minimum safety level of civil aviation engines. Manufacturing process is an important process to ensure that the product always meets the design intent, and needs to be strictly controlled by technical standards to ensure that a perfect structure is always produced. Among them, the manufacturing method of paragraph 605 of CCAR25 department of airworthiness clause "China civil aviation transport category aircraft airworthiness standards" points out that: a) the manufacturing method used must be able to produce a perfect structure at all times. If a certain manufacturing method (such as bonding, spot welding or heat treatment) needs to be strictly controlled to achieve this purpose, the process must be executed according to the approved process specification. b) Each new manufacturing method must be verified by test outline. Paragraph 15 of CCAR33 department of airworthiness clause "Aircraft engine airworthiness regulations" points out that: the applicability and durability of the materials used in the engine must meet the following requirements: a) based on experience or test; 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 standard can meet the airworthiness requirements, it is necessary to show the applicability of the technical standard (process standard) and the stability of the manufacturing process, and to complete the airworthiness compliance verification by using the applicable verification method. Due to the late start of civil aircraft development in China, the safety design of civil aircraft is lagging behind, and the research on airworthiness compliance verification has just started. The standard establishment process is not standardized, the airworthiness compliance verification method and verification data are not perfect, which leads to the need to carry out a large number of additional verification tests in the standard airworthiness compliance verification process, increasing the project development cycle and cost. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides a process standard establishment method, system and device for airworthiness compliance, and a computer readable storage medium, which can effectively save the process standard establishment period and reduce the test cost.

[0005] Specifically, the present application provides a process standard establishment method for airworthiness compliance, the process standard is applicable to an aircraft engine, and the process standard establishment method comprises the following steps:

[0006] S1, determining the expected use range of a certain process;

[0007] S2, determining a key performance indicator of the process based on the expected use range;

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

[0009] S4, determining a key control factor and a key process parameter based on the key process route;

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

[0011] S6, judging stability of the process, performing a pilot level test, verifying influence of random factors on the key performance indicator based on N batches of running the process, if the stability meets requirements, entering step S7, if the stability does not meet requirements, returning to step S2 to re-determine the key performance indicator;

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

[0013] S8, performing a product level test within the expected use range, using the process standard draft to produce a typical product, analyzing production process capability, performing a verification test on the typical product, if the verification test meets requirements, entering step S9, if the verification test does not meet requirements, returning to step S2 to re-determine the key performance indicator;

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

[0015] According to one embodiment of the present application, in step S1, the expected use range includes a typical use scenario, if the typical use scenario is multiple, the typical use scenarios are classified.

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

[0017] According to one embodiment of the present application, in step S4, the key control factor and the key process parameter are related by experimental design, and a correlation between the key process parameter and the key performance indicator is established.

[0018] According to one embodiment of the present application, in step S5, based on an acceptable design space of the key process parameter by experimental design, a mathematical relationship between the key process parameter and the key performance indicator is established by multiple batch tests, a fitting formula or a response surface is established, and the control range of the key process parameter is determined according to the fitting formula or the response surface.

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

[0020] According to one embodiment of the present application, in step S8, the process capability of the trial production is analyzed, and the scale effect of the typical product and the size structure effect of the product are comprehensively considered.

[0021] The present application also provides a process standard establishment system for airworthiness compliance, applicable to the process standard establishment method described above, and comprising:

[0022] a use range establishment unit configured to determine an intended use range of the process;

[0023] a key performance indicator establishment unit configured to determine key performance indicators of the process based on the intended use range;

[0024] a key process route establishment unit configured to determine a key process route based on the key performance indicators;

[0025] a key parameter establishment unit configured to determine key control elements and key process parameters based on the key process route;

[0026] a parameter control range establishment unit configured to determine a control range of the key process parameters;

[0027] a judgment unit configured to judge the stability of the process based on N batches of operation of the process to verify the influence of random factors on the key performance indicators;

[0028] a publishing unit configured to compile the intended use range, the key performance indicators, the key process route, the key control elements and the key process parameters, the control range, and the operation results of the judgment unit, generate and publish a process standard draft corresponding to the process;

[0029] a verification unit configured to perform verification tests on the typical product;

[0030] a submission unit configured to compile the intended use range, the key performance indicators, the key process route, the key control elements and the key process parameters, the control range, and the verification results of the verification unit, generate and submit a process standard verification analysis report corresponding to the process for airworthiness compliance review.

[0031] The present application also provides a process standard establishment device for airworthiness compliance, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the process standard establishment method for airworthiness compliance described above when executing the computer program.

[0032] The application further provides a computer readable storage medium, which stores a computer program, and the computer program realizes the steps of the airworthiness compliance-oriented process standard establishment method when executed by a processor.

[0033] The airworthiness compliance-oriented process standard establishment method, establishment system, establishment device and computer readable storage medium provided by the application can effectively save the process standard establishment period and reduce the test cost by integrating the airworthiness compliance verification requirement into the process standard establishment process.

[0034] It should be understood that the above general description and the following detailed description of the application are exemplary and illustrative, and are intended to provide further explanation of the application. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings are included to provide further explanation of the application, which are incorporated into and constitute a part of this application, and show embodiments of the application, and together with the specification, serve to explain the principles of the application. In the drawings:

[0036] Figure 1 A flow chart of the airworthiness compliance-oriented process standard establishment method of one embodiment of the application is shown.

[0037] Figure 2 A flow chart of the airworthiness compliance-oriented process standard establishment system of one embodiment of the application is shown. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments and features in the application can be combined with each other without conflict.

[0039] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the application and its application or use. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0040] 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 application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0041] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples herein are not meant to limit the scope of the present application unless otherwise specifically stated. It is also to be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale, and that for purposes of convenience and clarity in understanding the present application, common terms have been used for like components throughout. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail but are intended to be understood as a part of the specification, where appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the disclosure, thus, once certain parts have been defined throughout the disclosure, further discussion of such parts can not be necessary.

[0042] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", and "top", "bottom" are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the parts themselves.

[0043] In addition, it should be noted that the use of "first", "second", and the like words of similar meaning are used to distinguish between parts of the same type, and do not have special meanings unless otherwise stated, and therefore cannot be construed as limiting the scope of protection of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application can be selected by the applicant according to his or her judgment, and the detailed meanings thereof are explained in the relevant parts of the description. In addition, the present application is to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0044] Airworthiness compliance verification is a mandatory verification work to ensure the safety of aircraft flight. Due to the characteristics of civil aviation engine involving many types of special processes, complex and high process, high process cost, long production cycle and the like, the airworthiness clauses require to establish applicable technical standards to strictly control the production process, so the manufacturer needs to show the applicability of the standard to the airworthiness representative. The traditional process standard establishment and airworthiness compliance verification are often independent of each other: in the standard establishment process, the standard is gradually improved through random and multiple iteration tests, and after the completion of the standard establishment, the airworthiness compliance verification test is carried out separately. Under this mode, the process standard establishment and verification period is long, and due to the large number of iterations, the total test amount is large, and there is a certain cost waste. Based on this, the present application 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 purpose of shortening the establishment period and reducing the test cost.

[0045] Figure 1 The flow chart of the process standard establishment method for airworthiness compliance of one embodiment of the present application is shown. As shown in the figure, the present application provides a process standard establishment method for airworthiness compliance, which is applicable to an aero-engine. The process standard establishment method comprises the following steps:

[0046] S1, determining the expected use range of a certain process. According to the opinions of the process standard demander of the process, the typical use scene of the process is determined.

[0047] S2, based on the expected use range, determining the key performance indicators expected to be reached by the process. According to the opinions of the process standard demander of the process, the corresponding key performance indicators are determined.

[0048] S3, based on the key performance indicators, determining the key process route. The key process route of the process is determined in the laboratory environment in combination with the existing public technical theory and knowledge achievements.

[0049] S4, based on the key process route, determining the key control elements and key process parameters;

[0050] S5, determining the control range of the key process parameters;

[0051] S6, judging the stability of the process, performing the test piece level test, based on N batches of running process, to verify the influence of random factors on the key performance indicators, if the stability meets the requirements, then entering step S7, if the stability does not meet the requirements, then returning to step S2 to re-determine the key performance indicators;

[0052] S7, arranging the execution results of steps S1-S6, generating and publishing the process standard draft corresponding to the process;

[0053] S8, product level testing is performed within the intended use range, a typical product is trial-produced using the process standard draft, the production process capability is analyzed, and a verification test is performed on the typical product. If the verification test requirements are met, step S9 is entered. If the verification test requirements are not met, step S2 is returned to, and the key performance indicators are re-determined;

[0054] S9, the execution results of steps S1-S6 and S8 are arranged, a process standard verification analysis report corresponding to the process is generated and submitted for airworthiness compliance review. If the airworthiness compliance review is passed, the process standard can be officially released.

[0055] Preferably, in step S1, the intended use range includes typical use scenarios. If there are multiple typical use scenarios, the typical use scenarios are classified. The classification of the typical use scenarios is consistent with the subsequent standard airworthiness compliance verification analysis report.

[0056] Preferably, in step S2, the key performance indicators are used to represent 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.

[0057] Preferably, in step S4, the DOE (DESIGN OF EXPERIMENT) is used to study the correlation between the key control elements and the key process parameters, and the correlation between the key process parameters and the key performance indicators is established. The key process parameters are important verification contents of the process standard airworthiness compliance verification. The experimental design data results are used to support the basis for screening key parameters in airworthiness compliance verification. The screened key process parameters are consistent with the parameters of the subsequent standard airworthiness compliance verification report.

[0058] Preferably, in step S5, the acceptable design space of the key process parameters is established based on the experimental design. The mathematical relationship between the key process parameters and the key performance indicators is established through multiple batch tests. A fitting formula or a response surface is established. The control range of the 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 requirement of airworthiness compliance verification. Therefore, the experimental design in steps S4 and S5 should establish a comprehensive and statistical test matrix to obtain an effective control range of the key process parameters.

[0059] Preferably, in step S6, N is greater than or equal to 3. That is, in a laboratory environment, the process is used through at least 3 batches of running to fully verify the influence level of random factors on the key performance indicators, to show the batch stability and in-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 required by airworthiness.

[0060] Preferably, in step S8, the process capability of the trial production is analyzed, the scale effect of the typical product and the size structure effect of the product are comprehensively considered, and corresponding data are obtained to show the applicability of the airworthiness requirements. For the verification test of the typical product, such as dissection, examination test, etc., the verification test data obtained are used to show the applicability of the typical product.

[0061] The method for establishing a process standard for airworthiness compliance provided by the present application is described in detail below through an embodiment. In this embodiment, the process is: argon arc welding of a turbine blade of an aero-engine, and the method for establishing a process standard includes the following steps:

[0062] S1, determining the expected use range of argon arc welding of a turbine blade of an aero-engine. According to the opinions of the process standard demander of the process, it is determined that there are two typical use scenarios of the process, one is argon arc welding of a non-single crystal turbine blade, and the other is argon arc welding of a single crystal turbine blade.

[0063] For the first typical use scenario, argon arc welding of a non-single crystal turbine blade, step S2 is performed.

[0064] S2, determining the key performance indicators expected to be achieved based on argon arc welding of a non-single crystal turbine blade. According to the opinions of the process standard demander of the process, it is determined that the corresponding key performance indicators are: 100% penetration, pore diameter not more than 1mm, and no cracks.

[0065] S3, determining the key process route based on the aforementioned key performance indicators. In combination with existing public technical theories and knowledge achievements, the key process route of the process is determined in a laboratory environment: 1. cleaning; 2. welding; 3. visual inspection; 4. fluorescent inspection.

[0066] S4, determining the key control elements and key process parameters based on the aforementioned key process route. The determination result is: 1. in the cleaning step, the key process parameter is the cleaning-to-welding time interval; 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; and 4. in the fluorescent inspection step, the key process parameter is the sensitivity.

[0067] S5, determining the control range of the key process parameters, as shown in the following table 1.

[0068] Table 1

[0069] Key process parameters Control range 1 Cleaning to welding time interval No significant oxidation, contamination occurs when not more than 8 h 2 Welding current Full penetration is possible at 25 A, no overheating occurs at 50 A 3 Inspection reliability 1 mm and above cracks, porosities can be detected by 5-10 times magnifying glass 4 Sensitivity 1 mm and above cracks, porosities can be detected by 3rd level sensitivity

[0070] 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 a stability test, three batches, 10 samples per batch.

[0071] The first group of test key process parameters: cleaning to welding time interval 8h, welding current 25A, 5 times magnifying glass, 3 level sensitivity;

[0072] The second group of test key process parameters: cleaning to welding time interval 8h, welding current 50A, 5 times magnifying glass, 3 level sensitivity;

[0073] The penetration rate, the maximum diameter of pores, and the crack rate of the above two groups of 60 samples are calculated. If cracks occur and 100% penetration does not occur, the stability does not pass and needs to return to step S2 to re-determine the key performance indicators. If the results are no cracks, 100% penetration, and the maximum diameter of pores CPK is less than 1.0, the stability does not pass and needs to return to step S2 to re-determine the key performance indicators. If there are no cracks, 100% penetration, and the maximum diameter of pores CPK is greater than or equal to 1.0, the stability passes and enters the next step.

[0074] At this point, for the first typical use scenario, non-single crystal turbine blade argon arc welding, the test piece level test meets the test verification requirements. Next, for the second typical use scenario, single crystal turbine blade argon arc welding, step S2 is executed.

[0075] S2, based on single crystal turbine blade argon arc welding, determine the key performance indicators that the process is expected to achieve. According to the process standard requirements of the process, the corresponding key performance indicators are determined as: 100% penetration, pore diameter not more than 0.5mm, no cracks, no recrystallization.

[0076] S3, based on the aforementioned key performance indicators, determine the key process route. Based on existing public technical theories and knowledge achievements, the key process route of the process is determined in a laboratory environment: 1. cleaning; 2. welding; 3. visual inspection; 4. fluorescence inspection; 5. recrystallization inspection.

[0077] S4, based on the aforementioned key process route, determine the key control elements and key process parameters. The determination result is: 1. in the cleaning step, the key process parameter is the cleaning to welding time interval; 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 fluorescence inspection step, the key process parameter is the sensitivity; 5. in the recrystallization inspection step, the key process parameter is the recrystallization inspection method.

[0078] S5, determine the control range of the key process parameters, refer to Table 2 below;

[0079] Table 2

[0080] Key process parameters Control range 1 Cleaning to welding time interval No significant oxidation, contamination occurs when not more than 8 h 2 Welding current Full penetration is possible at 25 A, no overheating, recrystallization occurs at 35 A 3 Inspection reliability 1 mm and above cracks, porosities can be detected by 5-10 times magnifying glass 4 Sensitivity 1 mm and above cracks, porosities can be detected by 3rd level sensitivity 5 Recrystallization inspection Recrystallization can be found by using a certain general standard to carry out recrystallization inspection

[0081] S6, judge the stability of the process, carry out test piece level test, in this embodiment, non-single crystal test plate is used to carry out stability test, three batches, 10 samples per batch.

[0082] The first group of test key process parameters: the interval between cleaning and welding is 8h, the welding current is 25A, 5 times magnifying glass, 3 level sensitivity;

[0083] The second group of test key process parameters: the interval between cleaning and welding is 8h, the welding current is 35A, 5 times magnifying glass, 3 level sensitivity;

[0084] The penetration rate, the maximum diameter of pores and the crack rate of the above two groups of 60 samples are calculated, if cracks occur, 100% penetration is not achieved, recrystallization occurs, the stability does not pass, and it is necessary to return to step S2 to re-determine the key performance indicators; if the results are no cracks, 100% penetration, no recrystallization, and the maximum diameter of pores CPK is less than 1.0, the stability does not pass, and it is necessary to return to step S2 to re-determine the key performance indicators; if no cracks, 100% penetration, no recrystallization, and the maximum diameter of pores CPK is greater than or equal to 1.0, the stability passes, and enters step S7;

[0085] S7, arrange the execution results of steps S1-S6 under two typical use scenarios, generate and publish the process standard draft;

[0086] S8, in the expected use range, product level test is carried out under the first typical use scenario, and the process standard draft is used to produce typical products, that is, non-single crystal blades are used to carry out test, three batches, 2 samples per batch.

[0087] The first group of test key process parameters: the interval between cleaning and welding is 8h, the welding current is 25A, 5 times magnifying glass, 3 level sensitivity;

[0088] The second group of test key process parameters: the interval between cleaning and welding is 8h, the welding current is 50A, 5 times magnifying glass, 3 level sensitivity;

[0089] The penetration rate, the maximum diameter of pores and the crack rate of the above two groups of 12 samples are calculated, if not satisfied, return to step S2 to re-determine the key performance indicators; if no cracks occur, 100% penetration is achieved, and the maximum diameter of pores is less than 1.0mm, the test verification requirement is met, and the next step is entered.

[0090] S8, in the expected use range, product level test is carried out under the second typical use scenario, and the process standard draft is used to produce typical products, that is, single crystal blades are used to carry out test, three batches, 2 samples per batch.

[0091] The first group of test key process parameters: the interval between cleaning and welding is 8h, the welding current is 25A, 5 times magnifying glass, 3 level sensitivity;

[0092] The second group of test key process parameters: cleaning to welding time interval 8h, welding current 50A, 5 times magnifying glass, 3 level sensitivity;

[0093] The penetration rate, the maximum diameter of pores and the crack rate of the above two groups of 12 samples are calculated, if not meeting, return to step S2, and the key performance indicators are re-determined; if no crack occurs, 100% penetration, and the maximum diameter of pores is less than 1.0mm, the test verification requirements are met, and the next step is entered. When the product level test under two typical use scenarios is met, the test verification requirements are met, and step S9 is entered.

[0094] S9, collate the execution results of steps S1-S6 and S8, generate and submit a process standard verification analysis report corresponding to the process to perform airworthiness compliance review. If the airworthiness compliance review is passed, the process standard can be formally released.

[0095] Figure 2 The flow chart of the airworthiness compliance-oriented process standard establishment system of one embodiment of the present application is shown. As shown in the figure, the present application also provides an airworthiness compliance-oriented process standard establishment system 200, which is applicable to the process standard establishment method described above. The process standard establishment system 200 comprises:

[0096] The use range establishment unit 201 is used to determine the expected use range of the process;

[0097] The key performance indicator establishment unit 202 is used to determine the key performance indicators of the process based on the expected use range;

[0098] The key process route establishment unit 203 is used to determine the key process route based on the key performance indicators;

[0099] The key parameter establishment unit 204 is used to determine the key control elements and key process parameters based on the key process route;

[0100] The parameter control range establishment unit 205 is used to determine the control range of the key process parameters;

[0101] The judgment unit 206 is used to judge the stability of the process, based on N batches of running processes, to verify the influence of random factors on the key performance indicators;

[0102] The release unit 207 is used to collate the expected use range, the key performance indicators, the key process route, the key control elements and the key process parameters, the control range, and the running results of the judgment unit, to generate and release the process standard draft corresponding to the process;

[0103] The verification unit 208 is used to perform verification test on the typical product;

[0104] The submission unit 209 is configured to arrange the intended use range, the key performance indicator, the key process route, the key control element and the key process parameter, the control range, and the verification result of the verification unit, generate and submit the process corresponding process standard for airworthiness compliance review.

[0105] The present application also provides a process standard establishment device for airworthiness compliance, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor implements the steps of any one of the process standard establishment methods for airworthiness compliance.

[0106] The present application also provides a computer readable storage medium having a computer program stored thereon, and the computer program is executed by the processor to implement the steps of any one of the process standard establishment methods for airworthiness compliance.

[0107] The specific implementation manners and technical effects of the process standard establishment system, the establishment device and the computer readable storage medium can be referred to the above-mentioned embodiments of the process standard establishment method for airworthiness compliance provided by the present application, and will not be repeated here.

[0108] The process standard establishment method, the establishment system, the establishment device and the computer readable storage medium provided by the present application fully combine the process standard establishment and verification requirements, synchronously promote the process standard development process and the verification process, effectively reduce the whole cycle of standard establishment and verification; at the same time, the test data of the process standard development process can be used for airworthiness compliance verification synchronously, effectively saving the research and development cost. It should be noted that, in order to fully show the effectiveness of the research data generated in the process standard establishment process for airworthiness, the data generation, processing and analysis process should be effectively controlled to ensure the standardization, traceability and integrity of the whole data chain. At the same time, based on the requirements of airworthiness regulations, appropriate statistical methods should be used in the process standard establishment process to meet the airworthiness requirements.

[0109] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0110] The various illustrative logical blocks, circuits, and circuits described in connection with the embodiments disclosed herein can be implemented or performed 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. The general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can 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 conjunction with a DSP core, or any other such configuration.

[0111] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, 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 the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In the alternative, the processor and the storage medium can reside as discrete components in a user terminal.

[0112] In one or more exemplary embodiments, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0113] Various modifications and variations can be made to the above exemplary implementations without departing from the spirit and scope of the application. Therefore, it is intended that the application cover modifications and variations of the application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A method for establishing process standards for airworthiness compliance, wherein the process standards are applicable to aero engines, and the method for establishing process standards includes the following steps: S1, determine the expected scope of application of a certain process; S2, Based on the expected scope of use, determine the key performance indicators of the process; S3. Based on the aforementioned key performance indicators, determine the key process route; S4. Based on the aforementioned key process route, determine the key control elements and key process parameters; S5, determine the control range of the key process parameters; S6. Determine the stability of the process and conduct sample-level testing. Run 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 and redetermine the key performance indicators. S7. Organize the execution results of steps S1-S6, generate and publish the trial draft of the process standard corresponding to the process. S8. Conduct product-level testing within the expected usage range, trial-produce typical products using the process standard draft, analyze the production process capability, and conduct 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 redetermine the key performance indicators. S9. Organize the execution results of steps S1-S6 and S8, generate and submit the process standard verification and analysis report corresponding to the process for airworthiness compliance review.

2. The method for establishing process standards for airworthiness compliance as described in claim 1, characterized in that, In step S1, the expected scope of use 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 as described in 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 as described in claim 1, characterized in that, In step S4, the correlation between the key control elements 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 as described in 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 corresponding surface.

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

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

8. A process standard establishment system for airworthiness compliance, applicable to the process standard establishment method described in claim 1, characterized in that, The process standard establishment system includes: The scope of application establishment unit is used to determine the expected scope of application of the process; A key performance indicator establishment unit is used to determine the key performance indicators of the process based on the expected scope of use. A critical process route establishment unit is used to determine the critical process route based on the aforementioned critical performance indicators. The key parameter establishment unit is used to determine key control elements and key process parameters based on the key process route. A parameter control range establishment unit is used to determine the control range of the key process parameters; The judgment unit is used to judge the stability of the process by running the process in N batches to verify the impact of random factors on the key performance indicators. The publishing unit is used to compile the expected scope of use, key performance indicators, key process routes, key control elements and key process parameters, the control range, and the operation results of the judgment unit, and generate and publish the trial version of the process standard corresponding to the process. The verification unit is used to conduct verification tests on the typical product. The submission unit is used to compile 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 process standard establishment device 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, it implements the steps of the method for establishing process standards for airworthiness compliance as described in any one of claims 1-7.

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

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