Power supply filter circuit expert system and implementation method thereof

Abstract

The invention belongs to the technical field of filter circuits, and particularly relates to a power filter circuit expert system and an implementation method thereof.The power filter circuit expert system comprises a data input module, an electromagnetic compatibility analysis module, a database module, a simulation analysis module and a filter manufacturing and testing module, and the data input module is connected with the electromagnetic compatibility analysis module; the electromagnetic compatibility analysis module is connected with the database module; the database module is connected with the simulation analysis module; and the simulation analysis module is connected with the filter manufacturing and testing module. According to the invention, through intelligent simulation and artificial intelligence technologies, an efficient and accurate filter circuit design process is realized. The system integrates an electromagnetic compatibility analysis module, a simulation optimization module and an element database management module, supports rapid iterative design and automatic generation of a test scheme, ensures that the filter design meets an electromagnetic compatibility standard and user requirements, and remarkably improves the design efficiency and accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of filter circuits, and in particular relates to a power filter circuit expert system and an implementation method thereof. Background Art

[0002] Existing filter design systems often rely on manual work to carry out multiple rounds of calculations, verifications, and tests. This forces engineers to frequently adjust parameters and verify them repeatedly, which greatly prolongs the design cycle and makes the efficiency very low. Due to the high complexity of manual operation itself, any slight negligence in the process of parameter input or component selection is likely to cause deviations in the analysis results, thereby greatly increasing the uncertainty of filter performance. The traditional design process is seriously lacking in the level of intelligence, and its design process relies heavily on the long-term experience accumulated by engineers, which undoubtedly increases the threshold and difficulty of design work. Not only that, there is also a lack of an efficient linkage mechanism between the simulation link and the actual test link, which makes it difficult for the simulation results to accurately reflect the performance of the actual product, further exacerbating the difficulty of design work. Summary of the invention

[0003] In view of the technical problem that the above-mentioned traditional design process is seriously insufficient in terms of intelligence, the present invention provides a power filter circuit expert system and its implementation method, which realizes the intelligent design and optimization of the filter by analyzing the equipment conduction emission data, equipment conduction limit and filter environmental adaptability, safety and other parameters. The system includes an electromagnetic compatibility analysis module, a simulation analysis module, a filter circuit and device database module and a filter parameter optimization module, and improves the performance and compliance of the filter through the expert database and test feedback mechanism.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A power filter circuit expert system comprises a data input module, an electromagnetic compatibility analysis module, a database module, a simulation analysis module, and a filter manufacturing and testing module. The data input module is connected to the electromagnetic compatibility analysis module, and the data input module is used to obtain the conducted emission data of the equipment and the technical requirements of the filter; the electromagnetic compatibility analysis module is connected to the database module, and the electromagnetic compatibility analysis module analyzes the input data and generates an analysis report; the database module is connected to the simulation analysis module, and the simulation analysis module is responsible for simulating the filter circuit and generating a simulation report to verify its performance; if the simulation result does not meet the requirements, the parameter optimization module will automatically correct the parameters and re-simulate; the simulation analysis module is connected to the filter manufacturing and testing module, and the filter manufacturing and testing module manufactures the filter according to the optimized parameters and tests it to ensure that its performance meets the standards.

[0006] It also includes an expert library module, which is connected to the filter production and testing module and is used to store and call expert design solutions to provide intelligent support for design optimization.

[0007] The database module includes a filter circuit parameter database and a filter element database, and the electromagnetic compatibility analysis module is respectively connected to the filter circuit parameter database and the filter element database, and the filter circuit parameter database and the filter element database are both connected to the simulation analysis module.

[0008] A method for implementing a power supply filter circuit expert system comprises the following steps:

[0009] S1. The system first receives and records the conducted emission data of the equipment. These data usually come from the previous test links or the performance parameters of the equipment, including the noise level in power transmission, the transmission frequency range, the interference intensity and other information; these data provide a basic reference for the subsequent electromagnetic spectrum characteristics analysis; in addition, the system also needs to record the technical requirements of the filter, including the specific filtering frequency band, insertion loss, voltage drop, insulation resistance, withstand voltage, leakage current, environmental adaptability requirements and the physical size limit of the filter. The filtering frequency band includes low pass, high pass, band pass and band stop; at the same time, the system supports the selection of corresponding conducted emission limits according to the standards of different countries or regions to ensure that the final designed filter meets the international and regional electromagnetic compatibility specifications; users can also customize technical parameters for specific application scenarios to meet the special needs of different fields;

[0010] S2. After obtaining the input data, the system first conducts a comprehensive analysis of the conducted emission data of the device through the built-in electromagnetic compatibility analysis module; the module compares the emission data of the device with the selected emission limit standard, identifies the frequency band where the emission exceeds the standard and the possible cause of interference; at the same time, the system calls the filter circuit parameter database and the filter component database to preliminarily give filter design suggestions or improvement directions; during the analysis process, the system generates visual charts, including spectrum charts, emission intensity bar charts and interference distribution charts, to help users intuitively analyze emission problems;

[0011] S3. The preliminary analysis report will list in detail the detected critical frequency bands exceeding the standard, possible interference causes and recommended filtering methods;

[0012] S4. After completing the data input and preliminary analysis, the system immediately starts the electromagnetic compatibility analysis module to conduct a comprehensive comparative analysis of the equipment's conducted emission data with the preset standards;

[0013] S5. After completing the electromagnetic compatibility analysis of the input data, the system automatically calls the filter circuit parameter database and the filter component database to generate a filtering solution for the current device; the parameter database stores a variety of typical circuit parameter combinations, such as inductance, capacitance and impedance values ​​in different frequency bands, while the component database covers the specification information of various filter components, including physical dimensions, materials, electrical characteristics and supply chain data; the system matches the optimal parameter combination from the database according to the specific needs and analysis results of the device, and automatically generates multiple simulation models;

[0014] S6. In the simulation analysis stage, the system comprehensively simulates the performance of the filter circuit model and evaluates its emission suppression effect and power transmission characteristics under different working conditions. The simulation report will show whether the amplitude value of the filter's amplitude-frequency curve is lower than the standard threshold value of the relevant standard. If the simulation results show that the current design does not meet the requirements, the system will automatically enter the optimization stage and start the parameter optimization module. Based on the simulation results, the system may recommend adjusting the parameters of the inductor and capacitor to optimize the filtering effect, or reselect more suitable component specifications from the component database. The system also recommends changing the structural design of the filter, including adding multi-stage filtering or adjusting the layout of series and parallel circuits to better cope with interference in specific frequency bands. The optimized parameters will be applied to the simulation model again and re-simulated and verified. The process will be iterated repeatedly until the simulation results show that the design is completely below the conducted emission limit and meets other technical requirements of the filter. After the design passes the simulation verification, the system generates a production instruction and enters the filter production and testing stage to ensure that the performance of the final product meets the standard requirements.

[0015] S7. When the simulation scheme has been verified for multiple rounds and the verification results meet the conducted emission requirements and the technical requirements of the filter, the system will generate detailed production instructions and enter the filter production stage;

[0016] S8, During the testing phase, the system uses professional testing equipment to test the insertion loss and electrical performance of the filter in each frequency band, and compares and analyzes the test data with the simulation results;

[0017] S9. If the test results deviate from the simulation results or exceed the standard limit, the system will activate the feedback mechanism to analyze the cause of the error.

[0018] The preliminary analysis report in S3 also includes a rationality evaluation of the input parameters, which includes whether the amount of data is correct and whether the input parameters are logically reasonable. In addition, the system will prompt whether further simulation or parameter adjustment is needed to ensure the effectiveness of the filtering solution and provide optimization suggestions.

[0019] The system in S4 analyzes the noise and interference in different frequency bands through spectrum analysis, and identifies the frequency bands with excessive emissions and potential interference sources, such as power supply noise or high-frequency signal interference; in this process, the system generates detailed visual charts, including spectrum charts, bar charts, and interference intensity curves, to help users intuitively understand the electromagnetic spectrum characteristics of the device; after the analysis is completed, the system will generate a preliminary analysis report, which covers the emission performance of key frequency bands, excessive items, possible interference causes, and preliminary filtering suggestions, such as using low-pass filters or band-stop filters to eliminate interference in specific frequency bands; if the amplitude value of the device's amplitude-frequency curve is lower than but close to the standard limit, the system will also give further optimization suggestions, prompting the user whether simulation analysis is needed.

[0020] The multiple simulation models in S5 include high-pass, low-pass, band-pass or band-stop filters, and even combine multi-stage filtering solutions to deal with complex interference situations; at the same time, the system also provides the most cost-effective design solution based on the price and performance balance of the components to ensure that the performance requirements of the equipment are met while controlling costs; users can choose the optimal design from multiple solutions and fine-tune the parameters to prepare for the next simulation.

[0021] The production phase of the filter in S7 is as follows: the system guides the engineering team to select components that meet the specifications based on the optimized circuit parameters, and builds the filter circuit according to the design plan; during the production process, the system monitors each key step to ensure that the installation, connection and parameter setting of the components fully meet the design requirements of the simulation model; after the filter is assembled, it will be sent to the test phase for conducted emission detection to verify its electromagnetic compatibility characteristics under actual working conditions.

[0022] The method for comparing and analyzing the test data with the simulation results in S8 is: if the test results show that the filtering performance and electrical performance of the filter meet the requirements, the design is deemed to be successful, and the system will store the design scheme together with detailed information such as test data and optimization process records in the expert library; these archived data can not only provide reference and support for future designs, but also provide intelligent recommendation schemes for filter designs in similar application scenarios, thereby improving the self-learning ability of the system; if future design requirements are similar to this scheme, the system will automatically call the design in the expert library and further optimize it according to the new requirements.

[0023] The method for analyzing the cause of the error in S9 is as follows: the system will prompt to re-check the parameter consistency of the components, check the integrity of the circuit connection, or add more realistic boundary conditions in the simulation model to narrow the gap between the simulation and the actual test; once the adjustment is completed, the system will retest the filter and archive the design after verification; through this closed-loop feedback mechanism, the system can not only make the equipment achieve the ideal electromagnetic compatibility characteristics as much as possible, but also continuously accumulate optimization experience and gradually improve the accuracy and efficiency of future designs.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention realizes efficient and accurate power supply filter circuit design through automated analysis and intelligent simulation technology. The system integrates electromagnetic compatibility analysis module, simulation optimization module, filter circuit database module and component database management module, supports rapid iterative design and automatic generation of design solutions, ensures that the design meets the requirements of electromagnetic compatibility standards, significantly improves design efficiency and accuracy, and meets the multi-tendency requirements of users. Through the expert system of the present invention, multiple repeated calculations and verifications in the design process will be automatically performed by the system, and the optimal design path will be recommended based on the parameters in the database and the existing solutions, thereby greatly shortening the design cycle and improving production efficiency. In addition, the system's built-in feedback adjustment mechanism can also automatically optimize designs that do not meet the standards, further improving the quality and performance of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the drawings required for the implementation methods or the description of the prior art are briefly introduced below. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0028] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. These descriptions are only to further illustrate the features and advantages of the present invention, rather than to limit the claims of the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] A power filter circuit expert system, such as Figure 1As shown, it includes a data input module, an electromagnetic compatibility analysis module, a database module, a simulation analysis module, and a filter manufacturing and testing module. The data input module is connected to the electromagnetic compatibility analysis module, and the data input module is used to obtain the conducted emission data of the equipment and the technical requirements of the filter; the electromagnetic compatibility analysis module is connected to the database module, and the electromagnetic compatibility analysis module analyzes the input data and generates an analysis report; the database module is connected to the simulation analysis module, and the simulation analysis module is responsible for simulating the filter circuit and generating a simulation report to verify its performance; if the simulation result does not meet the requirements, the parameter optimization module will automatically correct the parameters and re-simulate; the simulation analysis module is connected to the filter manufacturing and testing module, and the filter manufacturing and testing module manufactures the filter according to the optimized parameters and tests it to ensure that its performance meets the standard. It also includes an expert library module, which is connected to the filter manufacturing and testing module, and the expert library module is used to store and call expert design solutions to provide intelligent support for design optimization. The database module includes a filter circuit parameter database and a filter component database, and the electromagnetic compatibility analysis module is respectively connected to the filter circuit parameter database and the filter component database, and the filter circuit parameter database and the filter component database are both connected to the simulation analysis module. The system realizes efficient, accurate and intelligent filter design through modular collaboration.

[0033] A method for implementing a power supply filter circuit expert system comprises the following steps:

[0034] The system first receives and enters the conducted emission data of the equipment, which usually comes from the previous test links or the performance parameters of the equipment, including the noise level in power transmission, the emission frequency range, the interference intensity and other information. These data provide a basic reference for subsequent electromagnetic compatibility analysis. In addition, the system also needs to enter the technical requirements of the filter, including the specific filtering frequency band, safety parameters and the physical size limit of the filter. At the same time, the system supports the selection of corresponding conducted emission limits according to the standards of different countries or regions (such as CISPR, GJB or GB / T) to ensure that the final designed filter complies with international and regional electromagnetic compatibility specifications. Users can also customize technical parameters for specific application scenarios (such as medical equipment, communication equipment, industrial control systems, etc.) to meet the special needs of different fields.

[0035] After obtaining the input data, the system verifies the input data and prompts the user to select the corresponding standard or limit. The system immediately starts to carry out preliminary analysis, and conducts a comprehensive comparative analysis of the conducted emission data of the equipment with the preset standards. The system analyzes the noise and interference in different frequency bands through spectrum analysis, and identifies the frequency bands and potential interference sources with excessive emissions, such as power supply noise or high-frequency signal interference. In this process, the system generates detailed visual charts, including spectrum charts, bar charts, and interference intensity curves, to help users intuitively understand the electromagnetic compatibility performance of the equipment. After the analysis is completed, the system will generate a preliminary analysis report, which covers the evaluation of the rationality of the input parameters, such as whether the data volume is correct, whether the input parameters are logically reasonable, items exceeding the standard, possible interference causes, and preliminary filtering suggestions.

[0036] After completing the electromagnetic compatibility analysis of the input data, the system automatically calls the filter circuit parameter database and the filter component database to generate a filtering solution for the current device. The parameter database stores a variety of typical circuit parameter combinations, such as inductance, capacitance and impedance values ​​in different frequency bands, while the component database covers the specification information of various filter components, including physical dimensions, materials, electrical characteristics and supply chain data. According to the specific needs and analysis results of the equipment, the system matches the optimal parameter combination from the database and automatically generates multiple simulation models. These models may include high-pass, low-pass, band-pass or band-stop filters, and even combine multi-stage filtering solutions to deal with complex interference situations. At the same time, the system also provides the most cost-effective design solution based on the price and performance balance of the components to ensure that the performance requirements of the equipment are met while controlling costs. Users can select the optimal design from multiple solutions and fine-tune the parameters to prepare for the next simulation.

[0037] In the simulation analysis phase, the system fully simulates the performance of the filter circuit model to evaluate its emission suppression effect and power transfer characteristics under different working conditions. The simulation report will show whether the amplitude value of the filter's amplitude-frequency curve is lower than the standard threshold value of the relevant standard. If the simulation results show that the current design does not meet the requirements, the system will automatically enter the optimization phase and start the parameter optimization module. Based on the simulation results, the system may recommend adjusting the parameters of the inductor and capacitor to optimize the filtering effect, or reselect more suitable component specifications from the component database. The system may also recommend changing the structural design of the filter, such as adding multi-stage filtering or adjusting the layout of series and parallel circuits to better cope with interference in specific frequency bands. The optimized parameters will be applied to the simulation model again and re-simulated and verified. This process will be iterated repeatedly until the simulation results show that the design fully meets the conducted emission limit and meets other technical requirements of the filter. After the design passes the simulation verification, the system generates a production instruction and enters the filter production and testing phase to ensure that the performance of the final product meets the standard requirements.

[0038] When the filtering scheme has gone through multiple rounds of verification and the verification results meet the electromagnetic compatibility requirements, the system will generate detailed production instructions and enter the filter production stage. In this stage, the system guides the engineering team to select components that meet the specifications based on the optimized circuit parameters, and build the filtering circuit according to the design plan. During the production process, the system monitors each key step to ensure that the installation, connection and parameter setting of the components fully meet the design requirements of the simulation model. After the filter is assembled, it will be sent to the test stage for conducted emission testing to verify its electromagnetic compatibility performance under actual working conditions.

[0039] During the testing phase, the system uses professional testing equipment to test the insertion loss and electrical performance of the filter in each frequency band, and compares and analyzes the test data with the simulation results. If the test results show that the conducted emission performance of the filter meets the requirements, the design is considered successful, and the system will store the design scheme together with detailed information such as test data and optimization process records in the expert library. These archived data can not only provide reference and support for future designs, but also provide intelligent recommendation schemes for filter designs in similar application scenarios, improving the self-learning ability of the system. If the future design requirements are similar to this scheme, the system will automatically call the design in the expert library and further optimize it according to the new requirements.

[0040] If the test results deviate from the simulation results or exceed the standard limits, the system will start the feedback mechanism to analyze the possible causes of the error. The system may prompt to re-test the parameter consistency of the components, check the integrity of the circuit connection, or add more realistic conditions to the simulation model to narrow the gap between the simulation and the actual test. Once the adjustment is completed, the filter is retested and the design is archived after verification. Through this closed-loop feedback mechanism, the system can not only make the equipment achieve the ideal electromagnetic compatibility characteristics as much as possible, but also continue to accumulate optimization experience and gradually improve the accuracy and efficiency of future designs.

[0041] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A power filter circuit expert system, characterized in that: It includes a data input module, an electromagnetic compatibility analysis module, a database module, a simulation analysis module, and a filter manufacturing and testing module. The data input module is connected to the electromagnetic compatibility analysis module, and the data input module is used to obtain the conducted emission data of the equipment and the technical requirements of the filter; the electromagnetic compatibility analysis module is connected to the database module, and the electromagnetic compatibility analysis module analyzes the input data and generates an analysis report; the database module is connected to the simulation analysis module, and the simulation analysis module is responsible for simulating the filter circuit and generating a simulation report to verify its performance; if the simulation result does not meet the requirements, the parameter optimization module will automatically correct the parameters and re-simulate; the simulation analysis module is connected to the filter manufacturing and testing module, and the filter manufacturing and testing module manufactures the filter according to the optimized parameters and tests it to ensure that its performance meets the standards.

2. A power supply filter circuit expert system according to claim 1, characterized in that: It also includes an expert library module, which is connected to the filter production and testing module and is used to store and call expert design solutions to provide intelligent support for design optimization.

3. The power filter circuit expert system according to claim 1, characterized in that: The database module includes a filter circuit parameter database and a filter element database. The electromagnetic compatibility analysis module is connected to the filter circuit parameter database and the filter element database respectively. The filter circuit parameter database and the filter element database are both connected to the simulation analysis module.

4. A method for implementing a power supply filter circuit expert system according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. The system first receives and records the conducted emission data of the equipment. These data usually come from the previous test links or the performance parameters of the equipment, including the noise level in power transmission, the transmission frequency range, the interference intensity and other information; these data provide a basic reference for the subsequent electromagnetic spectrum characteristics analysis; in addition, the system also needs to record the technical requirements of the filter, including the specific filtering frequency band, insertion loss, voltage drop, insulation resistance, withstand voltage, leakage current, environmental adaptability requirements and the physical size limit of the filter. The filtering frequency band includes low pass, high pass, band pass and band stop; at the same time, the system supports the selection of corresponding conducted emission limits according to the standards of different countries or regions to ensure that the final designed filter meets the international and regional electromagnetic compatibility specifications; users can also customize technical parameters for specific application scenarios to meet the special needs of different fields; S2. After obtaining the input data, the system first conducts a comprehensive analysis of the conducted emission data of the device through the built-in electromagnetic compatibility analysis module; the module compares the emission data of the device with the selected emission limit standard, identifies the frequency band where the emission exceeds the standard and the possible cause of interference; at the same time, the system calls the filter circuit parameter database and the filter component database to preliminarily give filter design suggestions or improvement directions; during the analysis process, the system generates visual charts, including spectrum charts, emission intensity bar charts and interference distribution charts, to help users intuitively analyze emission problems; S3. The preliminary analysis report will list in detail the detected critical frequency bands exceeding the standard, possible interference causes and recommended filtering methods; S4. After completing the data input and preliminary analysis, the system immediately starts the electromagnetic compatibility analysis module to conduct a comprehensive comparative analysis of the equipment's conducted emission data with the preset standards; S5. After completing the electromagnetic compatibility analysis of the input data, the system automatically calls the filter circuit parameter database and the filter component database to generate a filtering solution for the current device; the parameter database stores a variety of typical circuit parameter combinations, such as inductance, capacitance and impedance values ​​in different frequency bands, while the component database covers the specification information of various filter components, including physical dimensions, materials, electrical characteristics and supply chain data; the system matches the optimal parameter combination from the database according to the specific needs and analysis results of the device, and automatically generates multiple simulation models; S6. In the simulation analysis stage, the system comprehensively simulates the performance of the filter circuit model and evaluates its emission suppression effect and power transmission characteristics under different working conditions. The simulation report will show whether the amplitude value of the filter's amplitude-frequency curve is lower than the standard threshold value of the relevant standard. If the simulation results show that the current design does not meet the requirements, the system will automatically enter the optimization stage and start the parameter optimization module. Based on the simulation results, the system may recommend adjusting the parameters of the inductor and capacitor to optimize the filtering effect, or reselect more suitable component specifications from the component database. The system also recommends changing the structural design of the filter, including adding multi-stage filtering or adjusting the layout of series and parallel circuits to better cope with interference in specific frequency bands. The optimized parameters will be applied to the simulation model again and re-simulated and verified. The process will be iterated repeatedly until the simulation results show that the design is completely below the conducted emission limit and meets other technical requirements of the filter. After the design passes the simulation verification, the system generates a production instruction and enters the filter production and testing stage to ensure that the performance of the final product meets the standard requirements. S7. When the simulation scheme has been verified for multiple rounds and the verification results meet the conducted emission requirements and the technical requirements of the filter, the system will generate detailed production instructions and enter the filter production stage; S8, During the testing phase, the system uses professional testing equipment to test the insertion loss and electrical performance of the filter in each frequency band, and compares and analyzes the test data with the simulation results; S9. If the test results deviate from the simulation results or exceed the standard limit, the system will activate the feedback mechanism to analyze the cause of the error.

5. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The preliminary analysis report in S3 also includes a rationality evaluation of the input parameters, which includes whether the amount of data is correct and whether the input parameters are logically reasonable. In addition, the system will prompt whether further simulation or parameter adjustment is needed to ensure the effectiveness of the filtering solution and provide optimization suggestions.

6. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The system in S4 analyzes the noise and interference in different frequency bands through spectrum analysis, and identifies the frequency bands with excessive emissions and potential interference sources, such as power supply noise or high-frequency signal interference; in this process, the system generates detailed visual charts, including spectrum charts, bar charts, and interference intensity curves, to help users intuitively understand the electromagnetic spectrum characteristics of the device; after the analysis is completed, the system will generate a preliminary analysis report, which covers the emission performance of key frequency bands, excessive items, possible interference causes, and preliminary filtering suggestions, such as using low-pass filters or band-stop filters to eliminate interference in specific frequency bands; if the amplitude value of the device's amplitude-frequency curve is lower than but close to the standard limit, the system will also give further optimization suggestions, prompting the user whether simulation analysis is needed.

7. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The multiple simulation models in S5 include high-pass, low-pass, band-pass or band-stop filters, and even combine multi-stage filtering solutions to deal with complex interference situations; at the same time, the system also provides the most cost-effective design solution based on the price and performance balance of the components to ensure that the performance requirements of the equipment are met while controlling costs; users can choose the optimal design from multiple solutions and fine-tune the parameters to prepare for the next simulation.

8. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The production phase of the filter in S7 is as follows: the system guides the engineering team to select components that meet the specifications based on the optimized circuit parameters, and builds the filter circuit according to the design plan; during the production process, the system monitors each key step to ensure that the installation, connection and parameter setting of the components fully meet the design requirements of the simulation model; after the filter is assembled, it will be sent to the test phase for conducted emission detection to verify its electromagnetic compatibility characteristics under actual working conditions.

9. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The method for comparing and analyzing the test data with the simulation results in S8 is: if the test results show that the filtering performance and electrical performance of the filter meet the requirements, the design is deemed to be successful, and the system will store the design scheme together with detailed information such as test data and optimization process records in the expert library; these archived data can not only provide reference and support for future designs, but also provide intelligent recommendation schemes for filter designs in similar application scenarios, thereby improving the self-learning ability of the system; if future design requirements are similar to this scheme, the system will automatically call the design in the expert library and further optimize it according to the new requirements.

10. The method for implementing a power supply filter circuit expert system according to claim 4, characterized in that: The method for analyzing the cause of the error in S9 is: the system will prompt to re-check the parameter consistency of the component, check the integrity of the circuit connection, or add more realistic boundary conditions in the simulation model to narrow the gap between the simulation and the actual test; Once the adjustment is completed, the system will retest the filter and archive the design after verification; through this closed-loop feedback mechanism, the system can not only make the equipment achieve the ideal electromagnetic compatibility characteristics as much as possible, but also continuously accumulate optimization experience and gradually improve the accuracy and efficiency of future designs.

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