Switching power supply output quality grade evaluation method, system, equipment and medium

Abstract

The invention discloses a switching power supply output quality grade evaluation method, system and device and a medium, and relates to the technical field of switching power supplies. Comprising the following steps: obtaining evaluation index data and expert opinions of an evaluation object, and obtaining an evaluation index comprehensive weight of subjective and objective fusion weighting by adopting a CRITIC method and an analytic hierarchy process; according to the evaluation index weight of subjective and objective fusion weighting, an improved TOPSIS method is adopted to calculate the relative distance of the evaluation object; and realizing switching power supply output quality grade evaluation according to the relative distance between the grade and the sample. According to the evaluation index data and expert suggestions, an improved TOPSIS method is adopted, subjective weighting and objective weighting are combined, the evaluation index weight of the output quality of the switching power supply is obtained, the output quality of the switching power supply can be accurately evaluated, and the problem that the output quality of the switching power supply cannot be comprehensively, accurately and reliably evaluated in the prior art is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of switching power supplies, and particularly relates to a method, system, device and medium for evaluating the output quality level of a switching power supply. Background Art

[0002] In the current rapidly developing field of electronic technology, as a key power conversion device, the performance of a switching power supply directly affects the stability and reliability of an electronic system. A switching power supply is the power source for electronic devices in advanced high-tech fields and is known as the heart of electronic devices. It provides power to ensure the quality and reliability of electronic devices. The power supply industry in the electronics manufacturing industry cannot be ignored. Benefiting from new technologies, switching power supplies are developing rapidly.

[0003] The development of modern power electronics mainly consists of switching power supplies and linear power supplies. Among them, switching power supplies have almost swept the electronics industry with the advantages of low power loss, small size, light weight and high working efficiency. The requirements of electronic devices for power supplies are getting higher and higher. While switching power supplies meet the advantages of volume, weight, efficiency, power consumption, etc., the reliability of switching power supplies has become increasingly important. With the increasing requirements of electronic devices for power quality, how to accurately evaluate the output quality of a switching power supply has become an urgent problem to be solved.

[0004] However, the current evaluation technology for the output quality of switching power supplies is not yet mature, and there are still gaps in some aspects, with several significant defects: First, existing evaluation methods often rely too much on a single index and lack a comprehensive consideration of multi-dimensional performance. How to use existing technologies to comprehensively and accurately judge and evaluate the various aspects and the output quality level of a switching power supply from multiple angles has become a difficult problem. Second, existing evaluations are mostly proposed by some relevant professionals and are only applicable to some specific situations. The evaluation process is highly subjective and lacks objectivity. These all limit the comprehensiveness, accuracy and reliability of the evaluation results. At the same time, some switches on the market currently have a limited scope of use, varying degrees of difficulty in use, relatively single functions, and high cost prices, and these problems will directly affect the final economic benefits. How to guide the technological upgrading and transformation of switching power supplies and promote the healthy and sustainable development of the switching power supply industry is also a huge challenge for today's society. Summary of the Invention

[0005] Aiming at the deficiencies of the above technologies, the purpose of the present invention is to provide a method, system, device and medium for evaluating the quality level of a switching power supply. This evaluation method adopts a combination of subjective and objective weighting methods, which uses the CRITIC method to obtain the objective weight and the Analytic Hierarchy Process to obtain the subjective weight, aiming to construct a more comprehensive and objective evaluation system for the output quality level of the switching power supply, so as to solve the limitations of the existing evaluation methods and fill the gap in the comprehensive evaluation technology of the switching power supply output quality. Through this method, we can not only more accurately identify and solve the problems that the switching power supply may encounter in actual applications, but also provide a scientific basis for the design and optimization of the switching power supply, thereby promoting the technological progress of the entire electronic power industry.

[0006] To achieve the above purpose, the technical solutions adopted by the present invention are as follows:

[0007] In the first aspect of the present invention, a method for evaluating the output quality level of a switching power supply is provided, including the following steps:

[0008] Step 1: Obtain the evaluation index data and expert opinions of the evaluation object;

[0009] Step 2: Construct an evaluation matrix based on the evaluation index data of the evaluation object, and use the CRITIC method to calculate the objective weight of the evaluation index;

[0010] Step 3: Construct a multi-expert comprehensive evaluation matrix based on the scoring opinions of multiple experts, and use the Analytic Hierarchy Process to calculate the subjective weight of the evaluation index;

[0011] Step 4: Use an appropriate fusion method to fuse the objective weight of the evaluation index obtained by the objective weight acquisition module M2 and the subjective weight of the evaluation index obtained by the subjective weight acquisition module M3 to obtain the comprehensive weight of the evaluation index;

[0012] Step 5: Adopt the improved TOPSIS method to conduct a comprehensive evaluation of the output quality of the switching power supply.

[0013] Further, the evaluation object described in step 1 includes the evaluation index level, the switching power supply operating state limit value, and k switching power supply samples.

[0014] Further, the evaluation indexes described in step 1 include load stability, voltage stability, ripple and noise, hold-up time, input switch-on and off, and audible noise.

[0015] Further, the expert opinions described in step 1 use the 1-9 scale method to score each evaluation index, and the scores of multiple experts need to be averaged.

[0016] Further, the method for calculating the objective weight of the evaluation index by the CRITIC method described in step 2 is as follows:

[0017]

[0018] In the formula, is the objective weight of the j-th evaluation index; S j is the comparison intensity of the j-th index; C j is the conflict of the j-th index; the objective weights of all evaluation indexes constitute the objective weight index vector

[0019] Furthermore, the method for calculating the subjective weight vector of the evaluation index in step 3 by the analytic hierarchy process is as follows:

[0020]

[0021] In the formula, is the subjective weight vector of the evaluation index, is the subjective weight of the j-th evaluation index; A is the comprehensive judgment matrix of multiple experts; λ is the eigenvalue of matrix A.

[0022] Furthermore, the fusion method described in step 4 includes but is not limited to weighted synthesis method, geometric synthesis method, multiplication synthesis method, range maximization, and matrix thought.

[0023] Furthermore, the improved TOPSIS method described in step 5 is reflected in using the relative distance of the evaluation object instead of the relative closeness of the evaluation object.

[0024] Furthermore, the key steps for comprehensively evaluating the output quality of the switching power supply by the improved TOPSIS method described in step 5 include:

[0025] Calculating the relative distance according to the improved TOPSIS method:

[0026]

[0027] In the formula, is the Euclidean distance between the index value of the j-th evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the j-th evaluation object and the negative ideal solution; is the reference point of the positive ideal solution;

[0028] Obtaining the quantization result of the output quality level of the switching power supply according to the relative distance. The output quality level of the switching power supply is divided into: level 1, level 2, and level 3, where level 1 is the best;

[0029] Comparing the relative distance of the output quality level of the switching power supply with the relative distance of the switching power supply sample to obtain the output quality level of the switching power supply sample.

[0030] In the second aspect of the present invention, a switching power supply quality level evaluation system is provided, including:

[0031] Data acquisition module M1: Obtain the evaluation index data and expert opinions of the evaluation object;

[0032] Objective weight acquisition module M2: Construct an evaluation matrix based on the evaluation index data of the evaluation object, and use the CRITIC method to calculate the objective weights of the evaluation indexes;

[0033] Subjective weight acquisition module M3: Construct a comprehensive multi-expert evaluation matrix according to the scoring opinions of multiple experts, and use the analytic hierarchy process to calculate the subjective weights of the evaluation indexes;

[0034] Comprehensive weight acquisition module M4: Use an appropriate fusion method to fuse the objective weights of the evaluation indexes obtained by the objective weight acquisition module M2 and the subjective weights of the evaluation indexes obtained by the subjective weight acquisition module M3 to obtain the comprehensive weights of the evaluation indexes;

[0035] Comprehensive evaluation module M5: Use the improved TOPSIS method to comprehensively evaluate the output quality of the switching power supply.

[0036] Further, the evaluation object of the data acquisition module M1 includes the evaluation index levels, the specified values of the switching power supply operating state, and k switching power supply samples.

[0037] Further, the evaluation indexes of the data acquisition module M1 include load stability, voltage stability, ripple and noise, hold-up time, input switch-on and off, and audible noise.

[0038] Further, the expert opinions of the data acquisition module M1 use the 1-9 scale method to score each evaluation index, and the scores of multiple experts need to be averaged.

[0039] Further, the method for calculating the objective weights of the evaluation indexes by the CRITIC method in the objective weight acquisition module M2 is as follows:

[0040]

[0041] In the formula, is the objective weight of the jth evaluation index; S j is the contrast intensity of the jth index; C j is the conflict of the jth index; the objective weights of all evaluation indexes constitute the objective weight index vector

[0042] Further, the method for calculating the subjective weight vector of the evaluation indexes by the analytic hierarchy process in the subjective weight acquisition module M3 is as follows:

[0043] AW j subj =λW j subj

[0044] In the formula, is the subjective weight vector of the evaluation index, is the subjective weight of the j-th evaluation index; A is the comprehensive judgment matrix of multiple experts; λ is the eigenvalue of matrix A.

[0045] Furthermore, the fusion method described in the comprehensive weight acquisition module M4 includes, but is not limited to, weighted synthesis method, geometric synthesis method, multiplication synthesis method, range maximization, and matrix idea.

[0046] Furthermore, the improved TOPSIS method described in step 5 is reflected in that the relative distance of the evaluation object is used instead of the relative closeness degree of the evaluation object.

[0047] Furthermore, the key steps for the improved TOPSIS method described in the comprehensive evaluation module M5 to comprehensively evaluate the output quality of the switching power supply include:

[0048] Calculating the relative distance according to the improved TOPSIS method:

[0049]

[0050] In the formula, is the Euclidean distance between the index value of the j-th evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the j-th evaluation object and the negative ideal solution; is the positive ideal solution reference point;

[0051] Obtaining the quantization result of the output quality level of the switching power supply according to the relative distance. The output quality level of the switching power supply is divided into: level 1, level 2, and level 3, where level 1 is the best;

[0052] Comparing the relative distance of the output quality level of the switching power supply with the relative distance of the switching power supply sample to obtain the output quality level of the switching power supply sample.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] 1. In the present invention, through parameter indicators such as load stability, voltage stability, ripple and noise, hold-up time, input switching on and off, and audible noise, the output quality level of the switching power supply can be comprehensively displayed and identified, directly reflecting the discrimination of the technical levels of different dimensions of the switching power supply product.

[0055] 2. In the present invention, according to the test parameter indicators of the switching power supply, the CRITIC method and the analytic hierarchy process are adopted, combined with subjective weighting and objective weighting, to obtain the subjective and objective fusion weighted evaluation index weights of the output quality of the switching power supply, which can accurately evaluate the output quality level of the switching power supply.

[0056] 3. The present invention uses an improved TOPSIS method to comprehensively evaluate the output quality of a switching power supply, improving the defect of the relative closeness degree of the TOPSIS method, so that the comprehensive evaluation algorithm has higher applicability.

[0057] 4. The evaluation method provided by the present invention has the characteristics of high efficiency, simplicity, low cost, wide application range, etc. It comprehensively and objectively analyzes the comprehensive performance of the switching power supply. The present invention fills the blank of the detection and evaluation technology for the output quality of the switching power supply, will guide the technological upgrading and transformation of the switching power supply technology, and promote the healthy and sustainable development of the switching power supply industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a flowchart of the method for evaluating the output quality level of the switching power supply of the present invention.

[0059] Figure 2 It is a structural block diagram of the system for evaluating the output quality level of the switching power supply of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0060] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0061] Refer to Figure 1 , an embodiment of the present invention provides a method for evaluating the output quality level of a switching power supply, including the following steps:

[0062] (1) Obtain the objective weight of the evaluation index based on the CRITIC method

[0063] The present invention conducts tests on different switching power supplies through standards or technical specification methods stipulated by institutions such as the state, industry, and associations, and obtains the test data of the evaluation index.

[0064] Specifically, the evaluation indexes include load stability, voltage stability, ripple and noise, hold-up time, input switching on and off, and audible noise.

[0065] The load stability level is shown in Table 1, and the calculation formula for load stability is:

[0066]

[0067] In the formula, S i is the load stability; U O is the output voltage after stabilization during rated operation; U XThe output voltage after stabilization when the input voltage is the rated voltage and the load current is adjusted from the rated load current to 50% of the rated load; the load is in constant voltage or constant current mode.

[0068] Table 1 Load Stability Grade

[0069]

[0070] Refer to Table 2 for the voltage stability grade. The calculation formula for voltage stability is:

[0071]

[0072] In the formula, S v is the voltage stability; U O is the output voltage after stabilization under rated operation; U X is the output voltage after stabilization when the input voltage is adjusted to ±10% of the rated input voltage.

[0073] Table 2 Voltage Stability Grade

[0074]

[0075] Refer to Table 3 for the ripple and noise grade. The test index data of ripple and noise refer to: with the rated input voltage, adjust the load current to the minimum load, 50% of the rated load, and the rated load, and use an oscilloscope to observe the peak-to-peak value of the AC component superimposed on the output voltage respectively. Take the maximum observed value as the value of ripple and noise.

[0076] Table 3 Ripple and Noise Grade

[0077]

[0078] Refer to Table 4 for the hold-up time grade. The test index data of hold-up time refer to: under rated operating conditions, cut off the AC input voltage at the 0° phase, and use an oscilloscope to measure the time interval from cutting off the AC input voltage to the DC output voltage dropping to 95% of the rated value.

[0079] Table 4 Hold-up Time Grade

[0080]

[0081] Refer to Table 5 for the input power on / off grade. The test index data of input power on / off refer to: the number of switchings when the input voltage is 10% of the rated voltage and the load current is the rated load, and the power on / off time interval is not less than 5s.

[0082] Table 5 Input Power On / Off Grade

[0083]

[0084] The audible noise test index data refers to the noise value measured by setting the switching power supply in the working state in a semi-anechoic chamber, which can be divided into two types: with a cooling fan and without a cooling fan. For the noise level of the switching power supply with a cooling fan, refer to Table 6; for the air noise of the switching power supply without a cooling fan, refer to Table 7.

[0085] Table 6 Noise Level of Switching Power Supply with Cooling Fan

[0086]

[0087] Table 7 Air Noise Level of Switching Power Supply without Cooling Fan

[0088]

[0089] The evaluation objects include the evaluation index levels, the limit values of the switching power supply working state, and k switching power supply samples. The corresponding relationship between the evaluation objects and the evaluation indexes is shown in Table 8. According to Table 8, construct the evaluation matrix X=(x ij ) m×n , where: i is the evaluation object, i = 1, 2, …, m (m = k + 5); j is the evaluation index, j = 1, 2, …, n (n = 6).

[0090] Table 8 Corresponding Relationship between Switching Power Supply Evaluation Objects and Evaluation Indexes

[0091]

[0092]

[0093] Calculate the objective weights of the evaluation indexes according to the CRITIC method:

[0094]

[0095] In the formula, is the objective weight of the jth evaluation index; S j is the contrast intensity of the jth index; C j is the conflict of the jth index; the objective weights of all evaluation indexes constitute the objective weight index vector

[0096] (2) Obtain the subjective weights of the evaluation indexes based on the analytic hierarchy process

[0097] Construct a multi-expert comprehensive judgment matrix according to the scoring of each evaluation index by multiple experts using the 1-9 scale method. In order to reduce the deviation of expert scoring, it is necessary to average the scores of each evaluation index to obtain an average multi-expert comprehensive evaluation matrix.

[0098] Calculate the subjective weight vector according to the average multi-expert comprehensive judgment matrix:

[0099]

[0100] Wherein, is the subjective weight vector of the evaluation index, is the subjective weight of the j-th evaluation index; A is the comprehensive judgment matrix of multiple experts; λ is the eigenvalue of matrix A.

[0101] (3) Obtain the comprehensive weight of the evaluation index

[0102] In this embodiment, the weighted synthesis method is used to obtain the comprehensive weight:

[0103]

[0104] Wherein, is the comprehensive weight of the j-th evaluation index.

[0105] (4) Conduct comprehensive level evaluation based on the improved TOPSIS method

[0106] Calculate the relative distance according to the improved TOPSIS method:

[0107]

[0108] Wherein, is the Euclidean distance between the index value of the j-th evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the j-th evaluation object and the negative ideal solution; is the reference point of the positive ideal solution.

[0109] The output result can be obtained according to the relative distance, as shown in Table 9.

[0110] Table 9 Relative distances of evaluation objects

[0111] Evaluation object Relative distance d Boundary values for levels 1 and 2 <![CDATA[d 1 > Boundary values for levels 2 and 3 <![CDATA[d 2 > Sample 1 <![CDATA[d 3 > Sample 2 <![CDATA[d 4 > …… …… Sample k <![CDATA[d k+2 >

[0112] Therefore, the quantization result of the output quality level of the switching power supply can be obtained, as shown in Table 10. The output quality level of the switching power supply is divided into: Level 1, Level 2, and Level 3, where Level 1 is the best.

[0113] Table 10 Output quality level of the switching power supply

[0114]

[0115] The output quality level of the switching power supply sample can be obtained by comparing the relative distance between the switching power supply sample and the output quality level of the switching power supply.

[0116] See Figure 2 , in an embodiment of the present invention, a switching power supply output quality level evaluation system is provided, including:

[0117] Data acquisition module M1: Obtain the evaluation index data and expert opinions of the evaluation object;

[0118] Objective weight acquisition module M2: Construct an evaluation matrix based on the evaluation index data of the evaluation object, and use the CRITIC method to calculate the objective weights of the evaluation indexes;

[0119] Subjective weight acquisition module M3: Construct a comprehensive multi-expert judgment matrix based on the scoring opinions of multiple experts, and use the analytic hierarchy process to calculate the subjective weights of the evaluation indexes;

[0120] Comprehensive weight acquisition module M4: Use an appropriate fusion method to fuse the objective weights of the evaluation indexes obtained by the objective weight acquisition module M2 and the subjective weights of the evaluation indexes obtained by the subjective weight acquisition module M3 to obtain the comprehensive weights of the evaluation indexes;

[0121] Comprehensive evaluation module M5: Use the improved TOPSIS method to comprehensively evaluate the output quality of the switching power supply.

[0122] Further, the evaluation object of the data acquisition module M1 includes the evaluation index level, the limit value of the switching power supply working state, and k switching power supply samples.

[0123] Further, the evaluation indexes of the data acquisition module M1 include load stability, voltage stability, ripple and noise, hold-up time, input switch-on and off, and audible noise.

[0124] Further, the expert opinions of the data acquisition module M1 use the 1-9 scale method to score each evaluation index, and the scores of multiple experts need to be averaged.

[0125] Further, the method for calculating the objective weights of the evaluation indexes by the CRITIC method of the objective weight acquisition module M2 is as follows:

[0126]

[0127] In the formula, is the objective weight of the j-th evaluation index; S j is the contrast intensity of the j-th index; C j is the conflict of the j-th index; the objective weights of all evaluation indexes constitute the objective weight index vector

[0128] Further, the method for calculating the subjective weight vector of the evaluation indexes by the analytic hierarchy process of the subjective weight acquisition module M3:

[0129]

[0130] In the formula, The subjective weight vector of the evaluation index is the subjective weight of the j-th evaluation index; A is the comprehensive judgment matrix of multiple experts; λ is the eigenvalue of matrix A.

[0131] Furthermore, for the fusion method described in the comprehensive weight acquisition module M4, this embodiment uses the weighted synthesis method to obtain the comprehensive weight:

[0132]

[0133] In the formula, is the comprehensive weight of the j-th evaluation index.

[0134] Furthermore, the key steps for the comprehensive evaluation module M5 to comprehensively evaluate the output quality of the switching power supply using the improved TOPSIS method include:

[0135] Calculate the relative distance according to the improved TOPSIS method:

[0136]

[0137] In the formula, is the Euclidean distance between the index value of the j-th evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the j-th evaluation object and the negative ideal solution; is the reference point of the positive ideal solution;

[0138] Obtain the quantization result of the output quality level of the switching power supply according to the relative distance. The output quality level of the switching power supply is divided into: Level 1, Level 2, and Level 3, where Level 1 is the best;

[0139] Compare the relative distance of the output quality level of the switching power supply with the relative distance of the switching power supply sample to obtain the output quality level of the switching power supply sample.

[0140] It should be noted that those skilled in the art should understand that the embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0141] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate means for implementing the functions specified in one or more flows and / or blocks Figure 1 in one or more flows and / or blocks Figure 1 in one or more blocks.

[0142] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means for implementing the functions specified in one or more flows and / or blocks Figure 1 in one or more flows and / or blocks Figure 1 in one or more blocks.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows and / or blocks Figure 1 in one or more flows and / or blocks Figure 1 in one or more blocks.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A method for evaluating the output quality level of a switching power supply, characterized in that: The following steps are involved: Step 1: Obtain the evaluation index data and expert opinions of the evaluation object; Step 2: Construct an evaluation matrix based on the evaluation index data of the evaluation object, and use the CRITIC method to calculate the objective weight of the evaluation index; Step 3: Construct a multi-expert comprehensive evaluation matrix based on the scoring opinions of multiple experts, and use the hierarchical analysis method to calculate the subjective weights of the evaluation indicators; Step 4: Use an appropriate fusion method to fuse the objective weight of the evaluation index obtained by the objective weight acquisition module M2 and the subjective weight of the evaluation index obtained by the subjective weight acquisition module M3 to obtain the comprehensive weight of the evaluation index; Step 5: Use the improved TOPSIS method to comprehensively evaluate the output quality of the switching power supply.

2. The method for evaluating the output quality level of a switching power supply according to claim 1, characterized in that: include: The evaluation objects include evaluation index levels, switch power supply working state limit values ​​and k switch power supply samples; Evaluation indicators include load stability, voltage stability, ripple and noise, hold time, input on / off, and audible noise; Expert opinions use a 1-9 scale to score each evaluation indicator, and the scores of multiple experts need to be averaged.

3. The method for evaluating the output quality level of a switching power supply according to claim 1, characterized in that: include: The objective weights of evaluation indicators are calculated using the CRITIC method; The analytic hierarchy process is used to calculate the subjective weights of the evaluation indicators.

4. The method for evaluating the output quality level of a switching power supply according to claim 1, characterized in that: Fusion methods include but are not limited to weighted synthesis, geometric synthesis, multiplication synthesis, range maximization, and matrix thinking.

5. The method for evaluating the output quality level of a switching power supply according to claim 1, characterized in that: The key steps of improving the TOPSIS method to comprehensively evaluate the output quality of the switching power supply include the following: The relative distance is calculated according to the improved TOPSIS method: In the formula, is the Euclidean distance between the index value of the jth evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the jth evaluation object and the negative ideal solution; is the positive ideal solution reference point; The quantification result of the switching power supply output quality grade is obtained according to the relative distance. The switching power supply output quality grade is divided into: grade 1, grade 2, and grade 3, among which grade 1 is the best. The relative distance of the output quality level of the switching power supply is compared with the relative distance of the switching power supply sample to obtain the output quality level of the switching power supply sample.

6. The switching power supply output quality rating system is characterized by: The following steps are involved: Data acquisition module M1: obtains evaluation index data and expert opinions of the evaluation object; Objective weight acquisition module M2: constructs an evaluation matrix based on the evaluation index data of the evaluation object, and uses the CRITIC method to calculate the objective weight of the evaluation index; Subjective weight acquisition module M3: construct a multi-expert comprehensive evaluation matrix based on the scoring opinions of multiple experts, and use hierarchical analysis method to calculate the subjective weight of the evaluation index; Comprehensive weight acquisition module M4: uses an appropriate fusion method to fuse the objective weight of the evaluation index obtained by the objective weight acquisition module M2 and the subjective weight of the evaluation index obtained by the subjective weight acquisition module M3 to obtain the comprehensive weight of the evaluation index; Comprehensive evaluation module M5: Use the improved TOPSIS method to comprehensively evaluate the output quality of the switching power supply.

7. The switching power supply output quality rating evaluation system according to claim 6, characterized in that: include: The evaluation objects include evaluation index levels, switch power supply working state limit values ​​and k switch power supply samples; Evaluation indicators include load stability, voltage stability, ripple and noise, hold time, input on / off, and audible noise; Expert opinions use a 1-9 scale to score each evaluation indicator, and the scores of multiple experts need to be averaged.

8. The switching power supply output quality rating evaluation system according to claim 6, characterized in that: include: The objective weights of evaluation indicators are calculated using the CRITIC method; The analytic hierarchy process is used to calculate the subjective weights of the evaluation indicators.

9. The switching power supply output quality rating evaluation system according to claim 6, characterized in that: Fusion methods include but are not limited to weighted synthesis, geometric synthesis, multiplication synthesis, range maximization, and matrix thinking.

10. The switching power supply output quality rating evaluation system according to claim 6, characterized in that: The key steps of improving the TOPSIS method to comprehensively evaluate the output quality of the switching power supply include the following: The relative distance is calculated according to the improved TOPSIS method: In the formula, is the Euclidean distance between the index value of the jth evaluation object and the positive ideal solution; is the Euclidean distance between the index value of the jth evaluation object and the negative ideal solution; is the positive ideal solution reference point; The quantification result of the switching power supply output quality grade is obtained according to the relative distance. The switching power supply output quality grade is divided into: grade 1, grade 2, and grade 3, among which grade 1 is the best. The relative distance of the output quality level of the switching power supply is compared with the relative distance of the switching power supply sample to obtain the output quality level of the switching power supply sample.

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