Propeller motor high rotation speed analogue simulation test system

Abstract

The invention relates to the technical field of propeller motor high-rotating-speed analogue simulation testing, and particularly discloses a propeller motor high-rotating-speed analogue simulation testing system. The system comprises a performance information acquisition module, a rated load state performance judgment module, a no-load state performance judgment module, a database, a limit rotation speed performance evaluation module and a limit state performance judgment module. According to the invention, propeller motor performance analysis is carried out from two loading conditions of a full-load state and a no-load state, the coverage of propeller motor performance evaluation is improved, the credibility of a propeller motor performance evaluation result is guaranteed, and the reliability of the propeller motor performance evaluation result is improved by comparing the performance difference under the simulation rotation speed and the limit rotation speed. By means of the method, the load capacity of the propeller motor can be accurately evaluated, potential performance bottlenecks can be found, meanwhile, it is ensured that the propeller motor can reliably operate under extreme conditions, potential fault hidden dangers can be found, and powerful support is provided for subsequent improvement and optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed simulation test of a propeller motor, and in particular to a high-speed simulation test system of a propeller motor. Background Art

[0002] With the rapid development of underwater vehicle technology, the performance requirements for propulsion motors are increasing, especially in terms of stability, efficiency and heat dissipation under high speed conditions. Traditional testing methods often rely on actual environmental testing, which is not only costly but also difficult to cover all extreme conditions. Therefore, it is particularly important to develop an efficient and accurate simulation test system.

[0003] Some existing technologies have proposed technical solutions for thruster motor simulation testing, but the following problems still generally exist: 1. The thruster motor performance test is not performed according to different load conditions, that is, the two load conditions of full load and no-load are not analyzed, resulting in insufficient coverage of the thruster motor performance evaluation, and thus the credibility of the thruster motor performance evaluation results cannot be guaranteed.

[0004] 2. The thruster motor performance was not tested under normal speed conditions and under extreme speed conditions. The performance difference between normal speed and extreme speed was not compared, so the load capacity of the thruster motor could not be accurately evaluated, potential performance bottlenecks could not be discovered, and it was impossible to ensure that the thruster motor could operate reliably under extreme conditions. Summary of the invention

[0005] In view of this, in order to solve the problems raised in the above background technology, a high-speed simulation test system for a propeller motor is now proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a high-speed simulation test system for a propeller motor, including: a performance information acquisition module, used to record the propeller motor of a target underwater vehicle as a target propeller motor, perform a simulation test on the target propeller motor in a target simulation software, and collect performance information of the target propeller motor at each simulation speed when it is in a rated load state.

[0007] The rated load state performance judgment module is used to analyze the performance evaluation index of the target thruster motor at each simulated speed in the rated load state, and judge whether the performance of the target thruster motor at the simulated speed in the rated load state meets the standard. If it does not meet the standard, feedback is given.

[0008] The no-load state performance judgment module is used to collect the performance information of the target thruster motor at each simulated speed when in the no-load state, and judge whether the performance of the target thruster motor at the corresponding simulated speed when in the no-load state meets the standard. If not, feedback is provided.

[0009] The database is used to store the standard thrust output curves corresponding to each simulation speed in the rated load state and the no-load state, and to store the standard working efficiency corresponding to each simulation speed in the rated load state and the no-load state.

[0010] The limit speed performance evaluation module is used to extract the limit speed of the target thruster motor, collect the performance information of the target thruster motor at the limit speed in the rated load state and the no-load state respectively, and evaluate the performance evaluation index of the target thruster motor at the limit speed in the rated load state and the no-load state respectively.

[0011] The limit state performance judgment module is used to judge whether the limit state performance of the target thruster motor meets the standard, and provide feedback if it does not meet the standard.

[0012] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: (1) The present invention improves the coverage of the propeller motor performance evaluation by analyzing the propeller motor performance under two load conditions: a full load state and an empty load state, thereby ensuring the credibility of the propeller motor performance evaluation results.

[0013] (2) The present invention achieves a comprehensive evaluation of the thruster motor performance by comprehensively analyzing the performance evaluation index of the target thruster motor from four aspects: thrust output smoothness, work efficiency qualification, vibration abnormality and heat dissipation performance stability. This comprehensive evaluation method helps to discover potential fault hazards and provide strong support for subsequent improvement and optimization.

[0014] (3) The present invention performs thruster motor performance tests under various simulated speed conditions and limit speed conditions. By comparing the performance differences under the simulated speed and the limit speed, the load capacity of the thruster motor can be accurately evaluated, helping to discover potential performance bottlenecks while ensuring that the thruster motor can operate reliably under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the system module structure connection of the present invention.

[0017] Figure 2 It is a schematic diagram of the thrust output curve of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, the present invention provides a propeller motor high speed simulation test system, including: a performance information acquisition module, a rated load state performance judgment module, a no-load state performance judgment module, a database, a limit speed performance evaluation module and a limit state performance judgment module.

[0020] The performance information acquisition module is connected to the rated load state performance judgment module, the no-load state performance judgment module and the limit speed performance evaluation module; the rated load state performance judgment module is connected to the no-load state performance judgment module, the limit speed performance evaluation module and the limit state performance judgment module; the rated load state performance judgment module is connected to the no-load state performance judgment module, the limit speed performance evaluation module is connected to the limit state performance judgment module, and both the rated load state performance judgment module and the no-load state performance judgment module are connected to the database.

[0021] The performance information collection module is used to record the propeller motor of the target underwater vehicle as the target propeller motor, perform simulation tests on the target propeller motor in the target simulation software, and collect performance information of the target propeller motor at each simulation speed when in the rated load state.

[0022] In a specific embodiment of the present invention, the performance information includes output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point.

[0023] It should be noted that the output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point are all extracted from the target simulation software.

[0024] In a specific embodiment of the present invention, the simulation rotation speed includes but is not limited to 2000 rpm, 2200 rpm, 2500 rpm and 2800 rpm, and the mentioned limit rotation speed is 3000 rpm.

[0025] The rated load state performance judgment module is used to analyze the performance evaluation index of the target thruster motor at each simulated speed when in the rated load state, and judge whether the performance of the target thruster motor at the simulated speed when in the rated load state meets the standard. If not, feedback is provided.

[0026] In a specific embodiment of the present invention, the specific process of analyzing the performance evaluation index of the target thruster motor at each simulated speed in the rated load state is as follows: A1, extracting the output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point from the performance information of the target thruster motor at each simulated speed in the rated load state, and calculating the thrust output stability of the target thruster motor at each simulated speed in the rated load state respectively based on the performance information. , Work efficiency qualification , Vibration Abnormal Index and heat dissipation stability ,in, The number indicating the simulation speed. .

[0027] See also Figure 2 As shown, in a specific embodiment of the present invention, the specific process of calculating the thrust output smoothness of the target thruster motor at each simulation speed in the rated load state is as follows: B1, taking the monitoring time point as the horizontal coordinate and the output thrust as the vertical coordinate, constructing the thrust output curve of the target thruster motor at each simulation speed in the rated load state, and overlapping and comparing the thrust output curve with the standard thrust output curve at each simulation speed in the rated load state stored in the database, obtaining the overlapping length of the thrust output curve of the target thruster motor at each simulation speed in the rated load state, and recording it as .

[0028] B2. Calculate the thrust output stability of the target thruster motor at each simulated speed under rated load , ,in, Indicates the overlap length of the thrust output curve for setting reference. Represents a natural constant.

[0029] In a specific embodiment of the present invention, the specific process of calculating the working efficiency qualification of the target propeller motor at each simulated speed in the rated load state is as follows: C1, the output power and input power of the target propeller motor at each simulated speed in the rated load state are recorded as and .

[0030] C2. Calculate the working efficiency of the target thruster motor at each simulated speed under rated load , .

[0031] C3. Extract the standard working efficiency corresponding to each simulation speed under rated load state from the database and record it as .

[0032] C4. Calculate the working efficiency qualification of the target thruster motor at each simulated speed under rated load , ,in, Indicates the work efficiency deviation from the set reference.

[0033] In a specific embodiment of the present invention, the specific process of calculating the heat dissipation performance stability of the target thruster motor at each simulated speed when the target thruster motor is in the rated load state is as follows: D1. The temperature of each monitoring time point at each simulated speed when the target thruster motor is in the rated load state is recorded as ,in, Indicates the number of the monitoring time point, .

[0034] D2. Calculate the temperature uniformity of the target thruster motor at each simulated speed under rated load. and temperature variation coefficient .

[0035] It should be noted that the formula for calculating the temperature uniformity of the target thruster motor at each simulated speed when in the rated load state is: ,in, Indicates that the target thruster motor corresponds to the first The simulation speed The temperature at each monitoring time point, Indicates the temperature deviation from the set reference. Indicates monitoring time points.

[0036] It should be noted that the specific process of calculating the temperature difference coefficient of the target thruster motor at each simulated speed when the target thruster motor is in the rated load state is as follows: the maximum value and the minimum value are extracted from the temperature of each monitoring time point at each simulated speed when the target thruster motor is in the rated load state, and are recorded as and .

[0037] Calculate the temperature difference coefficient of the target thruster motor at each simulated speed when it is under rated load , ,in, Indicates the temperature extreme value difference of the set reference.

[0038] D3. Calculate the heat dissipation stability of the target thruster motor at each simulated speed when in rated load state , ,in, and They represent the weights of the set temperature uniformity and temperature difference coefficient corresponding to the heat dissipation performance stability assessment. .

[0039] In a specific embodiment of the present invention, The setting value of is 0.5. The setting value is 0.5. In practical applications, it is usually necessary to consider the two factors of temperature uniformity and temperature difference coefficient. On the one hand, it is necessary to ensure that the temperature distribution inside the motor is uniform to improve system stability and performance consistency. On the other hand, attention should also be paid to the temperature difference coefficient to optimize thermal management efficiency and prevent thermal failure.

[0040] It should be noted that the specific process of calculating the vibration anomaly index of the target thruster motor at each simulated speed when the target thruster motor is in the rated load state is as follows: the vibration frequency and vibration amplitude of the target thruster motor at each simulated speed when the target thruster motor is in the rated load state are respectively recorded as and .

[0041] Calculate the vibration anomaly index of the target thruster motor at each simulated speed under rated load , ,in, and They respectively represent the vibration frequency and vibration amplitude of the set reference.

[0042] A2. Calculate the performance evaluation index of the target thruster motor at each simulated speed under rated load , ,in, , , and They represent the weights of the performance evaluation corresponding to the set thrust output stability, work efficiency qualification, vibration abnormality index and heat dissipation performance stability. .

[0043] In a specific embodiment of the present invention, The setting value of is 0.25. The setting value of is 0.25. The setting value of is 0.25. The setting value is 0.25. The thrust output stability is one of the key indicators to measure the performance stability of the thruster motor. The thrust output stability directly affects the operation stability and safety of the equipment. The work efficiency qualification reflects the energy conversion efficiency of the thruster motor in the process of converting electrical energy into mechanical energy. High efficiency means lower energy consumption and longer endurance, which is especially important for equipment that needs to run for a long time or has limited energy. The vibration abnormality index is an important indicator to measure the vibration of the thruster motor during operation. Excessive vibration may cause structural damage, performance degradation, and even failure shutdown of the equipment. The stability of heat dissipation performance is directly related to the temperature control ability and long-term operation reliability of the thruster motor. Good heat dissipation performance can ensure that the motor can maintain a stable temperature under long-term high-load operation, avoiding performance degradation or damage due to overheating. Therefore, in practical applications, these four factors often need to be considered comprehensively.

[0044] The embodiment of the present invention achieves a comprehensive evaluation of the performance of the thruster motor by comprehensively analyzing the performance evaluation index of the target thruster motor from four aspects: thrust output smoothness, work efficiency qualification, abnormal vibration and heat dissipation performance stability. This comprehensive evaluation method helps to discover potential fault hazards and provide strong support for subsequent improvement and optimization.

[0045] In a specific embodiment of the present invention, the specific method for judging whether the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard is: the performance evaluation index of the target propeller motor at each simulated speed in the rated load state is averaged to obtain the average performance evaluation index of the target propeller motor at the corresponding simulated speed in the rated load state, and compare it with the performance evaluation index corresponding to the set reference rated load state. If the average performance evaluation index of the target propeller motor at the corresponding simulated speed in the rated load state is greater than or equal to the performance evaluation index corresponding to the set reference rated load state, it indicates that the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard; otherwise, it indicates that the performance of the target propeller motor at the corresponding simulated speed in the rated load state does not meet the standard.

[0046] The no-load state performance judgment module is used to collect performance information of the target thruster motor at each simulated speed when in the no-load state, and to judge whether the performance of the target thruster motor at the simulated speed when in the no-load state meets the standard. If not, feedback is provided.

[0047] It should be noted that the performance information of the target thruster motor at each simulated speed in the no-load state also includes the output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point.

[0048] In a specific embodiment of the present invention, the method for judging whether the performance of the target propeller motor at the corresponding simulated speed in the no-load state meets the standard is: based on the performance information of the target propeller motor at each simulated speed in the no-load state, the performance evaluation index of the target propeller motor at each simulated speed in the no-load state is analyzed in the same way as the analysis method of the performance evaluation index of the target propeller motor at each simulated speed in the rated load state, and then whether the performance of the target propeller motor at the corresponding simulated speed in the no-load state meets the standard is judged in the same way as the judgment method of whether the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard.

[0049] The database is used to store the standard thrust output curves corresponding to each simulation speed in the rated load state and the no-load state, and to store the standard working efficiency corresponding to each simulation speed in the rated load state and the no-load state.

[0050] Table 1 Data sources in the database of this embodiment

[0051]

[0052] The limit speed performance evaluation module is used to extract the limit speed of the target thruster motor, collect performance information of the target thruster motor at the limit speed in the rated load state and the no-load state, and evaluate the performance evaluation index of the target thruster motor at the limit speed in the rated load state and the no-load state.

[0053] It should be noted that the limiting speed of the target thruster motor is extracted from the production manual of the target thruster motor. The performance information of the target thruster motor at the limiting speed in the rated load state and the no-load state also includes the output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point.

[0054] In a specific embodiment of the present invention, the method for evaluating the performance evaluation index of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state is: based on the performance information of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state, the performance evaluation index of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state is analyzed respectively in the same manner as the analysis method of the performance evaluation index of the target thruster motor at each simulated speed in the rated load state.

[0055] The limit state performance judgment module is used to judge whether the limit state performance of the target thruster motor meets the standard, and if not, provide feedback.

[0056] In a specific embodiment of the present invention, the specific process of determining whether the limit state performance of the target thruster motor meets the standard is as follows: E1, the performance evaluation index of the target thruster motor at the corresponding limit speed in the rated load state is recorded as .

[0057] E2, the average performance evaluation index of the target thruster motor at the corresponding simulation speed in the rated load state is recorded as .

[0058] E3. Calculate the performance deviation index of the target thruster motor under the corresponding limit state when under rated load , ,in, and They represent the performance comparison value deviation and performance standard value deviation of the set reference respectively, It indicates the performance evaluation index under the corresponding limit state when the reference rated load state is set.

[0059] E4. Compare the performance deviation index of the target thruster motor under the rated load state corresponding to the limit state with the performance deviation index of the set reference. If the performance deviation index of the target thruster motor under the rated load state corresponding to the limit state is greater than or equal to the performance deviation index of the set reference, it indicates that the limit state performance of the target thruster motor under the rated load state does not meet the standard. Otherwise, it indicates that the limit state performance of the target thruster motor under the rated load state meets the standard.

[0060] E5. Determine whether the limit state performance of the target thruster motor in the no-load state meets the standard in accordance with the determination method of whether the limit state performance of the target thruster motor in the rated load state meets the standard.

[0061] The embodiment of the present invention performs performance tests on the thruster motor under various simulated speed conditions and limit speed conditions. By comparing the performance differences under the simulated speed and the limit speed, the load capacity of the thruster motor can be accurately evaluated, helping to discover potential performance bottlenecks while ensuring that the thruster motor can operate reliably under extreme conditions.

[0062] The embodiment of the present invention improves the coverage of the propeller motor performance evaluation by analyzing the propeller motor performance under two load conditions: a full load state and an empty load state, thereby ensuring the credibility of the propeller motor performance evaluation result.

[0063] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A propeller motor high speed simulation test system, characterized in that: include: A performance information collection module is used to record the propeller motor of the target underwater vehicle as the target propeller motor, perform a simulation test on the target propeller motor in the target simulation software, and collect performance information of the target propeller motor corresponding to each simulation speed when in a rated load state; The rated load state performance judgment module is used to analyze the performance evaluation index of the target thruster motor at each simulated speed in the rated load state, and judge whether the performance of the target thruster motor at the simulated speed in the rated load state meets the standard. If it does not meet the standard, feedback is given; The no-load state performance judgment module is used to collect the performance information of the target thruster motor at each simulated speed when in the no-load state, and judge whether the performance of the target thruster motor at the simulated speed when in the no-load state meets the standard. If not, feedback is given; A database, used to store standard thrust output curves corresponding to each simulation speed in a rated load state and a no-load state, and to store standard working efficiencies corresponding to each simulation speed in a rated load state and a no-load state; A limit speed performance evaluation module is used to extract the limit speed of the target thruster motor, collect the performance information of the target thruster motor at the limit speed in the rated load state and the no-load state, and evaluate the performance evaluation index of the target thruster motor at the limit speed in the rated load state and the no-load state; The limit state performance judgment module is used to judge whether the limit state performance of the target thruster motor meets the standard, and provide feedback if it does not meet the standard.

2. A propeller motor high speed simulation test system according to claim 1, characterized in that: The performance information includes output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point.

3. A propeller motor high speed simulation test system according to claim 2, characterized in that: The specific process of analyzing the performance evaluation index of the target thruster motor at each simulated speed in the rated load state is as follows: A1. Extract the output thrust, output power, input power, vibration frequency, vibration amplitude and temperature at each monitoring time point from the performance information of the target thruster motor at each simulated speed in the rated load state, and calculate the thrust output stability of the target thruster motor at each simulated speed in the rated load state based on the performance information. , Work efficiency qualification , Vibration Abnormal Index and heat dissipation stability ,in, The number indicating the simulation speed. ; A2. Calculate the performance evaluation index of the target thruster motor at each simulated speed under rated load , ,in, , , and They represent the weights of the performance evaluation corresponding to the set thrust output stability, work efficiency qualification, vibration abnormality index and heat dissipation performance stability. .

4. A propeller motor high speed simulation test system according to claim 3, characterized in that: The specific process of calculating the thrust output smoothness of the target thruster motor at each simulated speed in the rated load state is as follows: B1. With the monitoring time point as the horizontal coordinate and the output thrust as the vertical coordinate, a thrust output curve of the target thruster motor corresponding to each simulation speed in the rated load state is constructed, and the thrust output curve is overlapped and compared with the standard thrust output curve corresponding to each simulation speed in the rated load state stored in the database, and the overlapping length of the thrust output curve of the target thruster motor corresponding to each simulation speed in the rated load state is obtained, and recorded as ; B2. Calculate the thrust output stability of the target thruster motor at each simulated speed under rated load , ,in, Indicates the overlap length of the thrust output curve for setting reference. Represents a natural constant.

5. The propeller motor high speed simulation test system according to claim 3, characterized in that: The specific process of calculating the working efficiency qualification of the target thruster motor at each simulation speed in the rated load state is as follows: C1, the output power and input power of the target thruster motor at each simulation speed under the rated load state are recorded as and ; C2. Calculate the working efficiency of the target thruster motor at each simulated speed under rated load , ; C3. Extract the standard working efficiency corresponding to each simulation speed under rated load state from the database and record it as ; C4. Calculate the working efficiency qualification of the target thruster motor at each simulated speed under rated load , ,in, Indicates the work efficiency deviation from the set reference.

6. A propeller motor high speed simulation test system according to claim 4, characterized in that: The specific process of calculating the heat dissipation performance stability of the target thruster motor at each simulated speed in the rated load state is as follows: D1. The temperature of the target thruster motor at each monitoring time point corresponding to each simulation speed in the rated load state is recorded as ,in, Indicates the number of the monitoring time point, ; D2. Calculate the temperature uniformity of the target thruster motor at each simulated speed under rated load. and temperature variation coefficient ; D3. Calculate the heat dissipation stability of the target thruster motor at each simulated speed when in rated load state , ,in, and They represent the weights of the set temperature uniformity and temperature difference coefficient corresponding to the heat dissipation performance stability assessment. .

7. A propeller motor high speed simulation test system according to claim 3, characterized in that: The specific method for judging whether the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard is: calculating the average of the performance evaluation indexes of the target propeller motor at each simulated speed in the rated load state to obtain the average performance evaluation index of the target propeller motor at the corresponding simulated speed in the rated load state, and comparing it with the performance evaluation index corresponding to the set reference rated load state. If the average performance evaluation index of the target propeller motor at the corresponding simulated speed in the rated load state is greater than or equal to the performance evaluation index corresponding to the set reference rated load state, it indicates that the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard; otherwise, it indicates that the performance of the target propeller motor at the corresponding simulated speed in the rated load state does not meet the standard.

8. A propeller motor high speed simulation test system according to claim 7, characterized in that: The method for judging whether the performance of the target propeller motor at the corresponding simulated speed in the no-load state meets the standard is as follows: based on the performance information of the target propeller motor at each simulated speed in the no-load state, the performance evaluation index of the target propeller motor at each simulated speed in the no-load state is analyzed in the same manner as the analysis method of the performance evaluation index of the target propeller motor at each simulated speed in the rated load state, and then whether the performance of the target propeller motor at the corresponding simulated speed in the no-load state meets the standard is judged in the same manner as the judgment method of whether the performance of the target propeller motor at the corresponding simulated speed in the rated load state meets the standard.

9. A propeller motor high speed simulation test system according to claim 8, characterized in that: The method for evaluating the performance evaluation index of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state is: based on the performance information of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state, the performance evaluation index of the target thruster motor at the corresponding limiting speeds in the rated load state and the no-load state is analyzed in the same way as the analysis method of the performance evaluation index of the target thruster motor at each simulated speed in the rated load state.

10. A propeller motor high speed simulation test system according to claim 9, characterized in that: The specific process of judging whether the limit state performance of the target thruster motor meets the standard is as follows: E1. The performance evaluation index of the target thruster motor at the corresponding limit speed under rated load is recorded as ; E2, the average performance evaluation index of the target thruster motor at the corresponding simulation speed in the rated load state is recorded as ; E3. Calculate the performance deviation index of the target thruster motor under the corresponding limit state when under rated load , ,in, and They represent the performance comparison value deviation and performance standard value deviation of the set reference respectively, It indicates the performance evaluation index under the corresponding limit state when the reference rated load state is set; E4. Compare the performance deviation index of the target thruster motor under the rated load state corresponding to the limit state with the performance deviation index of the set reference. If the performance deviation index of the target thruster motor under the rated load state corresponding to the limit state is greater than or equal to the performance deviation index of the set reference, it indicates that the limit state performance of the target thruster motor under the rated load state does not meet the standard. Otherwise, it indicates that the limit state performance of the target thruster motor under the rated load state meets the standard. E5. Determine whether the limit state performance of the target thruster motor in the no-load state meets the standard in accordance with the determination method of whether the limit state performance of the target thruster motor in the rated load state meets the standard.

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