Intelligent control method for ship electric control valve actuator

Abstract

The present invention discloses an intelligent control method for an electric control valve actuator for a ship. The present invention pre-processes and comprehensively evaluates the collected fluid pressure data at a ship control center, first calculates the pressure evaluation value within a set time period, then matches it with a preset range interval to obtain a pressure index, and combines it with an ideal pressure index corresponding to the operating condition, so that the valve opening adjustment can better adapt to the host's requirements for changes in fuel pressure under different working conditions. At the same time, for a gradually rising or falling pressure state, the pressure change rate is calculated and the state interval is divided, and the pressure change index is calculated in combination with weight coefficients of different intervals. The opening optimization value and the adjustment direction are determined according to the pressure change index and a preset index value range, thereby achieving precise control, being able to respond in a timely manner to changes in the operating conditions of the ship's main engine and fluctuations in the pressure of the fuel system, effectively ensuring a stable supply of fuel flow and pressure, and improving the operating efficiency and stability of the ship's main engine.

Description

Technical Field

[0001] The present invention relates to the technical field of actuator control, and in particular to an intelligent control method applied to an actuator of a ship electric control valve. Background Art

[0002] During the operation of ships, the delivery and control of various fluids such as fuel are crucial; electric control valve actuators are used to control the valve opening in these fluid pipelines, thereby achieving accurate adjustment of parameters such as flow and pressure.

[0003] However, the intelligent control method used in the prior art for the electric control valve actuator of a ship still has the following deficiencies:

[0004] The lack of effective integration and real-time monitoring of fluid pressure and valve opening values ​​results in the inability to obtain comprehensive operating status information in a timely manner. At the same time, the assessment of fluid pressure is not accurate and comprehensive enough, and fails to fully combine the operating conditions of the ship's main engine for comprehensive analysis, resulting in low accuracy and intelligence of subsequent control.

[0005] Therefore, an intelligent control method for ship electric control valve actuators is introduced. Summary of the invention

[0006] In view of this, the present invention provides an intelligent control method applied to a ship electric control valve actuator to solve the problems raised by the above background technology.

[0007] The purpose of the present invention can be achieved by the following technical solution: An intelligent control method applied to a ship electric control valve actuator comprises:

[0008] Data collection: Use pre-installed sensors to collect real-time data at a set sampling frequency, and transmit the collected real-time data to the ship control center through a wireless network; the real-time data includes fluid pressure and valve opening value;

[0009] Data analysis: The ship control center receives the collected fluid pressure and performs preprocessing. After the preprocessing is completed, the fluid pressure in the real-time data is comprehensively evaluated to obtain the index difference Ki and the pressure change index Fc, where i=1 or 2. Based on the results of the index difference Ki and the pressure change index Fc, the corresponding adjustment signal is generated to the actuator;

[0010] Control valve: The actuator receives the generated adjustment signal and analyzes it to obtain the target opening value of the valve at the current time point, and adjusts the valve opening to the target opening value;

[0011] Abnormal evaluation: After the adjustment is completed, measure and obtain the actual opening value of the current valve, and compare it with the target opening value corresponding to the adjustment signal. If the comparison result shows inconsistency, the abnormal signaling is triggered and the corresponding steps are executed.

[0012] In some embodiments, a comprehensive evaluation is performed on the fluid pressure in the real-time data, specifically:

[0013] S1: After reaching the set sampling frequency, the fluid pressure corresponding to the fuel system within the set time period is collected; the fluid pressure value corresponding to the fuel system at each time point within the set time period is extracted, and then the average of the fluid pressure values ​​corresponding to the fuel system at each time point within the set time period is calculated to obtain the pressure evaluation value of the fuel system within the set time period;

[0014] Preset respective groups of range intervals corresponding to the pressure evaluation values, and set each group of range intervals to correspond to a pressure index; match the pressure evaluation value of the fuel system within a set time period with the corresponding preset range interval, so as to obtain the corresponding pressure index;

[0015] The operating condition of the current ship main engine is obtained, and different operating conditions are set to correspond to an ideal pressure index respectively; the ideal pressure index corresponding to the current ship main engine is obtained.

[0016] In some embodiments, the specific steps of obtaining the index difference Ki are:

[0017] S2: Compare the pressure index of the fuel system within the set time period with the ideal pressure index. If the comparison results show the same, obtain the current valve opening value as the basic adjustment value; if the comparison results show different, further calculate the difference between the pressure index and the ideal pressure index to obtain the index difference K1 or K2, mark the pressure index and the ideal pressure index as u1 and u2 respectively, if u1>u2, obtain K1 through u1-u2, if u1<u2, obtain K2 through u2-u1;

[0018] Identify the index difference between the current pressure index and the ideal pressure index; if the index difference is K1, extract each group of index difference value ranges of the index difference K1 corresponding to each working condition from the pre-constructed database; if the index difference is K2, extract each group of index difference value ranges of the index difference K2 corresponding to each working condition from the pre-constructed database; set each group of index difference value ranges to correspond to a valve opening adjustment direction and adjustment value; match the calculated index difference K1 or K2 with the corresponding index value range, so as to obtain the corresponding valve adjustment direction and adjustment value;

[0019] The current valve opening value is obtained, and the current valve opening value is calculated based on the obtained valve adjustment direction and adjustment value as a basic adjustment value.

[0020] In some embodiments, the specific steps for obtaining the pressure change index Fc are:

[0021] S3: extracting the fluid pressure value corresponding to the fuel system at each time point within the set time period. After the extraction is completed, a data pair of time point-fluid pressure value is formed starting from the starting time point, and the difference of the fluid pressure values ​​of adjacent time data pairs is calculated, that is, the fluid pressure value on the right side of the adjacent time data pair is subtracted from the fluid pressure value on the left side. If the difference calculated for a certain adjacent time data pair is a negative value, the absolute value of the group of differences is taken and marked as a pressure drop value. If the difference calculated for a certain adjacent time data pair is a positive value, the group of differences is marked as a pressure increase value.

[0022] The calculated pressure drop value and pressure increase value are compared. If the pressure increase value is greater than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually increasing state within the set time period. If the pressure increase value is less than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually decreasing state within the set time period. Step S4 or S5 is executed accordingly based on the determination result.

[0023] S4: If the determination result is a gradually rising state, then extract each group of pressure rise values ​​to calculate the pressure change rate corresponding to each group of pressure rise values, and calculate it by pressure rise value / unit time; preset three groups of change rate value ranges corresponding to the pressure change rate, set each group of change rate value ranges to correspond to a state interval, wherein the state interval includes a slow change interval, a medium change interval and a fast change interval; match each group of pressure change rates with the corresponding change rate value ranges, so as to obtain the state interval corresponding to each group of pressure change rates;

[0024] Set a weight coefficient corresponding to each state interval, accumulate the unit time of each group of pressure change rates belonging to the same state interval, and obtain the pressure change duration of each state interval. Multiply the pressure change duration of each state interval by the corresponding weight coefficient, and then sum them to obtain the pressure change index Fc within the set time period;

[0025] S5: If the determination result is a gradually decreasing state, the pressure change index Fc within the set time period is calculated similarly to step S4.

[0026] In some embodiments, a corresponding adjustment signal is generated to the actuator based on the result of the index difference Ki and the pressure change index Fc, specifically:

[0027] S6: respectively preset the index value ranges of the pressure change index Fc corresponding to the gradually rising state and the gradually falling state, and based on the result of the judgment in step S3, match the pressure change index Fc within the set time period with the corresponding index value ranges of each group, and set each index value range to correspond to an opening optimization value: obtain the opening optimization value within the set time period; set the gradually rising state and the gradually falling state to correspond to a valve opening adjustment direction, and adjust the basic adjustment value in step S2 based on the valve opening adjustment direction and the opening optimization value corresponding to the current judgment result, and use the adjusted result as the target opening value of the valve at the current time point, and thereby generate an adjustment signal.

[0028] In some embodiments, abnormal signaling is triggered and corresponding steps are performed, specifically:

[0029] M1: Calculate the difference between the actual opening value and the target opening value, record it as the opening error value, compare the calculated opening error value with the preset error threshold, if the opening error value is greater than the preset error threshold, execute step M2;

[0030] M2: First, extract the adjustment signal sent by the ship control center and perform verification. If the verification result is abnormal, it is determined to be a communication abnormality; if the verification result is normal, start the self-test program pre-set in the actuator power source for self-test;

[0031] If there is an abnormality in the self-test, it is determined that the power source of the actuator is abnormal. If the self-test result is normal, the usage time of the actuator is extracted from the pre-constructed database, and the value ranges of each group of time lengths corresponding to the usage time are set. Each group of time length value ranges corresponds to a reference maintenance time interval of an actuator; the usage time of the actuator is matched with each group of time length value ranges to obtain the reference maintenance time interval of the actuator; the time interval from the last maintenance of the actuator is extracted and compared with the reference maintenance time interval. If the time interval from the last maintenance is greater than the reference maintenance time interval, a maintenance alarm signal is sent to the ship operator, and the ship operator maintains the actuator after receiving the signal.

[0032] In some embodiments, triggering abnormal signaling and executing corresponding steps further includes:

[0033] M3: Based on step M2, if the opening error value is still greater than the preset error threshold after maintenance is completed, step M4 is executed accordingly;

[0034] M4: Obtain the historical processing times of each operator on the ship at the current time point, extract the number of successful processing times from the historical processing times of each operator, and calculate the proportion of successful processing times in the historical processing times to obtain the capability value Q1;

[0035] Extract the time taken by each operator for each successful processing, calculate the average of the time taken for each processing, and thus obtain the efficiency value Q2 of each operator;

[0036] Analyze the processing results of each operator corresponding to the number of successful processing times, and count the number of types of processing results as the experience value Q3 of each operator;

[0037] The preset ability value Q1, efficiency value Q2 and experience value Q3 correspond to the ability passing value D1, efficiency passing value D2 and experience passing value D3 respectively;

[0038] According to the formula , perform weighted calculation on the capability value Q1, efficiency value Q2 and experience value Q3 of each operator, so as to obtain the evaluation value Pa of each operator; where h1, h2 and h3 are the weighted influence factors corresponding to the capability value Q1, efficiency value Q2 and experience value Q3 respectively;

[0039] The operator with the largest evaluation value Pa is selected as the processing personnel. After arriving at the site, the processing personnel determines the reason why the opening error value is still greater than the preset error threshold, and uses the determined reason as the processing result of this processing;

[0040] M5: If the time interval from the last maintenance in step M2 is less than the reference maintenance time interval, step M4 is also executed accordingly.

[0041] In some embodiments, triggering abnormal signaling and executing corresponding steps further includes:

[0042] M6: When the opening error value is greater than the preset error threshold, the difference between the two is calculated as the judgment difference, and the reason why it is greater than the preset error threshold is determined through steps M1 to M5. The judgment difference is used as the reference value, and the preset upper and lower fluctuation ranges are integrated to form the threshold fluctuation range corresponding to the current judgment reason and store it in a pre-constructed database. When the opening error value within a set time period is greater than the preset error threshold, the judgment difference is matched with each group of threshold fluctuation ranges in the database to obtain the corresponding judgment reason as the estimated reason and send it to the ship control center.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The present invention pre-processes and comprehensively evaluates the collected fluid pressure data at the ship control center, first calculates the pressure evaluation value within a set time period, then matches it with the preset range interval to obtain the pressure index, and combines it with the ideal pressure index corresponding to the operating condition, so that the valve opening adjustment can better adapt to the host's requirements for the change of fuel pressure under different working conditions. At the same time, for the gradually rising or falling pressure state, the pressure change rate is further calculated and the state interval is divided, and the pressure change index is calculated in combination with the weight coefficients of different intervals. The opening optimization value and the adjustment direction are determined according to the pressure change index and the preset index value range, thereby realizing precise control. This precise control can respond to the changes in the operating conditions of the ship's main engine and the fluctuations in the fuel system pressure in a timely manner, effectively ensure the stable supply of fuel flow and pressure, and improve the operating efficiency and stability of the ship's main engine;

[0045] The present invention calculates the opening error between the actual opening value and the target opening value, and compares it with a preset error threshold. When the error value is greater than the threshold, it sequentially performs multiple steps of troubleshooting, such as adjusting signal verification, actuator power source check, actuator usage time and maintenance time interval analysis, etc., which can quickly locate problems in communication, actuator power source or maintenance cycle, and improve the abnormality judgment ability.

[0046] The present invention obtains the historical processing times of operators and performs analysis and calculation to obtain the merit value of each operator, and selects the best operator according to the merit value, thereby improving the efficiency and accuracy of abnormal processing, helping to solve the abnormal valve opening problem in time and ensuring the safe operation of the ship;

[0047] The present invention makes a detailed cause determination for each situation where the opening error value is greater than a threshold value, forms a threshold fluctuation range based on the determination difference and stores it in a database. When the opening error value is abnormal again, the cause can be estimated by matching with the database and measures can be taken in advance, thereby enhancing the ability to predict and respond to abnormal situations and improving the reliability and safety of ship operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Further details, features and advantages of the present application are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0049] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0050] Several embodiments of the present application will be described in more detail below with reference to the accompanying drawings so that those skilled in the art can implement the present application. The present application can be embodied in many different forms and purposes and should not be limited to the embodiments described herein. These embodiments are provided to make the present application comprehensive and complete, and to fully convey the scope of the present application to those skilled in the art. The embodiments do not limit the present application.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0052] See also Figure 1 As shown, the intelligent control method applied to the ship electric control valve actuator includes:

[0053] Data collection: Use pre-installed sensors to collect real-time data at a set sampling frequency, and transmit the collected real-time data to the ship control center through a wireless network; the real-time data includes fluid pressure and valve opening value;

[0054] The fluid pressure is measured by the pressure sensor pre-installed before and after the valve; the angle sensor measures the valve opening value;

[0055] Data analysis: The ship control center receives the collected fluid pressure and performs preprocessing; the preprocessing includes filtering the collected sensor data to remove noise interference; after the preprocessing is completed, the fluid pressure in the real-time data is comprehensively evaluated to obtain the index difference Ki and the pressure change index Fc, where i=1 or 2, and the corresponding adjustment signal is generated to the actuator based on the results of the index difference Ki and the pressure change index Fc;

[0056] Specifically:

[0057] S1: Through the pressure sensor installed in front of the valve, after reaching the set sampling frequency, the fluid pressure corresponding to the fuel system within the set time period is collected;

[0058] Extracting the fluid pressure value corresponding to the fuel system at each time point within the set time period, and then averaging the fluid pressure values ​​corresponding to the fuel system at each time point within the set time period to obtain a pressure evaluation value of the fuel system within the set time period;

[0059] The technicians preset the range intervals corresponding to the pressure evaluation values ​​according to the setting and operation experience of the ship fuel system, and set each range interval to correspond to a pressure index; the pressure evaluation value of the fuel system within the set time period is matched with the corresponding preset range interval to obtain the corresponding pressure index;

[0060] Obtain the operating conditions of the current ship's main engine; the operating conditions include starting, cruising, acceleration and deceleration, etc.; set different operating conditions to correspond to an ideal pressure index; obtain the ideal pressure index corresponding to the current ship's main engine;

[0061] S2: Compare the pressure index of the fuel system within the set time period with the ideal pressure index. If the comparison results show the same, obtain the current valve opening value as the basic adjustment value; if the comparison results show different, further calculate the difference between the pressure index and the ideal pressure index to obtain the index difference K1 or K2, mark the pressure index and the ideal pressure index as u1 and u2 respectively, if u1>u2, obtain K1 through u1-u2, if u1<u2, obtain K2 through u2-u1;

[0062] Identify the index difference between the current pressure index and the ideal pressure index; if the index difference is K1, extract each group of index difference value ranges of the index difference K1 corresponding to each working condition from the pre-constructed database; if the index difference is K2, extract each group of index difference value ranges of the index difference K2 corresponding to each working condition from the pre-constructed database; set each group of index difference value ranges to correspond to a valve opening adjustment direction and adjustment value; the opening adjustment direction includes increase and decrease, and is set according to the specific operating conditions and index difference type; match the calculated index difference K1 or K2 with the corresponding index value range to obtain the corresponding valve adjustment direction and adjustment value;

[0063] For example, based on the settings and operating experience of the ship's fuel system, the technicians preset the following ranges and pressure indices corresponding to the pressure assessment values: 0-0.15MPa: pressure index is 0.2; 0.15-0.25MPa: pressure index is 0.5; 0.25-0.35MPa: pressure index is 0.8; 0.35MPa and above: pressure index is 1.

[0064] Matching the pressure assessment value 0.22MPa with the above range, it can be seen that it is in the range of 0.15-0.25MPa, so the corresponding pressure index u1 is 0.5;

[0065] Assuming that the main engine of the ship is currently in an accelerating condition, according to the setting, the ideal pressure index u2 corresponding to the accelerating condition is 0.8;

[0066] Since u1 (0.5) < u2 (0.8), according to the rule, the exponential difference K2 is obtained by u2-u1, that is, K2=0.8-0.5=0.3.

[0067] Extract the index difference value range and corresponding adjustment information: Extract the index difference value range of each group of index difference K2 corresponding to the acceleration condition and the corresponding valve opening adjustment direction and adjustment value from the pre-built database; assume that the database contains the following information:

[0068] |Exponential difference value range|Valve opening adjustment direction|Valve opening adjustment value|;

[0069] |0-0.2|increase|5%|;

[0070] |0.2-0.4|increase|10%|;

[0071] |0.4-0.6|increase|15%|;

[0072] The calculated index difference K2 (0.3) is matched with the above index difference value range, and it can be seen that 0.3 is in the range of 0.2-0.4. Therefore, the corresponding valve opening adjustment direction is to increase, and the valve opening adjustment value is 10%;

[0073] This means that under the current acceleration condition, since the pressure index is lower than the ideal pressure index and the index difference is 0.3, according to the pre-set rules, the valve opening needs to be increased by 10% to meet the host's demand for fuel pressure during acceleration, thereby ensuring the normal operation of the fuel system;

[0074] Obtain the current valve opening value, and calculate the current valve opening value based on the obtained valve adjustment direction and adjustment value as the basic adjustment value;

[0075] S3: extracting the fluid pressure value corresponding to the fuel system at each time point within the set time period. After the extraction is completed, a data pair of time point-fluid pressure value is formed starting from the starting time point, and the difference of the fluid pressure values ​​of adjacent time data pairs is calculated, that is, the fluid pressure value on the right side of the adjacent time data pair is subtracted from the fluid pressure value on the left side. If the difference calculated for a certain adjacent time data pair is a negative value, the absolute value of the group of differences is taken and marked as a pressure drop value. If the difference calculated for a certain adjacent time data pair is a positive value, the group of differences is marked as a pressure increase value.

[0076] The calculated pressure drop value and pressure increase value are compared. If the pressure increase value is greater than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually increasing state within the set time period. If the pressure increase value is less than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually decreasing state within the set time period. Step S4 or S5 is executed accordingly based on the determination result.

[0077] S4: If the result of the determination is a gradually rising state, then extract each group of pressure rise values ​​to calculate the pressure change rate corresponding to each group of pressure rise values, and calculate it by pressure rise value / unit time; the pressure change rate reflects the speed of pressure change; three groups of change rate value ranges corresponding to the preset pressure change rate are set, and each group of change rate value ranges is set to correspond to a state interval, wherein the state interval includes a slow change interval, a medium change interval, and a fast change interval; each group of pressure change rates is matched with the corresponding change rate value range, so as to obtain the state interval corresponding to each group of pressure change rates;

[0078] Set a weight coefficient corresponding to each state interval, accumulate the unit time of each group of pressure change rates belonging to the same state interval, and obtain the pressure change duration of each state interval. Multiply the pressure change duration of each state interval by the corresponding weight coefficient, and then sum them to obtain the pressure change index Fc within the set time period;

[0079] It should be noted that the weight coefficient of the fast-changing interval is greater than the weight coefficient of the medium-changing interval and greater than the weight coefficient of the slow-changing interval.

[0080] S5: If the determination result is a gradual decrease, the pressure change index Fc within the set time period is calculated similarly to step S4;

[0081] S6: respectively presetting the index value ranges of the pressure change index Fc corresponding to the gradually rising state and the gradually falling state, matching the pressure change index Fc within the set time period with the corresponding index value ranges of each group based on the result of the determination in step S3, setting each index value range to correspond to an opening optimization value: obtaining the opening optimization value within the set time period; setting the gradually rising state and the gradually falling state to correspond to a valve opening adjustment direction, the gradually rising state corresponding to the valve opening adjustment direction is decreasing, and the gradually falling state corresponding to the valve opening adjustment direction is increasing;

[0082] The larger the pressure change index Fc is, the higher the opening optimization value obtained by the corresponding matching is;

[0083] The basic adjustment value in step S2 is adjusted based on the valve opening adjustment direction and the opening optimization value corresponding to the current determination result, and the adjusted result is used as the target opening value of the valve at the current time point, thereby generating an adjustment signal;

[0084] Control valve: The actuator receives the generated adjustment signal and analyzes it to obtain the target opening value of the valve at the current time point, and adjusts the valve opening to the target opening value;

[0085] Abnormal evaluation: After the adjustment is completed, the actual opening value of the current valve is measured and obtained, and compared with the target opening value corresponding to the adjustment signal. If the comparison result shows inconsistency, the abnormal signaling is triggered and the corresponding steps are executed;

[0086] Specifically:

[0087] M1: Calculate the difference between the actual opening value and the target opening value, record it as the opening error value, compare the calculated opening error value with the preset error threshold, if the opening error value is greater than the preset error threshold, execute step M2;

[0088] It should be noted that the threshold value is determined in combination with the stability of the ship's fuel system in actual operation and the action characteristics of the valve.

[0089] M2: First, extract the adjustment signal sent by the ship control center and check it. If the test result is abnormal, it is determined to be a communication abnormality; if the test result is normal, start the self-check program pre-set in the actuator power source for self-check; the power source is a motor, and the self-check includes checking the current and voltage, checking whether the motor is running normally, whether the winding is short-circuited, etc.;

[0090] If there is an abnormality in the self-test, it is determined that the actuator power source is abnormal. If the self-test result is normal, the use time of the actuator is extracted from the pre-built database, and the value ranges of each group of time corresponding to the use time are set. Each group of time value ranges corresponds to a reference maintenance time interval of an actuator; the longer the use time, the shorter the corresponding matched maintenance time interval; the use time of the actuator is matched with each group of time value ranges to obtain the reference maintenance time interval of the actuator; the time interval from the last maintenance of the actuator is extracted and compared with the reference maintenance time interval. If the time interval from the last maintenance is greater than the reference maintenance time interval, a maintenance alarm signal is sent to the ship operator through an audible and visual alarm, and the ship operator performs maintenance on the actuator after receiving it;

[0091] M3: Based on step M2, if the opening error value is still greater than the preset error threshold after maintenance is completed, step M4 is executed accordingly;

[0092] M4: Obtain the historical processing times of each operator on the ship at the current time point, extract the number of successful processing times from the historical processing times of each operator, and calculate the proportion of successful processing times in the historical processing times to obtain the capability value Q1;

[0093] Extract the time taken by each operator for each successful processing, calculate the average of the time taken for each processing, and thus obtain the efficiency value Q2 of each operator;

[0094] Analyze the processing results of each operator corresponding to the number of successful processing times, and count the number of types of processing results as the experience value Q3 of each operator;

[0095] The preset ability value Q1, efficiency value Q2 and experience value Q3 correspond to the ability passing value D1, efficiency passing value D2 and experience passing value D3 respectively;

[0096] According to the formula , perform weighted calculation on the capability value Q1, efficiency value Q2 and experience value Q3 of each operator, so as to obtain the evaluation value Pa of each operator; where h1, h2 and h3 are the weighted influence factors corresponding to the capability value Q1, efficiency value Q2 and experience value Q3 respectively;

[0097] The operator with the largest evaluation value Pa is selected as the processing personnel. After arriving at the site, the processing personnel determines the reason why the opening error value is still greater than the preset error threshold, and uses the determined reason as the processing result of this processing;

[0098] M5: If the time interval from the last maintenance in step M2 is less than the reference maintenance time interval, then step M4 is also executed accordingly;

[0099] M6: When the opening error value is greater than the preset error threshold, the difference between the two is calculated as the judgment difference, and the reason why it is greater than the preset error threshold is determined through steps M1 to M5. The judgment difference is used as the reference value, and the preset upper and lower fluctuation ranges are integrated to form the threshold fluctuation range corresponding to the current judgment reason and store it in a pre-built database. When the opening error value within a certain set time period is greater than the preset error threshold, the judgment difference is matched with each group of threshold fluctuation ranges in the database, so as to obtain the corresponding judgment reason as the estimated reason and send it to the ship control center;

[0100] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent control method for a ship electric control valve actuator, characterized in that: include: Data collection: Use pre-deployed sensors to collect real-time data at a set sampling frequency, and transmit the collected real-time data to the ship control center via a wireless network; The real-time data includes fluid pressure and valve opening value; Data analysis: The ship control center receives the collected fluid pressure and performs preprocessing. After the preprocessing is completed, the fluid pressure in the real-time data is comprehensively evaluated to obtain the index difference Ki and the pressure change index Fc, where i=1 or 2. Based on the results of the index difference Ki and the pressure change index Fc, the corresponding adjustment signal is generated to the actuator; Control valve: The actuator receives the generated adjustment signal and analyzes it to obtain the target opening value of the valve at the current time point, and adjusts the valve opening to the target opening value; Abnormal evaluation: After the adjustment is completed, the actual opening value of the current valve is measured and obtained, and compared with the target opening value corresponding to the adjustment signal. If the comparison result shows inconsistency, the abnormal signaling is triggered and the corresponding steps are executed; Trigger abnormal signaling and execute corresponding steps, specifically: M1: Calculate the difference between the actual opening value and the target opening value, record it as the opening error value, compare the calculated opening error value with the preset error threshold, if the opening error value is greater than the preset error threshold, execute step M2; M2: First, extract the adjustment signal sent by the ship control center and perform verification. If the verification result is abnormal, it is determined to be a communication abnormality; if the verification result is normal, start the self-test program pre-set in the actuator power source for self-test; If there is an abnormality in the self-test, it is determined that the actuator power source is abnormal. If the self-test result is normal, the use time of the actuator is extracted from the pre-built database, and the value ranges of each group of time corresponding to the use time are set. Each group of time value ranges corresponds to a reference maintenance time interval of an actuator; the use time of the actuator is matched with each group of time value ranges to obtain the reference maintenance time interval of the actuator; the time interval from the last maintenance of the actuator is extracted and compared with the reference maintenance time interval. If the time interval from the last maintenance is greater than the reference maintenance time interval, a maintenance alarm signal is sent to the ship operator, and the ship operator performs maintenance on the actuator after receiving the signal; M3: Based on step M2, if the opening error value is still greater than the preset error threshold after maintenance is completed, step M4 is executed accordingly; M4: Obtain the historical processing times of each operator on the ship at the current time point, extract the number of successful processing times from the historical processing times of each operator, and calculate the proportion of successful processing times in the historical processing times to obtain the capability value Q1; Extract the time taken by each operator for each successful processing, calculate the average of the time taken for each processing, and thus obtain the efficiency value Q2 of each operator; Analyze the processing results of each operator corresponding to the number of successful processing times, and count the number of types of processing results as the experience value Q3 of each operator; The preset ability value Q1, efficiency value Q2 and experience value Q3 correspond to the ability passing value D1, efficiency passing value D2 and experience passing value D3 respectively; According to the formula , perform weighted calculation on the capability value Q1, efficiency value Q2 and experience value Q3 of each operator, so as to obtain the evaluation value Pa of each operator; where h1, h2 and h3 are the weighted influence factors corresponding to the capability value Q1, efficiency value Q2 and experience value Q3 respectively; The operator with the largest evaluation value Pa is selected as the processing personnel. After arriving at the site, the processing personnel determines the reason why the opening error value is still greater than the preset error threshold, and uses the determined reason as the processing result of this processing; M5: If the time interval from the last maintenance in step M2 is less than the reference maintenance time interval, then step M4 is also executed accordingly; M6: When the opening error value is greater than the preset error threshold, the difference between the two is calculated as the judgment difference, and the reason why it is greater than the preset error threshold is determined through steps M1 to M5. The judgment difference is used as the reference value, and the preset upper and lower fluctuation ranges are integrated to form the threshold fluctuation range corresponding to the current judgment reason and store it in a pre-constructed database. When the opening error value within a set time period is greater than the preset error threshold, the judgment difference is matched with each group of threshold fluctuation ranges in the database to obtain the corresponding judgment reason as the estimated reason and send it to the ship control center.

2. The intelligent control method for a ship electric control valve actuator according to claim 1 is characterized in that: Comprehensive evaluation of fluid pressure in real-time data, specifically: S1: After reaching the set sampling frequency, the fluid pressure corresponding to the fuel system within the set time period is collected; the fluid pressure value corresponding to the fuel system at each time point within the set time period is extracted, and then the average of the fluid pressure values ​​corresponding to the fuel system at each time point within the set time period is calculated to obtain the pressure evaluation value of the fuel system within the set time period; Preset respective groups of range intervals corresponding to the pressure evaluation values, and set each group of range intervals to correspond to a pressure index; match the pressure evaluation value of the fuel system within a set time period with the corresponding preset range interval, so as to obtain the corresponding pressure index; Obtain the current operating conditions of the ship's main engine, and set an ideal pressure index corresponding to different operating conditions; Get the ideal pressure index corresponding to the current ship's main engine.

3. The intelligent control method for a ship electric control valve actuator according to claim 2 is characterized in that: The specific steps to obtain the index difference Ki are: S2: Compare the pressure index of the fuel system within the set time period with the ideal pressure index. If the comparison results show the same, obtain the current valve opening value as the basic adjustment value; if the comparison results show different, further calculate the difference between the pressure index and the ideal pressure index to obtain the index difference K1 or K2, mark the pressure index and the ideal pressure index as u1 and u2 respectively, if u1>u2, obtain K1 through u1-u2, if u1<u2, obtain K2 through u2-u1; Identify the index difference between the current pressure index and the ideal pressure index; If the index difference is K1, then the index difference value ranges of each group of index difference K1 corresponding to each working condition are extracted from the pre-constructed database; if the index difference is K2, then the index difference value ranges of each group of index difference K2 corresponding to each working condition are extracted from the pre-constructed database; Set each group of index difference value ranges to correspond to a valve opening adjustment direction and adjustment value; Match the calculated index difference K1 or K2 with the corresponding index value range to obtain the corresponding valve adjustment direction and adjustment value; The current valve opening value is obtained, and the current valve opening value is calculated based on the obtained valve adjustment direction and adjustment value as a basic adjustment value.

4. The intelligent control method for a ship electric control valve actuator according to claim 3 is characterized in that: The specific steps to obtain the pressure change index Fc are: S3: extracting the fluid pressure value corresponding to the fuel system at each time point within the set time period. After the extraction is completed, a data pair of time point-fluid pressure value is formed starting from the starting time point, and the difference of the fluid pressure values ​​of adjacent time data pairs is calculated, that is, the fluid pressure value on the right side of the adjacent time data pair is subtracted from the fluid pressure value on the left side. If the difference calculated for a certain adjacent time data pair is a negative value, the absolute value of the group of differences is taken and marked as a pressure drop value. If the difference calculated for a certain adjacent time data pair is a positive value, the group of differences is marked as a pressure increase value. The calculated pressure drop value and pressure increase value are compared. If the pressure increase value is greater than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually increasing state within the set time period. If the pressure increase value is less than the pressure drop value, it is determined that the fluid pressure of the fuel system is in a gradually decreasing state within the set time period. Step S4 or S5 is executed accordingly based on the determination result. S4: If the determination result is a gradually rising state, then extract each group of pressure rise values ​​to calculate the pressure change rate corresponding to each group of pressure rise values, and calculate it by pressure rise value / unit time; preset three groups of change rate value ranges corresponding to the pressure change rate, set each group of change rate value ranges to correspond to a state interval, wherein the state interval includes a slow change interval, a medium change interval and a fast change interval; match each group of pressure change rates with the corresponding change rate value ranges, so as to obtain the state interval corresponding to each group of pressure change rates; Set a weight coefficient corresponding to each state interval, accumulate the unit time of each group of pressure change rates belonging to the same state interval, and obtain the pressure change duration of each state interval. Multiply the pressure change duration of each state interval by the corresponding weight coefficient, and then sum them to obtain the pressure change index Fc within the set time period; S5: If the determination result is a gradually decreasing state, the pressure change index Fc within the set time period is calculated similarly to step S4.

5. The intelligent control method for a ship electric control valve actuator according to claim 4 is characterized in that: Based on the index difference Ki and the pressure change index Fc, a corresponding adjustment signal is generated to the actuator, specifically: S6: respectively presetting the index value ranges of the pressure change index Fc corresponding to the gradually rising state and the gradually falling state, matching the pressure change index Fc within the set time period with the corresponding index value ranges of each group based on the result of the determination in step S3, setting each index value range to correspond to an opening optimization value: obtaining the opening optimization value within the set time period; The gradually rising state and the gradually falling state are set to correspond to a valve opening adjustment direction respectively, and the basic adjustment value in step S2 is adjusted based on the valve opening adjustment direction and the opening optimization value corresponding to the current judgment result, and the adjusted result is used as the target opening value of the valve at the current time point, and an adjustment signal is generated thereby.

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