A method for table voting of total temperature at the inlet of a fluidic pre-cooled engine

Abstract

The application belongs to the technical field of jet pre-cooling engine, and particularly relates to a jet pre-cooling engine inlet total temperature table voting method, which realizes high-precision measurement of the engine inlet temperature through detection voting of a slow-response waterproof sensor (3) and first and second ordinary waterproof sensors (1) and (2) respectively installed on the same sides of the slow-response waterproof sensor (3) and fusion compensation and rated compensation, and if there is a sensor fault or the like, different levels of degraded output are designed, although the control performance is reduced, but the safety of the aero-engine can be ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of jet pre-cooling engine, and particularly relates to a jet pre-cooling engine inlet total temperature voting method. BACKGROUND

[0002] In recent years, a large number of researches have been carried out on the jet pre-cooling expansion line of a turbine engine at home and abroad, that is, a water spraying pre-cooling device is installed in an air inlet duct, and atomized liquid water is sprayed into the air inlet duct, so that the water evaporation absorbs heat and reduces the engine inlet total temperature.

[0003] Taking a certain section of the air inlet duct as an example, an ordinary waterproof inlet total temperature sensor is installed in a counterclockwise 30° direction with the center axis as the center, two branches are evenly distributed in the circumferential direction, a high-strength and slow-response waterproof inlet total temperature sensor is installed in a counterclockwise 45° direction, two branches are evenly distributed in the circumferential direction, an ordinary waterproof inlet total temperature sensor is installed in a counterclockwise 60° direction, and two branches are evenly distributed in the circumferential direction, a total of six inlet total temperature sensors.

[0004] After the jet pre-cooling is turned on, the water vapor content in the turbine engine air inlet duct is high, the resistance of the ordinary platinum resistance inlet total temperature sensor is affected by the water vapor, the resistance is low, and the measurement is inaccurate. If a waterproof sensor is used, the dynamic response is slow, the measured temperature lags, and the control is obviously affected. Domestic non-similar redundancy sensors are used for compensation, but there is no redundancy voting method, once the sensor fails, the compensation method is invalid, and the temperature acquisition accuracy is obviously deteriorated. This further leads to deviation of the control plan related to the engine inlet total temperature sensor, and the engine key parameters cannot be accurately converted. SUMMARY

[0005] In order to solve the above problems, the application provides a jet pre-cooling engine inlet total temperature voting method, which is characterized by comprising:

[0006] The sensing device installed at the same axial position of the air inlet duct is voted, and the sensing device comprises: two groups of circumferentially distributed temperature sensors, each group of temperature sensors comprises a slow-response waterproof sensor (3) and a first ordinary waterproof sensor (1) and a second ordinary waterproof sensor (2) installed on both sides of the slow-response waterproof sensor (3) respectively;

[0007] The voting method comprises:

[0008] Step S1:

[0009] The channel signal of the first ordinary waterproof sensor (1) is subjected to BIT detection to obtain a first state signal,

[0010] The channel signal of the second ordinary waterproof sensor (2) is subjected to BIT detection to obtain a second state signal,

[0011] The BIT detection on the slow-response waterproof sensor (3) obtains a third state signal;

[0012] Step S2: Taking the first measurement signal of the first normal waterproof sensor (1) as an input signal, a first boundary signal of an extreme value detection output result is obtained; the first measurement signal is subjected to fault judgment to obtain a first measurement signal health state;

[0013] Taking the second measurement signal of the second normal waterproof sensor (2) as an input signal, a second boundary signal of an extreme value detection output result is obtained; the second measurement signal is subjected to fault judgment to obtain a second measurement signal health state;

[0014] Taking the third measurement signal of the third normal waterproof sensor (3) as an input signal, a third boundary signal of an extreme value detection output result is obtained; the third measurement signal is subjected to fault judgment to obtain a third measurement signal health state;

[0015] Step S3: The difference between the first measurement signal and the second measurement signal is taken as a cross-channel detection signal, and the cross-channel detection signal is subjected to fault judgment to obtain a cross-channel detection signal health state;

[0016] Step S4:

[0017] The first state signal, the second state signal, the third state signal, the first boundary signal, the second boundary signal, and the third boundary signal are respectively integrated to obtain integral values, and fault judgment is performed on the corresponding state signals and boundary signals according to the integral values to obtain health states of the state signals and the boundary signals;

[0018] The health states of the waterproof sensors are determined according to the health states of the state signals and the corresponding boundary signals; specifically, the first state signal is subjected to fault integration to obtain a first state signal integral value, and the first state signal integral value is subjected to fault judgment to obtain a first state signal integral value health state;

[0019] The second state signal is subjected to fault integration to obtain a second state signal integral value, and the second state signal integral value is subjected to fault judgment to obtain a second state signal integral value health state;

[0020] The third state signal is subjected to fault integration to obtain a third state signal integral value, and the third state signal integral value is subjected to fault judgment to obtain a third state signal integral value health state;

[0021] The first boundary signal is subjected to fault integration to obtain a first boundary signal integral value, and the first boundary signal integral value is subjected to fault judgment to obtain a first boundary signal integral value health state;

[0022] The second defined signal is fault integrated to obtain a second defined signal integral value, and the second defined signal integral value is fault judged to obtain a second defined signal integral value health state;

[0023] The third defined signal is fault integrated to obtain a third defined signal integral value, and the third defined signal integral value is fault judged to obtain a third defined signal integral value health state;

[0024] The first state signal integral value health state and the first defined signal integral value health state are verified state voted to obtain a first logic state health state of the first normal waterproof sensor (1);

[0025] The second state signal integral value health state and the second defined signal integral value health state are verified state voted to obtain a second logic state health state of the second normal waterproof sensor (2);

[0026] The third state signal integral value health state and the third defined signal integral value health state are verified state voted to obtain a third logic state health state of the third normal waterproof sensor (3).

[0027] Step S5:

[0028] Based on the cross-channel detection signal health state, the first logic state health state and the second logic state health state, a measurement voting output signal of the normal waterproof sensor and default value state information are voted;

[0029] Step 6: The measurement voting output signal of the normal waterproof sensor is filtered to obtain a filtered measurement voting output signal of the normal waterproof sensor;

[0030] The third measurement signal is filtered to obtain a filtered third measurement signal;

[0031] Step 7: The filtered measurement voting output signal of the normal waterproof sensor and the filtered third measurement signal are fused and compensated to obtain a fusion compensation signal of the normal waterproof sensor;

[0032] Step 8: The filtered third measurement signal is rated compensated to obtain a third measurement signal rated compensation signal;

[0033] Step 9: Based on the third defined signal integral value health state and the default value state information, a measurement voting output signal of the slow response waterproof sensor is voted out, and the measurement voting output signal of the slow response waterproof sensor includes: the fusion compensation signal of the normal waterproof sensor, the third measurement signal rated compensation signal, the filtered measurement voting output signal of the normal waterproof sensor, and a last recorded available value of the slow response waterproof sensor (3) before failure.

[0034] Preferably, the method for obtaining the health status of the first measurement signal comprises: determining the health status of the first measurement signal as failure when the first measurement signal exceeds the range determination threshold; determining the health status of the first measurement signal as healthy when the first measurement signal returns to the normal range; the method for obtaining the health status of the second measurement signal comprises: determining the health status of the second measurement signal as failure when the second measurement signal exceeds the range determination threshold; determining the health status of the second measurement signal as healthy when the second measurement signal returns to the normal range; the method for obtaining the health status of the third measurement signal comprises: determining the health status of the third measurement signal as failure when the third measurement signal exceeds the range determination threshold; determining the health status of the third measurement signal as healthy when the third measurement signal returns to the normal range.

[0035] Preferably, the method for determining the failure of the cross-channel detection signal comprises: determining the health status of the cross-channel detection signal as failure when the cross-channel detection signal exceeds the set threshold; the health status of the cross-channel detection signal is initially determined as healthy by default.

[0036] Preferably, when the health status of the first state signal integral value and the health status of the first defined signal integral value are both healthy, the health status of the first logic state is healthy, otherwise the health status of the first logic state is failure;

[0037] When the health status of the second state signal integral value and the health status of the second defined signal integral value are both healthy, the health status of the second logic state is healthy, otherwise the health status of the second logic state is failure;

[0038] When the health status of the third state signal integral value and the health status of the third defined signal integral value are both healthy, the health status of the third logic state is healthy, otherwise the health status of the third logic state is failure.

[0039] Preferably, the method for obtaining the health status of each state signal and defined signal comprises:

[0040] Determining the health status of each cycle of each state signal and defined signal; when the health status is healthy, positive integral is performed, otherwise negative integral is performed.

[0041] Preferably, the specific voting method of step S5 comprises:

[0042] When the health status of the cross-channel detection signal is healthy, the health status of the first logic state and the health status of the second logic state are both healthy, and the measurement voting output signal of the ordinary waterproof sensor is the average of the first measurement signal and the second measurement signal.

[0043] When the cross-channel detection signal health status is healthy, and only one of the first logic state health status and the second logic state health status is healthy, the measurement voting output signal of the normal waterproof sensor is the measurement signal corresponding to the normal waterproof sensor;

[0044] When the cross-channel detection signal health status is healthy, and both the first logic state health status and the second logic state health status are faulty, the measurement voting output signal of the normal waterproof sensor is the last recorded available value before the fault;

[0045] When the cross-channel detection signal health status is faulty, and both the first logic state health status and the second logic state health status are faulty, the measurement voting output signal of the normal waterproof sensor is the last recorded available value before the fault;

[0046] When the cross-channel detection signal health status is faulty, and both the first logic state health status and the second logic state health status are healthy, the measurement voting output signal of the normal waterproof sensor is the maximum value of the first measurement signal and the second measurement signal;

[0047] When the cross-channel detection signal health status is faulty, and only one of the first logic state health status and the second logic state health status is healthy, the measurement voting output signal of the normal waterproof sensor is the measurement signal corresponding to the normal waterproof sensor;

[0048] When both the first logic state health status and the second logic state health status are faulty, the default value state information is T, otherwise it is F.

[0049] Preferably, step 9 specifically includes the following voting methods:

[0050] When the third defined signal integral value health status is healthy, and the default value state is F, the measurement voting output signal of the slow-response waterproof sensor is the fusion compensation signal of the normal waterproof sensor;

[0051] When the third defined signal integral value health status is healthy, and the default value state is T, the measurement voting output signal of the slow-response waterproof sensor is the third measurement signal rated compensation signal

[0052] When the third defined signal integral value health status is faulty, and the default value state is F, the measurement voting output signal of the slow-response waterproof sensor is the measurement voting output signal of the filtered normal waterproof sensor

[0053] When the third defined signal integral value health status is faulty, and the default value state is T, the measurement voting output signal of the slow-response waterproof sensor is the last recorded available value of the slow-response waterproof sensor (3) before the fault.

[0054] The advantages of the present application include: through voting on fusion compensation, rated compensation and common waterproof sensor. High-precision measurement of engine inlet temperature is realized, and if there is sensor failure or the like, different levels of degraded output are designed, although the control performance will be reduced, but the safety of the aero-engine can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a preferred embodiment sensor arrangement of the present application. DETAILED DESCRIPTION

[0056] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further clearly, completely and specifically described below in combination with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, for the purpose of description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the general design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0057] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present application should be the general meaning understood by the general technical personnel in the field to which the present application belongs. The words indicating the relative direction or position relationship, such as "up", "down", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like used in the description of the present application, are only used to indicate the relative direction or position relationship, and not to imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the described object changes, the relative position relationship may also change accordingly, therefore it cannot be understood as a limitation on the present application. The "first", "second", "third" and the like used in the description of the present application are only for the purpose of description, and are used to distinguish different components, and cannot be understood as indicating or implying relative importance. The "one", "a" or "the" and the like used in the description of the present application should not be understood as an absolute limitation on the quantity, but should be understood as the existence of at least one. The "include" or "contain" and the like used in the description of the present application mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects.

[0058] In addition, it needs to be explained that, unless otherwise explicitly specified and limited, the "installation", "connection", "connection" and similar words used in the description of the application should be understood broadly, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate media, or the internal communication of two elements, and those skilled in the art can understand its specific meaning in the application according to the specific circumstances.

[0059] As shown in Figure 1 For voting on the sensing device installed at the same axial position of the inlet pipe, the sensing device comprises two groups of circumferentially distributed temperature sensors, each group of the temperature sensors comprises a slow response waterproof sensor (3) and a first common waterproof sensor (1) and a second common waterproof sensor (2) installed on both sides of the slow response waterproof sensor (3) respectively;

[0060] The block voting method is adopted, first, the upper left three sensors are voted, and the right lower three sensors are voted in the same way. Because the temperature field is distorted obviously due to the jet precooling, the upper left temperature sensor and the right lower temperature sensor are no longer voted, but according to the specific control plan, the upper left voting value or the right lower voting value is selected alone.

[0061] Table 1 parameter name and meaning

[0062]

[0063]

[0064] Step 1:

[0065] The T2_1_A and T2_1_B measurement circuits need to be BIT detected, and T2_1_A_status and T2_1_B_status are obtained respectively.

[0066] The T2D_A measurement circuit needs to be BIT detected, and T2D_A_status is obtained.

[0067] Step 2:

[0068] The extreme value detection takes the T2 measurement signal (T2_1_measurement_A, T2_1_measurement_B) as input, and outputs the detection result (T2_1_A_range_status, T2_1_B_range_status) after detection.

[0069] The extreme value detection takes the T2D measurement signal (T2D_measurement_A) as input, and outputs the detection result (T2D_A_range_status) after detection.

[0070] Detection method:

[0071] The input signal is subjected to parameter range determination. When the range determination threshold is exceeded, it is determined that an extreme value fault has occurred, and the extreme value fault flag is set to "Faulty", indicating that an extreme value fault has occurred. When the signal returns to the normal range, the extreme value fault flag is set to "Healthy". The extreme value fault flag is initially defaulted to "Healthy".

[0072] When Sig_Minbelt≤Sig_measurement≤Sig_Maxbelt, set

[0073] Sig_range_status is set to "Health";

[0074] When Sig_measurement<Sig_Minbelt or Sig_measurement>Sig_Maxbelt, set Sig_range_status to "Faulty".

[0075] Step 3:

[0076] The cross-channel detection takes the T2_1 measurement signal (T2_1_measurement_A, T2_1_measurement_B) as input, and outputs the detection result (T2_1_cross_check_status) after detection.

[0077] Detection method:

[0078] The two-channel measurement values of the same signal are compared. When the signal difference between the two channels is within the set threshold range, it is considered that the two-channel cross detection is normal, and the cross-channel fault flag is set to "Health". When the signal difference exceeds the set threshold, the cross-channel fault flag is set to "Faulty". The cross-channel fault flag is initially defaulted to "Healthy".

[0079] When |Sig_measurement_A-Sig_measurement_B|≤Sig_cross_CP, set

[0080] Sig_cross_faulty_flag is set to "Healthy";

[0081] When |Sig_measurement_A - Sig_measurement_B| > Sig_cross_CP, Sig_cross_CP_flag is set to "Faulty".

[0082] Sig_cross_faulty_flag is set to "Faulty".

[0083] Step 4:

[0084] The fault integration is performed on the BIT detection result and the extreme value detection result of the T2_1 signal respectively.

[0085] The fault integration takes the BIT detection result and the extreme value detection result (T2_1_A_status, T2_1_B_status, T2_1_A_range_status, T2_1_B_range_status) of the T2_1 signal as input, and outputs (T2_1_A_status_FI, T2_1_B_status_FI, T2_1_A_range_FI, T2_1_B_range_FI) after integration. Table 2 T2_1_A verification state voting logic

[0086]

[0087] Table 3 T2_1_B channel verification state voting logic

[0088]

[0089] The fault integration is performed on the BIT detection result and the extreme value detection result of the T2D_A signal respectively.

[0090] The fault integration takes the BIT detection result and the extreme value detection result (T2D_A_status, T2D_A_range_status) of the T2D_A signal as input, and outputs (T2D_A_status_FI, T2D_A_range_FI) after integration.

[0091] Table 4 T2D_A channel verification state voting logic

[0092]

[0093] Detection method:

[0094] The input parameter is a certain fault information. When the input fault information is "Health", it is considered that there is no fault information, and when the input is "Faulty", it is considered that there is fault information. When there is fault information, the positive integration is performed, and when there is no fault information, the negative integration is performed. According to the fault information of each cycle input parameter, the integration is accumulated, and when the integration value exceeds the set threshold value, the fault is determined. In the initialization, the fault integration value is set to 0.

[0095] When the fault information is "Health", the fault integral value is reduced on the basis of the last cycle

[0096] IntegFaulty_step_dec;

[0097] When the fault information is "Faulty", the fault integral value is increased on the basis of the last cycle

[0098] IntegFaulty_step_add;

[0099] The integral value is denoted as C_Integ, and if the integral value reaches the determination threshold IntegFaulty_CP, the corresponding information is given.

[0100] Note: When the integral value is negative, it is cleared to 0, and the fault integral state is "Health"; when the integral value is not 0 and less than the determination threshold, the fault integral state is kept as the previous value; when the integral value exceeds the threshold, the fault integral state is "Faulty".

[0101] Step 5: According to the cross-channel verification state and the channel verification state, the T2_1 signal is voted. T2_1_default is the last recorded available value before the fault. The output after the truth table voting is

[0102] T2_1_selected_H and the default value state information T2_1_default_status.

[0103] Table 5 Truth table

[0104]

[0105]

[0106] Step 6:

[0107] The voted T2_1_selected_H signal is filtered according to the inertial filtering algorithm, and the filtering coefficient is 0.2, which can be adjusted. T2_1_selected_H is filtered to obtain T2_1_select_FL.

[0108] The T2D_measurement_A signal is filtered according to the inertial filtering algorithm, and the filtering coefficient is 0.2, which can be adjusted. T2D_measurement_A is filtered to obtain T2D_measurement_A_FL.

[0109] Filtering method:

[0110] Inertial filtering formula: X_fil(k) = aX(k) + (1-a)X_fil(k-1); wherein X_fil(k), X_fil(k-1) are the filtered parameter values of the current period and the previous period; X(k) is the unfiltered parameter value of the current period; a is the filtering coefficient, 0≤a≤1. Initialization, i.e. k = 1, X_fil(1) = X(k), k is counted from 1.

[0111] Step 7:

[0112] The T2D_measurement_A_FL / T2_1_select_FL signal is compensated according to the transfer function

[0113] H(s) = (k1_A*s+1)(k3_A*s+1) / (k2_A*s+1) fusion compensation to obtain T2D_measurement_A_FL_comp1, the compensation coefficient is adjustable.

[0114] Table 5 fusion compensation coefficient

[0115] M k1_A k2_A k3_A 0 10 10 0 0.5 10 10 0 1 10 10 0 1.5 10 10 0 2 10 10 0 2.5 10 10 0 3 10 10 0

[0116] Step 8:

[0117] The T2D_measurement_A_FL signal is compensated according to the transfer function H(s) = (k1_a*s+1)(k3_a*s+1) / (k2_a*s+1) to obtain T2D_measurement_A_FL_comp2, and the compensation coefficient is adjustable.

[0118] Table 6 compensation coefficient

[0119] M k1_a k2_a k3_a 0 1 0.05 0 0.5 1 0.05 0 1 1 0.05 0 1.5 1 0.05 0 2 1 0.05 0 2.5 1 0.05 0 3 1 0.05 0

[0120] Step 9:

[0121] The T2D_A signal is voted. T2D_A_default is the last recorded available value before the fault.

[0122] Table 7 output voting

[0123]

[0124] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining the total inlet temperature of a jet-precooled engine, characterized in that, include: Used to vote on a sensing device installed at the same axial position in the intake manifold, the sensing device includes: two sets of circumferentially distributed temperature sensors, each set of temperature sensors including a slow-response waterproof sensor (3) and a first ordinary waterproof sensor (1) and a second ordinary waterproof sensor (2) installed on both sides of the slow-response waterproof sensor (3). The voting methods include: Step S1: The first state signal is obtained by performing BIT detection on the channel signal of the first ordinary waterproof sensor (1). The second state signal is obtained by performing BIT detection on the channel signal of the second ordinary waterproof sensor (2). The third state signal is obtained by performing BIT detection on the slow-response waterproof sensor (3); Step S2: Using the first measurement signal of the first ordinary waterproof sensor (1) as the input signal, obtain the first defining signal of the extreme value detection output result; perform fault judgment on the first measurement signal to obtain the health status of the first measurement signal; Using the second measurement signal of the second ordinary waterproof sensor (2) as the input signal, a second defining signal of the extreme value detection output result is obtained; the second measurement signal is used to determine the fault status of the second measurement signal; Using the third measurement signal of the third ordinary waterproof sensor (3) as the input signal, the third defining signal of the extreme value detection output result is obtained; the third measurement signal is used to determine the fault status of the third measurement signal; Step S3: The difference between the first measurement signal and the second measurement signal is used as the cross-channel detection signal. Fault judgment is performed on the cross-channel detection signal to obtain the health status of the cross-channel detection signal. Step S4: The first state signal, the second state signal, the third state signal, the first boundary signal, the second boundary signal, and the third boundary signal are integrated to obtain the integral value. Based on each integral value, the corresponding state signal and boundary signal are judged for faults to obtain the health status of each state signal and boundary signal. The logic state and health status of each waterproof sensor are determined based on the health status of each status signal and its corresponding definition signal. Step S5: Voting is performed based on the health status of the cross-channel detection signal, the health status of the first logic state, and the health status of the second logic state to obtain the measurement voting output signal and default value status information of the ordinary waterproof sensor. Step 6: Filter the measurement voting output signal of the ordinary waterproof sensor to obtain the filtered measurement voting output signal of the ordinary waterproof sensor; The third measurement signal is filtered to obtain the filtered third measurement signal; Step 7: Perform fusion compensation on the filtered measurement output signal of the ordinary waterproof sensor and the filtered third measurement signal to obtain the fusion compensation signal of the ordinary waterproof sensor; Step 8: Perform rated compensation on the filtered third measurement signal to obtain the rated compensated signal of the third measurement signal; Step 9: Based on the health status of the integrated value of the third defining signal and the status information of the default value, the measurement voting output signal of the slow response waterproof sensor is voted out. The measurement voting output signal of the slow response waterproof sensor includes: the fusion compensation signal of the ordinary waterproof sensor, the rated compensation signal of the third measurement signal, the measurement voting output signal of the ordinary waterproof sensor after filtering, and the last available value recorded before the failure of the slow response waterproof sensor (3). The method for fault diagnosis of cross-channel detection signals includes: when the cross-channel detection signal exceeds a set threshold, the health status of the cross-channel detection signal is faulty; the initial default health status of the cross-channel detection signal is healthy. When both the health status of the first state signal integral value and the health status of the first boundary signal integral value are healthy, the health status of the first logic state is healthy; otherwise, the health status of the first logic state is faulty. When both the health status of the second state signal integral value and the health status of the second boundary signal integral value are healthy, the health status of the second logic state is healthy; otherwise, the health status of the second logic state is faulty. When both the health status of the third state signal integral value and the health status of the third boundary signal integral value are healthy, the health status of the third logic state is healthy; otherwise, the health status of the third logic state is faulty. The specific voting method for step S5 includes: When the cross-channel detection signal is healthy, and both the first logic state and the second logic state are healthy, the measurement voting output signal of the ordinary waterproof sensor is the average of the first measurement signal and the second measurement signal. When the cross-channel detection signal is healthy, and only one of the first logic state health state and the second logic state health state is healthy, the measurement voting output signal of the ordinary waterproof sensor is the measurement signal corresponding to the ordinary waterproof sensor. When the cross-channel detection signal is healthy, and both the first logic state health status and the second logic state health status are faulty, the measurement voting output signal of the ordinary waterproof sensor is the last recorded usable value before the fault. When the cross-channel detection signal health status is faulty, and both the first logic state health status and the second logic state health status are faulty, the measurement voting output signal of the ordinary waterproof sensor is the last recorded usable value before the fault. When the cross-channel detection signal health status is faulty, and both the first logic state health status and the second logic state health status are healthy, the measurement voting output signal of the ordinary waterproof sensor is the maximum value of the first measurement signal and the second measurement signal. When the cross-channel detection signal health status is faulty, and only one of the first logic state health status and the second logic state health status is healthy, the measurement voting output signal of the ordinary waterproof sensor is the measurement signal corresponding to the ordinary waterproof sensor. When both the first logical state health status and the second logical state health status are faulty, the default value status information is T; otherwise, it is F. Step 9 includes the following specific voting methods: When the third defining signal integral value is in a healthy state, and the default value state is F, the measurement voting output signal of the slow response waterproof sensor is the fusion compensation signal of the ordinary waterproof sensor. When the third defining signal integral value is in a healthy state, and the default value state is T, the measurement voting output signal of the slow response waterproof sensor is the third measurement signal rated compensation signal. When the third defining signal integral value indicates a faulty health status, and the default value is F, the measurement voting output signal of the slow-response waterproof sensor is the filtered measurement voting output signal of the ordinary waterproof sensor. When the health status of the third defining signal integral value is faulty, and the default value status is T, the measurement voting output signal of the slow response waterproof sensor is the last available value recorded by the slow response waterproof sensor (3) before the fault.

2. The jet precooling engine inlet total temperature determination method as described in claim 1, characterized in that, The method for obtaining the health status of a first measurement signal includes: determining the health status of the first measurement signal as faulty when the first measurement signal exceeds a range determination threshold; and determining the health status of the first measurement signal as healthy when the first measurement signal returns to the normal range. The method for obtaining the health status of a second measurement signal includes: determining the health status of the second measurement signal as faulty when the second measurement signal exceeds a range determination threshold; and determining the health status of the second measurement signal as healthy when the second measurement signal returns to the normal range. The method for obtaining the health status of a third measurement signal includes: determining the health status of the third measurement signal as faulty when the third measurement signal exceeds a range determination threshold; and determining the health status of the third measurement signal as healthy when the third measurement signal returns to the normal range.

3. The jet precooling engine inlet total temperature determination method as described in claim 1, characterized in that, The health status obtained from each state signal and the boundary signal includes: Determine the health status of each state signal and define the health status of each cycle of the signal; when the health status is healthy, perform positive integration, otherwise perform negative integration.

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