An intake duct flap position monitoring method and system

Abstract

The present invention provides a method for monitoring the position of an air intake duct flap, and the method includes the following steps: S1: Monitor the angle of the air intake duct flap; S2: Adjust the air intake duct flap to different opening degrees, and then record the angles corresponding to different opening degrees to obtain multiple data sets of opening degrees and angles; S3: According to the monitoring results obtained in S1 and the multiple data sets obtained in S2, periodically calculate the position information of the air intake duct flap. The present invention proposes a method for monitoring the position of an air intake duct flap. By applying a high-precision synchronous angle machine-digital converter and a calibration algorithm, the accuracy of monitoring the position of the air intake duct flap is improved, and the problem of monitoring error of the air intake duct flap in the prior art is solved.

Description

Technical Field

[0001] The present invention belongs to the field of airborne electromechanical integrated control and management, and particularly relates to a method and system for monitoring the position of an air intake duct flap. Background Art

[0002] The aircraft electromechanical system is a necessary and fundamental condition for ensuring the functions of the aircraft. The electromechanical system directly affects the overall performance of the aircraft, and at the same time has an important impact on the reliability, economy and safety of the aircraft. Among them, monitoring the position of the air intake duct flap is one of the important tasks of the electromechanical management subsystem. When the pilot controls the action of the air intake duct flap in the cockpit, he judges whether the operation is executed in time by observing the graphical interface of the air intake duct flap angle and the air intake duct flap opening. In the existing methods for monitoring the position of the air intake duct flap, there are errors in the conversion link of the plate position sensor and the acquisition link of the monitoring platform, which cannot be eliminated; and fixed formulas are used, and the opening of the air intake duct flap is calculated according to the air intake duct flap angle, ignoring the position deviation of the air intake duct flap during installation and the individual differences between different batches of air intake duct flaps. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention proposes a method for monitoring the position of an air intake duct flap based on a high-precision synchronous angular machine - digital converter, which adopts a calibration algorithm. Compared with the traditional method for monitoring the position of the air intake duct flap, the monitoring accuracy has been significantly improved.

[0004] The purpose of the present invention is to provide a method for monitoring the position of an air intake duct flap, and the method includes the following steps:

[0005] S1: Monitor the angle of the air intake duct flap;

[0006] S2: Adjust the air intake duct flap to different openings, and then record the corresponding angles for different openings to obtain multiple data groups of openings and angles;

[0007] S3: According to the monitoring results obtained in S1 and the multiple data groups obtained in S2, periodically calculate the position information of the air intake duct flap.

[0008] The method for monitoring the position of the air intake duct flap provided by the present invention also has the following characteristics. The S1 includes:

[0009] S1.1: Obtain the three-phase AC signal of the air intake duct flap angle through the plate position sensor;

[0010] S1.2: Filter the above three-phase AC signal;

[0011] S1.3: Calculate the filtered signal to obtain 12-bit parallel data;

[0012] S1.4: Resolve the above twelve-bit parallel data into inlet guide vane angle data.

[0013] The inlet guide vane position monitoring method provided by the present invention further has the following feature. S2 includes:

[0014] S2.1: Adjust the inlet guide vane to a position with an opening degree of X;

[0015] S2.2: Collect the inlet guide vane angle when the inlet guide vane is at the X position to obtain a corresponding data set of the inlet guide vane angle and the opening degree;

[0016] S2.3: Repeat the above S2.1 - S2.2 to obtain multiple corresponding data sets of the inlet guide vane angle and the opening degree.

[0017] Among them, X is any opening degree value from 15% to 100%.

[0018] The inlet guide vane position monitoring method provided by the present invention further has the following feature. S2 further includes the judgment of the calibration of multiple data sets. If the multiple data sets are linearly increasing, the calibration is successful; if the multiple data sets do not show a linearly increasing relationship, the calibration fails, and it is necessary to repeat S2.1 - S2.3 for re - calibration.

[0019] The inlet guide vane position monitoring method provided by the present invention further has the following feature. The number of data sets corresponding to the inlet guide vane angle and the opening degree is at least 5.

[0020] The inlet guide vane position monitoring method provided by the present invention further has the following feature. S3 includes:

[0021] S3.1: Form a data comparison table from the multiple data sets of the inlet guide vane angle and the opening degree obtained in S2;

[0022] S3.2: Collect the inlet guide vane angle;

[0023] S3.3: Search in the comparison table formed in S3.1 and select the data sets corresponding to the two angle values closest to the inlet guide vane angle;

[0024] S3.4: Perform interval linear solution according to the two data sets selected in S3.3 to obtain the inlet guide vane opening degree, that is, obtain the inlet guide vane position information.

[0025] Another object of the present invention is to provide an inlet guide vane position monitoring system, and the system is used to implement the method described in any one of the above.

[0026] Compared with the prior art, the beneficial effects of the present invention:

[0027] The present invention provides a method for monitoring the position of an air intake duct flap. By applying a high-precision synchronous angle machine - digital converter and a calibration algorithm, the accuracy of monitoring the position of the air intake duct flap is improved, and the problem of monitoring error of the air intake duct flap in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a flowchart of the method for monitoring the position of the air intake duct flap provided by the present invention;

[0030] Figure 2 It is a block diagram of the system for monitoring the position of the air intake duct flap provided by the present invention;

[0031] Figure 3 It is a schematic diagram of the opening calibration process in the method for monitoring the position of the air intake duct flap provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following embodiments will specifically describe the monitoring method provided by the present invention in conjunction with the drawings.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] The terms "installed", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this invention can be understood according to specific circumstances.

[0036] As Figures 1-3 shown, a method for monitoring the position of the inlet duct flap is provided, and the method includes the following steps:

[0037] S1: Monitor the angle of the inlet duct flap:

[0038] S1.1: Obtain the three-phase AC signal of the angle of the inlet duct flap through the plate position sensor;

[0039] S1.2: Perform filtering processing on the above three-phase AC signal;

[0040] S1.3: Calculate the filtered signal to obtain 12-bit parallel data;

[0041] S1.4: Calculate the above 12-bit parallel data into the angle data of the inlet duct flap;

[0042] Specifically, as Figure 2 shown, the plate position sensor is a synchro, which can convert the angle of the inlet flap into a three-phase AC signal of 36V / 400Hz. The phase difference between the three-phase signals corresponds one-to-one with the angle of the inlet duct flap. The electromechanical management computer collects the above three-phase AC signals, and the high-precision synchro-to-digital converter inside converts the phase difference between the three-phase signals into an angle and outputs the angle in the format of 12-bit parallel data. The application software of the electromechanical management computer is responsible for calculating the parallel data into the angle of the inlet duct flap and sending the calculation result to the avionics display through the RS-422A bus.

[0043] S2: Adjust the inlet duct flap to different opening degrees, and then record the corresponding angles of different opening degrees to obtain multiple data groups of opening degrees and angles:

[0044] S2.1: Adjust the inlet duct flap to the position with an opening degree of X;

[0045] S2.2: Collect the angle of the inlet duct flap when the inlet duct flap is at the X position to obtain the corresponding data group of the inlet duct flap angle and the opening degree;

[0046] S2.3: Repeat the above S2.1 - S2.2 to obtain multiple data groups corresponding to the inlet duct flap angle and the opening degree;

[0047] S2.4: Judgment on the calibration of multiple data groups. If there is a linear increase among multiple data groups, the calibration is successful; if there is no linear increase relationship among multiple data groups, the calibration fails and it is necessary to repeat S2.1 - S2.3 for re - calibration.

[0048] Among them, the X is any opening value from 15% to 100%.

[0049] In this embodiment, first, manually adjust the intake air duct flap to the position of 15%. The avionics equipment sends a 15% calibration instruction to the electromechanical management computer. After receiving the calibration instruction, the electromechanical management computer corresponds the currently collected intake air duct flap angle with the 15% opening and stores it in the internal NVSRAM in the form of a variable. Then, in the same way, calibrate the flap openings of 31%, 62%, 81.5%, and 100% respectively. Finally, judge whether the flap angles collected by the electromechanical management computer show a linear increase relationship when the flap openings are 15%, 31%, 62%, 81.5%, and 100% respectively. If so, it is considered that the calibration is successful, and the electromechanical management computer feeds back "calibration successful" to the avionics through the RS - 422A bus. If not, it is considered that the calibration fails, and the electromechanical management computer feeds back "calibration failed" to the avionics through the RS - 422A bus. After the ground crew checks and eliminates possible problems, re - calibrate until the calibration is successful.

[0050] S3: According to the monitoring results obtained in S1 and the multiple data groups obtained in S2, periodically calculate the intake air duct flap position information:

[0051] S3.1: Form a data comparison table with the multiple data groups of the intake air duct flap angles and openings obtained in S2;

[0052] S3.2: During normal operation, the electromechanical management computer collects the intake air duct flap angle;

[0053] S3.3: Search in the comparison table formed in S3.1 to find between which two flap angles this angle is in the above - mentioned data comparison table, perform interval linear solution, and select the data groups corresponding to the two angle values closest to the intake air duct flap angle;

[0054] S3.4: Perform interval linear solution according to the two data groups selected in S3.3 to obtain the intake air duct flap opening, that is, obtain the intake air duct flap position information, and upload this parameter to the avionics display through the RS - 422A bus.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An intake duct flap position monitoring method, characterized in that, the method comprises the following steps: S1: Monitor the angle of the intake duct flap; S2: Adjust the intake duct flap to different opening degrees, and then record the angles corresponding to different opening degrees to obtain multiple data groups of opening degrees and angles; S3: According to the monitoring results obtained in S1 and the multiple data groups obtained in S2, periodically calculate the position information of the intake duct flap, wherein S1 includes: S1.1: Obtain the three-phase AC signal of the intake duct flap angle through a plate position sensor; S1.2: Perform filtering processing on the above three-phase AC signal; S1.3: Calculate the filtered signal to obtain 12-bit parallel data; S1.4: Calculate the above 12-bit parallel data into the intake duct flap angle data.

2. The intake duct flap position monitoring method according to claim 1, characterized in that, S2 includes: S2.1: Adjust the intake duct flap to a position with an opening degree of X; S2.2: Collect the intake duct flap angle when the intake duct flap is at the X position to obtain the corresponding data group of the intake duct flap angle and the opening degree; S2.3: Repeat the above S2.1 - S2.2 to obtain multiple corresponding data groups of the intake duct flap angle and the opening degree, wherein X is any opening degree value from 15% to 100%.

3. The intake duct flap position monitoring method according to claim 2, characterized in that, S2 further includes the judgment of the calibration of multiple data groups. If the multiple data groups are linearly increasing, the calibration is successful; if the multiple data groups do not show a linearly increasing relationship, the calibration fails and it is necessary to repeat S2.1 - S2.3 for re-calibration.

4. The intake duct flap position monitoring method according to claim 2 or 3, characterized in that, the number of corresponding data groups of the intake duct flap angle and the opening degree is at least 5.

5. The intake duct flap position monitoring method according to claim 1, characterized in that, S3 includes: S3.1: Form a data comparison table from the multiple data groups of the intake duct flap angle and the opening degree obtained in S2; S3.2: Collect the intake duct flap angle; S3.3: Search in the comparison table formed in S3.1 and select the data groups corresponding to the two angle values closest to the intake duct flap angle; S3.4: Perform interval linear solution according to the two data groups selected in S3.3 to obtain the intake duct flap opening degree, that is, obtain the intake duct flap position information.

6. An intake duct flap position monitoring system, characterized in that, the system is used to implement the method according to any one of claims 1 - 5.

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