CN107817006B - Self-detection method of attack angle sensor - Google Patents
Self-detection method of attack angle sensor Download PDFInfo
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- CN107817006B CN107817006B CN201711243689.0A CN201711243689A CN107817006B CN 107817006 B CN107817006 B CN 107817006B CN 201711243689 A CN201711243689 A CN 201711243689A CN 107817006 B CN107817006 B CN 107817006B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Abstract
The invention discloses a self-detection method of an attack angle sensor, and belongs to the technical field of sensor detection. The method comprises the following steps: step one, detecting whether an acquisition interface of a controller is normal; if the result is normal, performing the step two; otherwise, recording the fault of the acquisition interface; step two, detecting whether the sum of the output signals of the sensors is normal; if the result is normal, performing the third step; otherwise, recording the sum fault; step three, detecting whether the output signal and the sum value of the sensor at the limit position are normal; if the result is normal, performing the fourth step; if not, recording the output signal fault and the sum value fault of the sensor; detecting whether the vane of the attack angle sensor has a stuck fault; fifthly, fault synthesis is carried out on the self-detection result of the attack angle sensor; the invention improves the fault positioning accuracy of the self-detection method; and the sum value judgment and the judgment method of the output position of the sensor at the time of deflection limit positions of two sides are adopted, so that the fault detection coverage rate of the attack angle sensor is improved.
Description
Technical Field
The invention belongs to the technical field of sensor detection, and particularly relates to a self-detection method of an attack angle sensor.
Background
The attack angle sensor plays an important role in the flight safety of the airplane, and the normal operation of a flight control system can not be separated from the normal operation of the attack angle sensor. Some windmarks of the attack angle sensor do not have the function of long-distance deflection, and because the output signal of the sensor is a random value due to the change of the wind direction before the use, the correctness of the output signal of the attack angle sensor cannot be judged before the use of the attack angle sensor; some incidence angle sensors only use the same mechanical redundancy during self-detection. Failure of the angle of attack sensor can have a severe impact on the flight safety of the aircraft.
Therefore, the output signal of the attack angle sensor is comprehensively detected before use, and the inspection coverage rate of the attack angle sensor is improved.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems, the invention provides a self-detection method of an attack angle sensor, which solves the self-detection problem of the attack angle sensor with a long-distance deflection function and improves the self-detection coverage rate of the attack angle sensor.
The technical scheme of the invention is as follows: a self-detection method of an attack angle sensor comprises the following steps:
step one, detecting whether an acquisition interface of a controller is normal;
respectively carrying out forward constant value excitation and reverse constant value excitation on an acquisition interface of the controller through an excitation line, and checking whether the acquisition interface is normal;
if the result is normal, performing the step two;
otherwise, recording the fault of the acquisition interface;
step two, detecting whether the sum of the output signals of the sensors is normal;
acquisition sensor outputs high-end centering pumped voltage UH-CTAnd the output low end of the sensor is centered on the output end voltage UL-CTThe two are added to obtain a sum voltage USUMBy judging USUMJudging whether the output of the sensor is normal or not;
if the result is normal, performing the third step;
otherwise, recording the found sum value fault;
step three, detecting whether the output signal and the sum value of the sensor at the limit position are normal;
the wind vane forward/reverse deflection is realized through a long-distance deflection function, and after the wind vane deflects to a limit position, whether a sensor output signal is normal or not is acquired;
if the result is normal, performing the fourth step;
if not, recording the found output signal fault and sum value fault of the sensor;
detecting whether the vane of the attack angle sensor has a stuck fault;
the controller controls the attack angle sensor to perform forward deflection or reverse deflection for a short time, so that the wind vane of the sensor cannot stay at the limit positions at two sides, and the controller acquires whether the output signal of the attack angle sensor is still at the limit position;
if the position is at the limit position, the vane jamming fault of the attack angle sensor is shown,
if the wind vane is not at the limit position, the normal work of the wind vane of the attack angle sensor is indicated;
fifthly, fault synthesis is carried out on the self-detection result of the attack angle sensor;
the collection interface faults are integrated into controller faults, and the faults occurring in the rest detection processes are integrated into attack angle sensor faults.
Preferably, the controller in the first step is provided with an excitation line for carrying out forward fixed-value excitation or reverse excitation;
the excitation line is connected with an analog quantity acquisition module of the controller through an acquisition interface.
Preferably, the acquisition interface is provided with a relay;
and switching between the excitation line and the signal output line of the external sensor is completed through the relay.
The technical scheme of the invention has the beneficial technical effects that: the self-detection method of the attack angle sensor solves the self-detection problem before the purely mechanical weathervane attack angle sensor without the long-distance deflection function is used, and before the output signal of the attack angle sensor is detected, whether the acquisition interface of the controller works normally or not is detected, so that the fault positioning accuracy of the self-detection method is improved; and the sum value judgment and the judgment method of the output position of the sensor at the time of deflection limit positions of two sides are adopted, so that the fault detection coverage rate of the attack angle sensor is improved.
Drawings
FIG. 1 is a schematic diagram illustrating a connection relationship between a controller and an angle of attack sensor according to a preferred embodiment of the method for self-detecting an angle of attack of the present invention;
fig. 2 is a schematic flow chart of a detection method according to a preferred embodiment of the attack angle self-detection method of the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 2: the invention provides a self-detection method of an attack angle sensor, which comprises the following steps:
step a, detecting whether an acquisition interface is normal:
the controller dials the switch (I) to the position of the excitation line;
the controller dials the switch II to a positive position to output a positive excitation signal to carry out constant excitation on the acquisition interface;
after passing through the acquisition circuit, checking whether the acquisition value is in an expected excitation constant value range, if not, recording the fault and declaring the fault of the acquisition interface, and if so, considering the acquisition interface to be normal;
the controller dials the switch II to a reverse position to output a reverse excitation signal to carry out constant excitation on the acquisition interface;
after passing through the acquisition circuit, checking whether the acquisition value is in an expected excitation constant value range, if not, recording the fault and declaring the fault of the acquisition interface, and if so, considering the acquisition interface to be normal;
and (4) restoring the switch (r) in the figure 1 to a position for acquiring the output signal of the sensor.
B, detecting whether the sum of the output signals of the sensors is normal:
h-end to CT terminal voltage U for collecting output signal of sensorH-CT；
L-end-to-CT terminal voltage U for collecting output signal of sensorL-CT，
Will UH-CTAnd UL-CTAdd to obtain a sum voltage USUMChecking USUMAnd if the sum is not within the expected sum threshold range, recording the fault and declaring the fault of the sensor sum value, and if the sum is within the threshold range, considering that the sum of the attack angle sensors is normal.
Step c, detecting whether the output signal of the sensor is normal when the sensor is at a certain side limit position:
the controller controls the windage indicator of the attack angle sensor to carry out forward long-distance deflection to a limit position;
the controller collects whether the output signal of the angle of attack sensor and the sum value thereof are within the threshold range of the expected limit position, if not, the controller records the fault and declares the fault of the sensor signal, and if so, the controller considers that the signal of the angle of attack sensor is normal;
the controller controls the windvane of the attack angle sensor to carry out reverse long-distance deflection to a limit position;
the controller collects whether the output signal of the angle of attack sensor and the sum value thereof are within the expected threshold range of the limit position, if not, the controller records the fault and declares the fault of the sensor signal, and if so, the controller considers that the signal of the angle of attack sensor is normal.
In order to prevent the vane from being stuck at the limit position fault mode, after the detection step is completed, the controller controls the attack angle sensor to perform reverse deflection or forward deflection for a short time, so that the sensor vane cannot stay at the limit positions at two sides.
The controller acquires whether an output signal of the angle of attack sensor is still at a forward limit position or a reverse limit position, if the output signal is at the limit position, the jamming fault of the wind vane of the angle of attack sensor is shown, and if the output signal is not at the limit position, the normal work of the wind vane of the angle of attack sensor is shown.
D, carrying out fault synthesis on the self-detection result of the attack angle sensor:
a, integrating faults occurring in the detection process of the step a into controller acquisition interface faults;
and (c) integrating the faults occurring in the detection processes of the steps b and c into the faults of the attack angle sensor.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A self-detection method of an attack angle sensor is characterized in that: the method comprises the following steps:
step one, detecting whether an acquisition interface of a controller is normal;
respectively carrying out forward constant value excitation and reverse constant value excitation on an acquisition interface of the controller through an excitation line, and checking whether the acquisition interface is normal;
if the result is normal, performing the step two;
otherwise, recording the fault of the acquisition interface;
step two, detecting whether the sum of the output signals of the sensors is normal;
acquisition sensor outputs high-end centering pumped voltage UH-CTAnd the output low end of the sensor is centered on the output end voltage UL-CTThe two are added to obtain a sum voltage USUMBy judging USUMJudging whether the output of the sensor is normal or not;
if the result is normal, performing the third step;
otherwise, recording the found sum value fault;
step three, detecting whether the output signal and the sum value of the sensor at the limit position are normal;
the wind vane forward/reverse deflection is realized through a long-distance deflection function, and after the wind vane deflects to a limit position, whether a sensor output signal is normal or not is acquired;
if the result is normal, performing the fourth step;
if not, recording the found output signal fault and sum value fault of the sensor;
detecting whether the vane of the attack angle sensor has a stuck fault;
the controller controls the attack angle sensor to perform forward deflection or reverse deflection for a short time, so that the wind vane of the sensor cannot stay at the limit positions at two sides, and the controller acquires whether the output signal of the attack angle sensor is still at the limit position;
if the position is at the limit position, the vane jamming fault of the attack angle sensor is shown,
if the wind vane is not at the limit position, the normal work of the wind vane of the attack angle sensor is indicated;
fifthly, fault synthesis is carried out on the self-detection result of the attack angle sensor;
the collection interface faults are integrated into controller faults, and the faults occurring in the rest detection processes are integrated into attack angle sensor faults.
2. The angle of attack sensor self-detection method of claim 1, wherein: the controller in the first step is provided with an excitation line for carrying out forward fixed value excitation or reverse excitation;
the excitation line is connected with an analog quantity acquisition module of the controller through an acquisition interface.
3. The angle of attack sensor self-detection method of claim 2, wherein: the acquisition interface is provided with a relay;
and switching between the excitation line and the signal output line of the external sensor is completed through the relay.
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