Geographic tracking rapid correction method for airborne photoelectric pod

By calculating the pre-tuning angle required for the aiming line of the photoelectric pod to be aligned with the target position, and using the geographic tracking PID controller to rotate and correct the direction, the geographic tracking correction method in the prior art has strict requirements on takeoff scenarios and long calculation time. The problem of this achieves fast and accurate target locking and task execution.

CN119440075AInactive Publication Date: 2025-02-14LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC

Patent Information

Application Number
CN202411551699.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-02-14
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the prior art, the geographic tracking and correction method has strict requirements on takeoff scenarios and has a long calculation time, resulting in untimely task execution.

Method used

By combining the onboard longitude and latitude information, target point longitude and latitude information, aircraft attitude angle and photoelectric pod frame angle information, the pre-tuned rotation angle required for the photoelectric pod aiming line to be aligned with the target position, and the geographic tracking PID controller is used to track Turn directions and correct them until the aiming line points to the target position.

Benefits of technology

It realizes the rapid correction of geographical tracking errors in the photoelectric pod, improves the target locking accuracy and task execution efficiency, and reduces the computing time.

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Abstract

The invention belongs to the technical field of automatic control and inertial navigation. The invention provides a geographic tracking rapid correction method for an airborne photoelectric pod. The method comprises the following steps: after the photoelectric pod receives a geographical tracking task instruction of a ground control center, calculating an azimuth angle and a pitch angle of the photoelectric pod required for aligning an aiming line of the photoelectric pod to a target prediction point by combining information of longitude and latitude heights of a carrier aircraft, longitude and latitude heights of a target point, an aircraft attitude angle and a frame angle of the photoelectric pod; and then a geographical tracking PID controller is used for controlling and turning, meanwhile, a ground image returned in real time is observed, and if the aiming line of the photoelectric pod deviates from the position of the target point, a direction key can be used for compensation and correction until the position of the target point coincides with the center of the image. According to the embodiment of the invention, the method can achieve the precise locking of a target through the quick correction of the geographic tracking error of the airborne photoelectric pod. And moreover, the calculation amount is small, the precision is high, the instantaneity is strong, and the task completion efficiency and success rate are improved.
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Description

Technical Field

[0001] The disclosed embodiments relate to the field of automatic control and inertial navigation technology, and in particular to a geographic tracking rapid correction method for an airborne optoelectronic pod. Background Art

[0002] As an important mission sensor for the carrier to obtain scene information, optoelectronic pods are now widely equipped on various UAV platforms. In the process of UAV fixed-point detection, it is very important to quickly and accurately lock the geographic target point or image target in the field of view.

[0003] In the actual assembly process, there is an installation error between the axis of the inertial measurement unit and the pod's sighting line, and they cannot be completely aligned. The existence of the installation error causes the angle information of the target relative to the pod calculated based on geographic tracking to deviate from the actual one, and the existence of the deviation may cause the target position to deviate from the center of the image.

[0004] The commonly used geo-tracking correction method is the IMU calibration correction technology, which uses the circling time of the carrier aircraft during the takeoff phase to perform multiple range calibrations on the target and calculate the IMU installation deviation angle. This method has strict requirements on the takeoff scene and takes a long time to calculate, which is not conducive to the rapid execution of the task.

[0005] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0006] It should be noted that this section is intended to provide background or context for the technical solutions of the present disclosure stated in the claims. The description herein is not admitted to be prior art by virtue of being included in this section. Summary of the invention

[0007] In order to avoid the shortcomings of the prior art, the present invention provides a geographic tracking rapid correction method for an airborne optoelectronic pod, which is used to solve the problems in the prior art that the take-off scene requirements are relatively strict and the calculation time is long, which is not conducive to the rapid execution of the task.

[0008] According to an embodiment of the present disclosure, a method for rapid correction of geographic tracking for an airborne optoelectronic pod is provided, the method comprising: According to the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information, the pre-adjustment angle required for the sighting line of the optoelectronic pod to align with the target position is obtained; wherein the pre-adjustment angle includes a pre-adjustment azimuth angle and a pre-adjustment pitch angle; The geographic tracking PID controller adjusts the direction of the optoelectronic pod according to the pre-adjustment angle to determine whether the sighting line of the optoelectronic pod points to the target position; If not, a preset correction value is input into the geographic tracking PID controller to correct the direction of the sighting line of the optoelectronic pod; Repeatedly determine whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculate and record the accumulated correction amount to obtain a correction value.

[0009] Further, the step of obtaining the pre-adjustment angle required for aligning the sighting line of the optoelectronic pod with the target position according to the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information includes: Acquire the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information required for geographic tracking in real time according to the airborne platform; The airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information are converted from the earth coordinate system to the carrier coordinate system to obtain the rotation azimuth angle and the rotation pitch angle required to align the sighting line of the optoelectronic pod with the target position.

[0010] Further, the step of the geographic tracking PID controller turning the direction of the optoelectronic pod according to the pre-turn angle and determining whether the sighting line of the optoelectronic pod points to the target position includes: The pre-turn angle is input into the geographic tracking PID controller, the geographic tracking PID controller calculates a first control amount through a PID control algorithm, and controls the optoelectronic pod to turn according to the first control amount; After the turn is completed, the optoelectronic pod transmits the first ground image along the direction of its sighting line back to the ground display and control device in real time; The ground display and control device determines whether the sighting line of the optoelectronic pod points to the target position according to the ground image.

[0011] Furthermore, the step of the geographic tracking PID controller turning the direction of the optoelectronic pod according to the pre-turn angle and determining whether the sighting line of the optoelectronic pod points to the target position further includes: If so, end directly.

[0012] Furthermore, the step of inputting a preset correction amount into the geographic tracking PID controller to correct the direction of the optoelectronic pod comprises: Determining a first correction direction in which the sighting line of the optoelectronic pod needs to be adjusted according to the ground image; The first correction direction and the correction amount are input into the geographic tracking PID controller, and the geographic tracking PID controller controls the optoelectronic pod to make corrections.

[0013] Furthermore, the correction amount is 0.1 degrees.

[0014] Further, the step of repeatedly determining whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculating and recording the accumulated correction amount to obtain the correction value includes: After the correction is completed, the current second ground image of the optoelectronic pod is transmitted back to the ground display and control device; The ground display and control device determines whether the sighting line of the optoelectronic pod points to the target position according to the second ground image; If not, determine the second correction direction that needs to be adjusted for the sighting line of the optoelectronic pod according to the second ground image, input the second correction direction and the correction amount into the geographic tracking PID controller, the geographic tracking PID controller calculates the second control amount through the PID control algorithm, controls the optoelectronic pod to make corrections according to the second control amount, and continues to judge whether the sighting line of the optoelectronic pod points to the target position; If so, the accumulated correction amount is calculated and recorded, and a correction value is obtained according to the correction amount.

[0015] Furthermore, the calculation process of the geographic tracking PID controller is: According to the pre-adjustment angle and the amount of correction each time , get the correction angle of the photoelectric pod after correction ;

[0016] According to the correction angle and the initial angle of the optoelectronic pod , get the cumulative correction value :

[0017] Correct the value As the input of the geo-tracking PID controller, the control output is calculated :

[0018] Where s is the complex frequency, is the proportional coefficient of the geographic tracking PID controller, is the integration time constant, is the differential time constant.

[0019] Furthermore, the method further comprises: The correction value is written into the storage chip of the optoelectronic pod so that the correction value can be accurately read out after the optoelectronic pod is powered on again.

[0020] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: In the embodiment of the present disclosure, through the above-mentioned geographic tracking rapid correction method for airborne optoelectronic pods, on the one hand, after receiving the geographic tracking task instruction from the ground control center, the optoelectronic pod combines the latitude and longitude of the carrier aircraft, the latitude and longitude of the target point, the aircraft attitude angle, and the optoelectronic pod frame angle information to calculate the optoelectronic pod azimuth and pitch angle required to align the aiming line of the optoelectronic pod with the target prediction point, and then controls the turn through the geographic tracking PID controller, while observing the real-time ground image returned. If the aiming line of the optoelectronic pod deviates from the target point position, the direction keys can be used for compensation correction until the target point position coincides with the center of the image, and the data is written into the EEPROM for storage. On the other hand, this method can accurately lock the target by quickly correcting the geographic tracking error of the airborne optoelectronic pod; and the amount of calculation is small, the accuracy is high, and the immediacy is strong, which improves the efficiency and success rate of task completion, and can be transplanted to other types of optoelectronic products, with universality and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0022] Figure 1 A diagram showing the steps of a method for rapid correction of geographic tracking of an airborne optoelectronic pod in an exemplary embodiment of the present disclosure; Figure 2 A control principle diagram of a geographic tracking PID controller in an exemplary embodiment of the present disclosure is shown; Figure 3 A specific task flow chart of a method for rapid correction of geographic tracking of an airborne optoelectronic pod in an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0024] In addition, the accompanying drawings are only schematic illustrations of the embodiments of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0025] This example embodiment provides a method for rapid correction of geographic tracking for an airborne optoelectronic pod. Figure 1 As shown in , the geographic tracking rapid correction method for an airborne optoelectronic pod may include: steps S101 to S104.

[0026] Step S101: obtaining the pre-adjustment angle required for the sighting line of the optoelectronic pod to align with the target position according to the aircraft latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information; wherein the pre-adjustment angle includes the pre-adjustment azimuth angle and the pre-adjustment pitch angle; Step S102: the geographic tracking PID controller adjusts the direction of the optoelectronic pod according to the pre-adjustment angle to determine whether the sighting line of the optoelectronic pod points to the target position; Step S103: If not, input a preset correction value into the geographic tracking PID controller to correct the direction of the sighting line of the optoelectronic pod; Step S104: repeatedly determining whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculating and recording the accumulated correction amount to obtain a correction value.

[0027] Through the above-mentioned geographic tracking rapid correction method for airborne optoelectronic pods, on the one hand, after receiving the geographic tracking task instruction from the ground control center, the optoelectronic pod combines the latitude and longitude of the carrier aircraft, the latitude and longitude of the target point, the aircraft attitude angle, and the optoelectronic pod frame angle information to calculate the optoelectronic pod azimuth and pitch angle required to align the aiming line of the optoelectronic pod with the target prediction point, and then controls the turn through the geographic tracking PID controller, while observing the real-time ground image returned. If the aiming line of the optoelectronic pod deviates from the target point position, the direction keys can be used for compensation correction until the target point position coincides with the center of the image, and the data is written into the EEPROM for storage. On the other hand, this method can accurately lock the target by quickly correcting the geographic tracking error of the airborne optoelectronic pod; and the amount of calculation is small, the accuracy is high, and the immediacy is strong, which improves the efficiency and success rate of task completion, and can be transplanted to other types of optoelectronic products, with universality and practicality.

[0028] Next, we will refer to Figures 1 to 3 The various steps of the above-mentioned geographic tracking rapid correction method for an airborne optoelectronic pod in this example implementation are described in more detail.

[0029] In step S101, the pre-adjustment angle required for aligning the sighting line of the optoelectronic pod with the target position is obtained according to the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information; wherein the pre-adjustment angle includes a pre-adjustment azimuth angle and a pre-adjustment pitch angle.

[0030] Specifically, the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information required for geographic tracking are acquired in real time according to the airborne platform; The airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information are converted from the earth coordinate system to the carrier coordinate system to obtain the rotation azimuth angle and the rotation pitch angle required to align the sighting line of the optoelectronic pod with the target position.

[0031] In step S102 to step S104, the geographic tracking proportional-integral-differential (PID) controller adjusts the direction of the optoelectronic pod according to the pre-adjustment angle to determine whether the sighting line of the optoelectronic pod points to the target position. If not, a preset correction amount is input to the geographic tracking PID controller to correct the direction of the sighting line of the optoelectronic pod. Repeat the determination of whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculate and record the accumulated correction amount to obtain a correction value.

[0032] Specifically, the pre-turn angle is input into the geographic tracking PID controller, and the geographic tracking PID controller calculates the first control amount through the PID control algorithm, and controls the optoelectronic pod to turn according to the first control amount; at the same time, the PID parameters are optimized and adjusted to achieve smooth turning; after the turning is completed, the optoelectronic pod will send back the first ground image along the direction of its sight line to the ground display and control device in real time; the ground display and control device determines whether the sight line of the optoelectronic pod points to the target position according to the ground image. If so, it ends directly.

[0033] If not, determine the first correction direction of the sighting line of the optoelectronic pod that needs to be adjusted according to the ground image; input the first correction direction and the correction amount into the geographic tracking PID controller, and the geographic tracking PID controller controls the optoelectronic pod to make corrections.

[0034] After the correction is completed, the current second ground image of the optoelectronic pod is transmitted back to the ground display and control device; the ground display and control device determines whether the sighting line of the optoelectronic pod points to the target position according to the second ground image; If not, the second correction direction of the sighting line of the optoelectronic pod that needs to be adjusted is determined according to the second ground image, and the second correction direction and the correction amount are input into the geographic tracking PID controller. The geographic tracking PID controller calculates the second control amount through the PID control algorithm, and controls the optoelectronic pod to make corrections according to the second control amount.

[0035] Continue to determine whether the sighting line of the optoelectronic pod points to the target position; if so, calculate and record the accumulated correction amount, and obtain a correction value based on the correction amount.

[0036] like Figure 2 As shown, the control principle of the geographic tracking PID controller is: According to the pre-adjustment angle and the amount of correction each time , get the correction angle of the photoelectric pod after correction ;

[0037] According to the correction angle and the initial angle of the optoelectronic pod , get the cumulative correction value :

[0038] Correct the value As the input of the geo-tracking PID controller, the control output is calculated :

[0039] Where s is the complex frequency, is the proportional coefficient of the geographic tracking PID controller, is the integration time constant, is the differential time constant.

[0040] By adjusting the three control parameters of the slave PID controller , and To obtain better control effect.

[0041] The stabilization loop controls the optical axis of the optoelectronic pod to maintain a stable direction in the inertial space to eliminate the influence of the carrier aircraft disturbance on the optical axis direction. As the input of the stabilization loop, the optoelectronic pod can be controlled to rotate to a specified angle while being stabilized, thereby achieving geographic tracking of the target.

[0042] In a specific embodiment, Figure 3 As shown, the process of using geographic tracking rapid correction method to lock the target is: After receiving the airborne geographic tracking command, the azimuth and pitch angle of the optoelectronic pod required to align the aiming line of sight of the optoelectronic pod with the target prediction point is calculated by combining the airborne latitude and longitude, the latitude and longitude of the target point, the aircraft attitude angle, and the optoelectronic pod frame angle information; Through the geographic tracking PID control algorithm, the angle value calculated in step 1 is used as the input deviation to control the rotation, and the driving motor rotates the optical axis of the optoelectronic pod to the target position. At the same time, the PID parameters are optimized and adjusted to achieve smooth rotation; Observe the real-time ground images sent back. If the sighting line of the optoelectronic pod deviates from the target point, the angle can be fine-tuned through the "up", "down", "left" and "right" arrow keys on the ground display and control device. Considering the influence of processing accuracy and assembly accuracy, first determine that the range of the geographic tracking correction value is between -3 degrees and +3 degrees, so each direction correction is set to 0.1 degrees until the target is displayed in the center of the sighting line, stop the correction and record the current cumulative correction value; The geographic tracking correction value is written into the EEPROM memory chip of the optoelectronic pod for storage, so that the correction angle can be accurately read after the optoelectronic pod is powered on again.

[0043] In a specific embodiment, Keil is used to perform algorithm simulation on the geographic tracking fast correction method.

[0044] 1. Enter the information required for geographic tracking: the longitude of the aircraft is 112.3675485°, the latitude of the aircraft is 34.6784652°, the altitude of the aircraft is 346, the longitude of the target point is 112.4879546°, the latitude of the target point is 34.6784652°, the altitude of the target point is 346, the azimuth of the optoelectronic pod is 35°, and the pitch angle is 0°; 2. After geographic tracking calculation, the angle of the turning method is calculated to be 90°, and the pitch is 0°, and the optoelectronic pod motor is driven to turn the angle; 3. After stabilization, observe that the target point is on the left side of the aiming line. Click the "right direction key" to fine-tune the angle. After 5 times, the target point coincides with the center of the aiming line. Note the current correction angle of 0.5°; 4. After the optoelectronic pod is powered on again, it can perform geographic tracking and accurately turn to the center of the aiming line.

[0045] Through the above-mentioned geographic tracking rapid correction method for airborne optoelectronic pods, on the one hand, after receiving the geographic tracking task instruction from the ground control center, the optoelectronic pod combines the latitude and longitude of the carrier aircraft, the latitude and longitude of the target point, the aircraft attitude angle, and the optoelectronic pod frame angle information to calculate the optoelectronic pod azimuth and pitch angle required to align the aiming line of the optoelectronic pod with the target prediction point, and then controls the turn through the geographic tracking PID controller, while observing the real-time ground image returned. If the aiming line of the optoelectronic pod deviates from the target point position, the direction keys can be used for compensation correction until the target point position coincides with the center of the image, and the data is written into the EEPROM for storage. On the other hand, this method can accurately lock the target by quickly correcting the geographic tracking error of the airborne optoelectronic pod; and the amount of calculation is small, the accuracy is high, and the immediacy is strong, which improves the efficiency and success rate of task completion, and can be transplanted to other types of optoelectronic products, with universality and practicality.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0048] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A geographic tracking rapid correction method for an airborne optoelectronic pod, characterized in that: The method includes: According to the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information, the pre-adjustment angle required for the sighting line of the optoelectronic pod to align with the target position is obtained; wherein the pre-adjustment angle includes a pre-adjustment azimuth angle and a pre-adjustment pitch angle; The geographic tracking PID controller adjusts the direction of the optoelectronic pod according to the pre-adjustment angle to determine whether the sighting line of the optoelectronic pod points to the target position; If not, a preset correction value is input into the geographic tracking PID controller to correct the direction of the sighting line of the optoelectronic pod; Repeatedly determine whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculate and record the accumulated correction amount to obtain a correction value.

2. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 1 is characterized in that: The step of obtaining the pre-adjustment angle required for aligning the sighting line of the optoelectronic pod with the target position according to the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information includes: Acquire the airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information required for geographic tracking in real time according to the airborne platform; The airborne latitude and longitude information, the target point latitude and longitude information, the aircraft attitude angle information and the optoelectronic pod frame angle information are converted from the earth coordinate system to the carrier coordinate system to obtain the rotation azimuth angle and the rotation pitch angle required to align the sighting line of the optoelectronic pod with the target position.

3. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 2 is characterized in that: The step of the geographic tracking PID controller turning the direction of the optoelectronic pod according to the pre-turn angle and determining whether the sighting line of the optoelectronic pod points to the target position includes: The pre-turn angle is input into the geographic tracking PID controller, the geographic tracking PID controller calculates a first control amount through a PID control algorithm, and controls the optoelectronic pod to turn according to the first control amount; After the turn is completed, the optoelectronic pod transmits the first ground image along the direction of its sighting line back to the ground display and control device in real time; The ground display and control device determines whether the sighting line of the optoelectronic pod points to the target position according to the ground image.

4. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 3 is characterized in that: The step of the geographic tracking PID controller turning the direction of the optoelectronic pod according to the pre-turn angle and determining whether the sighting line of the optoelectronic pod points to the target position further includes: If so, end directly.

5. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 4 is characterized in that: The step of inputting a preset correction amount into the geographic tracking PID controller to correct the direction of the optoelectronic pod comprises: Determining a first correction direction in which the sighting line of the optoelectronic pod needs to be adjusted according to the ground image; The first correction direction and the correction amount are input into the geographic tracking PID controller, and the geographic tracking PID controller controls the optoelectronic pod to make corrections.

6. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 5, characterized in that: The correction amount is 0.1 degrees.

7. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 5, characterized in that: The step of repeatedly determining whether the sighting line of the optoelectronic pod points to the target position until the sighting line of the optoelectronic pod points to the target position, and calculating and recording the accumulated correction amount to obtain the correction value includes: After the correction is completed, the current second ground image of the optoelectronic pod is transmitted back to the ground display and control device; The ground display and control device determines whether the sighting line of the optoelectronic pod points to the target position according to the second ground image; If not, determine the second correction direction that needs to be adjusted for the sighting line of the optoelectronic pod according to the second ground image, input the second correction direction and the correction amount into the geographic tracking PID controller, the geographic tracking PID controller calculates the second control amount through the PID control algorithm, controls the optoelectronic pod to make corrections according to the second control amount, and continues to judge whether the sighting line of the optoelectronic pod points to the target position; If so, the accumulated correction amount is calculated and recorded, and a correction value is obtained according to the correction amount.

8. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 7, characterized in that: The calculation process of the geographic tracking PID controller is: According to the pre-adjustment angle and the amount of correction each time , get the correction angle of the photoelectric pod after correction ; According to the correction angle and the initial angle of the optoelectronic pod , get the cumulative correction value : Correct the value As the input of the geo-tracking PID controller, the control output is calculated : Where s is the complex frequency, is the proportional coefficient of the geographic tracking PID controller, is the integration time constant, is the differential time constant.

9. The geographic tracking rapid correction method for an airborne optoelectronic pod according to claim 1, characterized in that: The method further includes: The correction value is written into the storage chip of the optoelectronic pod so that the correction value can be accurately read out after the optoelectronic pod is powered on again.

Citation Information

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  • Continuous tracking and reconnaissance method for fixed-point target by photoelectric pod of fixed-wing unmanned aerial vehicle

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  • Monocycle balance control method and system based on PID (Proportion Integration Differentiation) controller

    CN118112921A

  • Continuous and automatic powder metering and charging system for sealant production

    CN202943779U

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