阅读说明：本技术 一种微型红外惯组复合制导控制系统及其控制方法 (Miniature infrared inertial unit composite guidance control system and control method thereof ) 是由 向俊 邓健辉 王亚杰 孙国梁 刘华峰 赵鹏 于 2021-06-30 设计创作，主要内容包括：本发明公开了一种微型红外惯组复合制导控制系统及其控制方法,微型红外惯组复合制导控制系统包括设置于壳体中的弹载控制器、舵系统、与所述弹载控制器连接的惯性单元和光学单元以及用于供电的电池,所述舵系统驱动舵片,所述弹载控制器根据所述惯性单元得到的惯性导航信息和所述光学单元得到的红外成像信息控制所述舵系统实现复合制导。上述微型红外惯组复合制导控制系统,将火箭弹的飞行过程进行划分,采用复合制导方式,实现更好的组合导航,具有射程远、精度高和成本低的特点。(The invention discloses a micro infrared inertial unit composite guidance control system and a control method thereof. According to the micro infrared inertial unit composite guidance control system, the flight process of the rocket projectile is divided, a composite guidance mode is adopted, better combined navigation is realized, and the micro infrared inertial unit composite guidance control system has the characteristics of long range, high precision and low cost.)

1. The system is characterized by comprising a missile-borne controller (8) arranged in a shell, a rudder system, an inertial unit and an optical unit which are connected with the missile-borne controller (8), and a battery (7) used for supplying power, wherein the rudder system drives a rudder sheet (3), and the missile-borne controller (8) controls the rudder system to realize composite guidance according to inertial navigation information obtained by the inertial unit and infrared imaging information obtained by the optical unit.

2. The micro infrared inertial navigation unit composite guidance and control system according to claim 1, wherein the housing comprises a control cabin section housing (1) and a guidance head housing (11) which are fixedly connected, the inertial unit, the rudder system and the rudder blade (3) are arranged on the control cabin section housing (1), and the optical unit and the missile-borne controller (8) are arranged on the guidance head housing (11).

3. The micro infrared inertial navigation unit composite guidance control system according to claim 2, characterized in that the inertial unit comprises an inertial assembly (6) and the optical unit comprises an optical assembly (12) and an optical sensor (10).

4. The micro infrared inertial navigation unit composite guidance control system according to claim 2, wherein the missile-borne controller (8) is mounted on a controller shell (9), the controller shell (9) is arranged on the control cabin section shell (1), and the missile-borne controller (8) comprises a printed board A (801) provided with a connector I (803) and a printed board B (802) provided with a connector II (804).

5. The micro infrared inertial navigation unit composite guidance control system according to claim 2, characterized in that the rudder system comprises an electric steering engine (2) for driving the rudder sheet (3) to deflect and an angular displacement sensor (4) for detecting a deflection angle.

6. The micro infrared inertial navigation unit composite guidance control system according to claim 5, wherein the electric steering engine (2) comprises a motor (201), a speed reducer (202), a transmission nut (203), a transmission screw (204) and an output rotating shaft (205), the motor (201) is connected with the transmission screw (204) through the speed reducer (202), the transmission screw (204) drives the transmission nut (203), the transmission nut (203) drives the output rotating shaft (205), and the angular displacement sensor (4) detects the angle of the output rotating shaft (205).

7. The micro infrared inertial navigation unit composite guidance control system according to claim 6, wherein the electric steering engine (2) further comprises a lock nut (206), a pressure spring (207), a lock pin (208) and a torsion spring (209), the torsion spring (209) is connected with the rudder piece (3), the pressure spring (207) is connected with the lock pin (208), and the rudder piece (3) is provided with a clamping groove for pushing and locking the lock pin (208).

8. The micro infrared inertial navigation unit composite guidance control system according to any one of claims 1 to 7, wherein the missile-borne controller (8) is provided with an infrared imaging module (81), an image recognition algorithm module (82), an inertial navigation unit calculation module (83), a target position calculation module (84), an acquisition circuit module (85), an operation control module (86), a motor control module (87) and an external interface module (88), the inertial navigation unit calculation module (83) is connected with the inertial unit, the infrared imaging module (81) is connected with the optical unit, and the motor control module (87) is connected with the rudder system.

9. The micro infrared inertial measurement unit composite guidance control system according to any one of claims 2 to 7, characterized by comprising a steering engine battery mounting plate (5) arranged on the control cabin section shell (1), wherein the battery (7) is fixed through the steering engine battery mounting plate (5), the battery (7) is an annular thermal battery with a hollow middle part, and the inertial unit is located at the hollow position of the battery (7).

10. A micro infrared inertial navigation combination composite guidance control method is applied to the micro infrared inertial navigation combination composite guidance control system according to any one of claims 1 to 9, and comprises the following steps:

in the initial flight process and the middle guidance process, an inertia unit is started, inertial navigation information is obtained through calculation of a missile-borne controller (8) to control a rudder system, and the rudder system drives a rudder piece (3) to control the stable flight attitude of a missile body after deflection;

in the final guidance process, an optical unit is started, an infrared imaging information control rudder system is obtained through calculation of a missile-borne controller (8), and the rudder system drives a rudder sheet (3) to control a missile body to deflect and then accurately hit a target.

Technical Field

The invention relates to the technical field of missile guidance, in particular to a miniature infrared inertial measurement unit composite guidance control system. And also relates to a composite guidance control method for the miniature infrared inertial measurement unit.

Background

The traditional miniature rocket projectile has no guide component, is poor in hit precision, difficult to strike accurately and low in cost-effectiveness ratio; the requirements of the miniature rocket projectile on a guidance control system are high, particularly the diameter and the length of the guidance controller.

The single guidance mode has fewer control modules, and the required structural space is correspondingly reduced, so that most of miniature rocket projectiles adopt the single guidance mode to realize the guidance of the rocket projectiles at the present stage. The high-precision guided missile has high hit precision, but is expensive in manufacturing cost and complex in production and maintenance technology; meanwhile, the rocket projectile adopting the single guidance mode can not meet the use requirements at the present stage along with the complexity of the background and the convenience of the interference mode.

Therefore, how to provide a micro infrared inertial unit composite guidance control system suitable for a low-cost composite guidance rocket projectile is a technical problem which needs to be solved by the technical personnel in the field.

Disclosure of Invention

The invention aims to provide a micro infrared inertial measurement unit composite guidance control system which divides the flight process of a rocket projectile, adopts a composite guidance mode, realizes better combined navigation and has the characteristics of long range, high precision and low cost. The invention also aims to provide a micro infrared inertial measurement unit composite guidance control method.

In order to achieve the purpose, the invention provides a micro infrared inertial measurement unit composite guidance control system which comprises a missile-borne controller, a rudder system, an inertial unit, an optical unit and a battery, wherein the missile-borne controller, the rudder system, the inertial unit and the optical unit are arranged in a shell, the inertial unit and the optical unit are connected with the missile-borne controller, the battery is used for supplying power, the rudder system drives a rudder sheet, and the missile-borne controller controls the rudder system to achieve composite guidance according to inertial navigation information obtained by the inertial unit and infrared imaging information obtained by the optical unit.

Preferably, the housing comprises a control cabin section housing and a seeker housing which are fixedly connected, the inertial unit, the rudder system and the rudder sheet are arranged on the control cabin section housing, and the optical unit and the missile-borne controller are arranged on the seeker housing.

Preferably, the inertial unit comprises an inertial component and the optical unit comprises an optical component and an optical sensor.

Preferably, the missile-borne controller is installed on a controller shell, the controller shell is arranged on the control cabin section shell, and the missile-borne controller comprises a printed board A provided with a connector I and a printed board B provided with a connector II.

Preferably, the rudder system comprises an electric steering engine for driving the rudder sheet to deflect and an angular displacement sensor for detecting a deflection angle.

Preferably, the electric steering engine comprises a motor, a speed reducer, a transmission nut, a transmission screw and an output rotating shaft, wherein the motor is connected with the transmission screw through the speed reducer, the transmission screw drives the transmission nut, the transmission nut drives the output rotating shaft, and the angular displacement sensor detects the angle of the output rotating shaft.

Preferably, the electric steering engine further comprises a lock nut, a pressure spring, a lock pin and a torsion spring, wherein the torsion spring is connected with the rudder piece, the pressure spring is connected with the lock pin, and the rudder piece is provided with a clamping groove for pushing the lock pin into the lock pin for locking.

Preferably, the missile-borne controller is provided with an infrared imaging module, an image recognition algorithm module, an inertial measurement unit calculating module, a target position calculating module, an acquisition circuit module, an operation control module, a motor control module and an external interface module, wherein the inertial measurement unit calculating module is connected with the inertial unit, the infrared imaging module is connected with the optical unit, and the motor control module is connected with the rudder system.

Preferably, the control cabin comprises a steering engine battery mounting plate arranged on the control cabin section shell, the battery is fixed through the steering engine battery mounting plate, the battery is an annular thermal battery with a hollow middle part, and the inertia unit is located in the hollow position of the battery.

The invention also provides a micro infrared inertial measurement unit composite guidance control method which is applied to the micro infrared inertial measurement unit composite guidance control system and comprises the following steps:

in the initial flight process and the middle guidance process, an inertia unit is started, inertial navigation information is obtained through calculation of a missile-borne controller to control a rudder system, and the rudder system drives a rudder sheet to control a projectile body to deflect and then stabilize the flight attitude;

in the terminal guidance process, an optical unit is started, infrared imaging information is obtained through calculation of a missile-borne controller to control a rudder system, and the rudder system drives a rudder sheet to control a missile body to deflect and then accurately hit a target.

Compared with the prior art, the micro infrared inertial unit composite guidance control system provided by the invention comprises a shell, and a missile-borne controller, a rudder system, an inertial unit, an optical unit and a battery which are arranged in the shell, wherein the rudder system drives a rudder sheet, the battery supplies power for other components, the inertial unit and the optical unit are connected with the missile-borne controller, and the missile-borne controller realizes composite guidance of the rudder system and the rudder sheet thereof according to inertial navigation information obtained by the inertial unit and infrared imaging information obtained by the optical unit. The miniature infrared inertial group composite guidance control system is used for guidance control of rocket projectiles, divides the flight process of the rocket projectiles, adopts a composite guidance mode, adopts an inertial unit with low cost in the initial flight process and the middle guidance process, adopts an optical unit with high precision in the final guidance process, realizes better combined navigation, and has the characteristics of long range, high precision and low cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a micro infrared inertial measurement unit composite guidance control system provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a rudder system according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a rudder blade tensioner according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a controller according to an embodiment of the present invention;

FIG. 5 is a sectional view of a rocket projectile flight control provided by an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a missile-borne controller according to an embodiment of the present invention.

Wherein:

1-control cabin section shell, 2-electric steering engine, 3-rudder piece, 4-angular displacement sensor, 5-steering engine battery mounting plate, 6-inertia component, 7-battery, 8-missile load controller, 9-controller shell, 10-optical sensor, 11-seeker shell, 12-optical component, 81-infrared imaging module, 82-image recognition algorithm module, 83-inertia group resolving module, 84-target position resolving module, 85-acquisition circuit module, 86-operation control module, 87-motor control module, 88-external interface module, 201-motor, 202-speed reducer, 203-transmission nut, 204-transmission screw, 205-output rotating shaft, 206-locking nut, and, 207-pressure spring, 208-lock pin, 209-torsion spring, 801-printed board A, 802-printed board B, 803-connector I and 804-connector II.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, in which fig. 1 is a schematic structural diagram of a micro infrared inertial navigation unit composite guidance control system provided in an embodiment of the present invention, fig. 2 is a schematic structural diagram of a rudder system provided in an embodiment of the present invention, fig. 3 is a cross-sectional view of a rudder piece tensioning device provided in an embodiment of the present invention, fig. 4 is a schematic structural diagram of a controller provided in an embodiment of the present invention, fig. 5 is a sectional diagram of rocket projectile flight control provided in an embodiment of the present invention, and fig. 6 is a schematic structural diagram of a projectile load controller provided in an embodiment of the present invention.

In a first specific embodiment, the micro infrared inertial unit composite guidance control system provided by the invention is used for guidance control of a rocket projectile, is arranged on a projectile body, and comprises a shell, and a projectile load controller 8, a rudder system, an inertial unit, an optical unit and a battery 7 which are arranged in the shell, wherein the rudder system drives a rudder sheet 3, the battery 7 supplies power for components on the projectile body, the inertial unit and the optical unit are connected with the projectile load controller 8, and the projectile load controller 8 controls the rudder system to realize composite guidance according to inertial navigation information obtained by the inertial unit and infrared imaging information obtained by the optical unit.

It should be noted that one of the core improvement points of the invention lies in the guidance control of the rocket projectile, namely a composite guidance mode, which is equivalent to the replacement and modification of the existing rocket projectile, and the single guidance control system at the head of the original rocket projectile is replaced by the system; the original information acquisition of inertial navigation is realized by using the inertial unit, the original information acquisition of infrared imaging is realized by using the optical unit, the original information acquisition is received and processed by the missile-borne controller 8, the flying process of the rocket projectile is divided, the inertial unit with low cost is adopted in the initial flying process and the middle guidance process, the optical unit with high precision is adopted in the last guidance process, the better combined navigation is realized, and the combined navigation device has the characteristics of long range, high precision and low cost.

The invention provides a miniaturized, high-precision, low-cost, integrated and combined miniature infrared inertial unit composite guidance control system, aiming at solving the problems of large size, low precision, high cost, independence of single units and the like of the traditional rocket projectile control system. The miniature infrared inertial unit composite guidance control system integrates the single machine structures through an integrated design idea, realizes reasonable layout of the single machines in a smaller inner diameter range, breaks through the traditional thought of independent design based on a subsystem with function division, optimizes layout, function combination, control cost and reasonable design, and meets the requirements of miniaturization and integrated design of the control system.

Further, the shell comprises a control cabin section shell 1 and a seeker shell 11 which are fixedly connected through radial sunk screws, the inertial unit, the rudder system and the rudder piece 3 are arranged on the control cabin section shell 1, and the optical unit and the missile-borne controller 8 are arranged on the seeker shell 11.

The optical unit and the seeker shell 11 form an infrared seeker scheme, a yaw and pitching full strapdown stabilizing scheme is adopted during design, a servo structure of the existing seeker is cancelled, the frame structure of the seeker originally is changed into a strapdown structure, the space of the seeker is greatly compressed, the diameter of the front end of a control system is reduced, the simplification of the seeker structure is realized, and the system size is reduced; the size of the inertial unit is in direct proportion to the precision, and in order to meet the miniaturization requirement, the inertial unit with lower precision is selected to reduce the size of the system under the condition of meeting the terminal guidance requirement.

In this embodiment, optimize cabin section structural design, simplify the inside special-shaped structure of bullet wall, each unit and control system all adopt radial screw mode fixed, reduce the processing degree of difficulty of whole cabin section, practice thrift the processing cost.

Further, the inertial unit comprises an inertial assembly 6 and the optical unit comprises an optical assembly 12 and an optical sensor 10.

In the embodiment, the optical assembly 12 is located at the end of the seeker housing 11, and the control cabin housing 1, the seeker housing 11 and the optical assembly 12 form a main body outer contour structure; wherein, a steering engine section, a battery section, an inertia component section and a controller section are arranged in the control cabin section shell 1; the optical components 12 are sequentially arranged in the seeker shell 11 in sequence, and each lens is adjusted and fixed by a spacing ring and a check ring, so that each optical axis of the optical element is overlapped; the optical sensor 10 is mounted in the seeker housing 11, and it is necessary to ensure that the plane of the optical sensor 10 is perpendicular to the optical axis of the optical assembly 12 and that the optical axis is as central as possible in the optical sensor 10 during the mounting process.

Further, the missile-borne controller 8 is installed on the controller shell 9, the controller shell 9 is installed on the control cabin section shell 1, and the missile-borne controller 8 comprises a printed board a801 provided with a connector I803 and a printed board B802 provided with a connector II 804.

In this embodiment, the printed board a801 is mainly an image processing module, a main control chip and a configuration circuit thereof, and is used for processing image information acquired by the optical sensor 10 of the seeker sensor, i.e., the optical unit, and performing flight control; the printed board B802 is mainly a steering engine control amplifying circuit, an inertial navigation analysis circuit, a power supply filtering processing circuit and an external communication circuit, and is used for processing inertial navigation information acquired by an inertial unit, namely the inertial component 6, steering engine control, a power supply module and other functions.

The system integrally designs each single machine, adopts an integral assembly mode, cancels the shell of each single machine control system, uses an integrated missile-borne controller 8 instead, and cancels the shell space of other single machine control systems except the missile-borne controller 8; each single-machine independent control module and power supply module are eliminated; the original control module and the power supply module are integrated on the missile-borne controller 8, so that the use of repeated devices of each single machine is reduced, and the reduction of the system size is realized through the fusion of the devices.

The system integrates all the single computers, changes the original connection mode of connecting the cables through connectors into a flexible printed board, reduces the space used by the connectors and the cables, integrates all the single computer printed boards into one position, and reduces the space between each single computer printed board and a shell; mechanical interfaces among the single machines are eliminated, and the influence of the size of the mechanical interfaces among the single machines on the whole system is reduced; the printed board is designed to adopt a micro-packaged electronic component, and a micro-connector is used instead to reasonably plan the layout, so that the size of the system is reduced.

Besides, a single main control chip and an integrated design of a plurality of functional modules are adopted, and the target position is resolved (angle measurement accuracy), the MIMU data processing, the attitude control and flight control, the steering engine position measurement, the steering engine closed-loop control and the rocket projectile distance target distance are resolved and processed in a unified mode.

Further, the rudder system comprises an electric steering engine 2 for driving the rudder sheet 3 to deflect and an angular displacement sensor 4 for detecting the deflection angle.

Further, the electric steering engine 2 includes a motor 201, a speed reducer 202, a transmission nut 203, a transmission screw 204 and an output rotating shaft 205, the motor 201 is connected to the transmission screw 204 through the speed reducer 202, the transmission screw 204 drives the transmission nut 203, the transmission nut 203 drives the output rotating shaft 205, and the angular displacement sensor 4 detects an angle of the output rotating shaft 205.

In this embodiment, a micro-miniature electric steering engine speed reduction structure is used, a screw and nut transmission mode is adopted, and the deflection of the rudder blade 3 is realized through the output rotating shaft 205, so that the larger space of the original gear set speed reducer is reduced.

Further, the electric steering engine 2 further comprises a lock nut 206, a pressure spring 207, a lock pin 208 and a torsion spring 209, the torsion spring 209 is connected with the rudder piece 3, the pressure spring 207 is connected with the lock pin 208, and the rudder piece 3 is provided with a clamping groove for pushing the lock pin 208 into and locking.

In the embodiment, when the rocket projectile is located in the launching tube cabin, the torsion spring 209 has pretightening force, and the outward expansion of the rudder sheet 3 is restrained by the launching tube wall; when the rocket projectile leaves the launch barrel cabin, the torsion spring 209 ejects the rudder blade 3, and after the rudder blade 3 is unfolded, the pressure spring 207 pushes the lock pin 208 into the clamping groove of the rudder blade 3 to lock the rudder blade 3. On the basis, the missile-borne controller 8 sends out a steering engine control signal to realize the control of the electric steering engine 2; the motor 201 passes through the speed reducer 202 with the speed reduction ratio of 2 and then drives the transmission nut 203 to move through the transmission screw 204, the transmission nut 203 drives the output rotating shaft 205 to rotate, and the output rotating shaft 205 drives the rudder piece 3.

The output rotating shaft 205 is connected with the angular displacement sensor 4, the angular displacement sensor 4 outputs the rotating angle of the output rotating shaft 205 to the missile-borne controller 8 in a voltage mode, and the missile-borne controller 8 controls the motor 201 according to flight requirements and feedback information of the angular displacement sensor 4.

Further, the missile-borne controller 8 is provided with an infrared imaging module 81, an image recognition algorithm module 82, an inertial measurement unit calculating module 83, a target position calculating module 84, an acquisition circuit module 85, an operation control module 86, a motor control module 87 and an external interface module 88, wherein the inertial measurement unit calculating module 83 is connected with an inertial unit, the infrared imaging module 81 is connected with an optical unit, and the motor control module 87 is connected with a rudder system.

Further, including locating steering wheel battery mounting panel 5 of control cabin section casing 1, battery 7 is fixed through steering wheel battery mounting panel 5, and battery 7 is the annular thermal battery that is hollow in the middle part, and inertial unit is located the hollow position of battery 7.

In the present embodiment, the battery 7 is a thermal battery, and the discharge curve is designed according to specific use conditions, so that the inertia assembly 6 is placed in the battery 7 to save space.

It should be noted that the invention adopts a modularized thinking, including function modularization and device modularization, that is, a series of single devices and functions of an infrared seeker, an inertial navigation component, a missile-borne controller 8, a missile-borne battery, an electric steering engine 2, an interface and driving circuit, a distributor, a steering engine controller and the like included in a traditional rocket projectile guidance control system are integrated into a whole to serve as an independent device module and a function module of the rocket projectile. The integrated design of the control assembly electrical system is not only simply to add all relevant hardware and functions, and a single-machine module is made, and the integrated design of the hardware architecture of the assembly is comprehensively analyzed and optimized based on the whole functions, indexes and cost of the assembly, integrated designs such as a board card circuit, a connector, a cable and an interface of each original subsystem structure are formed, an integrated module with compact structure and complete functions is formed, mismatching of clocks is reduced, production and manufacturing cost is reduced, and the whole maintainability and reliability of the system are improved.

The invention also provides a micro infrared inertial set composite guidance control method which is applied to the micro infrared inertial set composite guidance control system and has all the beneficial effects of the micro infrared inertial set composite guidance control system; the rocket projectile flight process is divided, better combined navigation is realized, the rocket projectile anti-interference performance is enhanced through composite guidance, and the rocket projectile flight process can adapt to complex and changeable application environments.

The method specifically comprises the following steps: in the initial flight process and the middle guidance process, an inertia unit is started, inertial navigation information is obtained through calculation of a missile-borne controller 8 to control a rudder system, and the rudder system drives a rudder piece 3 to control the stable flight attitude of a projectile after deflection; in the final guidance process, the optical unit is started, the infrared imaging information is obtained through calculation of the missile-borne controller 8 to control the rudder system, and the rudder system drives the rudder piece 3 to control the missile body to deflect and then accurately hit a target.

In the embodiment, according to different requirements of different flight processes on indexes, a composite guidance mode is adopted, and the original single guidance with low precision and short range is changed into a composite guidance mode with high precision and larger range; the initial flight process and the middle guidance process adopt inertia units with large range and low cost, and the final guidance adopts optical units with high precision, so that the precision is improved, the cost caused by performance redundancy generated by using a high-precision inertia unit is reduced, and the cost caused by the fact that the expected purpose cannot be completed due to interference generated by a single guidance mode is reduced.

Exemplarily, taking airborne transmission as an example:

during combat, a pod system on the helicopter searches and finds a target, and tracks the target after capturing the target;

transmitting the measured target position information, target image information, carrier information and rocket projectile control information to the projectile carrier controller 8;

after the launching condition is formed, a shooter sends down a firing button, a rocket projectile launches off-track, the rudder sheet 3 pops up and is locked after being separated from the restraint of the launching tube, the battery 7 is activated, and the control system is powered by the battery 7;

the optical sensor 10 is started to be preheated, the inertia assembly 6 starts to work, the target position calculating module 84 calls information calculated by the inertia assembly calculating module 83 to determine the shot distance and the current attitude, and the operation control module 86 processes the projectile attitude and controls the motor control module 87 according to the deflection angle of the rudder sheet 3 fed back by the acquisition circuit module 85;

the motor control module 87 controls 4 electric steering engines 2 to rotate, the rudder sheet 3 deflects to a corresponding angle, and the rudder deflection angle influences the attitude motion of the projectile body and the position of the center of mass of the projectile body in a launching coordinate system so as to control the deflection of the projectile body;

the missile-borne controller 8 resolves inertial navigation information and stabilizes the rocket projectile attitude;

after the rocket projectile is stable in posture, the rocket projectile enters a middle guidance flight section, a projectile loading controller 8 adopts a speed tracking guidance method for control, and the rocket projectile flies to a target direction under the condition of keeping a certain attack angle;

under the condition that a rocket projectile arrives at a target for detection, an optical component 12 of a seeker starts working, the seeker detects the target and compares the target, a projectile-borne controller 8 controls a trajectory according to the target direction and inertial navigation information, the target enters an effective detection range of the seeker, and the seeker is prepared to capture the target and start terminal guidance;

when the seeker identifies a target and locks the target, the seeker resolves target line-of-sight angle and line-of-sight angle rate information according to the projectile pitch angle and pitch angle rate, the control system generates a guidance instruction according to a proportional guidance law, the guidance instruction controls the attitude control system in an overload mode, the trim rudder deflection angle is directly added into channel rudder control quantity, the steering engine is controlled to deflect, and the guided rocket projectile is controlled to accurately hit the target.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The micro infrared inertial measurement unit composite guidance control system and the control method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.