CN116203849A - Falling angle constraint control system applied to remote composite guidance aircraft - Google Patents
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Abstract
The invention discloses a falling angle constraint control system applied to a remote composite guidance aircraft, wherein the system adopts a satellite laser composite guidance aircraft to conduct guidance control; the system adopts a satellite guidance strategy to perform middle guidance gliding so as to achieve the purpose of range extension; in the terminal guidance section, a novel sliding mode guidance law is adopted, and on the basis of guaranteeing hit accuracy, the accurate control of the falling angle is realized.
Description
Technical Field
The invention relates to a range-extending and falling angle constraint control system of an aircraft, in particular to a falling angle constraint control system applied to a remote composite guidance aircraft.
Background
With advances in equipment technology and changes in actual demand, accurate striking of targets has become an increasingly important technical requirement. The device has the capability of precisely striking the key target of the opposite party, can quickly establish advantages of the opposite party, and has the advantages of difficult generation of accidental injury, low cost and the like; the precision striking technique has become increasingly critical to combat.
The precision guidance aircraft is used as important equipment for precisely striking the target, and with the progress of technology, the requirements on the precision guidance aircraft are gradually increased; in the hardware level, single guidance detection equipment can cause information error measurement due to self limitation and deficiency, hit accuracy is reduced, and application requirements of modern environments can not be met gradually.
While at the software level, guidance systems are critical parts of aircraft, improvements are needed to cope with new needs. On the one hand, increasing the range is one direction that aircraft are continually pursuing in order to allow the aircraft to launch outside the range of detection of the other party, in order to increase the difficulty of interception of the other party. On the other hand, in order that the aircraft may hit the weak part of the counterpart's important facility without affecting the surrounding innocent masses, the falling angle constraint is also of great concern as a key ring for accurate hit. The method has the advantages of large damage to key targets and small damage to irrelevant things, but also has the defect of difficult control, a guidance system with stronger robustness is needed, and accordingly, the guidance law is used as the key of the guidance system, and new improvement is needed.
Based on the above problems, the present inventors have made intensive studies on a guidance control system for an aircraft, in hopes of designing a new guidance control system capable of solving the above problems.
Disclosure of Invention
In order to overcome the problems, the inventor has conducted intensive researches and designs a falling angle constraint control system applied to a remote composite guidance aircraft, wherein the system adopts a satellite laser composite guidance aircraft to conduct guidance control; the system adopts a satellite guidance strategy to perform middle guidance gliding so as to achieve the purpose of range extension; in the terminal guidance section, a novel sliding mode guidance law is adopted, and on the basis of guaranteeing hit accuracy, the accurate control of the falling angle is realized, so that the invention is completed.
In particular, it is an object of the present invention to provide a roll angle constraint control system for a remotely compound guided vehicle, the system comprising,
the inertial component module 1 is used for obtaining the roll angle of the aircraft in real time through the inertial component module 1;
the satellite guidance module 2 is used for acquiring the position and speed information of the aircraft in real time through the satellite guidance module 2;
the laser guidance module 3 is used for acquiring the missile vision angular rate in real time after the aircraft enters the terminal guidance section;
the central processing module 4 is used for obtaining the overload required by the aircraft in real time according to the received information, decomposing the overload required by the aircraft according to the rolling angle information, generating a rudder deflection instruction, transmitting the rudder deflection instruction to the actuating mechanism, and controlling the actuating mechanism to perform rudder operation.
Wherein, when the aircraft is in the middle guidance section, the central processing module 4 obtains the overload required by the guidance law of the overweight proportion,
the central processing module 4 obtains the required overload through a novel sliding mode guidance law when the aircraft is in the terminal guidance section.
Wherein, the overload proportional guidance law is obtained by the following formula (I):
Wherein the relative movement speed of the bullet meshBy relative distance to the bullet eye->Obtaining a derivative;
wherein, the relative distance between the bullet and the eyeObtained by the following formula (II):
The novel sliding mode guidance law obtains the overload required by the following formula (IV):
Wherein, the slip form surfaceThe time-dependent change is represented by the following formula (six):
The invention has the beneficial effects that:
(1) According to the falling angle constraint control system applied to the remote composite guidance aircraft, disclosed by the invention, the satellite laser composite guidance is adopted to improve the target detection and information collection capacity of the guidance equipment, so that the accurate hit capacity of the aircraft is improved; the satellite laser composite guidance is adopted to make up for the problem that single guidance equipment is insufficient in information acquisition capacity; the middle guidance section adopts a satellite guidance system to provide information for the aircraft to glide, so that the aircraft cannot deviate from the direction during range extension; the satellite laser composite guidance is adopted in the terminal guidance section, the relative distance between the missile and the target is obtained through a satellite guidance system, and the laser guidance system obtains the visual angle of the missile so as to cope with the modern complex actual situation;
(2) According to the falling angle constraint control system applied to the remote composite guidance aircraft, the satellite guidance system is adopted in the middle guidance section, and the guidance law is guided by the overweight compensation proportion to control the aircraft to perform gliding range increase; because the guidance law adds a gravity compensation signal in the proportional guidance loop, the path of the aircraft can be lifted upwards in the initial stage of proportional guidance so as to increase the flight envelope of the aircraft;
(3) According to the invention, in the falling angle constraint control system applied to the remote composite guidance aircraft, the terminal guidance section adopts a novel sliding mode guidance law, so that the robustness of the aircraft is improved, and the expected falling angle can be realized with smaller error; the PID sliding mode surface can realize smaller steady-state error and bring the advantage of stronger integral control robustness; the novel approach law can solve the buffeting problem in the approach process, so that the terminal guidance process is more stable.
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FIG. 1 is a logic diagram of the overall architecture of a roll angle constraint control system applied to a remotely compound guided vehicle in accordance with a preferred embodiment of the present invention;
FIG. 2 illustrates an aircraft trajectory curve in an embodiment;
fig. 3 shows the aircraft trajectory curve in the comparative example.
Reference numerals
1-inertial component module
2-satellite guidance module
3-laser guidance module
4-central processing module
Detailed Description
The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the invention, a falling angle constraint control system applied to a remote composite guidance aircraft is provided, and as shown in fig. 1, the system comprises an inertial component module 1, a satellite guidance module 2, a laser guidance module 3 and a central processing module 4. Preferably, the system also comprises a power supply master control device which is connected with a thermal power supply on the aircraft and is responsible for supplying power to the whole system, and each module can normally work under rated power according to the voltage requirement.
The roll angle of the aircraft is obtained in real time through the inertial component module 1, and the roll angle information is transmitted to the central processing module as input quantity. The inertial component module 1 comprises INS inertial elements such as a triaxial MEMS gyroscope and an accelerometer, zero alignment is required after the inertial component module is started, and attitude information measurement can be converged to a true value only after a certain time; the inertial component module 1 can also be replaced by a mechanical gyroscope, the mechanical gyroscope does not need to consume time to determine a zero reference, and the triaxial angular velocity of the projectile body can be sensitively measured immediately after the inertial component module is started.
Acquiring the position and speed information of the aircraft in real time through the satellite guidance module 2; the satellite guidance module mainly comprises: GPS receiver, big dipper receiver, GLONASS receiver, antenna, treater and anti-interference module.
The antenna is designed into four synthetic antennas, and the cross distribution is adopted, so that the capability of capturing satellite signals when an aircraft rolls at a high speed can be improved, the captured satellite signals are transmitted to an anti-interference module for modulating and filtering the signals, and then the signals are transmitted to corresponding satellite receivers according to the corresponding satellite signals. The satellite receiver is composed of a GPS receiver, a Beidou receiver and a GLONASS receiver and is responsible for preprocessing satellite signals and transmitting navigation messages after signal conversion to the processor. The processor calculates and analyzes the received navigation message to obtain the position information of the aircraft and the speed information of the aircraft, and can further obtain information such as the relative distance of the bullet based on the target position. And meanwhile, the relative distance between the missile and the target is obtained through the satellite guidance module 2. In the application, the target position information is pre-stored in the aircraft before the aircraft takes off, the target is captured through the laser guide head in the terminal guidance section, and the target position information is corrected after the target is captured.
Acquiring the missile vision angular velocity in real time after the aircraft enters the terminal guidance section through the laser guidance module 3; the laser guidance module 3 is formed by an external laser target indicator and a laser platform guidance head on the aircraft. The laser target indicator outside the aircraft irradiates the target, the laser platform seeker receives the diffuse reflection laser echo signal of the target through the four-quadrant photoelectric detector assembly, calculates the bullet visual line angle deviation information and the target sight line angle rate, calculates the bullet visual line angle rate, and sends the bullet visual line angle rate to the central processing module as an input quantity.
The central processing module 4 is used for obtaining the overload required by the aircraft in real time according to the received information, decomposing the overload required by the aircraft according to the rolling angle information, generating a rudder deflection instruction, transmitting the rudder deflection instruction to the actuating mechanism, and controlling the actuating mechanism to perform rudder operation. The received information comprises the roll angle of the aircraft provided by the inertial component module 1 in real time, and also comprises the position and speed information of the aircraft provided by the satellite guidance module 2 in real time in the middle guidance section, and the angular rate information of the missile vision provided by the laser guidance module 3 in real time in the terminal guidance section.
In a preferred embodiment, the aircraft is started after the end of the uncontrolled section, and enters the middle guided section; when the aircraft is in the middle guidance section, the central processing module 4 generates the overload required by the guidance law of the overgravity proportion, the aircraft enters a Cheng Huaxiang increasing stage at the moment, when the relative distance of the missile is smaller than 8km, the aircraft enters the terminal guidance section, the laser guidance head captures a target, the central processing module 4 generates the overload required by the guidance law of the novel sliding mode, and the aircraft finally hits the target at a desired falling angle.
In a preferred embodiment, the overgrowth proportional guidance law obtains the required overload by the following formula (one):
Preferably, the relative movement speed of the bullet meshBy relative distance to the bullet eye->Obtaining a derivative;
wherein, the relative distance between the bullet and the eyeObtained by the following formula (II):
In a preferred embodiment, when the mesh is relatively distantWhen the laser guidance module is started, the laser guidance module enters a terminal guidance section, guidance control is performed by adopting a novel sliding mode guidance law, and the novel sliding mode guidance law obtains overload required by the following formula (IV):
and />Each independently representing a design parameter, all positive values; preferably the value is +.>,;
Indicating the expected falling angle, and pre-filling the aircraft in the aircraft before the aircraft takes off;
wherein ,representing design parameters; preferably take the value +.>The method comprises the steps of carrying out a first treatment on the surface of the In this application by setting the design parameters +.>Can control->The upper limit of (2) is not too large to influence the control effect;
representing the gain factor; preferably take the value +.>The method comprises the steps of carrying out a first treatment on the surface of the In this application +_ is determined by setting the gain factor>Approach->Is a speed of (2);
By setting the variable gain in the present applicationReplacing the constant velocity approach law in the traditional scheme, namely eliminating the occurrence of buffeting phenomenon, can lead the constant velocity approach law to have satisfactory convergence rate.
Preferably, the slip form surfaceIs a PID slip plane, which varies with time as shown in the following formula (six):
The upper integral limit in formula (six)Time of presentation->Is-> and />Is->All represent the integrand, and the integrand in equation (six) is still time in particular, so all use +.>And (3) representing.
By arranging the sliding mode surfaceThe method can generate smaller steady-state errors in the process of realizing the sliding mode control, and can also increase the robustness of the sliding mode control.
indicating the angular velocity of the view line of sight of the bullet, which angular velocity of view line of sight of the bullet is +.>Is obtained by a laser guidance module.
Preferably, the function is a function of the control variableObtained by the following formula (eight):
representing a ballistic tilt angle of the aircraft, the ballistic tilt angle being measured by an inertial measurement assembly on the aircraft;
The invention also provides a falling angle constraint control method applied to the remote composite guidance aircraft, which is realized through the control system;
preferably, the method comprises the steps of:
step 1, acquiring the overload needed by the aircraft in real time through the overweight proportion guidance law in the guidance section of the aircraft,
step 2, when the relative distance between the bullets and the eyesAnd when the laser guidance module is started, the laser guidance module enters the terminal guidance section, and the required overload of the aircraft is obtained in real time by adopting a novel sliding mode guidance law.
In the method, the central processing module 4 receives the roll angle information, decomposes the overload to be used based on the roll angle information, generates a rudder deflection instruction, and transmits the rudder deflection instruction to the actuating mechanism to control the actuating mechanism to perform rudder operation.
Preferably, the overload proportional guidance law is obtained by the following formula (one):
Preferably, the relative movement speed of the bullet meshBy relative distance to the bullet eye->Obtaining a derivative;
wherein, the relative distance between the bullet and the eyeObtained by the following formula (II):
The novel sliding mode guidance law obtains the overload needed by the user through the following formula (IV):
and />Each independently representing a design parameter, all positive values; preferably the value is +.>,;
Preferably, the slip form surfaceIs a PID slip plane, which varies with time as shown in the following formula (six):
wherein ,the bullet visual angle is shown; />Indicating the angular velocity of the view line of sight of the bullet, which angular velocity of view line of sight of the bullet is +.>Is obtained by a laser guidance module.
Preferably, the function is a function of the control variableObtained by the following formula (eight):
representing a ballistic tilt angle of the aircraft, the ballistic tilt angle being measured by an inertial measurement assembly on the aircraft;
Examples
Setting the initial position of the aircraft under an inertial coordinate system as the origin of the coordinate system, and setting the initial relative distance of the missile at the terminal guidance stage:the method comprises the steps of carrying out a first treatment on the surface of the Aircraft speed: />The method comprises the steps of carrying out a first treatment on the surface of the Initial ballistic tilt angle of aircraft: />The method comprises the steps of carrying out a first treatment on the surface of the Initial bullet visual angle: />。
The target is a stationary object on the ground.
And the middle guidance section adopts an overweight supplementary proportion guidance law to control the aircraft to glide, namely the required overload of the aircraft is obtained through the following formula (I):
and a novel sliding mode guidance law is adopted in the terminal guidance section to control the aircraft to fly to a target, namely the required overload of the aircraft is obtained through the following formula (IV):
The design is as follows: gain coefficientThe method comprises the steps of carrying out a first treatment on the surface of the Design parameters->、/>、/>。
Desired falling angleI.e. a total of 4 values of the desired landing angle, 4 flight trajectories are obtained correspondingly, as shown in fig. 2.
According to the embodiment, the falling angle constraint control system applied to the remote composite guidance aircraft can control the aircraft to accurately hit a target at a preset falling angle.
Comparative example
The same aircraft, target and test environment as in the examples were selected, the desired landing angle of the aircraft was set to 70 degrees, and the aircraft was guided using substantially the same control scheme as in the examples, except for the variable gainTaking a fixed value, and specifically taking the value as 2; the flight path obtained by controlling the aircraft to fly to the target according to the method is shown in a traditional sliding mode control method curve in fig. 3, and the flight path when the angle of the hope drop is 70 degrees in the embodiment is shown in fig. 3 at the same time, as shown in a novel sliding mode control method curve.
As can be seen from fig. 3, the novel sliding mode guidance law adopted in the terminal guidance section in the present application can improve the hit accuracy of the aircraft, and the aircraft adopting the conventional sliding mode guidance rate can cause the miss result.
The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.
Claims (10)
1. A falling angle constraint control system applied to a remote compound guided vehicle is characterized in that the system comprises,
the inertial component module (1) is used for acquiring the roll angle of the aircraft in real time through the inertial component module (1);
the satellite guidance module (2) is used for acquiring the position and speed information of the aircraft in real time through the satellite guidance module (2);
the laser guidance module (3) is used for acquiring the view line angular rate of the bullet in real time after the aircraft enters the terminal guidance section;
the central processing module (4) is used for obtaining the overload required by the aircraft in real time according to the received information, decomposing the overload required by the aircraft according to the rolling angle information, generating a rudder deflection instruction, transmitting the rudder deflection instruction to the actuating mechanism, and controlling the actuating mechanism to perform rudder operation.
2. The system of claim 1, wherein the system comprises a control system for controlling the landing angle of a remotely compound guided vehicle,
when the aircraft is in the middle guidance section, the central processing module (4) obtains overload through the overweight proportion guidance law,
when the aircraft is in the terminal guidance section, the central processing module (4) obtains the overload through a novel sliding mode guidance law.
3. The system of claim 2, wherein the system comprises a control system for controlling the landing angle of the remotely compound guided vehicle,
the overload proportional guidance law is obtained through the following formula (I):
4. The system of claim 3, wherein the system comprises a control unit for controlling the landing angle of the remotely compound guided vehicle,
the relative movement speed of the bullet meshBy relative distance to the bullet eye->Obtaining a derivative;
wherein, the relative distance between the bullet and the eyeObtained by the following formula (II):
Representing the position coordinates of the aircraft obtained by the satellite guidance module (2);
5. The system of claim 2, wherein the system comprises a control system for controlling the landing angle of the remotely compound guided vehicle,
the novel sliding mode guidance law obtains the overload needed by the user through the following formula (IV):
6. The system of claim 5, wherein the system comprises a control system for controlling the landing angle of the remotely compound guided vehicle,
7. The system for controlling the attitude constraint of a remotely compound guided vehicle according to claim 5 or 6,
8. The system of claim 7, wherein the system comprises a control system for controlling the landing angle of the remotely compound guided vehicle,
10. The system of claim 5, wherein the system comprises a control system for controlling the landing angle of the remotely compound guided vehicle,
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CN111412793A (en) * | 2019-01-08 | 2020-07-14 | 北京理工大学 | Anti-sideslip full-range coverage control system applied to remote guidance aircraft |
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CN111220031A (en) * | 2018-11-26 | 2020-06-02 | 北京理工大学 | Remote guidance aircraft with full range coverage |
CN111377064A (en) * | 2018-12-27 | 2020-07-07 | 北京理工大学 | Satellite-loss-preventing remote guidance aircraft with full range coverage |
CN111397441A (en) * | 2019-01-03 | 2020-07-10 | 北京理工大学 | Full range coverage guidance system for remotely guided vehicles with strapdown seeker |
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