CN111564083A - Aircraft aerodynamic physical simulation system - Google Patents
Aircraft aerodynamic physical simulation system Download PDFInfo
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- CN111564083A CN111564083A CN202010300940.8A CN202010300940A CN111564083A CN 111564083 A CN111564083 A CN 111564083A CN 202010300940 A CN202010300940 A CN 202010300940A CN 111564083 A CN111564083 A CN 111564083A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/10—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer with simulated flight- or engine-generated force being applied to aircraft occupant
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/30—Simulation of view from aircraft
- G09B9/307—Simulation of view from aircraft by helmet-mounted projector or display
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Abstract
The embodiment of the invention discloses an aircraft aerodynamic physical simulation system, which comprises a computer auxiliary system, a VR display module and a wing simulation module, wherein the computer auxiliary system is respectively communicated with the VR display module and the wing simulation module; the wing simulation module is used for determining stress data of a flight simulator according to environmental data of a preset virtual flight scene and applying the stress data to a physical model corresponding to the flight simulator to obtain motion data of the flight simulator; the computer-aided system constructs the motion data in a preset virtual flight scene and projects the virtual flight scene to the VR display module. The virtual reality technology is combined with the aerodynamic physical simulation technology for the flight simulator, so that real, immersive, situational and participatory experiences are provided, and the effect of simulation training is improved.
Description
Technical Field
The invention relates to the field of flight simulation, in particular to an aircraft aerodynamic physical simulation system.
Background
The virtual reality is that a virtual world of a three-dimensional space is generated by utilizing equipment, a virtual reality helmet is worn, a user feels like being personally on the scene, a virtual scene can be freely watched and felt in the virtual space, and interaction can be carried out with the virtual scene.
The virtual reality technology (VR) is an important direction of simulation technology, is a collection of various technologies such as simulation technology and computer graphics man-machine interface technology multimedia technology sensing technology network technology, and is a challenging cross-technology frontier subject and research field. The virtual reality technology mainly comprises the aspects of simulating environment, perception, natural skill, sensing equipment and the like.
Simulation training has become an important issue in military and aerospace. The problems of cost and safety risk exist in pilot training, a training scene, immersion type, situational type and participatory type experience can be really constructed through a virtual reality technology, the training effect is improved, and the safety risk of training is reduced to the lowest.
The traditional visual effect of flight simulation training is usually realized by combining a single screen or a plurality of screens, and the scheme does not have enough sense of reality and immersion, so that the real flight training effect is difficult to achieve.
Disclosure of Invention
In view of the above technical problems, an embodiment of the present invention provides an aircraft aerodynamic physical simulation system.
The embodiment of the invention provides an aircraft aerodynamic physical simulation system, which comprises a computer auxiliary system, a VR display module and a wing simulation module, wherein the computer auxiliary system is respectively communicated with the VR display module and the wing simulation module;
the wing simulation module is used for determining stress data of a flight simulator according to environmental data of a preset virtual flight scene and applying the stress data to a physical model corresponding to the flight simulator to obtain motion data of the flight simulator;
the computer-aided system constructs the motion data in a preset virtual flight scene and projects the virtual flight scene to the VR display module.
Optionally, the wing simulation module comprises a wing surface simulation module, a control surface simulation module and a slipstream simulation module;
the wing surface simulation module is used for fitting stress data of the wing surface of the wing, enabling the stress data of the wing surface of the wing to be consistent with a preset airplane model, and selecting corresponding lift coefficient, drag coefficient and moment coefficient according to the wing profile;
the control surface simulation module is used for simulating stress data of a flight control surface, so that the stress data of the flight control surface is consistent with the stress data of the flight control surface of a preset airplane model in size;
the slipstream simulation module is used for simulating slipstream data, and the slipstream data comprises slipstream flow speed and/or slipstream direction.
Optionally, the force data includes lift force and resistance force, and the calculation formula of the lift force and the resistance force is as follows:
Y＝2ρC1Sv2；
wherein Y is lift or drag;
ρ is the atmospheric density;
c is a mechanical coefficient, and when Y is a lift force, C is the lift force coefficient of different positions of each wing profile; when Y is resistance, C is a resistance coefficient; and when Y is the lift or drag of the wing, C is positively correlated with the slipstream data;
s is the area of a flight control surface or a wing;
v is the speed of the aircraft.
Optionally, the flight control surface comprises movable wing surfaces hinged on the wing, horizontal tail and vertical tail of the flight simulator.
Optionally, the movable airfoil comprises an elevator, an aileron and a rudder.
Optionally, the movable airfoil further comprises a leading edge slat, a flap, and a spoiler.
Optionally, the movable airfoil further comprises a canard.
Optionally, the VR display module is a VR headset or VR glasses.
According to the technical scheme provided by the embodiment of the invention, the virtual reality technology and the aerodynamic physical simulation technology for the flight simulator are combined, so that real, immersive, situational and participatory experiences are provided, and the effect of simulation training is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an aircraft aerodynamic physics simulation system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of an aircraft aerodynamic physical simulation system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a work flow of an aircraft aerodynamic physical simulation system according to an embodiment of the present invention.
Reference numerals:
1: a computer-assisted system; 2: a VR display module; 3: a wing simulation module; 31: an airfoil simulation module; 32: a control surface simulation module; 33: and a slipstream simulation module.
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.
It should be noted that the following embodiments may be combined without conflict.
Referring to fig. 1, an embodiment of the present invention provides an aircraft aerodynamic physical simulation system, which may include a computer-aided system 1, a VR display module, and a wing simulation module 3, where the computer-aided system 1 is in communication with the VR display module 2 and the wing simulation module 3, respectively.
The wing simulation module 3 is configured to determine stress data of a flight simulator according to environment data of a preset virtual flight scene, and apply the stress data to a physical model corresponding to the flight simulator to obtain motion data of the flight simulator, where the motion data may include basic data of the flight simulator and data generated by control of the flight simulator during flight, and main data of the motion data includes maneuvering speed of the flight simulator, maximum cruising speed of the flight simulator, maximum speed of a flap when being put down, maximum undercarriage retracting speed, maximum speed of the landing gear when being put down, minimum speed of the flight simulator when taking off, acceleration of the flight simulator, flight direction of the flight simulator, and a turning angle of the flight simulator; the computer-assisted system 1 constructs the motion data in a preset virtual flight scene, and the process of constructing the specific motion data may include: the airfoil simulation module 31 visually adjusts physical model data of the airfoil through an editor, keeps the same with an actual airplane model, and then selects corresponding lift coefficient (Cl), drag coefficient (Cd) and moment coefficient (Cm) curves according to the airfoil. Because the wing is not a regular object, the same value cannot be used for processing, but the computer-aided system 1 cannot calculate all values on the function curve, so the computer-aided system 1 can divide the wing surface into a plurality of segments by using an algorithm, and calculate each segment of the wing surface respectively to fit the real stress condition of the wing surface. The control is carried out by each large module in software to influence various states in the flight, such as a fuel system and an engine system in the software to influence the maneuvering performance of a flight simulator; the wing profile system and the control system control the flight state of the flight simulator in each flight state; the weather system, the weapon system, the power system and other major systems all influence various states of the flight simulator, change the flight attitude through the data control of the flight, present different flight visual scenes through the flight attitude, and finally project the virtual flight scene onto the VR display module 2.
The aircraft aerodynamic physical simulation system provided by the embodiment of the invention combines the virtual reality technology with the aerodynamic physical simulation technology for the flight simulator, provides real, immersive, situational and participatory experiences, and improves the effect of simulation training.
Optionally, the computer-aided system 1 includes a plurality of hosts, one of the hosts serves as a server, the other hosts serve as clients, and the servers control the plurality of clients, each of the clients communicating with one VR display module 2.
The user can set a virtual flight scene on the server, and then the virtual flight scene is presented through the client. For example, the user may select one or more of a model, environmental parameters, wind parameters, characteristic parameters, idiosyncratic training patterns, hardware detection, grouping information, data storage information, and weapons ammunition information, among others. After the model is set, the client presents the flight simulator corresponding to the currently set model information. The environmental parameters are used to indicate terrain information and weather information for the virtual flight scenario. The wind power parameters are used for indicating wind directions and/or wind speeds of different height positions in the virtual flight scene, so that the resistance or thrust of the flight simulator at different heights is influenced, and the flight simulator is more appropriate to the real flight environment. The characteristic parameters are used for indicating whether to set up a virtual airplane in the virtual flight scene so as to increase the difficulty of simulation training. The special situation training mode comprises the following steps: the training mode that no trouble appears in flight simulator flight in-process (under this training mode, flight simulator normal flight, flight simulator's hardware structure and software operation are all normal), the training mode that random fault appears in flight simulator flight in-process (under this training mode, flight simulator normal flight and special condition appear at random, flight simulator breaks down at random in flight in-process), the training mode that preset trouble appears in flight simulator flight in-process (under this training mode, flight simulator appears appointed special condition, flight simulator appears appointed trouble in-process in flight), special condition training is very important, how the training pilot meets various circumstances and deals with in flight. The hardware detection mainly comprises the steps of firstly detecting whether each hardware device is normally connected and returned when the system is operated, and resetting the state of the hardware device. The grouping information may include: optionally, the setting of the grouping information may set the shift entry and the equipment arrangement, and record the feedback and the record of the relevant data such as the corresponding machine number, the name, the convenience score and the like to the trainers participating in the training. The data storage information includes: the current training parameters, the performance data and the physiological parameters of the current trainer, the data access information, namely all parameters set by the server and the performance after training, are accessed through the database, the defects of the trainer are favorably analyzed, the data can be used for training, and the qualified pilot who can win the battle can be achieved. The weapon ammunition information comprises at least one of mounted missile training, air launching target hitting training, air combat training and tactical drilling, wherein the mounted missile training, the air launching target hitting training, the air combat training and the tactical drilling are all existing tactical training modes; of course, the weapon ammunition information can also be set into other tactical training modes. It will be appreciated that when not set, the virtual flight scenario selects the default scenario.
The environmental data may include, among other things, weather information, terrain information, wind direction, etc. of the virtual flight environment.
Referring to fig. 2, the wing simulation module 3 includes a wing simulation module 31, a control surface simulation module 32, and a slipstream simulation module 33, where the wing simulation module 31 is configured to fit stress data of a wing surface of a wing, so that the stress data of the wing surface of the wing is consistent with a preset airplane model, and then a corresponding lift coefficient, a drag coefficient, and a moment coefficient are selected according to the wing profile. The control surface simulation module 32 is configured to simulate stress data of a flight control surface, so that the stress data of the flight control surface is consistent with the stress data of the flight control surface of a preset airplane model. The slipstream simulation module 33 is configured to simulate slipstream data, which includes slipstream flow rate and/or slipstream direction.
In fact, the stress data of the flight control surface is data related to essential conditions of the flight simulator during takeoff, such as the lowest speed during takeoff, the minimum thrust required by the flight simulator from sliding to takeoff, and the like; the stress data of the wing surface is the stress data of the wing surface when the relevant modules such as the artificial control wing and the like are passed, namely the stress data of the wing surface when the flight simulator is in a normal flight state, and at the moment, the stress data of the wing surface can be changed under the influence of factors such as height, airflow, weather and the like.
The stress data comprises lift and resistance of the wing surface of the wing and lift and resistance of the flight control surface, and the lift and resistance of the flight control surface comprise forces brought by the control of the wing, so that the lift and resistance of the flight control surface and the lift and resistance of the wing surface of the wing are actually the same forces.
Specifically, the calculation formula of the lift force and the resistance force is as follows:
in the formula (1), Y is the lift force or the resistance force of the flight control surface; ρ is the atmospheric density; c is a mechanical coefficient, and when Y is the lift force of the flight control surface, C is the lift force coefficient of different positions of each wing profile; when Y is the resistance of the flight control surface, C is the resistance coefficient; s is the area of the flight control surface; v is the speed of the aircraft.
The control surface simulation module 32 is a module that simulates the flight control surfaces of a wing, which may be hinged to movable airfoils on the wing, horizontal tail and vertical tail that are used to operate the flight simulator when the flight simulator is flying and jogging at ground speed. Optionally, the movable airfoils comprise primary control surfaces such as elevators, ailerons and rudders. Optionally, the movable airfoil further comprises auxiliary control surfaces such as slats, flaps and spoilers. Optionally, the movable airfoil further comprises a special control surface such as a canard.
The aircraft aerodynamic physical simulation system provided by the embodiment of the invention can be used for adjusting the control surface data visually through the editor, so that the control surface of the flight simulator is completely overlapped with the actual aircraft model. Because the control surface is not a regular object, the same numerical value cannot be used for processing, but the computer-aided system 1 cannot calculate all values on a function curve (a lift coefficient curve or a resistance coefficient curve), so the computer-aided system 1 divides the control surface into a plurality of segments by using an algorithm, calculates the control surface for each segment, and fits the real stress condition of each segment of the control surface. The computer-aided system 1 is associated with the input device through the script, and controls the control surface through the input of the user on the input device, thereby achieving the effect of simulating the control of the flight simulator.
The slipstream simulation module 33 is to simulate the effect of slipstream on the flight of the flight simulator, and the slipstream is an air flow that is disturbed by the propeller behind the propeller disk. The axial flow velocity of the slip flow is larger than the incoming flow velocity far away, and the slip flow also has certain rotary motion, and the streamline of the slip flow is spiral. Due to the large velocity of the flow in the slipstream, the lift of the section of the wing submerged in the slipstream is larger than it would be without the slipstream. Slipstreaming also causes changes in the magnitude and direction of the air flow velocity in the tail region, thereby affecting the aerodynamic forces acting on the tail.
Specifically, the slipstream simulation module 33 adjusts parameters according to the model (the model can be selected by the user on the computer-aided system 1), and simulates the slipstream influence effect of different models. In order to simplify the operation and achieve the purpose of optimization, in the process of processing by the airfoil simulation module 31, the slipstream data is directly obtained from the slipstream simulation module 33, the stress condition of the airfoil after being influenced by the slipstream is determined, and extra performance overhead caused by multiple times of applying force is avoided. The vortex formed behind the propeller can change the downstream flow field and deflect the streamline of the surface of the wing, the pressure distribution on the surface of the wing can be obviously changed by the slipstream of the propeller, the whole lift and the resistance coefficient are increased, and the effect is more obvious when the slipstream strength is higher.
The airfoil simulation module 31 visually adjusts physical model data of the airfoil through an editor, keeps the same with an actual airplane model, and then selects corresponding lift coefficient (Cl), drag coefficient (Cd) and moment coefficient (Cm) curves according to the airfoil. Because the wing is not a regular object, the same value cannot be used for processing, but the computer-aided system 1 cannot calculate all values on the function curve, so the computer-aided system 1 can divide the wing surface into a plurality of segments by using an algorithm, and calculate each segment of the wing surface respectively to fit the real stress condition of the wing surface.
The computer-aided system 1 constructs the motion data obtained by the wing simulation module 3 in a virtual scene and projects the motion data to the VR display module 2. The computer-assisted system 1 also provides an input interface for the user to control the movement of the flight simulator. If the control surface simulation module 32 is a module for simulating a control surface of a wing, the control data is transmitted to the computer-aided system 1 through external hardware, the motion data is obtained through processing, and then a virtual flight scene is constructed according to the motion data.
The VR display module 2 is a module for experiencing a virtual reality environment, and a user immerses into a virtual scene constructed by the computer auxiliary system 1 through the VR display module 2. Optionally, the VR display module 2 is a VR helmet or VR glasses.
Further, the aircraft aerodynamic physical simulation system further comprises a simulation input module, the simulation input module can comprise a steering wheel, a control rod, an accelerator, pedals and other simulation aircraft operation modules, and the simulation input module is communicated with the computer auxiliary system 1. The pilot can use the simulation input module to control and simulate the control of the flight simulator, so that the feeling as if the pilot is in the cockpit of the airplane is realized.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An aircraft aerodynamic physical simulation system, comprising a computer-assisted system, a VR display module and a wing simulation module, the computer-assisted system being in communication with the VR display module and the wing simulation module, respectively;
the wing simulation module is used for determining stress data of a flight simulator according to environmental data of a preset virtual flight scene and applying the stress data to a physical model corresponding to the flight simulator to obtain motion data of the flight simulator;
the computer-aided system constructs the motion data in a preset virtual flight scene and projects the virtual flight scene to the VR display module.
2. The aircraft aerodynamic physical simulation system of claim 1, wherein the wing simulation module comprises a wing simulation module, a control surface simulation module, and a slipstream simulation module;
the wing surface simulation module is used for fitting stress data of the wing surface of the wing, enabling the stress data of the wing surface of the wing to be consistent with a preset airplane model, and selecting corresponding lift coefficient, drag coefficient and moment coefficient according to the wing profile;
the control surface simulation module is used for simulating stress data of a flight control surface, so that the stress data of the flight control surface is consistent with the stress data of the flight control surface of a preset airplane model in size;
the slipstream simulation module is used for simulating slipstream data, and the slipstream data comprises slipstream flow speed and/or slipstream direction.
3. An aircraft aerodynamic physics simulation system according to claim 1 or 2 wherein said force data comprises lift and drag forces, said lift and drag forces being calculated by the formula:
wherein Y is lift or drag;
ρ is the atmospheric density;
c is a mechanical coefficient, and when Y is a lift force, C is the lift force coefficient of different positions of each wing profile; when Y is resistance, C is a resistance coefficient; and when Y is the lift or drag of the wing, C is positively correlated with the slipstream data;
s is the area of a flight control surface or a wing;
v is the speed of the aircraft.
4. An aircraft aerodynamic physical simulation system according to claim 2, wherein the flight control surfaces comprise movable wing surfaces hinged on the wings, horizontal tail and vertical tail of the flight simulator.
5. An aircraft aerodynamic physical simulation system according to claim 4, wherein the movable airfoils comprise elevators, ailerons and rudders.
6. An aircraft aerodynamic physical simulation system according to claim 5, wherein the movable airfoil further comprises a leading edge slat, flap and spoiler.
7. An aircraft aerodynamic physical simulation system according to claim 5, wherein the movable airfoil further comprises a canard.
8. The aircraft aerodynamic physical simulation system of claim 1, wherein the VR display module is a VR headset or VR glasses.
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