Array type jet flow flight control mechanism

Abstract

The invention relates to the technical field of flow control, in particular to an array type jet flow flight control mechanism which comprises an air source, a jet flow flight control module and an air injection control device matched with the jet flow flight control module. The gas source is arranged in a machine body of the aircraft and used for providing high-pressure gas for the jet flow flight control module; the jet flight control module is arranged at the rear edge of a wing, and controls the flight attitude and flight control of the aircraft through air injection; the jet flight control module comprises a pitching control module, a rolling control module and a yaw control module. According to the method, the aerodynamic performance and the control efficiency of the tailless layout aircraft are remarkably improved by combining an aerodynamic configuration global optimization design method and a'specialized and refined 'thought.

Description

Technical Field

[0001] The present invention relates to the technical field of flow control, and particularly to an array jet flight control mechanism. Background Art

[0002] Tailless layout aircraft have significant advantages in terms of stealth performance, aerodynamic efficiency, and structural efficiency. However, the lack of a vertical tail makes the stability and control efficiency of such aircraft relatively low. Especially in high-speed or high-maneuver flight states, the complexity of flight control increases significantly, and instability phenomena are likely to occur. Therefore, the accuracy and stability issues of the flight control system need to be solved urgently. A potential solution is to adopt the design concept of non-traditional control surfaces such as split rudders and fully movable wingtips, but the opening and closing of mechanical rudders will destroy the stealth advantage of tailless layout aircraft. Another idea is to use jet flight control technology. In recent years, active flow control technology has made remarkable progress in the aerospace field, especially in improving aerodynamic performance and solving flight controllability problems. However, the existing active flow control technology still has several limitations. On the one hand, these technologies often require a large amount of gas supply, which poses higher requirements on the engine intake system. On the other hand, the existing active flow control devices usually can only address a single aerodynamic or control requirement, and the applicable range is relatively narrow; or they expect to meet multiple requirements through a single device, but this design often results in unsatisfactory performance in terms of aerodynamic performance and control efficiency of the device itself. Summary of the Invention

[0003] To solve the deficiencies in the above background art, the present invention provides an array jet flight control mechanism, which significantly improves the aerodynamic performance and control efficiency of tailless layout aircraft by combining the global optimization design method of aerodynamic shape and the "specialization" idea.

[0004] The first object of the present invention is to provide an array jet flight control mechanism for controlling the attitude of an aircraft during flight, including a gas source, a jet flight control module, and a jet control device matching the jet flight control module; The gas source is arranged in the airframe of the aircraft and is used to provide high-pressure gas to the jet flight control module; The jet flight control module is arranged at the trailing edge of the wing and controls the attitude and flight control of the aircraft by jetting; The jet flight control module includes a pitch control module, a roll control module, and a yaw control module; The jet control device is used to adjust the jet-related parameters of different jet flight control modules to control the flight attitude of the aircraft; By adjusting the coordination among the pitch control module, roll control module, and yaw control module, the flight of the aircraft is controlled under complex environmental conditions.

[0005] Preferably, the pitch control module, roll control module, and yaw control module are sequentially arranged at equal intervals and alternately on the trailing edge of the wing.

[0006] Preferably, the pitch control module includes a first upper boundary and a first lower boundary that form a jet slit, wherein the first lower boundary is a Coanda wall surface with a certain curvature formed by a surface protrusion at the edge. The roll control module includes a second upper boundary and a second lower boundary that form a jet slit, wherein the second upper boundary is a Coanda wall surface with a certain curvature formed by a surface protrusion at the edge. The yaw control module includes a third upper boundary and a third lower boundary that form a jet slit.

[0007] The second object of the present invention is to provide an array jet flight control method, which adopts an array jet flight control mechanism, including: Using a jet control device to adjust the jet-related parameters of the pitch control module, roll control module, and yaw control module respectively, changing the pressure distribution on the surface of the aircraft wing, so that the aerodynamic parameters of the aircraft wing approach the aerodynamic parameters required for the flight control target, thereby controlling the flight of the aircraft under complex environmental conditions.

[0008] Preferably, controlling the pitch flight of the aircraft includes: using a jet control device to adjust the jet-related parameters of the pitch control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the pitch moment coefficient of the aircraft wing. Among them, the pitch control module plays a main control role, and the roll control module and yaw control module play an auxiliary control role.

[0009] Preferably, controlling the roll flight of the aircraft includes: using a jet control device to adjust the jet-related parameters of the roll control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the roll moment coefficient of the aircraft wing. Among them, the roll control module plays a main control role, and the pitch control module and yaw control module play an auxiliary control role.

[0010] Preferably, controlling the yaw flight of the aircraft includes: using a jet control device to adjust the jet-related parameters of the yaw control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the yaw moment coefficient of the aircraft wing. Among them, the yaw control module plays a main control role, and the pitch control module and roll control module play an auxiliary control role. The present invention has at least the following beneficial effects: The present invention provides an array-type jet flight control mechanism. By combining the global optimization design method of aerodynamic shape and the idea of "specialization", the aerodynamic performance and control efficiency of tailless aircraft are significantly improved. In the present invention, an efficiently designed jet module effectively replaces the traditional mechanical rudder surface through fine optimization design, avoiding the reduction of stealth performance caused by the opening and closing of the rudder surface, thereby maintaining the excellent stealth characteristics of the aircraft. The jet control module provided by the present invention can be flexibly adjusted according to different flight attitudes and control requirements, ensuring the stability and controllability of the aircraft in high-speed or highly maneuverable flight states, and improving the aerodynamic performance and control efficiency of the aircraft. The "specialized" design of the module and the array layout characteristics of multiple modules reduce the demand for gas volume and enhance the reliability and safety of the control mechanism. The present invention provides an efficient, stable and superior stealth performance flight control solution for tailless aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a conceptual diagram of the array-type jet flight control mechanism; Figure 2 is a schematic diagram of the module layout of the array-type jet flight control mechanism; Figure 3 is a detailed diagram of the array-type jet flight control mechanism; Figure 4 is a working principle diagram of different control modules of the array-type jet flight control mechanism; Figure 5 is a schematic diagram of the working principle of the array-type jet flight control mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] In order to illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will be described in detail in combination with embodiments.

[0013] The array-type jet flight control mechanism described in the present invention includes a gas source, multiple jet flight control modules respectively aimed at different control targets, and a jet control device matching the modules. The gas source is responsible for providing high-pressure gas to the jet flight control module. The jet flight control module is arranged at the trailing edge of the wing and realizes attitude control and flight control through jetting. The jet control device cooperates with the flight control algorithm to control the specific jet parameters to achieve the control of different attitudes and control targets of the aircraft.

[0014] The purpose of the present invention is to provide a jet flight control mechanism that has high control efficiency and good aerodynamic performance for multiple control targets while ensuring stealth performance.

[0015] The present invention first separately designs multiple types of jet flight control modules for different control objectives. By carrying out fine optimization of the geometric shapes of the jet flight control modules for different control objectives, the corresponding high-efficiency jet mechanism shapes are obtained. These mechanisms have extremely high control efficiency for their respective responsible control objectives; then through overall optimization, the layout parameters of different types of jet flight control modules are adjusted to obtain the specific layout parameters of the control modules, such as the number of modules, installation positions, and distances between each other, etc.

[0016] Based on the overall optimization design results, the present invention completes the array layout of the jet flight control mechanism on the tailless aircraft. For the control objectives considered in the geometric shape design of the control module, such as pitching, yawing, and rolling and other control behaviors, precise and efficient control can be achieved by only turning on the corresponding functional jet module and adjusting its gas volume, direction, speed and other parameters. For complex control objectives such as autonomous flight, the control stability and response efficiency for complex control objectives under complex flight conditions can be efficiently achieved by simultaneously coordinating the working parameters of multiple and multiple types of modules. Moreover, since jet control does not involve the opening and closing of control surfaces, it will not affect the radar cross-section of the aircraft, thus further consolidating the stealth advantage of the tailless aircraft.

[0017] To achieve the above object, the present invention provides an array-type jet flight control mechanism for controlling the attitude of an aircraft during flight, including an air source, a jet flight control module, and a jet control device matching the jet flight control module; The air source is arranged in the airframe of the aircraft and is used to provide high-pressure gas to the jet flight control module; The jet flight control module is arranged at the trailing edge of the wing and controls the attitude and flight control of the aircraft by jetting; The jet flight control module includes a pitch control module, a roll control module, and a yaw control module; The jet control device is used to adjust the jet-related parameters of different jet flight control modules to control the flight attitude of the aircraft; By adjusting the combination between the pitch control module, the roll control module, and the yaw control module, the flight of the aircraft under complex environmental conditions is controlled.

[0018] As shown in Figure 1, a conceptual diagram of the array jet flight control mechanism is presented. It includes the jet principle, the air supply idea of the control module, the distribution idea of the control module, and the schematic diagram of the overall mechanism structure. Overall optimization and fine optimization of the geometric shape of the jet mechanism are crucial for improving the efficiency of the array jet flight control mechanism. The fine optimization of the geometric shape of the jet mechanism can ensure that each jet module can achieve the best control efficiency and aerodynamic performance under different flight conditions; while the overall optimization mainly considers the overall aerodynamic performance and control requirements of the aircraft. After completing the design of the control module and jet parameters, flight control is achieved by flexibly combining different control modules. The activation and stop of different types and numbers of control modules can achieve different control objectives, effectively utilizing the high efficiency of the control module.

[0019] As shown in Figure 2, the design idea of the array layout of the control module is presented. By combining control modules that meet different objectives into a single group and arranging multiple groups in an array, a complete array jet flight control mechanism is formed. According to the aerodynamic shape and control requirements of the tailless aircraft, combined with the overall optimization design method, the relevant parameters of the array layout of the jet control module are determined, including the specific number, type, and arrangement position of the jet modules, and the specific configuration method of the jet modules of the aircraft is determined. Specifically, first, a reasonable objective function is constructed for the control efficiency and aerodynamic performance of the aircraft; then, the parameters related to the array layout of the jet control module are set as design variables, such as the layout order of different types of modules and the arrangement position of the whole machine modules; finally, the overall optimization design of the aircraft is carried out, and the optimization results are used as a reference for the array layout of the jet control module.

[0020] The pitch control module, roll control module, and yaw control module are alternately arranged at equal intervals on the trailing edge of the wing in sequence.

[0021] As shown in Figure 3, the structural details of the jet control mechanism composed of control modules with different objectives are presented. The jet control mechanism is composed of control modules with various different control objectives, and each control module realizes the jet function through a jet slit. For the number of control objectives, the corresponding number of control module types can be designed through an optimization design method to improve the control efficiency of each module. All control modules are coupled in the trailing edge structure of the wing, receive high-pressure gas in parallel, and at the same time, different high-pressure gas chambers are separated by a partition layer to supply gas to the jet control mechanism respectively.

[0022] For different control objectives, an optimization design method is adopted to design the most suitable geometric shape and jet characteristics for each jet module. By adopting the "specialized" design concept, it is ensured that each module has high aerodynamic performance and control efficiency in specific tasks. Specifically, different objective functions are designed for different control objectives first; secondly, the design variables that control the geometric shape change of the jet module are reasonably set; then the above information is applied to the geometric shape of the jet module to construct an optimization problem and complete the optimization design; finally, the jet module is constructed using the optimal shape. The jet flight control module is as follows.

[0023] The pitch control module includes a first upper boundary and a first lower boundary that form a jet slit, wherein the first lower boundary is located at the edge where the surface bulges to form a Coanda wall surface with a certain curvature. See Figure 4 As shown in (a) of the figure, a first upper boundary and a first lower boundary that form a jet slit are provided. Among them, at the first lower boundary, the surface bulges at the edge to form a Coanda wall surface with a certain curvature, so that the jet slit and the Coanda wall surface are respectively located on the upper and lower surfaces of the trailing edge of the wing. By adjusting the jet parameters, the surface pressure distribution at the corresponding module position of the wing is changed, and flight pitch control is achieved by cooperating with the roll control module and the yaw control module.

[0024] The roll control module includes a second upper boundary and a second lower boundary that form a jet slit, wherein the second upper boundary is located at the edge where the surface bulges to form a Coanda wall surface with a certain curvature. See Figure 4 As shown in (b) of the figure, a second upper boundary and a second lower boundary that form a jet slit are provided. Among them, at the second upper boundary, the surface bulges at the edge to form a Coanda wall surface with a certain curvature, so that the jet slit and the Coanda wall surface are respectively located on the lower and upper surfaces of the trailing edge of the wing. By adjusting the jet parameters, the surface pressure distribution at the corresponding module position of the wing is changed, and flight roll control is achieved by cooperating with the pitch control module and the yaw control module.

[0025] The yaw control module includes a third upper boundary and a third lower boundary that form a jet slit. See Figure 4 As shown in (c) of the figure, the jet slit is located in the middle of the trailing edge of the wing. By adjusting the jet parameters, the surface pressure distribution at the corresponding module position of the wing is changed, and flight yaw control is achieved by cooperating with the pitch control module and the roll control module.

[0026] An array jet flight control method of the present invention adopts the above-mentioned array jet flight control mechanism, including: The jet control device is used to adjust the jet-related parameters of the pitch control module, roll control module, and yaw control module respectively, change the pressure distribution on the wing surface of the aircraft, and make the aerodynamic parameters of the aircraft wing approach the aerodynamic parameters required by the flight control target, so as to control the flight of the aircraft under complex environmental conditions.

[0027] For actual flight attitude control, the control module changes the jet-related parameters such as the air input volume of the air source and the jet angle of the control module through the jet control device, and changes the wing aerodynamic parameters by changing the pressure distribution on the wing surface, so as to approach the aerodynamic parameters required by the flight control target. The specific change is achieved by coordinating the pitch control module, roll control module, and yaw control module. The jet parameters of each control module may be different from each other to achieve flight control under complex conditions.

[0028] As shown in Figure 5, it shows the principle of the array jet flight control mechanism to achieve different control objectives. By enabling the control modules of different objectives, the flight attitude can be changed to achieve the corresponding objectives. The efficiently arranged array jet flight control mechanism can efficiently achieve flight attitude control by enabling different combinations of control modules. Specifically, the array concept can accurately adjust the working parameters of the jet module according to the real-time state and control requirements of the aircraft to ensure the efficient control and stability of the aircraft in various flight tasks. For example, for control objectives such as yaw and pitch that are pre-designed into the module, precise and efficient control can be achieved by only turning on the corresponding function jet module and adjusting its gas volume, direction, speed and other parameters. For complex control objectives such as autonomous flight, the working parameters of multiple and multiple types of modules can be coordinated simultaneously to efficiently achieve the control stability and response efficiency for complex control objectives under complex flight conditions. Moreover, since jet control does not involve the opening and closing of the rudder surface, it will not affect the radar cross-section of the aircraft, so it further consolidates the stealth advantage of the tailless layout aircraft.

[0029] In this embodiment, controlling the pitch flight of the aircraft includes: using the jet control device to adjust the jet-related parameters of the pitch control module, changing the pressure distribution on the wing surface of the aircraft, and adjusting the pitch moment coefficient of the aircraft wing. Among them, the pitch control module plays a major control role, and the roll control module and yaw control module play an auxiliary control role.

[0030] Specifically, the pitch control module changes the jet-related parameters such as the air input volume of the air source and the jet angle of the control module through the jet control device, and adjusts the pitch moment coefficient of the wing by changing the pressure distribution on the wing surface. Among them, the pitch control module plays a major control role, and the roll control module and yaw control module play an auxiliary control role.

[0031] In this embodiment, controlling the roll flight of the aircraft includes: using a jet control device to adjust the jet-related parameters of the roll control module, changing the pressure distribution on the wing surface of the aircraft, and adjusting the roll moment coefficient of the aircraft wing. Among them, the roll control module plays a primary control role, and the pitch control module and the yaw control module play an auxiliary control role. Specifically, the roll control module changes the jet-related parameters such as the air input volume of the air source and the jet angle of the control module through the jet control device, and adjusts the roll moment coefficient of the wing by changing the pressure distribution on the wing surface. Among them, the roll control module plays a primary control role, and the pitch control module and the yaw control module play an auxiliary control role.

[0032] In this embodiment, controlling the yaw flight of the aircraft includes: using a jet control device to adjust the jet-related parameters of the yaw control module, changing the pressure distribution on the wing surface of the aircraft, and adjusting the yaw moment coefficient of the aircraft wing. Among them, the yaw control module plays a primary control role, and the pitch control module and the roll control module play an auxiliary control role. Specifically, the yaw control module changes the jet-related parameters such as the air input volume of the air source and the jet angle of the control module through the jet control device, and adjusts the yaw moment coefficient of the wing by changing the pressure distribution on the wing surface. Among them, the yaw control module plays a primary control role, and the pitch control module and the roll control module play an auxiliary control role.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An array-type jet flight control mechanism, characterized in that For controlling the attitude of an aircraft during flight, it includes an air source, a jet flight control module, and a jet control device that matches the jet flight control module; The air source is arranged in the fuselage of the aircraft and is used to provide high-pressure gas to the jet flight control module; The jet flight control module is arranged at the trailing edge of the wing and controls the attitude and flight control of the aircraft by jetting; The jet flight control module includes a pitch control module, a roll control module, and a yaw control module; The jet control device is used to adjust the jet-related parameters of different jet flight control modules to control the flight attitude of the aircraft; By adjusting the combination among the pitch control module, the roll control module, and the yaw control module, the flight of the aircraft under complex environmental conditions is controlled.

2. The array jet flight control mechanism according to claim 1, characterized in that The pitch control module, the roll control module, and the yaw control module are arranged at equal intervals and alternately on the trailing edge of the wing in sequence.

3. The array-type jet flight control mechanism according to claim 1, characterized in that The pitch control module includes a first upper boundary and a first lower boundary that form a jet slit, wherein the first lower boundary is a Coanda wall surface with a certain curvature formed by a surface protrusion at the edge; The roll control module includes a second upper boundary and a second lower boundary that form a jet slit, wherein the second upper boundary is a Coanda wall surface with a certain curvature formed by a surface protrusion at the edge; The yaw control module includes a third upper boundary and a third lower boundary that form a jet slit.

4. An array jet flight control method, characterized in that, Adopting the array-type jet flight control mechanism according to any one of claims 1 to 3, it includes: Using the jet control device to adjust the jet-related parameters of the pitch control module, the roll control module, and the yaw control module respectively, changing the pressure distribution on the surface of the aircraft wing, so that the aerodynamic parameters of the aircraft wing approach the aerodynamic parameters required by the flight control target, thereby controlling the flight of the aircraft under complex environmental conditions.

5. The array jet flight control method according to claim 4, characterized in that Controlling the pitch flight of the aircraft includes: using the jet control device to adjust the jet-related parameters of the pitch control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the pitch moment coefficient of the aircraft wing. Among them, the pitch control module plays a main control role, and the roll control module and the yaw control module play an auxiliary control role.

6. The array jet flight control method according to claim 4, wherein Controlling the roll flight of the aircraft includes: using the jet control device to adjust the jet-related parameters of the roll control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the roll moment coefficient of the aircraft wing. Among them, the roll control module plays a main control role, and the pitch control module and the yaw control module play an auxiliary control role.

7. The array jet flight control method according to claim 4, characterized in that Controlling the yaw flight of the aircraft includes: using the jet control device to adjust the jet-related parameters of the yaw control module, changing the pressure distribution on the surface of the aircraft wing, and adjusting the yaw moment coefficient of the aircraft wing. Among them, the yaw control module plays a main control role, and the pitch control module and the roll control module play an auxiliary control role.

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