A method and system for reproducing a target waveform for a gust generator
Patent Information
- Application Number
- CN202611239833.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-17
- Publication Date
- 2026-11-03
AI Technical Summary
Existing gust generators cannot directly reproduce complex unsteady waveforms, and their frequency response range and mechanical actuation capabilities limit their ability to simulate non-periodic, multi-frequency superposition gusts.
By constructing a standard trigonometric function waveform-application parameter group mapping relationship, the target gust waveform is decomposed into multiple trigonometric function waveforms. Based on the mapping relationship, the application parameter group is matched to generate the decomposed application signal. The total application signal is obtained by superposition calculation to control the gust generator to reproduce the target waveform. Mechanical limitations are considered to perform smoothing processing to ensure feasibility.
It achieves near-perfect reproduction of complex unsteady target gust waveforms, improves the accuracy and engineering applicability of the simulation, and ensures that the similarity between the control signal and the initial signal is over 95%.
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Abstract
Description
Technical Field
[0001] This application relates to the fields of fluid mechanics and mechanics, and in particular to a method and system for reproducing target waveforms for gust generators. Background Technology
[0002] In wind tunnel gust simulation experiments, gust generators are typically used to disturb the incoming airflow in the wind tunnel, creating an unsteady flow field with specific velocity variation characteristics within the test section. This is used to study and verify aircraft gust response, flight stability, and control law robustness. However, existing gust generators, due to the structural limitations of their actuators or control program constraints, can generally only produce standard gust disturbances such as sinusoidal or step gusts. In more precise wind tunnel tests or engineering studies, the simulated gusts are often not simple, regular waveforms, but rather complex, unsteady waveforms derived from flight data, atmospheric disturbance data, mission profile settings, or other engineering requirements. These gust disturbance waveforms typically exhibit non-periodicity, multiple frequency superpositions, local abrupt changes, or other complex time-domain characteristics, making them difficult to directly input and reproduce using existing gust generator control programs.
[0003] The main reasons hindering the development of this technology are as follows. First, the target waveform to be achieved is generally a speed variation curve collected by various sensors, and there is a lack of a suitable conversion system to transform it into control parameters for the gust generator. Second, commonly used gust generators have physical frequency response ranges, and their maximum driving speed and driving force are limited by the actuation mechanism, making it difficult to completely reproduce the sudden components in the gust.
[0004] Therefore, there is an urgent need for a method to decompose and reproduce arbitrary waveform gusts suitable for wind tunnel gust simulation experiments, which would solve the problem that existing methods cannot convert complex unsteady waveforms into control signals that can be executed by gust generators, thus failing to meet the mechanical actuation limitations of gust generators. Summary of the Invention
[0005] The purpose of this application is to provide a method and system for reproducing target waveforms for gust generators. This method can convert any input complex unsteady target gust waveform into an executable control sequence for the gust generator after engineering processing, and achieve approximate reproduction of the target waveform within the mechanical actuation capability of the gust generator, thereby improving the feasibility, accuracy and engineering applicability of complex gust simulation.
[0006] To achieve the above objectives, this application provides the following solution: Firstly, this application provides a method for reproducing a target waveform for a gust generator, comprising: A standard trigonometric function waveform-aperture parameter set mapping relationship is constructed; the actuation parameter set includes the actuation frequency, blade swing angle and phase parameters of the gust generator. Obtain the target gust waveform; The target gust waveform is decomposed to obtain multiple decomposed waves; the decomposed waves are trigonometric function waveforms; different trigonometric function waveforms have different waveform characteristics; the waveform characteristics include frequency, amplitude and phase; Based on the standard trigonometric function waveform-actuation parameter group mapping relationship, match the actuation parameter group corresponding to each decomposed wave; Based on the actuation timing and actuation parameter group corresponding to each decomposed wave, the actuation signal of each decomposed wave is determined as the decomposed actuation signal; The total actuation signal is obtained by superimposing all the decomposed actuation signals according to the actuation timing corresponding to different decomposed waves; the total actuation signal is used to control the gust generator to reproduce the target gust waveform.
[0007] Optionally, the total actuation signal is obtained by superimposing all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves, specifically including: The initial total actuation signal is obtained by superimposing all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves. The initial total actuation signal is smoothed and its feasibility is determined to obtain the undetermined total actuation signal. Calculate the similarity between the undetermined total actuation signal and the initial total actuation signal; Based on the similarity and the similarity set value, the total actuation signal is determined.
[0008] Optionally, the initial total actuation signal is smoothed and its feasibility is determined to obtain a pending total actuation signal, specifically including: The initial total actuation signal is smoothed to obtain a smoothed total actuation signal; Based on the mechanical limitations of the gust generator, a feasibility assessment of the smoothing total actuation signal was conducted, and the first assessment result was obtained. If the first judgment result is negative, then return to the step "smooth the initial total actuation signal to obtain a smoothed total actuation signal"; If the first judgment result is yes, then the smooth total actuation signal is determined as the undetermined total actuation signal.
[0009] Optionally, based on the similarity and the similarity set value, the total actuation signal is determined, specifically including: Determine whether the similarity is greater than the set similarity value to obtain a second determination result; If the second judgment result is negative, it is determined that the target gust waveform is mechanically limited by the gust generator; If the second judgment result is yes, then the undetermined total actuation signal is determined to be the total actuation signal.
[0010] Optionally, after determining that the pending total actuation signal is the total actuation signal, the method further includes: The target gust waveform is reproduced by controlling the gust generator using the overall actuation signal.
[0011] Secondly, this application provides a system for reproducing the target waveform of a gust generator, comprising: The mapping relationship construction module is used to construct the standard trigonometric function waveform-actuation parameter group mapping relationship; The target waveform acquisition module is used to acquire the target gust waveform; The target waveform decomposition module is used to decompose the target gust waveform to obtain multiple decomposed waves; the decomposed waves are trigonometric function waveforms; different trigonometric function waveforms have different waveform characteristics; the waveform characteristics include frequency, amplitude and phase; The decomposed wave and actuation parameter matching module is used to match the actuation parameter group corresponding to each decomposed wave based on the standard trigonometric function waveform-aperture parameter group mapping relationship; The decomposed actuation signal determination module is used to determine the actuation signal of each decomposed wave as the decomposed actuation signal based on the actuation timing and actuation parameter group corresponding to each decomposed wave. The total actuation signal determination and waveform reproduction module is used to superimpose and calculate all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves to obtain the total actuation signal; the total actuation signal is used to control the gust generator to reproduce the target gust waveform.
[0012] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a method and system for reproducing target waveforms for gust generators. By decomposing the acquired target gust waveform into multiple trigonometric function waveforms, it achieves the conversion of complex target waveforms into multiple analyzable and processable basic waveform components, solving the problem in existing technologies where arbitrary complex and unsteady target gust waveforms are difficult to directly use as control inputs for gust generators. By generating basic actuation signals based on the actuation parameters and timing of each decomposed waveform, and then calculating the final actuation signal of the gust generator through superposition, it achieves the approximate reproduction effect of non-standard, non-periodic, and complex target gust waveforms, solving the problem in existing technologies where gust generators are difficult to engineer and output complex target gusts. Through initial total actuation... The motion signal is smoothed, and the feasibility of the smoothed total motion signal is judged based on the mechanical limitations of the gust generator. This ensures that the target waveform can be reproduced within the mechanical capability of the gust generator, and that the resulting total motion signal is practically feasible. By limiting the similarity between the undetermined total motion signal and the initial total motion signal, the similarity between the actual control signal and the initial total motion signal is maintained at over 95%, improving the accuracy of waveform reproduction. Therefore, this application can convert any input complex unsteady target gust waveform into a control sequence executable by the gust generator after engineering processing, and achieve approximate reproduction of the target waveform within the mechanical actuation capability of the gust generator, improving the feasibility, accuracy, and engineering applicability of complex gust simulation. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a flowchart illustrating a method for reproducing a target waveform for a gust generator according to an embodiment of this application. Figure 2 This is a schematic flowchart illustrating the method for reproducing arbitrary target waveforms in one embodiment of this application. Figure 3 This is a waveform decomposition diagram of a method for reproducing the target waveform of a gust generator according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating a method for reproducing a target waveform gust by controlling a gust generator to generate a target waveform gust, as described in one embodiment of this application. Detailed Implementation
[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] In one exemplary embodiment, such as Figure 1 As shown, a method for reproducing the target waveform of a gust generator is provided, including the following steps 101 to 106. A detailed flowchart of the target waveform reproduction method is shown below. Figure 2 As shown. Wherein: Step 101: Construct a standard trigonometric function waveform-aperture parameter set mapping relationship. The actuation parameter set includes the actuation frequency, blade swing angle, and phase parameters of the gust generator, as shown in the following expression: .
[0018] in, Represents the standard trigonometric function waveform. Represents the mapping relationship of control parameter groups This represents the operating frequency of the gust generator. This represents the maximum swing angle of the gust generator blades. This represents the initial phase of the gust generator's operation.
[0019] Step 101 specifically includes: performing phase averaging and other processing on multiple sets of pre-collected standard gust waveforms to obtain a series of standard trigonometric function waveforms; systematically studying the flow field waveform law generated by the gust generator in the wind tunnel test section, and examining the influence of different actuation parameters (including actuation frequency, blade swing angle, initial phase, etc.) on the waveform; statistically analyzing the flow field waveform response results under different actuation parameter conditions of multiple sets of gust waveform data, and establishing a mapping relationship from the decomposed standard trigonometric function waveforms to the actuation parameter group of the gust generator, that is, forming a standard trigonometric function waveform-actuation parameter group mapping relationship.
[0020] Step 102: Obtain the target gust waveform.
[0021] Step 103: Decompose the target gust waveform to obtain multiple decomposed waves, such as... Figure 3 As shown, the decomposed wave is a trigonometric function waveform; different trigonometric function waveforms have different waveform characteristics, including frequency, amplitude, and phase, as expressed below: .
[0022] in, Represents the original vertical gust waveform. Represents the average vertical gust speed. This represents the number of items being decomposed. Represents the decomposition of the first The amplitude of the decomposed wave, Representing the The frequency of the decomposed wave, Representing the The initial phase of the decomposed wave.
[0023] Step 103 specifically includes: The target gust waveform can be a target gust in a preset function form, measured flight data, atmospheric disturbance data, or an arbitrary velocity-time discrete signal manually set according to the requirements of the test mission. After inputting the waveform, confirm the sampling frequency and sample length.
[0024] In the implementation process of this application, the input target gust waveform is not directly used as the control quantity of the gust generator, but rather as the target basis for subsequent waveform decomposition and control parameter solving. The input target gust waveform is decomposed using Fourier decomposition and other methods to decompose the target waveform into trigonometric function components with different waveform characteristics, and the frequency, amplitude, and phase of the corresponding trigonometric function components are obtained. The purpose of this step is to clarify the target disturbance characteristics corresponding to the gust reproduction task, providing an input basis for subsequently converting the target waveform into an executable control signal for the gust generator.
[0025] Step 104: Based on the standard trigonometric function waveform-actuation parameter group mapping relationship, match the actuation parameter group corresponding to each decomposed wave.
[0026] Step 104 specifically includes: Based on the established standard trigonometric function waveform-actuation parameter set mapping relationship, the multiple trigonometric function waveforms obtained by decomposing the target waveform are matched with multiple actuation parameter sets of the gust generator, so that each decomposed waveform corresponds to a set of gust generator actuation parameter sets, as shown in the following expression: .
[0027] in, Representing the The maximum swing angle of the blades of the gust generator for decomposing waves. Representing the The operating frequency of the gust generator for decomposing waves. Representing the The initial phase of operation of the gust generator for the decomposed wave. This represents the inverse mapping of the control parameter group mapping relationship.
[0028] Step 105: Based on the actuation timing and actuation parameter set corresponding to each decomposed wave, determine the actuation signal of each decomposed wave as the decomposed actuation signal. Decompose the actuation signal The expression is as follows: .
[0029] Step 106: Superimpose all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves to obtain the total actuation signal. The main actuation signal is used to control the gust generator to reproduce the target gust waveform. The expression is as follows: .
[0030] Step 106 specifically includes: Based on the actuation timing corresponding to different decomposed waves, all decomposed actuation signals are superimposed to obtain an initial total actuation signal. This initial total actuation signal is then smoothed to obtain a smoothed total actuation signal. A feasibility assessment of the smoothed total actuation signal is performed based on the mechanical limitations of the gust generator, yielding a first assessment result: if the first assessment result is negative, the process returns to the step "smoothing the initial total actuation signal to obtain a smoothed total actuation signal"; if the first assessment result is positive, the smoothed total actuation signal is determined as the undetermined total actuation signal. A second assessment result is obtained by determining whether the similarity between the undetermined total actuation signal and the initial total actuation signal is greater than a set similarity value: if the second assessment result is negative, the target gust waveform is determined to be mechanically limited by the gust generator; if the second assessment result is positive, the undetermined total actuation signal is determined as the total actuation signal, and the total actuation signal is used to control the gust generator to reproduce the target gust waveform.
[0031] The specific method for determining the feasibility of smoothing the overall actuation signal based on the mechanical limitations of the gust generator is as follows: The maximum speed and acceleration of the control signal are screened based on the mechanical actuation capability of the gust generator. If the maximum speed and acceleration values of the smoothed overall actuation signal are within the mechanical actuation capability limits of the gust generator, then the smoothed overall actuation signal is deemed feasible; otherwise, it is deemed infeasible, and smoothing processing continues. The initial overall actuation signal is adjusted using smoothing methods such as binning smoothing, ultimately maintaining a similarity of over 95% between the pending overall actuation signal and the initial overall actuation signal, thereby improving the accuracy of reproducing the target gust waveform.
[0032] The final overall actuation signal is input into the gust generator control system, driving the gust generator to actuate according to the calculation results, thereby forming an approximate reproduction result of the target gust waveform in the flow field of the test section, such as... Figure 4 As shown, since the final total actuation signal is obtained by superimposing the basic actuation signals corresponding to multiple decomposed waves according to their time sequence, the gust generator can construct and output control signals for complex target gust waveforms based on the experimental results of the preceding standard waveform. In the implementation process of this application, when the target gust waveform is relatively complex, the approximation degree of the final output flow field of the gust generator to the target gust waveform can be improved by increasing the number of decomposed waves, adjusting the decomposition accuracy, or optimizing the actuation signal superposition method, thereby realizing the reproduction of non-standard, non-periodic, and complex target gust waveforms.
[0033] In another exemplary embodiment of this application, a system for reproducing a target waveform for a gust generator is provided, specifically including: The mapping relationship construction module is used to construct the standard trigonometric function waveform-actuation parameter group mapping relationship; The target waveform acquisition module is used to acquire the target gust waveform; The target waveform decomposition module is used to decompose the target gust waveform to obtain multiple decomposed waves; the decomposed waves are trigonometric function waveforms; different trigonometric function waveforms have different waveform characteristics; the waveform characteristics include frequency, amplitude and phase; The decomposed wave and actuation parameter matching module is used to match the actuation parameter set corresponding to each decomposed wave based on the standard trigonometric function waveform-aperture parameter set mapping relationship; The decomposed actuation signal determination module is used to determine the actuation signal of each decomposed wave as the decomposed actuation signal based on the actuation timing and actuation parameter group corresponding to each decomposed wave. The total actuation signal determination and waveform reproduction module is used to superimpose and calculate all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves to obtain the total actuation signal; the total actuation signal is used to control the gust generator to reproduce the target gust waveform.
[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0035] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for reproducing the target waveform of a gust generator, characterized in that, include: A standard trigonometric function waveform-aperture parameter set mapping relationship is constructed; the actuation parameter set includes the actuation frequency, blade swing angle and phase parameters of the gust generator. Obtain the target gust waveform; The target gust waveform is decomposed to obtain multiple decomposed waves; the decomposed waves are trigonometric function waveforms; different trigonometric function waveforms have different waveform characteristics; the waveform characteristics include frequency, amplitude and phase; Based on the standard trigonometric function waveform-actuation parameter group mapping relationship, match the actuation parameter group corresponding to each decomposed wave; Based on the actuation timing and actuation parameter group corresponding to each decomposed wave, the actuation signal of each decomposed wave is determined as the decomposed actuation signal; The total actuation signal is obtained by superimposing all the decomposed actuation signals according to the actuation timing corresponding to different decomposed waves; the total actuation signal is used to control the gust generator to reproduce the target gust waveform.
2. The method for reproducing the target waveform for a gust generator according to claim 1, characterized in that, The decomposition process employs the Fourier decomposition method.
3. The method for reproducing the target waveform for a gust generator according to claim 1, characterized in that, The total actuation signal is obtained by superimposing all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves, specifically including: The initial total actuation signal is obtained by superimposing all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves. The initial total actuation signal is smoothed and its feasibility is determined to obtain the undetermined total actuation signal. Calculate the similarity between the undetermined total actuation signal and the initial total actuation signal; Based on the similarity and the similarity set value, the total actuation signal is determined.
4. The method for reproducing the target waveform for a gust generator according to claim 3, characterized in that, The initial total actuation signal is smoothed and its feasibility is assessed to obtain the undetermined total actuation signal, specifically including: The initial total actuation signal is smoothed to obtain a smoothed total actuation signal; Based on the mechanical limitations of the gust generator, a feasibility assessment of the smoothing total actuation signal was conducted, and the first assessment result was obtained. If the first judgment result is negative, then return to the step "smooth the initial total actuation signal to obtain a smoothed total actuation signal"; If the first judgment result is yes, then the smooth total actuation signal is determined as the undetermined total actuation signal.
5. The method for reproducing the target waveform for a gust generator according to claim 3, characterized in that, Based on the similarity and the similarity set value, the total actuation signal is determined, specifically including: Determine whether the similarity is greater than the set similarity value to obtain a second determination result; If the second judgment result is negative, it is determined that the target gust waveform is mechanically limited by the gust generator; If the second judgment result is yes, then the undetermined total actuation signal is determined to be the total actuation signal.
6. The method for reproducing the target waveform for a gust generator according to claim 5, characterized in that, After determining that the pending total actuation signal is the total actuation signal, the method further includes: The target gust waveform is reproduced by controlling the gust generator using the overall actuation signal.
7. A system for reproducing the target waveform of a gust generator, characterized in that, The system employs the method for reproducing the target waveform for a gust generator as described in any one of claims 1-6, and the system comprises: The mapping relationship construction module is used to construct the standard trigonometric function waveform-actuation parameter group mapping relationship; The target waveform acquisition module is used to acquire the target gust waveform; The target waveform decomposition module is used to decompose the target gust waveform to obtain multiple decomposed waves; the decomposed waves are trigonometric function waveforms; different trigonometric function waveforms have different waveform characteristics; the waveform characteristics include frequency, amplitude and phase; The decomposed wave and actuation parameter matching module is used to match the actuation parameter group corresponding to each decomposed wave based on the standard trigonometric function waveform-aperture parameter group mapping relationship; The decomposed actuation signal determination module is used to determine the actuation signal of each decomposed wave as the decomposed actuation signal based on the actuation timing and actuation parameter group corresponding to each decomposed wave. The total actuation signal determination and waveform reproduction module is used to superimpose and calculate all decomposed actuation signals according to the actuation timing corresponding to different decomposed waves to obtain the total actuation signal; the total actuation signal is used to control the gust generator to reproduce the target gust waveform.