Helicopter rotor vibration adjusting system

Abstract

The invention relates to the field of helicopter rotor vibration adjustment, and discloses a helicopter rotor vibration adjustment system, which comprises a vibration monitoring and acquisition module, a data preprocessing module, a data processing module, a data storage module, a data processing module, a data processing module and a data processing module, and is characterized in that the vibration monitoring and acquisition module is used for arranging sensors at key positions of a helicopter rotor and a fuselage; the model analysis and construction module is used for pre-processing data, the control strategy making module is used for analyzing a result according to a model, the effect evaluation and feedback module is used for continuously monitoring the adjusted vibration condition, and the system optimization and updating module is used for evaluating and feeding back information according to the effect. The model analysis and construction module establishes, fits and verifies a vibration mathematical model based on the preprocessed data in combination with the data, deeply analyzes a vibration generation and propagation mechanism, formulates a targeted control strategy for adjusting rotor blade angles and rotating speed parameters, and can scientifically and effectively formulate an effect of a strategy helpful for adjusting rotor vibration.

Description

Technical Field

[0001] The invention relates to the field of helicopter rotor vibration adjustment, in particular to a helicopter rotor vibration adjustment system. Background Art

[0002] The helicopter rotor is a vital component in helicopter flight. It generates lift to enable the helicopter to hover, rise, land and move in the air. The helicopter rotor system consists of rotor blades, main rotor shaft, pitch change mechanism and other parts. The design and operation of the rotor is the core of helicopter flight control.

[0003] The main reason for using vibration control systems on helicopter rotors is to reduce the vibrations generated by the rotors, which can affect flight stability, pilot comfort, and the structural life of the helicopter.

[0004] The existing technology for dealing with the problem of helicopter rotor vibration often adopts the method of optimizing structural design and adjusting rotor parameters. However, this method usually relies on the experience of technicians and has no scientific basis, resulting in deficiencies in the source of data collection, which in turn leads to the lack of scientificity and specificity in the formulation of control strategies. Ultimately, it is impossible to effectively solve a series of problems caused by rotor vibration, such as component wear, which greatly limits the full performance of the helicopter and its safe and stable operation. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a helicopter rotor vibration regulation system to solve the problem that rotor vibration regulation needs to rely on the experience of technicians, cannot provide strong support for the formulation of control strategies, resulting in a lack of scientific rigor and inability to formulate effective control strategies to regulate rotor vibration.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A helicopter rotor vibration regulation system, comprising: Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, execution operation module, effect evaluation and feedback module and system optimization and update module; The vibration monitoring and acquisition module is used to arrange sensors at key positions of the helicopter rotor and fuselage, and the sensors are used to obtain the amplitude, frequency and phase data of the vibration in real time; The data preprocessing module is used to preprocess the collected original vibration data; The model analysis and construction module is used to establish a mathematical model of helicopter rotor vibration based on the preprocessed data, and the mathematical model is used to analyze the role of the mechanism of vibration generation and propagation; The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results; The execution operation module is used to convert the control strategy into actual mechanical or electronic action for adjusting the rotor; The effect evaluation and feedback module is used to continuously monitor the vibration after adjustment, evaluate the control effect, and feed back the results to other modules; The system optimization and update module is used to optimize and update the system parameters, models, and strategies based on effect evaluation and feedback information.

[0007] Preferably, the vibration monitoring and acquisition module includes a sensor layout unit, a data acquisition unit and a parameter setting unit. The sensor layout unit is used to determine the installation position of the sensor on the helicopter, the data acquisition unit is used to acquire the data detected by the sensor in real time, and the parameter setting unit is used to set the accuracy and frequency parameters of the collected data.

[0008] Preferably, the data preprocessing module includes a filtering and denoising unit, a data amplification unit and a feature extraction unit. The filtering and denoising unit is used to remove noise from the data, the data amplification unit is used to enhance weak but useful data signals, and the feature extraction unit is used to extract key vibration features from the original data. The preprocessing includes filtering, denoising, amplification and feature extraction processing.

[0009] Preferably, the model analysis and construction module includes a theoretical model building unit, a parameter fitting unit and a model verification unit. The theoretical model building unit is used to build an initial vibration model based on relevant theories, the parameter fitting unit is used to fit and calibrate model parameters according to actual data, and the model verification unit is used to verify the accuracy and reliability of the model.

[0010] Preferably, the control strategy formulation module includes a strategy generation unit, a strategy optimization unit and a simulation verification unit. The strategy generation unit is used to generate a control strategy based on the model analysis results, the strategy optimization unit is used to optimize and improve the initially generated strategy, and the simulation verification unit is used to verify the effectiveness of the control strategy through simulation. The control strategy includes adjusting the rotor blade angle and speed parameters.

[0011] Preferably, the execution operation module includes an instruction conversion unit, an actuator driving unit and a real-time monitoring unit. The instruction conversion unit is used to convert the control strategy into specific execution instructions, the actuator driving unit is used to drive the corresponding actuator to execute instructions, and the real-time monitoring unit is used to monitor the execution status in real time during the execution process.

[0012] Preferably, the effect evaluation and feedback module includes a data comparison unit, an effect evaluation unit and a feedback generation unit. The data comparison unit is used to compare the adjusted vibration data with a preset standard, the effect evaluation unit is used to evaluate the actual effect of the control strategy, and the feedback generation unit is used to generate feedback information based on the evaluation results.

[0013] Preferably, the system optimization and update module includes a parameter adjustment unit, a model update unit and a strategy improvement unit. The parameter adjustment unit is used to adjust and optimize relevant parameters in the system, the model update unit is used to update the vibration model according to new data and feedback, and the strategy improvement unit is used to improve and perfect the control strategy.

[0014] The present invention provides a helicopter rotor vibration regulation system, which has the following beneficial effects: 1. The present invention establishes, fits and verifies the vibration mathematical model based on the preprocessed data through the model analysis and construction module, and deeply analyzes the vibration generation and propagation mechanism. The control strategy formulation module formulates a targeted control strategy for adjusting the rotor blade angle and speed parameters based on the model analysis results, through the steps of generation, optimization and simulation verification, and can scientifically and effectively formulate the effect of helping to adjust the rotor vibration strategy.

[0015] 2. The vibration monitoring and acquisition module of the present invention uses sensors and accurately sets acquisition parameters to obtain vibration data of the helicopter rotor and fuselage in real time, providing raw materials for subsequent work, while the data preprocessing module filters, reduces noise, amplifies, and extracts features on the collected raw vibration data to remove noise interference, enhance useful signals, and extract key features. In use, the data used in subsequent analysis and other links is made more accurate and usable.

[0016] 3. The execution operation module of the present invention converts the control strategy into actual mechanical or electronic action, drives the actuator to accurately execute the instructions, and monitors the execution status in real time to ensure that the adjustment action actually acts on the rotor. The effect evaluation and feedback module continuously monitors the vibration condition after adjustment, compares data, evaluates the effect and generates feedback information. The joint action of the two can not only ensure that the adjustment action is effectively implemented, but also accurately know the actual effect achieved by the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A system architecture diagram of a helicopter rotor vibration regulation system according to the present invention; Figure 2 This is a vibration monitoring and acquisition module architecture diagram of a helicopter rotor vibration regulation system of the present invention; Figure 3This is a data preprocessing module architecture diagram of a helicopter rotor vibration regulation system of the present invention; Figure 4 A model analysis and construction module architecture diagram of a helicopter rotor vibration regulation system of the present invention; Figure 5 A module architecture diagram is formulated for a control strategy of a helicopter rotor vibration regulation system of the present invention; Figure 6 This is a diagram of the execution operation module architecture of a helicopter rotor vibration regulation system of the present invention; Figure 7 This is a diagram of the effect evaluation and feedback module architecture of a helicopter rotor vibration regulation system of the present invention; Figure 8 This is a system optimization and update module architecture diagram of a helicopter rotor vibration regulation system of the present invention; Fig. 9 This is a module relationship architecture diagram of a helicopter rotor vibration regulation system of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example: Please see attached Figure 1 -Attached Fig. 9 The embodiment of the present invention provides a helicopter rotor vibration regulation system, comprising: Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, execution operation module, effect evaluation and feedback module and system optimization and update module; The vibration monitoring and acquisition module is used to arrange sensors at key positions of the helicopter rotor and fuselage. The sensors are used to obtain the amplitude, frequency and phase data of vibration in real time. The data preprocessing module is used to preprocess the collected raw vibration data; The model analysis and construction module is used to establish a mathematical model of helicopter rotor vibration based on preprocessed data. The mathematical model is used to analyze the role of the mechanism of vibration generation and propagation; The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results.

[0020] The execution module is used to convert the control strategy into actual mechanical or electronic actions to adjust the rotor; The effect evaluation and feedback module is used to continuously monitor the vibration after adjustment, evaluate the control effect, and feed back the results to other modules; The system optimization and update module is used to optimize and update the system parameters, models, and strategies based on effect evaluation and feedback information.

[0021] The vibration monitoring and acquisition module includes a sensor layout unit, a data acquisition unit and a parameter setting unit. The sensor layout unit is used to determine the installation position of the sensor on the helicopter. The data acquisition unit is used to obtain the data detected by the sensor in real time. The parameter setting unit is used to set the accuracy and frequency parameters of the collected data.

[0022] Specifically, the sensor layout unit scientifically and rationally plans the installation positions of sensors on the helicopter rotor and fuselage to ensure that the key monitoring areas can be fully covered, and the vibration information from different parts can be captured to the greatest extent possible, avoiding monitoring blind spots, and providing comprehensive and accurate raw data for subsequent data analysis; The data acquisition unit acquires the vibration data detected by the sensor in real time and efficiently, ensuring the timeliness and integrity of the data. It can promptly reflect the changes in the vibration state during the operation of the helicopter, provide the latest data support for rapid analysis and processing, and help to discover potential problems in a timely manner. The parameter setting unit accurately sets parameters such as the accuracy and frequency of the collected data to meet the monitoring needs under different working conditions. It can not only ensure that high-resolution vibration data is obtained at important moments, but also reasonably control the amount of data during normal operation, reduce storage and processing pressure, and improve the validity and availability of the data.

[0023] The data preprocessing module includes a filtering and denoising unit, a data amplification unit and a feature extraction unit. The filtering and denoising unit is used to remove noise from the data, the data amplification unit is used to enhance weak but useful data signals, and the feature extraction unit is used to extract key vibration features from the original data. The preprocessing includes filtering, denoising, amplification and feature extraction processing.

[0024] Specifically, the filtering and noise reduction unit performs filtering processing on the collected data to effectively reduce the noise interference therein, which can significantly improve the signal-to-noise ratio of the data, making the subsequent analysis more accurate and reliable, and avoiding the masking of key vibration information by noise; The data amplification unit enhances the originally weak but significant data signal, making it easier to detect and analyze, helping to discover potential small vibration changes, improving the system's sensitivity to early faults or anomalies, and avoiding the omission of useful information; The feature extraction unit accurately extracts key vibration features from a large amount of raw data. It can significantly reduce the amount of data, highlight the key information that reflects the nature of vibration, provide concise and effective data input for subsequent model building and analysis, and improve processing efficiency and analysis accuracy.

[0025] The model analysis and construction module includes a theoretical model building unit, a parameter fitting unit and a model verification unit. The theoretical model building unit is used to build an initial vibration model based on relevant theories, the parameter fitting unit is used to fit and calibrate the model parameters according to actual data, and the model verification unit is used to verify the accuracy and reliability of the model.

[0026] Specifically, the theoretical model building unit constructs an initial model framework that can describe the vibration characteristics of helicopter rotors based on relevant mechanics, aerodynamics and other theories, providing a basic structure for subsequent model refinement and optimization, and helping to understand the generation and propagation mechanism of vibration from a theoretical level; The parameter fitting unit uses the actual collected data to accurately fit and calibrate the parameters in the initial model, so that the model can better fit the actual vibration situation, improve the model's prediction accuracy and adaptability to actual working conditions; The model verification unit evaluates the accuracy and reliability of the model by comparing it with actual measurement data and various verification methods, ensuring that the model can accurately reflect the vibration characteristics of the helicopter rotor, providing a reliable basis for formulating effective control strategies, and reducing the risk of decision-making errors due to model errors.

[0027] The control strategy formulation module includes a strategy generation unit, a strategy optimization unit and a simulation verification unit. The strategy generation unit is used to generate a control strategy based on the model analysis results. The strategy optimization unit is used to optimize and improve the initially generated strategy. The simulation verification unit is used to verify the effectiveness of the control strategy through simulation. The control strategy includes adjusting the rotor blade angle and speed parameters.

[0028] Specifically, the strategy generation unit formulates a preliminary control strategy based on the results and relevant data obtained from the model analysis to provide a basic solution for subsequent optimization work, ensuring that the strategy is targeted and feasible and can perform preliminary control on vibration; The strategy optimization unit conducts in-depth analysis and improvement on the initially generated control strategy to improve its performance and effect, making the control strategy more complete and efficient, better adapting to the complex and changeable helicopter operating conditions, and minimizing rotor vibration; The simulation verification unit verifies the effectiveness of the generated and optimized control strategy by establishing a simulation environment, discovers possible problems and deficiencies in the strategy in advance, avoids unexpected situations in actual applications, and ensures that the control strategy can achieve the expected results when it is actually implemented.

[0029] The execution operation module includes an instruction conversion unit, an actuator driving unit and a real-time monitoring unit. The instruction conversion unit is used to convert the control strategy into specific execution instructions, the actuator driving unit is used to drive the corresponding actuator to execute instructions, and the real-time monitoring unit is used to monitor the execution status in real time during the execution process.

[0030] Specifically, the instruction conversion unit accurately converts the formulated control strategy into specific instructions that can be understood and executed by the actuator, which is used to ensure that the control strategy can be effectively executed at the hardware level, eliminate the language and format differences between the strategy and the actual operation, and realize accurate control intention transmission; The actuator drive unit provides the required power and control signals to the corresponding actuator, drives the actuator to act according to the command, ensures that the actuator can respond to the command quickly and accurately, realizes the precise adjustment of the helicopter rotor, and converts the control strategy into actual physical action; The real-time monitoring unit continuously and in real time monitors the working status and execution status of the actuator during the execution process. It can promptly discover deviations and abnormalities in the execution process, provide a basis for timely adjustment and correction, ensure that the execution process always meets expectations, and ensure the effectiveness and safety of vibration regulation.

[0031] The effect evaluation and feedback module includes a data comparison unit, an effect evaluation unit and a feedback generation unit. The data comparison unit is used to compare the adjusted vibration data with the preset standard, the effect evaluation unit is used to evaluate the actual effect of the control strategy, and the feedback generation unit is used to generate feedback information according to the evaluation results.

[0032] Specifically, the data comparison unit accurately compares and analyzes the adjusted vibration data with the pre-set standard data in detail, which can clearly reveal the difference and degree of consistency between the actual vibration situation and the expected standard, providing an accurate data basis for subsequent evaluation; Based on the results of data comparison, the effect evaluation unit conducts a comprehensive and in-depth evaluation of the effectiveness and performance of the control strategy in actual application. During use, it can objectively and accurately determine whether the control strategy has achieved the expected vibration reduction target, providing a key decision-making basis for system optimization and improvement; The feedback generation unit generates targeted and constructive feedback information based on the conclusions of the effect evaluation. During use, it can promptly feed back the evaluation results to other related modules, enabling the entire system to dynamically adjust and optimize according to the actual effects, and continuously improve the performance and effect of vibration regulation.

[0033] The system optimization and update module includes a parameter adjustment unit, a model update unit and a strategy improvement unit. The parameter adjustment unit is used to adjust and optimize relevant parameters in the system, the model update unit is used to update the vibration model according to new data and feedback, and the strategy improvement unit is used to improve and perfect the control strategy.

[0034] Specifically, the parameter adjustment unit carefully analyzes and adjusts various related parameters in the system to achieve performance optimization, which can keep the system in good operating state under different working conditions, improve the adaptability and stability of the system, and ensure the efficient operation of the system; The model updating unit updates and improves the vibration model in a timely manner based on the newly collected data and feedback information. The improved feedback information enables the model to more accurately reflect the actual vibration characteristics of the helicopter rotor during use, providing a more reliable theoretical basis for the formulation of control strategies and improving the system's prediction capability and control accuracy. Based on actual results and new requirements, the strategy improvement unit conducts in-depth improvements and perfections on the existing control strategies, which can make the control strategies more targeted and effective during use, better cope with various complex vibration situations, and achieve better helicopter rotor vibration regulation effects.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A helicopter rotor vibration control system, characterized in that: include: Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, execution operation module, effect evaluation and feedback module and system optimization and update module; The vibration monitoring and acquisition module is used to arrange sensors at key positions of the helicopter rotor and fuselage, and the sensors are used to obtain the amplitude, frequency and phase data of the vibration in real time; The data preprocessing module is used to preprocess the collected original vibration data; The model analysis and construction module is used to establish a mathematical model of helicopter rotor vibration based on the preprocessed data, and the mathematical model is used to analyze the role of the mechanism of vibration generation and propagation; The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results; The execution operation module is used to convert the control strategy into actual mechanical or electronic action for adjusting the rotor; The effect evaluation and feedback module is used to continuously monitor the vibration after adjustment, evaluate the control effect, and feed back the results to other modules; The system optimization and update module is used to optimize and update the system parameters, models, and strategies based on effect evaluation and feedback information.

2. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The vibration monitoring and acquisition module includes a sensor layout unit, a data acquisition unit and a parameter setting unit. The sensor layout unit is used to determine the installation position of the sensor on the helicopter, the data acquisition unit is used to obtain the data detected by the sensor in real time, and the parameter setting unit is used to set the accuracy and frequency parameters of the collected data.

3. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The data preprocessing module includes a filtering and denoising unit, a data amplifying unit and a feature extraction unit. The filtering and denoising unit is used to remove noise from the data, the data amplifying unit is used to enhance weak but useful data signals, and the feature extraction unit is used to extract key vibration features from the original data. The preprocessing includes filtering, denoising, amplifying and feature extraction processing.

4. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The model analysis and construction module includes a theoretical model building unit, a parameter fitting unit and a model verification unit. The theoretical model building unit is used to build an initial vibration model based on relevant theories, the parameter fitting unit is used to fit and calibrate model parameters according to actual data, and the model verification unit is used to verify the accuracy and reliability of the model.

5. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The control strategy formulation module includes a strategy generation unit, a strategy optimization unit and a simulation verification unit. The strategy generation unit is used to generate a control strategy according to the model analysis results, the strategy optimization unit is used to optimize and improve the initially generated strategy, and the simulation verification unit is used to verify the effectiveness of the control strategy through simulation. The control strategy includes adjusting the rotor blade angle and speed parameters.

6. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The execution operation module includes an instruction conversion unit, an actuator driving unit and a real-time monitoring unit. The instruction conversion unit is used to convert the control strategy into specific execution instructions, the actuator driving unit is used to drive the corresponding actuator to execute instructions, and the real-time monitoring unit is used to monitor the execution status in real time during the execution process.

7. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The effect evaluation and feedback module includes a data comparison unit, an effect evaluation unit and a feedback generation unit. The data comparison unit is used to compare the adjusted vibration data with the preset standard, the effect evaluation unit is used to evaluate the actual effect of the control strategy, and the feedback generation unit is used to generate feedback information according to the evaluation result.

8. A helicopter rotor vibration regulation system according to claim 1, characterized in that: The system optimization and update module includes a parameter adjustment unit, a model update unit and a strategy improvement unit. The parameter adjustment unit is used to adjust and optimize relevant parameters in the system, the model update unit is used to update the vibration model according to new data and feedback, and the strategy improvement unit is used to improve and perfect the control strategy.

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