A helicopter rotor vibration adjustment system

Abstract

This invention relates to the field of helicopter rotor vibration adjustment, and discloses a helicopter rotor vibration adjustment system, comprising: a vibration monitoring and acquisition module for arranging sensors at key locations on the helicopter rotor and fuselage; a data preprocessing module for preprocessing the acquired raw vibration data; a model analysis and construction module for using the preprocessed data; a control strategy formulation module for using the model analysis results; an effect evaluation and feedback module for continuously monitoring the adjusted vibration; and a system optimization and update module for using the effect evaluation and feedback information. Based on the preprocessed data, the model analysis and construction module establishes, fits, and verifies a vibration mathematical model, deeply analyzes the vibration generation and propagation mechanism, and formulates targeted control strategies for adjusting rotor blade angle and rotational speed parameters, enabling the scientific and effective formulation of strategies conducive to adjusting rotor vibration.

Description

Technical Field

[0001] This invention relates to the field of helicopter rotor vibration adjustment, specifically a helicopter rotor vibration adjustment system. Background Technology

[0002] The helicopter rotor is a crucial component in helicopter flight, generating lift that enables the helicopter to hover, ascend, land, and move in the air. The helicopter rotor system consists of rotor blades, the main rotor shaft, and the pitch control mechanism, among other parts. The design and operation of the rotor are central to helicopter flight control.

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

[0004] Existing technologies for addressing helicopter rotor vibration often involve optimizing structural design and adjusting rotor parameters. However, this approach typically relies on the experience of technicians and lacks scientific basis, resulting in deficiencies from the data acquisition stage. Consequently, control strategies lack scientific rigor and specificity, ultimately failing to effectively resolve a series of problems caused by rotor vibration, such as component wear, which severely limits the full utilization of helicopter performance and its safe and stable operation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a helicopter rotor vibration adjustment system. This system solves the problem that rotor vibration adjustment relies on the experience of technicians, which cannot provide strong support for the formulation of control strategies, resulting in a lack of scientific rigor and the inability to formulate practical and effective control strategies to adjust rotor vibration.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A helicopter rotor vibration control system, comprising:

[0008] Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, operation execution module, effect evaluation and feedback module, and system optimization and update module;

[0009] The vibration monitoring and acquisition module is used to acquire vibration amplitude, frequency and phase data in real time by placing sensors at key locations on the helicopter rotor and fuselage.

[0010] The data preprocessing module is used to preprocess the collected raw vibration data;

[0011] 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 vibration generation and propagation mechanism.

[0012] The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results;

[0013] The execution module is used to translate the control strategy into actual mechanical or electronic actions, which are used to adjust the rotor.

[0014] The effect evaluation and feedback module is used to continuously monitor the vibration after adjustment, evaluate the control effect, and feed the results back to other modules.

[0015] The system optimization and update module is used to optimize and update the system's parameters, models, and strategies based on the information from effect evaluation and feedback.

[0016] 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 acquired data.

[0017] Preferably, the data preprocessing module includes a filtering and noise reduction unit, a data amplification unit, and a feature extraction unit. The filtering and noise reduction 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, noise reduction, amplification, and feature extraction processing.

[0018] 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 the model parameters according to actual data. The model verification unit is used to verify the accuracy and reliability of the model.

[0019] 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. 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 rotational speed parameters.

[0020] Preferably, the execution operation module includes an instruction conversion unit, an execution mechanism driving unit, and a real-time monitoring unit. The instruction conversion unit is used to convert the control strategy into specific execution instructions. The execution mechanism driving unit is used to drive the corresponding execution mechanism to execute the instructions. The real-time monitoring unit is used to monitor the execution status in real time during the execution process.

[0021] 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. The feedback generation unit is used to generate feedback information based on the evaluation results.

[0022] 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 based on new data and feedback, and the strategy improvement unit is used to improve and refine the control strategy.

[0023] This invention provides a helicopter rotor vibration adjustment system. It has the following beneficial effects:

[0024] 1. This invention uses a model analysis and construction module to establish, fit, and verify a vibration mathematical model based on preprocessed data, thereby deeply analyzing the vibration generation and propagation mechanism. The control strategy formulation module, based on the model analysis results, formulates targeted control strategies for adjusting rotor blade angle and rotation speed parameters through steps such as generation, optimization, and simulation verification. This enables the scientific and effective formulation of strategies that help regulate rotor vibration.

[0025] 2. The vibration monitoring and acquisition module of this invention uses sensors and precisely sets acquisition parameters to acquire vibration data of the helicopter rotor and fuselage in real time, providing raw materials for subsequent work. The data preprocessing module performs filtering, noise reduction, amplification and feature extraction on the acquired raw vibration data to remove noise interference, enhance useful signals and extract key features. In use, this makes the data used in subsequent analysis and other processes more accurate and usable.

[0026] 3. The execution module of this invention transforms the control strategy into actual mechanical or electronic actions, drives the actuator to accurately execute the instructions, and monitors the execution status in real time to ensure that the adjustment action is effectively applied to the rotor. The effect evaluation and feedback module continuously monitors the vibration after adjustment, compares data, evaluates the effect and generates feedback information. The two work together to ensure that the adjustment action is effectively implemented and to accurately know the actual effect achieved by the adjustment. Attached Figure Description

[0027] Figure 1 This is a system architecture diagram of a helicopter rotor vibration adjustment system according to the present invention;

[0028] Figure 2 This is a diagram illustrating the architecture of a vibration monitoring and acquisition module for a helicopter rotor vibration regulation system according to the present invention.

[0029] Figure 3 This is a data preprocessing module architecture diagram of a helicopter rotor vibration adjustment system according to the present invention;

[0030] Figure 4 This is a model analysis and construction module architecture diagram of a helicopter rotor vibration adjustment system according to the present invention;

[0031] Figure 5 A module architecture diagram is provided for the control strategy of a helicopter rotor vibration adjustment system according to the present invention.

[0032] Figure 6 This is a diagram illustrating the architecture of the execution operation module of a helicopter rotor vibration adjustment system according to the present invention.

[0033] Figure 7 This is a diagram illustrating the architecture of an effect evaluation and feedback module for a helicopter rotor vibration adjustment system according to the present invention.

[0034] Figure 8 This is a system optimization and update module architecture diagram of a helicopter rotor vibration adjustment system according to the present invention;

[0035] Figure 9 This is a modular architecture diagram of a helicopter rotor vibration adjustment system according to the present invention. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example:

[0038] Please see the appendix Figure 1 - Appendix Figure 9 This invention provides a helicopter rotor vibration adjustment system, comprising:

[0039] Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, operation execution module, effect evaluation and feedback module, and system optimization and update module;

[0040] The vibration monitoring and acquisition module is used to acquire vibration amplitude, frequency and phase data in real time by placing sensors at key locations on the helicopter rotor and fuselage.

[0041] The data preprocessing module is used to preprocess the acquired raw vibration data;

[0042] 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 vibration generation and propagation mechanism.

[0043] The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results.

[0044] The execution module is used to translate the control strategy into actual mechanical or electronic actions, which are used to adjust the rotor.

[0045] The effect evaluation and feedback module is used to continuously monitor the vibration after adjustment, evaluate the control effect, and feed the results back to other modules.

[0046] The system optimization and update module is used to optimize and update the system's parameters, models, and strategies based on the information from effect evaluation and feedback.

[0047] 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 acquired data.

[0048] Specifically, the sensor layout unit scientifically and rationally plans the installation positions of sensors on the helicopter rotor and fuselage to ensure comprehensive coverage of key monitoring areas, capture vibration information from different parts to the greatest extent, avoid monitoring blind spots, and provide comprehensive and accurate raw data for subsequent data analysis.

[0049] The data acquisition unit acquires vibration data detected by the sensors in real time and efficiently, ensuring the timeliness and completeness of the data. It can reflect the changes in vibration status during helicopter operation in a timely manner, providing the latest data support for rapid analysis and processing, and helping to identify potential problems in a timely manner.

[0050] The parameter setting unit precisely sets parameters such as the accuracy and frequency of the collected data to meet the monitoring needs under different working conditions. It can ensure that high-resolution vibration data is obtained at critical moments, while reasonably controlling the amount of data during normal operation, reducing storage and processing pressure, and improving the effectiveness and availability of the data.

[0051] The data preprocessing module includes a filtering and noise reduction unit, a data amplification unit, and a feature extraction unit. The filtering and noise reduction 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 raw data. The preprocessing includes filtering, noise reduction, amplification, and feature extraction.

[0052] Specifically, the filtering and noise reduction unit filters the collected data, effectively reducing noise interference and significantly improving the signal-to-noise ratio of the data, making subsequent analysis more accurate and reliable, and preventing noise from masking key vibration information.

[0053] The data amplification unit enhances the originally weak but significant data signals, making them easier to detect and analyze. This helps to discover potential minute vibration changes, improves the system's sensitivity to early faults or anomalies, and prevents useful information from being missed.

[0054] The feature extraction unit accurately extracts key vibration features from a large amount of raw data. This significantly reduces the amount of data, highlights key information reflecting the essence of vibration, and provides concise and effective data input for subsequent model building and analysis, improving processing efficiency and analytical accuracy.

[0055] 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 based on actual data. The model verification unit is used to verify the accuracy and reliability of the model.

[0056] Specifically, the theoretical model building unit constructs an initial model framework that can describe the vibration characteristics of helicopter rotors based on relevant theories of mechanics and aerodynamics. This provides a basic structure for subsequent model refinement and optimization, and helps to understand the generation and propagation mechanism of vibration from a theoretical perspective.

[0057] 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 conditions, improve the model's prediction accuracy and adaptability to actual working conditions.

[0058] The model validation unit evaluates the accuracy and reliability of the model by comparing it with actual measurement data and using various validation methods. This ensures 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 caused by model errors.

[0059] The control strategy formulation module includes a strategy generation unit, a strategy optimization unit, and a simulation verification unit. The strategy generation unit generates control strategies based on model analysis results. The strategy optimization unit optimizes and improves the initially generated strategies. The simulation verification unit verifies the effectiveness of the control strategies through simulation. The control strategies include adjusting rotor blade angle and rotational speed parameters.

[0060] Specifically, based on the results of model analysis and relevant data, the strategy generation unit formulates preliminary control strategies to provide a basic plan for subsequent optimization work, ensuring that the strategies are targeted and feasible, and can perform preliminary control of vibration.

[0061] The strategy optimization unit conducts in-depth analysis and improvement of the initially generated control strategy to enhance its performance and effectiveness, making the control strategy more complete and efficient, better adaptable to complex and ever-changing helicopter operating conditions, and minimizing rotor vibration.

[0062] The simulation verification unit establishes a simulation environment to verify the effectiveness of the generated and optimized control strategy, identify potential problems and deficiencies in advance, avoid unexpected situations in actual applications, and ensure that the control strategy can achieve the expected results when implemented in practice.

[0063] The execution 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 the instructions. The real-time monitoring unit is used to monitor the execution status in real time during the execution process.

[0064] Specifically, the instruction conversion unit accurately converts the formulated control strategy into specific instructions that can be understood and executed by the execution mechanism. This ensures that the control strategy can be effectively executed at the hardware level, eliminates language and format differences between the strategy and actual operation, and achieves precise transmission of control intent.

[0065] The actuator drive unit provides the necessary power and control signals to the corresponding actuator, driving the actuator to act according to the command, ensuring that the actuator can respond to the command quickly and accurately, realize the precise adjustment of the helicopter rotor, and translate the control strategy into actual physical action;

[0066] The real-time monitoring unit continuously and in real-time monitors the working status and execution of the actuator during the execution process. It can promptly detect deviations and abnormalities in the execution process, providing a basis for timely adjustment and correction, ensuring that the execution process always meets expectations, and guaranteeing the effectiveness and safety of vibration regulation.

[0067] 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. The feedback generation unit is used to generate feedback information based on the evaluation results.

[0068] Specifically, the data comparison unit accurately compares and analyzes the adjusted vibration data with the pre-set standard data, which can clearly reveal the differences and degree of conformity between the actual vibration and the expected standard, providing an accurate data basis for subsequent evaluation.

[0069] Based on the results of data comparison, the effect evaluation unit comprehensively and thoroughly evaluates the effectiveness and performance of the control strategy in practical applications. In use, it can objectively and accurately determine whether the control strategy has achieved the expected vibration reduction target, providing key decision-making basis for system optimization and improvement.

[0070] Based on the conclusions of the effect evaluation, the feedback generation unit generates targeted and constructive feedback information. During use, it can promptly feed the evaluation results back to other relevant modules, enabling the entire system to be dynamically adjusted and optimized according to the actual effect, and continuously improving the performance and effect of vibration regulation.

[0071] 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 the relevant parameters in the system, the model update unit is used to update the vibration model based on new data and feedback, and the strategy improvement unit is used to improve and refine the control strategy.

[0072] Specifically, the parameter adjustment unit meticulously analyzes and adjusts various relevant parameters in the system to optimize performance, enabling the system to maintain good operating conditions under different operating conditions, improving the system's adaptability and stability, and ensuring efficient operation of the system.

[0073] The model update unit updates and improves the vibration model in a timely manner based on 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 predictive ability and control accuracy.

[0074] Based on actual results and new requirements, the strategy improvement unit makes in-depth improvements and refinements to the existing control strategy. In use, it can make the control strategy more targeted and effective, better cope with various complex vibration conditions, and achieve better helicopter rotor vibration regulation effect.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A helicopter rotor vibration adjustment system, characterized in that, include: Vibration monitoring and acquisition module, data preprocessing module, model analysis and construction module, control strategy formulation module, operation execution module, effect evaluation and feedback module, and system optimization and update module; The vibration monitoring and acquisition module is used to acquire vibration amplitude, frequency and phase data in real time by placing sensors at key locations on the helicopter rotor and fuselage. 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 vibration generation and propagation mechanism. The control strategy formulation module is used to formulate targeted control strategies based on the model analysis results; The execution module is used to translate the control strategy into actual mechanical or electronic actions, which are used 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 the results back to other modules. The system optimization and update module is used to optimize and update the system's parameters, models, and strategies based on the information from the effect evaluation and feedback. The vibration monitoring and acquisition module includes a sensor layout unit, a data acquisition unit, and a parameter setting unit. The sensor layout unit determines the sensor's installation position on the helicopter. The data acquisition unit acquires data detected by the sensors in real time. The parameter setting unit sets the accuracy and frequency parameters of the acquired data. 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 builds an initial vibration model based on relevant theories. The parameter fitting unit fits and calibrates the model parameters based on actual data. The model verification unit verifies the accuracy and reliability of the model. The control strategy formulation module includes a strategy generation unit, a strategy optimization unit, and a simulation verification unit. The strategy generation unit generates a control strategy based on the model analysis results. The strategy optimization unit optimizes and improves the initially generated strategy. The simulation verification unit verifies the effectiveness of the control strategy through simulation. The control strategy includes adjusting the rotor blade angle and rotational speed parameters. The effect evaluation and feedback module includes a data comparison unit, an effect evaluation unit, and a feedback generation unit. The data comparison unit compares the adjusted vibration data with a preset standard. The effect evaluation unit evaluates the actual effect of the control strategy. The feedback generation unit generates feedback information based on the evaluation results. The system optimization and update module includes a parameter adjustment unit, a model update unit, and a strategy improvement unit. The parameter adjustment unit adjusts and optimizes relevant parameters in the system. The model update unit updates the vibration model based on new data and feedback. The strategy improvement unit improves and refines the control strategy.

2. The helicopter rotor vibration adjustment system according to claim 1, characterized in that: The data preprocessing module includes a filtering and noise reduction unit, a data amplification unit, and a feature extraction unit. The filtering and noise reduction 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 raw data. The preprocessing includes filtering, noise reduction, amplification, and feature extraction.

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

Images