Testing equipment for fuel injection system of liquid rocket engine

Abstract

The utility model discloses a liquid rocket engine fuel injection system test device comprising a timing module used for providing a time synchronization signal; the pressure acquisition module is connected with a plurality of pressure sensors and is used for acquiring pressure data in a propellant A pipeline and a propellant B pipeline; the valve control module is used for controlling a control valve in the pipeline; the valve current acquisition module acquires valve current data through a current sensor; and the data acquisition and processing module is connected with the timing module, the pressure acquisition module, the valve control module and the valve current acquisition module, and is used for acquiring and processing data transmitted by each module. A triple-redundancy pressure sensor array is adopted, the frequency response is larger than or equal to 100 kHz, pressure transient fluctuation can be rapidly and accurately captured, data consistency is verified through a linear relation, fault diagnosis is achieved, the dynamic pressure measurement error is reduced to 0.5% FS, and the measurement precision and reliability are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test technical field, concretely relates to a liquid rocket engine fuel injection system test equipment. BACKGROUND

[0002] In the field of liquid rocket engine fuel injection system testing, the traditional test equipment has many shortcomings. In terms of pressure measurement, single-point sensors are used, which have low reliability and large measurement errors. The dynamic pressure measurement error is usually 2% FS, making it difficult to accurately capture the transient fluctuations of the fuel pipeline pressure. The timing system has poor accuracy and large synchronization errors, which cannot meet the precise synchronization requirements of each module. The drive circuit test bandwidth of the electromagnetic valve control is limited, with slow response speed and susceptibility to common-mode interference, resulting in low control valve control accuracy. In addition, the sensors have temperature drift problems in different temperature environments, affecting the accuracy of pressure and current measurement. The existing calibration method cannot effectively compensate, resulting in poor test data reliability and inability to meet the high-precision testing requirements of modern liquid rocket engine fuel injection systems. SUMMARY

[0003] The purpose of the utility model is to solve the above problems and provide a liquid rocket engine fuel injection system test equipment to overcome the defects of the prior art, as described below.

[0004] To achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a liquid rocket engine fuel injection system test equipment, which comprises:

[0006] A timing module is used to provide a time synchronization signal.

[0007] A pressure acquisition module is connected to multiple pressure sensors and is used to acquire pressure data in the propellant A and propellant B pipelines.

[0008] A valve control module is used to control the control valve in the pipeline.

[0009] A valve current acquisition module acquires valve current data through a current sensor.

[0010] A data acquisition and processing module is connected to the timing module, pressure acquisition module, valve control module, and valve current acquisition module, and is used to acquire and process data transmitted by each module.

[0011] Preferably, the pressure acquisition module includes a three-redundancy pressure sensor array arranged in the propellant A and propellant B pipelines for high-precision measurement of pipeline pressure, with a frequency response of ≥100 kHz.

[0012] As preferred, the pressure sensors in the three-redundant pressure sensor array verify data consistency through a linear relationship formula, realize fault diagnosis function, and reduce dynamic pressure measurement error to 0.5% FS.

[0013] As preferred, the valve control module adopts a Si C MOSFET drive circuit with a test bandwidth ≥200kHz.

[0014] As preferred, the Si C MOSFET drive circuit of the valve control module is provided with a closed-loop Hall sensor and cooperates with a second-order Butterworth filter with a cutoff frequency of 300kHz for suppressing common-mode interference.

[0015] As preferred, the timing module adopts I RIG-B code synchronization with a timing synchronization error ≤50ns and a IEEE1588 protocol network time server to realize synchronization with electromagnetic valve control and pressure acquisition.

[0016] As preferred, the data acquisition and processing module is equipped with a 16-bit ADC with a sampling rate of 2MSPS.

[0017] As preferred, it further comprises a pressure / current calibration module for compensating temperature drift through a polynomial model in a -40℃ to +150℃ temperature chamber, with a temperature drift coefficient α ≤50ppm / ℃, and calibrating the closed-loop Hall current sensor using a standard table.

[0018] The beneficial effects are:

[0019] 1. The three-redundant pressure sensor array is adopted with a frequency response ≥100kHz, which can quickly and accurately capture pressure transient fluctuations, realize fault diagnosis through linear relationship verification of data consistency, reduce dynamic pressure measurement error to 0.5% FS, and greatly improve measurement accuracy and reliability.

[0020] 2. The timing module adopts I RIG-B code synchronization combined with a IEEE1588 protocol network time server with a timing synchronization error ≤50ns to realize precise synchronization with electromagnetic valve control and pressure acquisition and ensure the accuracy of collaborative work of each module.

[0021] 3. The valve control module adopts a Si C MOSFET drive circuit with a test bandwidth ≥200kHz, which responds quickly and cooperates with a closed-loop Hall sensor and a second-order Butterworth filter (cutoff frequency 300kHz) to suppress common-mode interference and ensure accurate action of the control valve.

[0022] 4. The pressure / current calibration module compensates temperature drift (temperature drift coefficient a≤50ppm / ℃) by a polynomial model and calibrates the closed-loop Hall current sensor in a temperature chamber of -40℃ to +150℃, effectively reduces the influence of temperature on measurement, and ensures measurement accuracy under different temperature environments;

[0023] 5. The data acquisition and processing module is equipped with a 16-bit ADC, a sampling rate of 2MSPS, can quickly and accurately acquire and process data, and provides reliable data support for system performance evaluation. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 is a system structure diagram of the present application;

[0026] Figure 2 is a pressure sensor wiring schematic diagram of the present application;

[0027] Figure 3 is an electromagnetic valve current detection wiring schematic diagram of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0029] Referring to Figures 1-3 The present application provides a liquid rocket engine fuel injection system test equipment, mainly composed of a system module, a pressure acquisition module, a valve control module, a valve current acquisition module, a data acquisition and processing module, and a pressure / current calibration module. Each module works cooperatively through a specific connection relationship to realize the test function of the liquid rocket engine fuel injection system. Its architecture is shown in the accompanying drawings. Figure 1 As shown in the accompanying drawings, the system module, the pressure acquisition module, the valve control module, and the valve current acquisition module are connected with the data acquisition and processing module, and the data acquisition and processing module is responsible for overall collection and processing of data transmitted by each module.

[0030] The timing module adopts IRIG-B code synchronization technology, which can ensure that the timing synchronization error is controlled within a high-precision range of ≤50 ns. Through this high-precision synchronization method, a precise time reference is provided for the entire test equipment. At the same time, the module is connected to the IEEE1588 protocol network time server, realizing precise synchronization with the electromagnetic valve control (i.e., the valve control module) and the pressure acquisition module. This design enables the modules to work in coordination in the time dimension, avoiding problems such as test data deviation caused by different time synchronization, and greatly improving the accuracy and reliability of the test.

[0031] The pressure acquisition module is connected to multiple pressure sensors, each of which is arranged in the pipeline of propellant A and propellant B for real-time acquisition of pressure data in the pipeline. In particular, the pressure acquisition module contains a three-redundant pressure sensor array. In actual application, the three pressure sensors are arranged and combined according to specific rules to synchronously measure the pressure in the fuel pipeline. Due to its frequency response ≥100 kHz, it can quickly and accurately capture the transient fluctuation of the pressure in the fuel pipeline.

[0032] The pressure sensors in the three-redundant pressure sensor array verify data consistency through a linear relationship formula. For example, assuming that the measurement values of the three sensors are P1, P2, and P3, there may be a linear relationship P1 = a × P2 + b × P3 + c (a, b, and c are coefficients determined through calibration, etc.). When one of the sensors fails or measures abnormally, the other two normally working sensors can still provide reliable pressure data, and the faulty sensor can be judged through the linear relationship formula to realize fault diagnosis function, effectively reducing the dynamic pressure measurement error from the traditional 2% FS to 0.5% FS, significantly improving the accuracy and reliability of pressure measurement.

[0033] The valve control module adopts a Si C MOSFET drive circuit, which has a test bandwidth ≥200 kHz and can quickly respond to control signals to achieve precise control of the control valve in the pipeline. To suppress common-mode interference, the Si C MOSFET drive circuit of the valve control module is provided with a closed-loop Hall sensor and a second-order Butterworth filter. The cutoff frequency of the second-order Butterworth filter is set to 300 kHz. By processing the signal through this filter, interference signals are effectively filtered out, ensuring the accuracy and stability of the valve control signal, and thus ensuring that the control valve can act as expected.

[0034] The valve current acquisition module acquires valve current data through a current sensor. The current sensor monitors the current flowing through the control valve in real time and transmits the acquired current data to the data acquisition and processing module for comprehensive monitoring and analysis of the working state of the valve.

[0035] The data acquisition and processing module is equipped with a 16-bit ADC (analog-to-digital converter) with a sampling rate of 2 MSPS (2 million samples per second). This enables the module to quickly and accurately convert analog signals to digital signals and collect and process various types of data from the timing module, pressure acquisition module, valve control module, and valve current acquisition module.

[0036] During data processing, advanced algorithms and processing logic are used to analyze, store, and output large amounts of collected data in real time, providing accurate data support for subsequent performance evaluation of the liquid rocket engine fuel injection system.

[0037] The pressure / current calibration module is mainly used to calibrate pressure sensors and closed-loop Hall current sensors in a temperature chamber environment from -40℃ to +150℃.

[0038] For pressure sensors, temperature drift is compensated through a polynomial model. At different temperature points, the measured data of the pressure sensor is corrected in real time according to the temperature drift coefficient α≤50ppm / ℃ to eliminate the influence of temperature changes on the measurement results and ensure the accuracy of pressure measurement.

[0039] For closed-loop Hall current sensors, a standard table is used for calibration. By comparing and adjusting the measured data with the standard table, the accuracy and reliability of the current sensor measurement data are ensured.

[0040] Through the specific implementation of the above modules, the liquid rocket engine fuel injection system test equipment can achieve high-precision and high-reliability testing of the liquid rocket engine fuel injection system, meeting the testing needs of related fields.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A test device for a liquid rocket engine fuel injection system, characterized in that: The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system.

2. The liquid rocket engine fueling system test apparatus of claim 1, wherein: The application relates to a pressure and current calibration module for a valve control system.

3. The liquid rocket engine fueling system test apparatus of claim 2, wherein: The application relates to a pressure and current calibration module for a valve control system.

4. The liquid rocket engine fueling system test apparatus of claim 1, wherein: The application relates to a pressure and current calibration module for a valve control system.

5. The liquid rocket engine fueling system test apparatus of claim 4, wherein: The application relates to a pressure and current calibration module for a valve control system.

6. The liquid rocket engine fueling system test apparatus of claim 1, wherein: The application relates to a pressure and current calibration module for a valve control system.

7. The liquid rocket engine fueling system test apparatus of claim 1, wherein: The application relates to a pressure and current calibration module for a valve control system.

8. The liquid rocket engine fueling system test apparatus of claim 1, wherein: The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a valve control system. The application relates to a pressure and current calibration module for a

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