Liquid rocket system polarity test equipment and test method

Abstract

The invention discloses liquid rocket system polarity test equipment and a test method, and the method comprises the steps: carrying out the analysis of the working principles of a rocket system polarity test servo system, a final correction attitude control correction system and an engine power system, selecting a corresponding data collection device, and installing the data collection device at a to-be-detected position. During testing, a corresponding data acquisition device is used for carrying out data acquisition on parts with relative position changes or electromagnetic valve actions in the servo system, the final correction attitude control correction system and the engine power system. The data transmission system transmits the collected test data to the control and data processing system. And the control and data processing system compares the received test data with the instruction data to realize automatic interpretation of the system polarity test. The liquid rocket polarity test data and the system data are effectively and deeply fused, the accurate closed loop of the data is realized, the requirements of systematization and automation of carrier rocket test are met, the product reliability is improved, and the production efficiency is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket testing, and particularly to a polarity testing device and method for a liquid rocket system. Background Art

[0002] System polarity testing is an important index assessment item in the testing stage after the rocket is fully assembled. Its main purpose is to assess whether the servo control system, terminal attitude control system, pressurization and delivery system, and liquid engine power system on the rocket can correctly respond to instructions such as rocket attitude control, supplementary pressurization control, and engine power regulation control, and timely and accurately perform rocket body attitude correction, supplementary pressurization control, and power regulation. During system polarity testing, mainly by observing the movement of the actuators of the servo system, the opening and closing conditions of the solenoid valves of the terminal attitude control correction system, the pressurization and delivery system solenoid valves, and the engine power system solenoid valves, the observer comprehensively judges whether the polarity test is correct based on the above observation information.

[0003] Currently, most of the judgment methods for rocket system polarity testing rely on on-site observation by testers and then comprehensive analysis of phenomena for discrimination. This method mainly has the problems of poor reliability of personnel observation and the risks of misjudgment and missed judgment. At the same time, the scheme relying on on-site observation by testers cannot generate test data, cannot accurately judge the correctness of system polarity testing, and is not conducive to tracing test data. In addition, for rockets with boosters, terminal attitude control participating in multi-segment polarity control and multiple ignition controls, the observation of test phenomena is more complex, and it is necessary to conduct associated discrimination on the servo systems of multiple boosters, the actions of terminal attitude control valves, and the actions of multi-stage engine valves, which requires higher requirements for the number and ability of observers.

[0004] In view of this, it is necessary to provide a new technical solution to solve the above problems. Summary of the Invention

[0005] To solve the above technical problems, the present application provides a polarity testing device and method for a liquid rocket system, which can effectively deeply integrate the liquid rocket polarity test data with the system data, realize accurate data closed-loop, meet the requirements of systematic and automated testing of launch vehicles, improve product reliability, and also improve production efficiency.

[0006] A polarity testing device for a liquid rocket system includes: a wireless data acquisition system, a data transmission system, and a control and data processing system; The wireless data acquisition system includes several data acquisition devices for collecting state detection data during the system polarity test; several of the data acquisition devices are respectively arranged at the parts to be polarity tested in the servo system, the terminal attitude control correction system, the pressurization and delivery system, and the engine power system; The wireless data acquisition system is communicatively connected to the control and data processing system through the data transmission system, and transmits the data collected by the wireless data acquisition system to the control and data processing system; The control and data processing system is configured to control the wireless data acquisition system, and perform real-time processing and discrimination on the received status detection data.

[0007] Preferably, a single data acquisition device includes a sensor and its equipped peripheral circuit, power supply, and sensor analog output interface; The sensor is an inclinometer gyroscope or a Hall sensor; the inclinometer gyroscope is used to detect the motion data of the actuator in the servo system; the Hall sensor is used to detect the opening and closing conditions of the solenoid valves in the terminal attitude control correction system, the solenoid valves in the pressurization and delivery system, and the solenoid valves in the engine power system.

[0008] Preferably, when the sensor is a Hall sensor, it includes three Hall sensors for detecting the magnetic field of the element to be detected; the data acquisition device uses the three Hall sensors to detect the input of the three magnetic fields, and determines the position with the strongest magnetic field according to the difference between the output voltage value and the reference voltage of the sensor.

[0009] Preferably, the data acquisition device further includes a data storage module and a signal processing module; The signal processing module can process the signals output by the inclinometer gyroscope or the Hall sensor, so that the data acquisition device has a correct and effective acquisition voltage value and improves the anti-interference ability; The data storage module can synchronously store the data collected by the sensor; the data storage module has a function of computer readback through a Micro-USB interface.

[0010] Preferably, the signal processing module has a software processing function module and a hardware processing function module; The hardware processing function module is an RC low-pass filter circuit connected to the voltage output terminal for eliminating interference above 1 kHz; The software processing function module can perform debounce processing on the acquired voltage value.

[0011] Preferably, the data transmission system includes a data transmission relay module and a wireless communication module fixedly connected to the data acquisition device; the wireless communication module is communicatively connected to the data acquisition device; The data transmission relay module is communicatively connected to the control and data processing system through Ethernet; the data transmission relay module is wirelessly communicatively connected to the wireless data acquisition system through a local area network protocol based on the IEEE 802.15.4 standard.

[0012] Preferably, the communication frequency of the wireless communication module is 2.4 GHz, the output intensity is greater than 3 dBm, the wireless frequency band is 2.4 GHz, the network type is star, and the wireless transmission rate is 250 kbps.

[0013] Preferably, the wireless communication module has a sleep mode: when there is no detection requirement, the wireless communication module is put into the sleep mode by sending an instruction through software.

[0014] Preferably, the control and data processing system includes a self-check module, a time synchronization module, a parameter configuration module, a channel and time reference configuration module, a control module, a data analysis module, and a test result display and recording module; The self-check module is used to implement self-check of the battery power and communication link and judge the online status of the sensor; The time synchronization module is configured to achieve time unification of each data acquisition device by uniformly timing each data acquisition device; The parameter configuration module is used to configure parameters for the solenoid valve action threshold and low battery threshold in the hardware processing function module and to configure parameters for the software processing function module; The channel and time reference configuration module is used to implement channel binding configuration between the data acquisition device and the corresponding object to be measured; The control module accesses the local area network of the liquid rocket launch control system, receives instructions from the launch control main control terminal, and simultaneously obtains test data in the liquid rocket launch control system server in real time; The data analysis module is used to compare the status detection data collected during the system polarity test with the instruction data, judge the correctness of the liquid rocket system polarity test, and realize automatic interpretation of the system polarity test; The test result display and recording module is used to display the code name of the object to be measured, the action time, the action curve, the acquisition time, and the time difference relative to the set time reference, and record and save the test results.

[0015] According to another aspect of the present application, there is also provided a method for testing the polarity of a liquid rocket system, which uses the liquid rocket system polarity testing device for polarity testing, including: By analyzing the working principles of the rocket system polarity test servo system, the final attitude control correction system, and the engine power system, select the corresponding data acquisition device and install it at the position to be detected; When the liquid rocket system is subjected to polarity testing, use the corresponding data acquisition device to collect data on the parts where relative position changes or solenoid valves act in the servo system, the final attitude control correction system, and the engine power system; The collected test data is transmitted to the control and data processing system by using a data transmission system; The control and data processing system compares the received test data with the instruction data to judge the correctness of the liquid rocket system polarity test, and realizes the automatic interpretation of the system polarity test.

[0016] Compared with the prior art, the present application has at least the following beneficial effects: The present invention breaks through the conventional process method for the polarity test of launch vehicles, effectively integrates the liquid rocket polarity test data with the system data in depth, realizes the accurate data closed-loop, meets the requirements of the systematic and automatic testing of launch vehicles, improves the product reliability, and also improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 is the overall principle schematic diagram of the liquid rocket system polarity test equipment of the present invention; Figure 2 is the functional block diagram of the data acquisition device of the present invention; Figure 3 is the flow chart of the information discrimination method of the data acquisition device of the present invention.

[0018] Among them, the above-mentioned drawings include the following reference numerals: 100, wireless data acquisition system; 200, data transmission system; 300, control and data processing system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0020] As Figure 1 shown, a liquid rocket system polarity test equipment includes: a wireless data acquisition system 100, a data transmission system 200, and a control and data processing system 300.

[0021] The wireless data acquisition system 100 includes several data acquisition devices for collecting status detection data during the system polarity test; the several data acquisition devices are respectively arranged at the parts to be polarity tested in the servo system, the final attitude control correction system, the pressurization and delivery system, and the engine power system; The wireless data acquisition system 100 is communicatively connected to the control and data processing system 300 through the data transmission system 200, and transmits the data collected by the wireless data acquisition system 100 to the control and data processing system 300; The control and data processing system 300 is configured to control the wireless data acquisition system 100, and perform real-time processing and discrimination on the received status detection data.

[0022] In this embodiment, the wireless data acquisition system 100 is arranged in the rocket final assembly workshop, and the control and data processing system 300 is arranged in the rocket measurement and control hall.

[0023] Specifically, a single data acquisition device includes a sensor and the equipped peripheral circuit, power supply, and sensor analog output interface.

[0024] In this embodiment, the sensor is an inclination gyroscope or a Hall sensor. The inclination gyroscope is used to detect the motion data of the executing components in the servo system, and the Hall sensor is used to detect the opening and closing conditions of the solenoid valves in the final attitude control correction system, the pressurization and delivery system, and the engine power system.

[0025] When the sensor is a Hall sensor, it includes three-way Hall sensors for detecting the magnetic field of the element to be detected; the data acquisition device uses the three-way Hall sensors to detect the input of the three-way magnetic fields, and determines the position with the strongest magnetic field according to the difference between the output voltage value and the reference voltage of the sensor, as Figure 2 and Figure 3 shown. Among them, the reference voltage of the sensor is the voltage output value when there is no solenoid valve action.

[0026] In addition, the data acquisition device further includes a data storage module and a signal processing module. The signal processing module can process the signals output by the inclination gyroscope or the Hall sensor, so that the data acquisition device has correct and effective acquisition voltage values, and improves the anti-interference ability. The data storage module can synchronously store the data collected by the sensor to prevent the loss of wireless communication data. The data storage module has the function of computer read-back through the Micro-USB interface.

[0027] Specifically, the signal processing module has a software processing function module and a hardware processing function module.

[0028] In the hardware processing function module, the voltage range of the sensor output signal is 0 - 2V. To make the voltage value output by the sensor more stable under a constant magnetic field, an RC low-pass filter circuit is connected to the voltage output terminal to eliminate interference above 1kHz.

[0029] In the software processing function module, the acquired voltage values are subjected to debounce processing, that is, the voltage data with abnormal increases or decreases compared to the previous and subsequent data are discarded, and the average value of the valid voltage data within 100ms is calculated.

[0030] The data transmission system 200 includes a data transmission relay module and a wireless communication module fixedly connected to the data acquisition device, and the wireless communication module is communicatively connected to the data acquisition device.

[0031] The data transmission relay module is communicatively connected to the control and data processing system 300 through Ethernet; the data transmission relay module is wirelessly communicatively connected to the wireless data acquisition system 100 through a local area network protocol based on the IEEE 802.15.4 standard. In this embodiment, the data transmission relay module is wirelessly communicatively connected to the wireless data acquisition system 100 through the zigbee protocol.

[0032] Specifically, among the main technical indicators of the wireless communication module, the communication frequency is 2.4GHz, and the output intensity is greater than 3dBm.

[0033] In the wireless network configuration, the wireless frequency band is 2.4GHz, the network type is star, and the wireless transmission rate is 250kbps.

[0034] The data transmission relay module includes a communication frequency of 2.4GHz, an output intensity greater than 19dBm, and a communication distance in an open environment greater than 1000m.

[0035] To achieve the convenience of operating the test equipment, the data acquisition device uses a wireless method for data transmission. At the same time, the telemetry system of the rocket, the ground launch control system (front and rear end maritime wireless communication), and the satellite navigation system all use wireless methods to transmit data. Therefore, when designing the data transmission system of this equipment in a complex wireless environment, it is necessary to consider both that its own wireless link is not interfered with and that it does not interfere with the wireless link of the rocket system. Therefore, according to the characteristics of the rocket system and the equipment, the system electromagnetic compatibility design is carried out from the following aspects: ( ) Protect the sensitive signals. For the sensor signals, software and hardware filtering methods are used to improve their anti-interference ability.

[0036] ( ) Adjust the Zigbee wireless communication frequency points according to the system electromagnetic environment to avoid mutual interference with other wireless networks of the rocket system.

[0037] In addition, a single data acquisition device is independently powered by a battery, and it powers a wireless communication module that is expected to be fixedly connected, with the wireless communication module consuming the most power. To achieve an optimal power usage method, a sleep mode is designed. That is, when the system has no monitoring requirements, it can enter the sleep mode by sending an instruction through software, reducing the power consumption.

[0038] In the sleep mode, the data acquisition device is powered on, and the control and data processing system 300 issues a sleep instruction. It is determined whether the wireless communication module has received a remote wake-up instruction. If a remote wake-up instruction is received, it enters the normal working state, and it is further determined whether a remote sleep instruction is received. If a remote sleep instruction is received, it enters the sleep state; otherwise, it enters the normal working state. Correspondingly, when determining whether the wireless communication module has received a remote wake-up instruction, if a remote wake-up instruction is not received, it continues to wait for the remote wake-up instruction.

[0039] The control and data processing system 300 includes a self-check module, a time synchronization module, a parameter configuration module, a channel and time reference configuration module, a control module, a data analysis module, and a test result display and recording module.

[0040] The self-check module is used to implement self-check of the battery power and communication link and to determine the online status of the sensor.

[0041] The time synchronization module is configured to achieve time unification of each data acquisition device by uniformly timing each data acquisition device.

[0042] To achieve universality for data acquisition devices of the same category, eliminate the limitations of customization of the acquisition device, and facilitate on-site personnel operation. The acquisition differences of each data acquisition device are investigated. Under the condition of ensuring acquisition accuracy, the same "threshold" setting is used to the greatest extent. At the same time, the test equipment is also designed with a "threshold" setting interface in the software. According to the specific situation of the system test or to adapt to future tests of other different objects, it can be adjusted through software without changing the hardware.

[0043] The parameter configuration module is used to configure parameters for the solenoid valve action threshold and low power threshold in the hardware processing function module and to configure parameters for the software processing function module.

[0044] The channel and time reference configuration module is used to implement channel binding configuration between the data acquisition device and the corresponding object under test.

[0045] The control module is connected to the local area network of the liquid rocket launch measurement and control system, receives instructions from the main control terminal of the launch measurement and control system, and simultaneously obtains the test data in the server of the liquid rocket launch measurement and control system in real time. Therefore, when the main control terminal of the launch measurement and control system sends the "ignition" instruction, the control module of the liquid rocket polarity test equipment processes the collected data in real time. At the same time, the control module can set the time reference for calculating the relative time of the actions of the measured object, including using the connection of the action of a certain measured object as the time reference.

[0046] The data analysis module is used to compare the state detection data collected during the system polarity test with the instruction data, judge the correctness of the liquid rocket system polarity test, and realize the automatic interpretation of the system polarity test.

[0047] The test result display and recording module is used to display the code of the measured object, the action time, the action curve, the acquisition time, and the time difference relative to the set time reference, and record and save the test results for further export and analysis afterwards.

[0048] The test data collected by the data acquisition device, including the real-time collected data and the data recorded in the memory, are summarized and uploaded to the control module, automatically analyzed by the data analysis module, and all the actions of the measured objects are displayed by category, including the timing results, the nozzle action curve, etc. on the human-machine interaction interface. The displayed information includes: the code of the measured object, the action time, the action curve, the absolute time (acquisition time), and the relative time (the time difference relative to the set time reference).

[0049] Based on the same inventive concept, a method for testing the polarity of a liquid rocket system is also provided, using the above-mentioned liquid rocket system polarity test equipment for polarity testing, including: By analyzing the working principles of the rocket system polarity test servo system, the final attitude control correction system, and the engine power system, the corresponding data acquisition device is selected and installed at the position to be detected.

[0050] When the liquid rocket system is subjected to polarity testing, the corresponding data acquisition device is used to collect data on the parts where relative position changes or solenoid valve actions occur in the servo system, the final attitude control correction system, and the engine power system.

[0051] The collected test data is transmitted to the control and data processing system by using the data transmission system.

[0052] The control and data processing system compares the received test data with the instruction data, judges the correctness of the liquid rocket system polarity test, and realizes the automatic interpretation of the system polarity test.

[0053] When conducting a polarity test on a liquid rocket system, a corresponding data acquisition device is used to collect data from the parts in the servo system, final attitude control correction system, and engine power system where relative position changes occur or solenoid valves operate, including: Turn on the power of the wireless data acquisition system and install the data acquisition device.

[0054] Turn on the power of all devices, and the data acquisition device enters the acquisition mode.

[0055] The data acquisition device stops collecting data and enters the standby mode, waiting for a data acquisition command.

[0056] Perform a system self-check and record the installation numbers of the data acquisition devices.

[0057] After the system self-check passes, perform time synchronization.

[0058] The data acquisition device performs information acquisition, packaging, and uploading.

[0059] Store and observe the action data of the parts where the polarity test actions occur.

[0060] Use the data transmission system to transmit the collected test data to the control and data processing system, including: After the data acquisition of the data acquisition device is completed, the data acquisition device stops data acquisition and uploading.

[0061] Export the data results by reading through wireless communication or USB interface.

[0062] After the data results are successfully exported, power off and remove all devices.

[0063] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" can be used here to describe the spatial position relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures after inversion. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0064] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A polar testing device for a liquid rocket system, characterized in that, Including: A wireless data acquisition system, a data transmission system, and a control and data processing system; The wireless data acquisition system includes a number of data acquisition devices for collecting status detection data during the system polarity test; several of the data acquisition devices are respectively arranged at the parts to be polarity tested in the servo system, the final attitude control correction system, the pressurization and delivery system, and the engine power system; The wireless data acquisition system is communicatively connected to the control and data processing system through the data transmission system, and transmits the data collected by the wireless data acquisition system to the control and data processing system; The control and data processing system is configured to control the wireless data acquisition system, and perform real-time processing and discrimination on the received status detection data.

2. The liquid rocket system polarity testing device according to claim 1, characterized in that, A single data acquisition device includes a sensor and the equipped peripheral circuit, power supply, and sensor analog output interface; The sensor is an inclinometer gyroscope or a Hall sensor; the inclinometer gyroscope is used to detect the motion data of the executing component in the servo system; the Hall sensor is used to detect the opening and closing conditions of the solenoid valves in the final attitude control correction system, the pressurization and delivery system, and the engine power system.

3. The liquid rocket system polarity testing device according to claim 2, characterized in that, When the sensor is a Hall sensor, it includes a three-way Hall sensor for detecting the magnetic field of the element to be detected; the data acquisition device uses the three-way Hall sensor to detect the input of the three-way magnetic field, and determines the position with the strongest magnetic field according to the difference between the output voltage value and the reference voltage of the sensor.

4. The liquid rocket system polarity testing device according to claim 3, wherein The data acquisition device further includes a data storage module and a signal processing module; The signal processing module can process the signals output by the inclinometer gyroscope or the Hall sensor, so that the data acquisition device has a correct and effective acquisition voltage value, and improves the anti-interference ability; The data storage module can synchronously store the data collected by the sensor; the data storage module has a computer read-back function through the Micro-USB interface.

5. The polar testing device for a liquid rocket system according to claim 4, wherein The signal processing module has a software processing function module and a hardware processing function module; The hardware processing function module is an RC low-pass filter circuit connected to the voltage output end for eliminating interference above 1 kHz; The software processing function module can perform debounce processing on the acquired voltage value.

6. The polar testing device for a liquid rocket system according to claim 5, characterized in that, The data transmission system includes a data transmission relay module and a wireless communication module fixedly connected to the data acquisition device; the wireless communication module is communicatively connected to the data acquisition device; The data transmission relay module is communicatively connected to the control and data processing system through Ethernet; the data transmission relay module is wirelessly communicatively connected to the wireless data acquisition system through a local area network protocol based on the IEEE 802.15.4 standard.

7. The polar testing device for a liquid rocket system according to claim 6, characterized in that, The communication frequency of the wireless communication module is 2.4 GHz, the output intensity is greater than 3 dBm, the wireless frequency band is 2.4 GHz, the network type is star, and the wireless transmission rate is 250 kbps.

8. The polar testing device for a liquid rocket system according to claim 7, wherein, The wireless communication module has a sleep mode: when there is no detection requirement, the wireless communication module is made to enter the sleep mode by sending an instruction through software.

9. The liquid rocket system polarity testing device according to any one of claims 2-8, characterized in that, The control and data processing system includes a self-check module, a time synchronization module, a parameter configuration module, a channel and time reference configuration module, a control module, a data analysis module, and a test result display and recording module; The self-check module is used to implement self-check of battery power and communication link, and judge the online status of the sensor; The time synchronization module is configured to achieve time unification of each data acquisition device by uniformly timing each data acquisition device; The parameter configuration module is used to configure parameters for the solenoid valve action threshold and low battery threshold in the hardware processing function module, and to configure parameters for the software processing function module; The channel and time reference configuration module is used to implement channel binding configuration between the data acquisition device and the corresponding object to be measured; The control module accesses the local area network of the liquid rocket launch control system, receives instructions from the launch control master terminal, and simultaneously obtains test data in the liquid rocket launch control system server in real time; The data analysis module is used to compare the status detection data collected during the system polarity test with the command data, judge the correctness of the liquid rocket system polarity test, and realize automatic interpretation of the system polarity test; The test result display and recording module is used to display the code name of the object to be measured, the action time, the action curve, the acquisition time, and the time difference relative to the set time reference, and record and save the test results.

10. A method for polar testing of a liquid rocket system, characterized in that, Using the liquid rocket system polarity test equipment according to any one of claims 1-9 for polarity test, includes: By analyzing the working principles of the rocket system polarity test servo system, the final attitude control correction system, and the engine power system, select the corresponding data acquisition device and install it at the position to be detected; When the liquid rocket system is subjected to polarity test, use the corresponding data acquisition device to collect data on the parts where relative position changes or solenoid valve actions occur in the servo system, the final attitude control correction system, and the engine power system; Use the data transmission system to transmit the collected test data to the control and data processing system; The control and data processing system compares the received test data with the command data, judges the correctness of the liquid rocket system polarity test, and realizes automatic interpretation of the system polarity test.

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